Rotating shaft mechanism and electronic equipment

Abstract

The invention relates to the technical field of terminals, in particular to a rotating shaft mechanism and electronic equipment. The rotating shaft mechanism comprises a rotating shaft base; the rotating modules are arranged on the rotating shaft base and used for being connected with the middle frame, so that the middle frame can rotate relative to the rotating shaft base; the plurality of rotating modules comprise at least one first rotating module and two second rotating modules; wherein the two second rotating modules are arranged at the two ends of the rotating shaft base in an abutting mode, and the at least one first rotating module is arranged between the two second rotating modules; each rotating module internally comprises at least one group of friction surfaces which abut against each other, and each group of friction surfaces is used for generating friction force for preventing the middle frame from rotating; the number of the friction surfaces in the first rotating module is larger than that of the friction surfaces in the second rotating module. According to the rotating shaft mechanism and the electronic equipment, the flatness of the middle frame can be improved, and the reliability of connection between the middle frame and other structures and the reliability of a display screen and a whole machine are improved.

Description

Technical Field

[0001] This application relates to the technical field of terminals, and particularly to a rotating shaft mechanism and an electronic device. Background Art

[0002] In order to facilitate the carrying and use of electronic devices, the demand for foldable electronic devices has gradually increased. As an important component in foldable electronic devices, the rotating shaft mechanism can be used to realize the folding and unfolding of electronic devices. The rotating shaft mechanism is usually connected to the middle frame of the foldable electronic device. When the foldable electronic device is about to be in a folded state, the rotating shaft mechanism can provide a closing force to drive the middle frame to rotate along the folding axis, so that the electronic device is closed to the folded state. When the foldable electronic device is in the folded state, the closing force can also be used to maintain the folded state of the electronic device.

[0003] With the development of the thinning of electronic devices, the structural thickness and material density of the middle frame of the electronic device gradually decrease, resulting in a gradual decrease in the structural stiffness of the middle frame. The closing force applied by the rotating shaft mechanism to the middle frame may cause local deformation of the middle frame, resulting in a poor flatness of the middle frame and affecting the connection reliability of other structural parts with the middle frame. The deformed middle frame may also scrape the display screen protective film, affecting the reliability of the display screen. Summary of the Invention

[0004] In order to solve the above problems, this application provides a rotating shaft mechanism and an electronic device, which can improve the flatness of the middle frame, improve the connection reliability between the middle frame and other structures, as well as the reliability of the display screen and the whole machine.

[0005] To achieve the above object, in a first aspect, this application provides a rotating shaft mechanism applied to a foldable electronic device. The rotating shaft mechanism includes: a rotating shaft base; a plurality of rotating modules arranged on the rotating shaft base, and the plurality of rotating modules are used to connect with the middle frame of the foldable electronic device so that the middle frame can rotate relative to the rotating shaft base; the plurality of rotating modules include: at least one first rotating module and two second rotating modules; wherein, along the rotation axis direction of the foldable electronic device, the two second rotating modules are close to both ends of the rotating shaft base, and at least one first rotating module is arranged between the two second rotating modules; each rotating module internally includes at least one set of abutting friction surfaces, and each set of friction surfaces is used to generate a frictional force that hinders the rotation of the middle frame; wherein, the number of friction surfaces inside the first rotating module is greater than the number of friction surfaces inside the second rotating module.

[0006] The rotating shaft mechanism provided by the embodiment of the present application can utilize the friction surfaces in the first rotating module and the second rotating module to provide damping force, so as to facilitate the design of the whole machine hovering. At the same time, the number of friction surfaces inside the first rotating module is greater than the number of friction surfaces inside the second rotating module, which can reasonably distribute the closing force applied to the rotating shaft mechanism, so that the closing force provided by the first rotating module is less than the closing force provided by the second rotating module, thereby reducing the deformation amount of the middle frame at the position with weak stiffness, improving the flatness of the middle frame and the connection reliability with each structure, reducing the influence on the display screen, and improving the reliability of the whole machine.

[0007] In an alternative embodiment, the middle frame is provided with at least one receiving groove for receiving the battery; at least one opening is also provided at a position where the middle frame is close to the rotating shaft base, and the opening is used for arranging the through-shaft flexible circuit board; along the folding axis direction, at least one first rotating module is adjacent to the receiving groove and / or the opening. The structural stiffness of the position where the receiving groove and / or the opening are provided on the middle frame is relatively weak. Setting the first rotating module near the position with relatively weak structural stiffness can effectively reduce the deformation amount of the position with relatively small stiffness, thereby improving the reliability of the middle frame and the whole machine.

[0008] In an alternative embodiment, the first rotating module includes a first pin shaft, a first swing arm and a first matching part; the first pin shaft is connected to the first swing arm and the rotating shaft base; the first pin shaft is provided with a first limiting ring; along the axis direction of the first pin shaft, the first matching part is slidably sleeved on the first pin shaft, the first matching part is located between the first swing arm and the first limiting ring, and abuts against the first swing arm and the first limiting ring; the abutting surface between the first matching part and the first limiting ring forms a first group of friction surfaces; the first group of friction surfaces are used for providing sliding friction force when the first swing arm drives the first pin shaft to rotate relative to the rotating shaft base and the first matching part; the first group of friction surfaces are also used for providing static friction force when the first swing arm drives the first pin shaft to have a tendency to rotate relative to the rotating shaft base and the first matching part. In this way, the sliding friction force or the static friction force can be utilized to reduce the closing force generated by the cooperation connection between the first matching part and the first swing arm, and further reduce the closing force applied by the first rotating module to the middle frame during the rotation process.

[0009] In an alternative embodiment, the first rotating module further includes a friction plate bracket and a first friction plate; the first friction plate and the friction plate bracket are sleeved on the first pin shaft, and along the direction of the first engaging portion towards the first limiting ring, the first friction plate and the friction plate bracket are sequentially arranged between the first engaging portion and the first limiting ring; the abutting surface of the first friction plate and the first engaging portion forms a second set of friction surfaces, the abutting surface of the first friction plate and the friction plate bracket forms a third set of friction surfaces, and the abutting surface of the friction plate bracket and the first limiting ring forms a fourth set of friction surfaces; the second set of friction surfaces, the third set of friction surfaces, and the fourth set of friction surfaces are used to provide sliding friction when the first pin shaft drives the first friction plate to rotate relative to the friction plate bracket and the first engaging portion; the second set of friction surfaces, the third set of friction surfaces, and the fourth set of friction surfaces are also used to provide static friction when the first pin shaft drives the first friction plate to have a tendency to rotate relative to the friction plate bracket and the first engaging portion. In this way, the closing force generated by the cooperation connection between the first engaging portion and the first swing arm can be reduced by using sliding friction or static friction, and further, the closing force applied by the first rotating module to the middle frame during the rotation process can be reduced.

[0010] In an alternative embodiment, the first pin shaft is further provided with a first card slot, and along the axial direction of the first pin shaft, the first card slot is far from the first limiting ring; the first rotating module further includes a first snap ring and a second friction plate; the first snap ring is clamped in the first card slot; the second friction plate is sleeved on the first pin shaft and is located between the first snap ring and the first swing arm; the abutting surface of the second friction plate and the first snap ring forms a fifth set of friction surfaces; the fifth set of friction surfaces is used to provide sliding friction when the first pin shaft drives the second friction plate to rotate relative to the first snap ring; the fifth set of friction surfaces is also used to provide static friction when the first pin shaft drives the second friction plate to have a tendency to rotate relative to the first snap ring. In this way, a set of friction surfaces can be formed on the abutting surface between the first swing arm and the first snap ring, so as to further reduce the closing force generated by the cooperation between the first engaging portion and the first swing arm by using friction, reduce the deformation amount of the middle frame, and improve the reliability of the middle frame and the whole machine.

[0011] In an alternative embodiment, the first rotating module further includes a second engaging portion that cooperates with the first swing arm; the second engaging portion is slidably sleeved on the first pin shaft and is located between the first swing arm and the second friction plate; the abutting surface of the second friction plate and the second engaging portion forms a sixth set of friction surfaces; the sixth set of friction surfaces is used to provide sliding friction when the first pin shaft drives the second friction plate to rotate relative to the second engaging portion; the sixth set of friction surfaces is also used to provide static friction when the first pin shaft drives the second friction plate to have a tendency to rotate relative to the second engaging portion. In this way, the number of friction surfaces can be further increased, the total friction force can be increased, so as to reduce the closing force, thereby reducing the deformation of the middle frame, improving the reliability of the middle frame and the whole machine, and at the same time increasing the damping force, which is convenient for realizing the hovering design of the whole machine.

[0012] In an alternative embodiment, the first swing arm has a first plane facing the second friction plate; the second friction plate abuts against the first plane; the abutting surface between the second friction plate and the first plane forms a seventh set of friction surfaces; the seventh set of friction surfaces is configured to provide a sliding friction force when the first pin shaft drives the second friction plate to rotate relative to the first plane; the seventh set of friction surfaces is further configured to provide a static friction force when the first pin shaft drives the second friction plate to have a tendency to rotate relative to the first plane. In this way, the number of friction surfaces can be further increased, the total friction force can be increased, the closing force can be reduced, thereby reducing the deformation of the middle frame, improving the reliability of the middle frame and the whole machine, and at the same time increasing the damping force, which is convenient for realizing the hovering design of the whole machine.

[0013] In an alternative embodiment, the first swing arm has a first cam structure facing the first mating part, and the first cam structure is sleeved on the first pin shaft; the first mating part includes a first cam bracket, a first elastic member and a first elastic member bracket; along the direction of the first cam structure facing the first limiting ring, the first cam bracket, the first elastic member and the first elastic member bracket are sequentially sleeved on the first pin shaft; a first cam surface is provided on one side of the first cam bracket facing the first cam structure, and the first cam surface is in mating connection with the first cam structure; the first elastic member bracket abuts against the first limiting ring; the abutting surface between the first elastic member bracket and the first limiting ring forms a first set of friction surfaces; the first set of friction surfaces is configured to provide a sliding friction force when the first cam structure drives the first pin shaft to rotate relative to the first cam bracket, the first elastic member and the first elastic member bracket; the first set of friction surfaces is further configured to provide a static friction force when the first cam structure drives the first pin shaft to have a tendency to rotate relative to the first cam bracket, the first elastic member and the first elastic member bracket. In this way, the friction surface between the first elastic member bracket and the first limiting ring can generate a friction force opposite to the closing force, and the friction force can reduce the closing force generated by the first cam structure and the first cam bracket, thereby reducing the closing force that the first rotation module can apply to the middle frame, and further reducing the deformation amount of the middle frame at the connection position with the first rotation module, and improving the reliability of the middle frame and the whole machine structure.

[0014] In an alternative embodiment, the first swing arm has a second cam structure facing the second mating part, and the second cam structure is sleeved on the first pin shaft; the second mating part includes a second cam bracket; a second cam surface is provided on one side of the second cam bracket facing the second cam structure, and the second cam surface is in mating connection with the second cam structure; the second cam structure can drive the first pin shaft to rotate relative to the second cam bracket. In this way, the rolling friction surface formed between the second cam surface and the second cam structure can be used to provide a damping force, which is convenient for reducing the deformation of the middle frame and improving the reliability of the middle frame and the whole machine. At the same time, the damping force can also be increased, which is convenient for realizing the hovering design of the whole machine.

[0015] In an alternative embodiment, the second rotation module includes a second pin shaft, a second swing arm, and a third mating portion; the second pin shaft is connected to the rotating shaft base; the second swing arm has a third cam structure, and the third cam structure is sleeved on the second pin shaft; the second pin shaft is provided with a second limiting ring; the third mating portion includes a third cam bracket, a second elastic member, and a second elastic member bracket; along the direction of the third cam structure towards the second limiting ring, the third cam bracket, the second elastic member, and the second elastic member bracket are sequentially sleeved on the second pin shaft; a third cam surface is provided on one side of the third cam bracket facing the third cam structure, and the third cam surface is in mating connection with the third cam structure; the second elastic member bracket abuts against the second limiting ring; the third cam structure can rotate relative to the second pin shaft and the third cam bracket; the slope angle of the inclined surface of the first cam structure is smaller than the slope angle of the inclined surface of the third cam structure. In this way, the closing force that the first rotation module can provide is smaller than the closing force that the second rotation module can provide, so that the overall closing force of the rotating shaft mechanism can be reasonably distributed between the first rotation module and the second rotation module. On the premise of realizing the automatic pushing of the middle frame, the deformation amount of the position with weak stiffness of the middle frame can be reduced, and the reliability of the middle frame and the whole machine can be improved.

[0016] In an alternative embodiment, when the rotating shaft mechanism is in the folded state, the elastic force of the first elastic member is smaller than the elastic force of the second elastic member. In this way, the closing force that the first rotation module can provide is smaller than the closing force that the second rotation module can provide, so that the overall closing force of the rotating shaft mechanism can be reasonably distributed between the first rotation module and the second rotation module. On the premise of realizing the automatic pushing of the middle frame, the deformation amount of the position with weak stiffness of the middle frame can be reduced, and the reliability of the middle frame and the whole machine can be improved.

[0017] In an alternative embodiment, a gear meshing portion is further provided on the circumferential side surface of the third cam structure; the second rotation module further includes a synchronous gear, the synchronous gear is rotatably connected between the rotating shaft base and the third cam bracket, and the synchronous gear is in meshing connection with the gear meshing portion; the third cam structure can drive the synchronous gear to rotate synchronously. In this way, the third cam structure can drive the synchronous gear to rotate synchronously, so that the second swing arms located on both sides of the rotating shaft base can rotate relative to the rotating shaft base simultaneously, so as to realize the symmetry of the rotation of the middle frame, facilitate the balance of the closing forces on both sides of the rotating shaft base, and thus facilitate the maintenance of the smoothness of the rotation of the middle frame.

[0018] In an alternative embodiment, the second pin shaft includes a first shaft section and a second shaft section; the third cam bracket, the second elastic member, and the second elastic member bracket are sleeved on the first shaft section; the third cam structure is sleeved on the second shaft section; the shaft diameter of the second shaft section is smaller than the shaft diameter of the first shaft section. In this way, more space can be provided for the setting of the gear meshing portion on the third cam structure, so as to avoid the poor structural strength of the gear meshing portion due to insufficient space, which affects the smoothness and reliability of the gear transmission.

[0019] To achieve the above object, in a second aspect, the present application provides a rotating shaft mechanism applied to a foldable electronic device. The rotating shaft mechanism includes: a rotating shaft base; a plurality of rotating modules arranged on the rotating shaft base, and the plurality of rotating modules are used to connect with the middle frame of the foldable electronic device so that the middle frame can rotate relative to the rotating shaft base; the plurality of rotating modules include: at least one first rotating module and two second rotating modules; wherein, along the rotation axis direction of the foldable electronic device, the two second rotating modules are arranged close to both ends of the rotating shaft base, and at least one first rotating module is arranged between the two second rotating modules; each rotating module internally includes at least one set of abutting cam mating surfaces; wherein, the slope angle of the cam mating surface inside the first rotating module is smaller than the slope angle of the cam mating surface inside the second rotating module. In this way, the closing force that the first rotating module can provide will be smaller than the closing force that the second rotating module can provide, so that the overall closing force of the rotating shaft mechanism can be reasonably distributed between the first rotating module and the second rotating module. On the premise of realizing the automatic pushing of the middle frame, the deformation amount of the position with weak middle frame stiffness can also be reduced, and the reliability of the middle frame and the whole machine can be improved.

[0020] In an optional implementation manner, the first rotating module includes a first elastic member for providing an elastic abutting force for the cam mating surface; the second rotating module includes a second elastic member for providing an elastic abutting force for the cam mating surface; when the rotating shaft mechanism is in a folded state, the elastic force of the first elastic member is smaller than the elastic force of the second elastic member. In this way, the closing force that the first rotating module can provide will be smaller than the closing force that the second rotating module can provide, so that the overall closing force of the rotating shaft mechanism can be reasonably distributed between the first rotating module and the second rotating module. On the premise of realizing the automatic pushing of the middle frame, the deformation amount of the position with weak middle frame stiffness can also be reduced, and the reliability of the middle frame and the whole machine can be improved.

[0021] To achieve the above object, in a third aspect, the present application provides an electronic device which is foldable. The electronic device includes: a first middle frame, a second middle frame, and a rotating shaft mechanism as described in the first aspect or the second aspect above; the rotating shaft mechanism includes at least one first rotating component and two second rotating components; wherein, along the rotation axis direction of the foldable electronic device, the two second rotating components are disposed close to both ends of the rotating shaft base, and at least one first rotating component is disposed between the two second rotating components; the first rotating component includes two first rotating modules, and the two first rotating modules are symmetrically disposed on both sides of the rotating shaft base along the center line of the rotating shaft base; the second rotating component includes two second rotating modules, and the two second rotating modules are symmetrically disposed on both sides of the rotating shaft base along the center line of the rotating shaft base; the first middle frame is connected to the first rotating module and the second rotating module located on the same side of the rotating shaft base; the second middle frame is connected to the first rotating module and the second rotating module located on the other side of the rotating shaft base.

[0022] It can be understood that the above-provided electronic device applies the rotating shaft mechanism provided above. Therefore, the beneficial effects it can achieve can refer to the beneficial effects in the above-provided rotating shaft mechanism, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of the form of an in-foldable screen mobile phone provided in this embodiment;

[0025] Figure 2 is a schematic diagram of the form of an out-foldable screen mobile phone provided in this embodiment;

[0026] Figure 3 is a schematic structural diagram of a perspective of an in-foldable screen mobile phone in the unfolded state provided in this embodiment;

[0027] Figure 4 is a schematic structural diagram of another perspective of an in-foldable screen mobile phone in the unfolded state provided in this embodiment;

[0028] Figure 5 is a schematic structural diagram of an in-foldable screen mobile phone in the folded state provided in this embodiment;

[0029] Figure 6 is a schematic structural diagram of the first housing and the second housing in the unfolded state provided in this embodiment;

[0030] Figure 7It is a schematic structural diagram of an intermediate state of an in-foldable screen mobile phone provided by this embodiment;

[0031] Figure 8 It is a schematic structural diagram of an in-foldable screen mobile phone provided by this embodiment that is about to close to the folded state;

[0032] Figure 9 It is a schematic structural diagram of the folded state of an in-foldable screen mobile phone provided by this embodiment;

[0033] Figure 10 It is along Figure 5 A partial cross-sectional view in the A-A direction in;

[0034] Figure 11 It is a deformation analysis diagram of the second housing of an in-foldable screen mobile phone provided by this embodiment;

[0035] Figure 12 It is a schematic structural diagram of the unfolded state of a rotating shaft mechanism provided by this embodiment;

[0036] Figure 13 It is a schematic structural diagram of the folded state of a rotating shaft mechanism provided by this embodiment;

[0037] Figure 14 It is a deformation analysis diagram of the middle frame when the rotating shaft mechanism provided by this embodiment is applied to a foldable electronic device;

[0038] Figure 15 It is a schematic structural diagram of the cooperation between the rotating shaft mechanism and the middle frame provided by this embodiment;

[0039] Figure 16 It is a schematic structural diagram of a first rotating component provided by this embodiment;

[0040] Figure 17 It is a partial structural decomposition diagram of a first rotating component provided by this embodiment;

[0041] Figure 18 It is a schematic structural diagram of a second rotating component provided by this embodiment;

[0042] Figure 19 It is a partial structural decomposition diagram of a second rotating component provided by this embodiment;

[0043] Figure 20 It is a force analysis diagram between the cam mating surfaces provided by this embodiment;

[0044] Figure 21 It is a schematic structural diagram of an electronic device provided by this embodiment. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] Hereinafter, terms such as "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0047] In addition, in the present application, orientation terms such as "upper", "lower", "inner", "outer", etc. are defined relative to the orientation in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they can change accordingly with the change of the orientation in which the components in the drawings are placed.

[0048] A foldable electronic device may refer to an electronic device whose body can be unfolded or folded. When the foldable electronic device is in the unfolded state, it can provide a larger display area; when the foldable electronic device is in the folded state, it is convenient to carry, so that it is convenient for users to transform according to needs and improve the user experience.

[0049] In some cases, the foldable electronic device may further include an intermediate state, and the intermediate state is a state between the unfolded state and the folded state. It can be understood that the intermediate state does not have only a unique state, and can be any one or more states between the unfolded state and the folded state of the foldable electronic device.

[0050] It should be noted that the electronic devices in the embodiments of the present application may include, but are not limited to, mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, touch TVs, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices such as earphones, Bluetooth glasses, etc., virtual reality devices, etc., which are mobile or fixed terminals with foldable functions, and are not limited here.

[0051] Next, taking a foldable electronic device as a mobile phone as an example, specific descriptions will be made.

[0052] Figure 1It is a schematic diagram of the form of an in-foldable screen mobile phone provided in this embodiment.

[0053] Figure 2 It is a schematic diagram of the form of an out-foldable screen mobile phone provided in this embodiment.

[0054] Refer to Figure 1 and Figure 2 As shown, for the convenience of explaining the structure of the foldable mobile phone 100, an exemplary three-dimensional coordinate system is established based on the foldable mobile phone 100 in the embodiments of the present application. Among them, the width direction of the foldable mobile phone 100 can be defined as the X direction, the height direction of the foldable mobile phone 100 can be defined as the Y direction, and the thickness direction of the foldable mobile phone 100 can be defined as the Z direction. Figure 1 The foldable mobile phone 100 shown has a form where the dimension along the X direction is smaller than the dimension along the Y direction. For the foldable mobile phone 100 with a form where the dimension along the X direction is larger than the dimension along the Y direction, it is not shown separately.

[0055] The foldable mobile phone 100 can include an in-foldable screen mobile phone and an out-foldable screen mobile phone according to the different bending directions of its screen. As Figure 1 shown, the foldable mobile phone 100 in Figure 2 is an in-foldable screen mobile phone, and the foldable mobile phone 100 in

[0056] is an out-foldable screen mobile phone. Figure 1 As

[0057] shown, the body 10 of the in-foldable screen mobile phone can be folded towards one side of the foldable display screen 20, and the foldable display screen 20 is hidden inside the body 10 after the body 10 is folded. It can be seen that when the in-foldable screen mobile phone is in the folded state, the foldable display screen 20 is hidden inside the body 10. When the in-foldable screen mobile phone is in the unfolded state, the foldable display screen 20 presents a normal straight screen state. Figure 2 As

[0058] Figure 3 shown, the body 10 of the out-foldable screen mobile phone can be folded towards the back side of the foldable display screen 20, and the foldable display screen 20 is displayed outside the body 10 after the body 10 is folded. It can be seen that when the out-foldable screen mobile phone is in the folded state, the foldable display screen 20 surrounds the outside of the body 10. When the out-foldable screen mobile phone is in the unfolded state, the foldable display screen 20 presents a normal straight screen state.

[0059] As Figure 3 shown, Figure 3It is a schematic diagram of the XZ plane of the inner folding screen mobile phone in the unfolded state. The inner folding screen mobile phone may include a body 10 and a foldable display screen 20, and the foldable display screen 20 is attached to one surface of the body 10. The body 10 may include a first housing 111, a second housing 112, and a rotating structure 12.

[0060] Figure 4 It is a schematic structural diagram of another perspective of the inner folding screen mobile phone in the unfolded state provided in this embodiment.

[0061] Figure 5 It is a schematic structural diagram of the inner folding screen mobile phone in the folded state provided in this embodiment.

[0062] As Figures 3 to 5 shown, the rotating structure 12 may include a plurality of rotating components 121. Along the Y-axis direction, the plurality of rotating components 121 are arranged at intervals, and the structure of each rotating component 121 is the same, and its specific setting position can be determined according to the actual situation.

[0063] The first housing 111 and the second housing 112 are located on both sides of the rotating structure 12, and the rotating structure 12 is used to drive the first housing 111 and the second housing 112 to rotate relative to the folding axis.

[0064] Figure 6 It is a schematic structural diagram of the first housing and the second housing in the unfolded state provided in this embodiment.

[0065] As Figure 4 and Figure 6 shown, specifically, the first housing 111 includes a first side 1111, and the first side 1111 is close to the rotating structure 12 and connected to the rotating structure 12. When an external force is applied to the first housing 111 by the user, the first housing 111 will rotate along the rotation axis.

[0066] The second housing 112 includes a second side 1121, and the second side 1121 is close to the rotating structure 12 and connected to the rotating structure 12. When an external force is applied to the second housing 112 by the user, the second housing 112 will rotate along the rotation axis.

[0067] Figure 7 It is a schematic structural diagram of an intermediate state of the inner folding screen mobile phone provided in this embodiment.

[0068] As Figure 7 shown, when the user needs to fold the inner folding screen mobile phone from the unfolded state to the folded state, the user can apply an external force F 外 to the first housing 111 and the second housing 112 with the hand, so that the first housing 111 and the second housing 112 drive the rotating structure 12 to rotate relative to the folding axis.

[0069] Under normal circumstances, the user applies an external force F to the first housing 111 and the second housing 112 外 The position will be at the edge positions of the first housing 111 and the second housing 112, away from the rotating structure 12. At this time, the external force F applied by the user 外 will drive the first housing 111 and the second housing 112 to drive the rotating structure 12 to rotate along their respective rotation axes.

[0070] Figure 8 is a schematic structural diagram of an in-foldable screen mobile phone provided in this embodiment that is about to close to the folded state.

[0071] As Figure 8 shown, when the in-foldable screen mobile phone is in the state of about to be folded, the user can stop applying the external force to the first housing 111 and the second housing 112 or reduce the external force. The cam matching structure inside the rotating structure 12 can apply a closing force Fa to the first housing 111 and the second housing 112 to continue driving the first housing 111 and the second housing 112 to rotate, so as to realize the automatic closing of the first housing 111 and the second housing 112 to the folded state.

[0072] It can be seen that when the first housing 111 and the second housing 112 rotate driven by the closing force Fa applied by the rotating structure 12, the rotating structure 12 can transmit the closing force Fa to the entire first housing 111 and the second housing 112 through the first side 1111 and the second side 1121, so that the first housing 111 and the second housing 112 rotate.

[0073] Figure 9 is a schematic structural diagram of the folded state of an in-foldable screen mobile phone provided in this embodiment.

[0074] As Figure 9 shown, when the in-foldable screen mobile phone is in the closed state, the foldable display screen 20 will generate an unfolding force Fb on the fuselage 10 to restore to the unfolded state. The direction of the unfolding force Fb will drive the first housing 111 and the second housing 112 to have a tendency to move outwards.

[0075] In order to overcome the unfolding force Fb of the foldable display screen 20, the cam matching structure inside the rotating structure 12 will continuously generate a closing force Fa on the first housing 111 and the second housing 112, and the closing force will be greater than the unfolding force Fb of the foldable display screen 20 to maintain the folded state of the in-foldable screen mobile phone.

[0076] When the body 10 is in the folded state, the closing force Fa of the rotating structure 12 will drive the first housing 111 and the second housing 112 to have a tendency to continue to close inward. At this time, since the ends of the first housing 111 and the second housing 112 away from the rotating structure 12 have abutted, the first housing 111 and the second housing 112 cannot continue to rotate. At this time, the long-term action of the closing force Fa will cause the positions where the first housing 111 and the second housing 112 are connected to the rotating structure 12 to deform. The first side 1111 and the second side 1121 will deform along the direction of the closing force Fa under the extrusion of the closing force Fa, resulting in the body 10 forming an over-closed state.

[0077] It can be understood that when the inner-foldable screen mobile phone is about to be folded and in the folded state, the closing force Fa exerted by the cam matching structure inside the rotating structure 12 on the first housing 111 and the second housing 112 is greater than the unfolding force Fb of the foldable display screen 20, so that the inner-foldable screen mobile phone can automatically close to the folded state and maintain the folded state. However, under the long-term action of the closing force Fa, the first housing 111 and the second housing 112 are relatively prone to deformation, affecting the flatness of the body 10.

[0078] Figure 10 is along Figure 5 The partial cross-sectional view in the A-A direction in.

[0079] As Figure 10 As shown, when the inner-foldable screen mobile phone is in the folded state, the first housing 111 and the second housing 112 are stacked, and the middle position of the foldable display screen 20 forms a water-drop fold shape inside the rotating structure 12. There are gaps H between the foldable display screen 20 and the first housing 111 and the second housing 112 in the Z-axis direction respectively, so as to prevent the first housing 111 and the second housing 112 from squeezing the foldable display screen 20 during the rotation process.

[0080] When the first side 1111 and the second side 1121 are deformed, the gap H between the foldable display screen 20 and the first housing 111 and the second housing 112 in the Z-axis direction may decrease, resulting in the first housing 111 and the second housing 112 directly squeezing the foldable display screen 20. When folding or unfolding, the first housing 111 and the second housing 112 will rub the foldable display screen 20, causing abnormal noise on the screen, and even affecting the protective film and reliability of the foldable display screen 20.

[0081] When the first side 1111 or the second side 1121 is deformed, it will affect the reliability of the cooperation and connection between the body 10 and other structures (such as the battery). At the same time, the deformation of the first side 1111 and / or the second side 1121 will also reduce the redundant space of the foldable display screen 20, resulting in increased screen creep, and making the creases and reliability of the whole machine worse.

[0082] In addition, when the inner folding screen mobile phone is in the about-to-fold state and the folded state, the closing force of the rotating structure 12 will continuously act on the fuselage 10. Since the structures of the respective rotating components 121 within the rotating structure 12 are the same, the rotating components 121 at different positions can apply the same closing force to the first housing 111 or the second housing 112. It can be seen that the closing forces received by the first side 1111 or the second side 1121 at different positions are the same. When the structural stiffnesses of the first side 1111 and the second side 1121 are different at different positions, under the action of the same magnitude of closing force, the deformations of the first side 1111 and the second side 1121 at different positions may be different.

[0083] As Figure 6 shown, specifically, with the development of the thinning of the foldable mobile phone 100, the overall thicknesses of the first housing 111 and the second housing 112 are gradually reduced to reduce the thickness of the whole machine. At the same time, the materials of the first housing 111 and the second housing 112 are more lightweight to reduce the weight of the whole machine, which results in the gradual reduction of the structural stiffnesses of the first housing 111 and the second housing 112. When the rotating structure 12 applies a closing force to the first side 1111 and the second side 1121, the deformations of the first side 1111 and the second side 1121 at the positions with weak structural stiffness are larger, affecting the connection reliability between other structures and the first housing 111 and the second housing 112.

[0084] At least one groove 113 is further provided on the first housing 111 and / or the second housing 112, and the groove 113 is used to form a battery compartment to accommodate a battery.

[0085] Exemplarily, the groove 113 can be provided on the first housing 111 or the second housing 112, or can be provided on both the first housing 111 and the second housing 112 at the same time. The setting of the groove structure reduces the material thickness of the first housing 111 and / or the second housing 112 at the position of the groove 113, thereby reducing the structural stiffness of the first housing 111 and / or the second housing 112 near the groove 113.

[0086] Combined with Figure 4 and Figure 6 , under the same closing force applied by the rotating component 121 at each position, at the position where the groove 113 is provided on the first housing 111 and / or the second housing 112, the structural stiffness of the first side 1111 and / or the second side 1121 is further weakened, resulting in the first side 1111 or the second side 1121 being more likely to deform at the position corresponding to the groove 113. In this way, the battery provided in the groove 113 will be squeezed due to the deformation of the first housing 111 and / or the second housing 112, resulting in the battery being prone to falling off, and may also reduce the safety of the battery, affecting the reliability of the battery.

[0087] In addition, at least one through hole 114 may be provided on the first side 1111 or the second side 1121. The through hole 114 is used for threading a flexible circuit board with a shaft. The through hole 114 will also reduce the structural stiffness of the first side 1111 or the second side 1121, resulting in the occurrence of the above problems.

[0088] At the same time, since the overall dimensions of the whole machine in the Y-axis direction are relatively large (such as greater than or equal to 130 mm), combined with the settings of the grooves 113 and the through holes 114 on the first housing 111 and the second housing 112, the structural stiffness of the first side 1111 and the second side 1121 at the middle position is relatively weak, resulting in the first side 1111 and the second side 1121 being more likely to deform at the middle position or having a larger deformation amount at the middle compared to other positions.

[0089] Figure 11 It is a deformation analysis diagram of the second housing of an inner-foldable screen mobile phone provided in this embodiment.

[0090] Figure 11 It is a deformation analysis diagram of the second housing 112 with a battery compartment shown in the figure. The z value in the figure represents the deformation amount of the second side 1121, and the position marked with the z value corresponds to the position with a deformation amount of z. For example, the position marked with z = 0.250 represents that at this position, the deformation amount of the second side 1121 is 0.250 mm.

[0091] As Figure 11 shown, the deformation amount of the second side 1121 of the second housing 112 is larger than that of other positions of the second housing 112. Further, for the second side 1121, the deformation amount at the middle position close to the second side 1121 is the largest, reaching 0.297 mm.

[0092] To solve the above problems, in a first aspect, an embodiment of the present application provides a rotating shaft mechanism 200 applied to a foldable electronic device.

[0093] Figure 12 It is a schematic structural diagram of the unfolded state of a rotating shaft mechanism provided in this embodiment.

[0094] Figure 13 It is a schematic structural diagram of the folded state of a rotating shaft mechanism provided in this embodiment.

[0095] As Figure 12 and Figure 13 shown, the rotating shaft mechanism 200 includes a rotating shaft base 210 and a plurality of rotating modules arranged on the rotating shaft base 210.

[0096] The rotating shaft base 210 is a fixed part, and multiple rotating modules can be used to connect with the middle frame of the foldable electronic device, enabling the middle frame to rotate relative to the rotating shaft base 210.

[0097] The multiple rotating modules include at least one first rotating module 220 and two second rotating modules 230. Among them, along the rotation axis direction of the foldable electronic device, the two second rotating modules 230 are disposed adjacent to both ends of the rotating shaft base 210, and at least one first rotating module 220 is disposed between the two second rotating modules 230. It can be seen that along the Y-axis direction, the two second rotating modules 230 are close to the edge position of the rotating shaft base 210, and the first rotating module 220 is close to the middle position of the rotating shaft base 210.

[0098] It can be understood that the two second rotating modules 230 are disposed adjacent to both ends of the rotating shaft base 210, which may mean that the end of the second rotating module 230 facing the edge of the rotating shaft base 210 is flush with the edge of the rotating shaft base 210, or there is a certain distance between the end of the second rotating module 230 facing the edge of the rotating shaft base 210 and the edge of the rotating shaft base 210. The second rotating module 230 is closer to the end of the rotating shaft base 210 relative to the first rotating module 220. In this embodiment, the specific position of the second rotating module 230 is not limited.

[0099] The interior of each rotating module includes at least one set of abutted friction surfaces, and each set of friction surfaces is used to generate a frictional force that hinders the rotation of the middle frame. Among them, hindering the rotation of the middle frame includes hindering the middle frame from rotating relative to the rotating shaft base 210 and hindering the middle frame from having a tendency to rotate relative to the rotating shaft base 210.

[0100] It is worth noting that the friction surfaces in the first rotating module 220 and the second rotating module 230 can be planar friction surfaces formed by mutually abutted planes, or rolling friction surfaces formed by mutually abutted curved surfaces. In this embodiment, the specific form of the friction surfaces is not limited.

[0101] In the state where the middle frame is about to fold, when the rotating module drives the middle frame to rotate relative to the rotating shaft base 210, the friction surfaces inside the rotating module can provide a sliding frictional force Fc opposite to the rotation direction. The direction of the sliding frictional force Fc is opposite to the closing force Fa applied by the rotating module to the middle frame. The sliding frictional force Fc can reduce the closing force Fa applied by the rotating module to the middle frame, thereby reducing the force on the middle frame, so as to reduce the possibility of deformation of the middle frame 310 during rotation.

[0102] In the folded state of the middle frame, under the action of the unfolding force of the display screen, the rotation module will drive the middle frame to have a rotation tendency relative to the rotation axis base 210. At this time, the friction surface inside the rotation module can provide a static friction force Fc in the direction opposite to the rotation tendency. The direction of the static friction force Fc is opposite to the closing force Fa applied by the rotation module to the middle frame. The static friction force Fc can reduce the closing force Fa applied by the rotation module to the middle frame, thereby reducing the force on the middle frame, so as to reduce the possibility of deformation of the middle frame in the folded state.

[0103] In addition, if the friction surface further includes a rolling friction surface, when the rotation module drives the middle frame to rotate relative to the rotation axis base 210 and when the rotation module drives the middle frame to have a rotation tendency relative to the rotation axis base 210, the rolling friction surface can also provide a rolling friction force for hindering the rotation of the middle frame.

[0104] It can be seen that the friction surface inside the rotation module can provide a friction force Fc in the direction opposite to the closing force Fa, thereby reducing the closing force Fa applied by the rotation module to the middle frame, and thus reducing the force on the middle frame, so as to reduce the possibility of deformation of the middle frame in the folded state.

[0105] The friction force provided by the above-mentioned friction surface can also facilitate the hovering of the middle frame in the middle state, so that the foldable electronic device can be kept in the middle state, thereby improving the use convenience.

[0106] The number of friction surfaces inside the first rotation module 220 is greater than the number of friction surfaces inside the second rotation module 230. The large number of friction surfaces inside the first rotation module 220 can make the sum of the friction forces generated inside the first rotation module 220 larger, so that the closing force applied by the first rotation module 220 to the middle frame is smaller. The small number of friction surfaces inside the second rotation module 230 can make the sum of the friction forces generated inside the second rotation module 230 smaller, so that the closing force applied by the second rotation module 230 to the middle frame is larger.

[0107] It can be understood that the sum of the above-mentioned friction forces can include the sum of the sliding friction force and the static friction force. Among them, the static friction force includes not only the static friction force between the flat friction surfaces, but also the rolling friction force between the rolling friction surfaces.

[0108] It can be seen that when the number of friction surfaces inside the first rotating module 220 is greater than the number of friction surfaces inside the second rotating module 230, the closing force exerted by the first rotating module 220 on the middle frame is less than the closing force exerted by the second rotating module 230 on the middle frame, so that the closing force exerted by the rotating shaft mechanism 200 on the middle frame is reasonably distributed between the first rotating module 220 and the second rotating module 230. At the same time, since the first rotating module 220 is arranged at the position with weak stiffness in the middle, it can reduce the deformation amount of the position with weak stiffness caused by the closing force exerted by the first rotating module 220, and improve the force deformation situation of the middle frame. In this way, the connection reliability between the middle frame and the battery, flexible circuit board, and display screen can be improved, and the possibility of the middle frame rubbing against the display screen can also be reduced, improving the reliability of the display screen.

[0109] Figure 14 It is a diagram for analyzing the deformation of the middle frame of a foldable electronic device to which the rotating shaft mechanism provided in this embodiment is applied.

[0110] As Figure 14 shown, the position with the largest deformation amount of the middle frame 310 deviates from the middle area with weak stiffness, and its maximum deformation amount also drops to 0.251 mm, which is greatly improved compared with Figure 10 0.297 mm in Figure 11 and Figure 14 It can be known that adopting the rotating shaft mechanism 200 provided in this embodiment can effectively improve the deformation situation of the middle frame 310, especially the deformation of the position with weak stiffness in the middle of the middle frame 310, which has a great improvement. In this way, it can help to improve the flatness of the middle frame 310, reduce the influence on the display screen and other connection structures, and improve the reliability of the display screen and the whole machine.

[0111] In addition, the number of friction surfaces inside the first rotating module 220 is greater than the number of friction surfaces inside the second rotating module 230, which can also increase the internal damping force of the rotating shaft mechanism 200, so as to facilitate the realization of the hovering design of the whole machine, and improve the diversity and convenience of the use of the foldable electronic device by users.

[0112] The rotating shaft mechanism 200 provided in this embodiment can utilize the friction surfaces in the first rotating module 220 and the second rotating module 230 to provide damping force, so as to facilitate the realization of the hovering design of the whole machine. At the same time, the number of friction surfaces inside the first rotating module 220 is greater than the number of friction surfaces inside the second rotating module 230, which can realize the reasonable distribution of the closing force exerted on the rotating shaft mechanism 200, so that the closing force provided by the first rotating module 220 is less than the closing force provided by the second rotating module 230, thereby reducing the deformation amount of the middle frame 310 at the position with weak stiffness, improving the connection reliability between the middle frame 310 and each structure, reducing the influence on the display screen, and improving the reliability of the whole machine.

[0113] It should be noted that for the two second rotation modules 230 located at the ends, the number of friction surfaces inside the two second rotation modules 230 can be the same or different, as long as they are both less than the number of friction surfaces inside the first rotation module 220.

[0114] Exemplarily, as Figure 14 shown, the deformation of the middle frame 310 is mainly near one end. At this time, the number of friction surfaces inside the second rotation module 230 near the area with a larger amount of deformation can be increased, so that the number of friction surfaces inside the second rotation modules 230 near both ends is different, further realizing a reasonable distribution of the closing force. In this way, the local deformation amount of the middle frame 310 can be further reduced, and the flatness of the middle frame 310 can be further improved.

[0115] Figure 15 It is a schematic diagram of the cooperation structure between the rotating shaft mechanism and the middle frame provided in this embodiment.

[0116] As Figure 15 shown, Figure 15 the rotating shaft mechanism 200 in

[0117] is arranged on the middle frame 310. The middle frame 310 includes a first middle frame 311 and a second middle frame 312, and the first middle frame 311 and the second middle frame 312 are respectively located on both sides of the rotating shaft mechanism 200.

[0118] It should be noted that the receiving groove 320 can be arranged on a different surface of the middle frame 310 from the rotating shaft mechanism 200. For example, the rotating shaft mechanism 200 can be arranged on the side of the middle frame 310 facing the display screen, and the receiving groove 320 can be arranged on the side of the middle frame 310 facing away from the display screen.

[0119] The middle frame 310 further includes at least one opening 330. The opening 330 is close to the rotating shaft base 210, and the opening 330 is used to arrange a through-shaft flexible circuit board.

[0120] In one implementation, along the folding axis direction, at least one first rotation module 220 is adjacent to the receiving groove 320 and / or the opening 330. Compared with the structural stiffness at other positions, the structural stiffness at the position where the receiving groove 320 and / or the opening 330 are arranged on the middle frame 310 is relatively weak. Arranging the first rotation module 220 near the position with relatively weak structural stiffness can effectively reduce the deformation amount at the position with relatively small stiffness, thereby improving the reliability of the middle frame 310 and the whole machine.

[0121] Exemplarily, the number of the first rotation modules 220 can be one, or multiple, such as two, three, etc.

[0122] When the number of the first rotation modules 220 is one, there are three rotation modules provided on the rotation axis base 210 in total. The three rotation modules can be evenly distributed on the rotation axis base 210. Alternatively, the first rotation module 220 can be closer to the position with weak stiffness of the middle frame 310.

[0123] When the number of the first rotation modules 220 is two, there are four rotation modules provided on the rotation axis base 210 in total. The four rotation modules can be evenly distributed on the rotation axis base 210, or can be arranged at unequal distances. In this embodiment, the number and specific positions of the first rotation modules 220 are not limited.

[0124] It should be noted that when the number of the first rotation modules 220 is two, the number of friction surfaces inside the two first rotation modules 220 can be the same or different, as long as it is greater than the number of friction surfaces inside the second rotation module 230, which is not limited in this embodiment.

[0125] When the structural stiffness of the positions where the two first rotation modules 220 are arranged is different, more friction surfaces can be arranged at the position with weaker structural stiffness, which can help reduce the deformation amount of the middle frame 310 and improve the flatness of the middle frame 310.

[0126] Please refer to Figure 12 、 Figure 13 and Figure 15 In one implementation, the rotation axis mechanism 200 includes at least one first rotation component and two second rotation components. Among them, along the rotation axis direction of the foldable electronic device, the two second rotation components are close to both ends of the rotation axis base 210, and at least one first rotation component is arranged between the two second rotation components.

[0127] The first rotation component includes two first rotation modules 220. The two first rotation modules 220 are symmetrically arranged on both sides of the rotation axis base 210 along the center line of the rotation axis base 210 to respectively connect the first middle frame 311 and the second middle frame 312 located on both sides of the rotation axis base 210, so as to be able to drive the first middle frame 311 and the second middle frame 312 to rotate relative to the rotation axis base 210 respectively.

[0128] The second rotation component includes two second rotation modules 230. The two second rotation modules 230 are symmetrically arranged on both sides of the rotation axis base 210 along the center line of the rotation axis base 210 to respectively connect the first middle frame 311 and the second middle frame 312 located on both sides of the rotation axis base 210, so as to be able to drive the first middle frame 311 and the second middle frame 312 to rotate relative to the rotation axis base 210 respectively.

[0129] Figure 16 FIG. is a schematic structural diagram of a first rotation component provided in this embodiment.

[0130] Figure 17 It is a partial structural decomposition diagram of a first rotating assembly provided by this embodiment.

[0131] As Figure 16 and Figure 17 shown, in one implementation, the first rotating assembly includes two first rotating modules 220 symmetrically arranged along the axis of the rotating shaft base 210. The first rotating module 220 includes a first pin shaft 221, a first swing arm 222, and a first engaging portion 223.

[0132] One end of the first swing arm 222 is used to connect to the middle frame 310, and the other end is used to connect to the first pin shaft 221 to drive the middle frame 310 to rotate with the axis of the first pin shaft 221 as the rotation axis.

[0133] The first pin shaft 221 is connected to the first swing arm 222 and the rotating shaft base 210 to realize the connection between the first swing arm 222 and the rotating shaft base 210.

[0134] Along the axis direction of the first pin shaft 221, the first pin shaft 221 is provided with a first limiting ring 2211. The first limiting ring 2211 is used to limit the position of other structures (such as the first engaging portion 223) sleeved on the first pin shaft 221 to prevent other structures on the first pin shaft 221 from falling off.

[0135] Optionally, the first limiting ring 2211 can be integrally formed on the first pin shaft 221 or sleeved and fixed on the first pin shaft 221, which is not limited in this embodiment.

[0136] The first engaging portion 223 is slidably sleeved on the first pin shaft 221. The first engaging portion 223 is located between the first swing arm 222 and the first limiting ring 2211 and abuts against the first swing arm 222 and the first limiting ring 2211. The first engaging portion 223 is cooperatively connected with the first swing arm 222 and can provide a closing force for pushing the middle frame 310 to automatically close or maintain the folded state.

[0137] When the middle frame 310 is about to fold, the first swing arm 222 swings, and the first pin shaft 221 swings with the first swing arm 222. In this way, the first pin shaft 221 can rotate relative to the rotating shaft base 210 and the first engaging portion 223, so that the abutting surface between the first engaging portion 223 and the first limiting ring 2211 on the first pin shaft 221 forms a first set of friction surfaces, and the sliding friction force opposite to the direction of the closing force generated by the first set of friction surfaces is used to reduce the closing force generated by the cooperative connection between the first engaging portion 223 and the first swing arm 222, and further reduce the closing force applied by the first rotating module 220 to the middle frame 310 during the rotation process.

[0138] When the middle frame 310 is in the folded state, the first swing arm 222 has a swinging tendency, and the first pin shaft 221 has a swinging tendency along with the first swing arm 222. In this way, the first pin shaft 221 can have a rotational tendency relative to the rotating shaft base 210 and the first engaging portion 223, and can utilize the static friction force generated by the first set of friction surfaces, which is opposite to the closing force, to reduce the closing force generated by the engagement connection between the first engaging portion 223 and the first swing arm 222 when there is a tendency of movement, and further reduce the closing force applied by the first rotating module 220 to the middle frame 310 in the folded state.

[0139] Exemplarily, the first swing arm 222 has a first cam structure 2221 facing the first engaging portion 223, and the first cam structure 2221 is sleeved on the first pin shaft 221.

[0140] Optionally, when both the first cam structure 2221 and the shaft hole on the rotating shaft base 210 are circular holes, the first pin shaft 221 can be in a tight fit with the first cam structure 2221, and the first pin shaft 221 and the rotating shaft base 210 are in a clearance fit. In this way, the first cam structure 2221 can remain relatively stationary with the first pin shaft 221, and the first cam structure 2221 drives the first pin shaft 221 to rotate relative to the first swing arm 222.

[0141] Alternatively, a non-circular shaft hole can be provided on the first cam structure 2221, and the shape of the first pin shaft 221 is the same as that of the non-circular shaft hole, so as to realize the clamping of the first pin shaft 221 to drive the first pin shaft 221 to rotate. At this time, a circular shaft hole slightly larger than the maximum outer diameter of the first pin shaft 221 can be provided on the rotating shaft base 210 to facilitate the rotation of the first pin shaft 221 relative to the rotating shaft base 210.

[0142] In one implementation, the first engaging portion 223 includes a first cam bracket 2231, a first elastic member 2232, and a first elastic member bracket 2233. Along the direction of the first cam structure 2221 facing the first limiting ring 2211, the first cam bracket 2231, the first elastic member 2232, and the first elastic member bracket 2233 are sequentially sleeved on the first pin shaft 221.

[0143] A first cam surface is provided on one side of the first cam bracket 2231 facing the first cam structure 2221, and the first cam surface is in engagement connection with the first cam structure 2221 to realize the undulating abutment between the first cam structure 2221 and the first cam bracket 2231.

[0144] A cam mating surface is formed by abutting between the first cam structure 2221 and the first cam bracket 2231, so as to generate a closing force for driving the first swing arm 222 to rotate by using the cam mating surface. At the same time, a rolling friction force can also be generated between the cam mating surfaces. This rolling friction force can hinder the rotation of the first cam structure 2221 relative to the first cam bracket 2231 and can also play a damping role, so as to facilitate the realization of the hovering design of the whole machine.

[0145] When the first swing arm 222 rotates, the first cam structure 2221 will rotate relative to the first cam bracket 2231. Under the elastic force of the first elastic member 2232, the first cam bracket 2231 can slide relative to the first pin shaft 221, but always remains in contact with the first cam structure 2221 to generate a closing force between the first cam structure 2221 and the first cam bracket 2231.

[0146] When the middle frame 310 is about to rotate to the folded state, the first cam structure 2221 will automatically roll along the cam slope under the abutting action of the first elastic member 2232 and the first cam bracket 2231. At this time, the closing force between the first cam structure 2221 and the first cam bracket 2231 can make the middle frame 310 automatically close to the folded state.

[0147] When the middle frame 310 is in the folded state, the unfolding force of the display screen will make the first cam structure 2221 have a tendency to rotate relative to the first cam bracket 2231. At this time, the closing force between the first cam structure 2221 and the first cam bracket 2231 is greater than the unfolding force of the display screen, which can make the middle frame 310 keep the folded state.

[0148] When the first cam structure 2221 drives the first pin shaft 221 to rotate, relative rotation will occur between the first cam bracket 2231 and the first pin shaft 221. When the first cam structure 2221 drives the first pin shaft 221 to have a tendency to rotate, a relative rotation tendency will occur between the first cam bracket 2231 and the first pin shaft 221.

[0149] Optionally, the relative rotation between the first cam bracket 2231 and the first pin shaft 221 can be achieved by the following means:

[0150] In one example, the first cam bracket 2231 can slide relative to the axis of the first pin shaft 221 along the chute on the rotating shaft base 210.

[0151] In another example, the first rotating assembly can include a first connecting member 225. Both ends of the first connecting member 225 are connected to the first cam brackets 2231 symmetrically arranged along the axis of the rotating shaft base 210. In this way, under the limiting action of the first connecting member 225, the two first cam brackets 2231 will not rotate, so that they can rotate relative to the first pin shafts 221 sleeved thereon respectively.

[0152] One end of the first elastic member 2232 is connected to the first cam bracket 2231, and the other end is connected to the first elastic member bracket 2233. Under the limiting action of the first elastic member bracket 2233, the first elastic member 2232 can deform along the axis of the first pin shaft 221. When the contact state between the first cam structure 2221 and the cam of the first cam surface changes, the distance between the first cam bracket 2231 and the first cam structure 2221 also changes, resulting in the deformation of the first elastic member 2232. When relative movement occurs between the first cam structure 2221 and the first cam bracket 2231, the deformation of the first elastic member 2232 can maintain the contact between the first cam structure 2221 and the first cam surface, facilitating the generation of the closing force between the first cam bracket 2231 and the first cam structure 2221.

[0153] In this way, when the first cam structure 2221 and the first cam bracket 2231 move relative to each other, the elastic force generated by the first elastic member 2232 can cause the first cam structure 2221 to rotate relative to the first cam bracket 2231, thereby generating a closing force to push the first swing arm 222. In addition, the cam mating surfaces of the first cam structure 2221 and the first cam bracket 2231 can also generate a certain rolling friction force. The rolling friction force can reduce the closing force, facilitating the implementation of the hovering design.

[0154] It should be noted that the above-mentioned first elastic member 2232 can be a spring, a spring sheet or other structures capable of elastic deformation, which is not limited in this embodiment.

[0155] The first elastic member bracket 2233 abuts against the first limiting ring 2211. When the first swing arm 222 swings, the first elastic member bracket 2233 can rotate relative to the first limiting ring 2211.

[0156] When the first swing arm 222 rotates, the first cam structure 2221 drives the first pin shaft 221 to rotate relative to the first elastic member bracket 2233, enabling the contact surface between the first elastic member bracket 2233 and the first limiting ring 2211 to form a first set of friction surfaces. The first set of friction surfaces between the first elastic member bracket 2233 and the first limiting ring 2211 can generate a sliding friction force opposite to the closing force. The sliding friction force can reduce the closing force generated by the cooperation between the first cam structure 2221 and the first cam bracket 2231, thereby reducing the closing force that the first rotation module 220 can apply to the middle frame 310, and further reducing the deformation amount of the middle frame 310 at the connection position with the first rotation module 220, improving the reliability of the middle frame 310 and the overall structure of the machine.

[0157] When the first swing arm 222 has a tendency to rotate, the first cam structure 2221 drives the first pin shaft 221 to have a tendency to rotate relative to the first elastic member bracket 2233. The first set of friction surfaces between the first elastic member bracket 2233 and the first limiting ring 2211 can generate static friction force opposite to the closing force. The static friction force can reduce the closing force generated when the first cam structure 2221 and the first cam bracket 2231 have a relative motion tendency, thereby reducing the closing force that the first rotation module 220 can apply to the middle frame 310, and further reducing the deformation amount of the middle frame 310 at the connection position with the first rotation module 220, improving the reliability of the middle frame 310 and the overall machine structure.

[0158] Wherein, the rotational setting of the first elastic member bracket 2233 relative to the first pin shaft 221 can refer to the structural setting of the above-mentioned first cam bracket 2231, which will not be elaborated here.

[0159] In one implementation, the first rotation module 220 further includes a friction plate bracket 226 and a first friction plate 227.

[0160] The first friction plate 227 and the friction plate bracket 226 are sleeved on the first pin shaft 221. Along the direction of the first mating portion 223 towards the first limiting ring 2211, the first friction plate 227 and the friction plate bracket 226 are sequentially arranged between the first elastic member bracket 2233 and the first limiting ring 2211.

[0161] When the first swing arm 222 rotates, the first pin shaft 221 can drive the first friction plate 227 to rotate relative to the friction plate bracket 226 and the first elastic member bracket 2233, enabling the contact surface between the first friction plate 227 and the first elastic member bracket 2233 to form a second set of friction surfaces, the contact surface between the first friction plate 227 and the friction plate bracket 226 to form a third set of friction surfaces, and the contact surface between the friction plate bracket 226 and the first limiting ring 2211 to form a fourth set of friction surfaces. Thus, the sliding friction force opposite to the direction of the closing force can be generated by using the above-mentioned second set of friction surfaces, third set of friction surfaces, and fourth set of friction surfaces, increasing the total sum of the sliding friction force to further reduce the closing force that the first rotation module 220 can apply to the middle frame 310.

[0162] When the first swing arm 222 has a tendency to rotate, the first pin shaft 221 can drive the first friction plate 227 to have a tendency to rotate relative to the friction plate bracket 226 and the first elastic member bracket 2233. At this time, the static friction force opposite to the direction of the closing force can be generated by using the above-mentioned second set of friction surfaces, third set of friction surfaces, and fourth set of static friction surfaces, increasing the total sum of the static friction force to further reduce the closing force that the first rotation module 220 can apply to the middle frame 310.

[0163] It can be seen that by setting the first friction plate 227 and the friction plate bracket 226, the number of friction surfaces between the first engaging portion 223 and the first limiting ring 2211 can be increased, and the total frictional force can be improved, so that the closing force between the first cam structure 2221 and the first cam bracket 2231 can be further reduced, so as to further reduce the closing force applied by the first rotating module 220 to the middle frame 310, and further reduce the deformation amount near the connection position between the middle frame 310 and the first rotating module 220, and improve the reliability of the middle frame 310 and the whole machine. The first friction plate 227 and the friction plate bracket 226 can also increase the damping force inside the first rotating module 220, which is convenient for realizing the design of the whole machine hovering.

[0164] Among them, the rotational setting of the friction plate bracket 226 relative to the first pin shaft 221 can refer to the structural settings of the above-mentioned first cam bracket 2231 and the first elastic member bracket 2233, which will not be elaborated here.

[0165] In one implementation, the first pin shaft 221 further includes a first card slot 2212, and along the axial direction of the first pin shaft 221, the first card slot 2212 is far from the first limiting ring 2211.

[0166] The first rotating module 220 further includes a first snap ring 224, and the first snap ring 224 is connected to the first card slot 2212. In this way, the first swing arm 222 and the first engaging portion 223 can be arranged between the first snap ring 224 and the first limiting ring 2211, so as to prevent the first swing arm 222 and the first engaging portion 223 from slipping off the first pin shaft 221.

[0167] In addition, when the middle frame 310 is about to be folded, the first swing arm 222 drives the first pin shaft 221 to rotate, and the first snap ring 224 can rotate relative to the first pin shaft 221. At this time, a set of sliding friction surfaces can be formed on the abutting surface between the first swing arm 222 and the first snap ring 224, so as to utilize the sliding friction surfaces to generate sliding frictional force, further reduce the closing force generated by the cooperation between the first engaging portion 223 and the first swing arm 222, reduce the deformation amount of the middle frame 310, and improve the reliability of the middle frame 310 and the whole machine.

[0168] When the middle frame 310 is in the folded state, the first swing arm 222 has a tendency to drive the first pin shaft 221 to rotate, and the first snap ring 224 remains stationary. At this time, a set of static friction surfaces can be formed on the abutting surface between the first swing arm 222 and the first snap ring 224, so as to utilize the static friction surfaces to generate static frictional force, further reduce the closing force generated by the cooperation between the first engaging portion 223 and the first swing arm 222 when they have a relative motion tendency, reduce the deformation amount of the middle frame 310, and improve the reliability of the middle frame 310 and the whole machine.

[0169] In one implementation, the first rotation module 220 further includes a second friction plate 228. The second friction plate 228 is sleeved on the first pin shaft 221 and is located between the first swing arm 222 and the second friction plate 228.

[0170] When the first swing arm 222 rotates, the first pin shaft 221 can drive the second friction plate 228 to rotate relative to the first snap spring 224, so that the contact surface between the second friction plate 228 and the first snap spring 224 forms a fifth set of friction surfaces, and a sliding friction force opposite to the direction of the closing force is generated on the fifth set of friction surfaces.

[0171] When the first swing arm 222 has a tendency to rotate, the first pin shaft 221 can drive the second friction plate 228 to have a tendency to rotate relative to the first snap spring 224. At this time, the fifth set of friction surfaces can generate a static friction force opposite to the direction of the closing force.

[0172] In this way, the sliding friction force or static friction force between the second friction plate 228 and the first snap spring 224 can be used to further reduce the closing force between the first cam structure 2221 and the first cam bracket 2231, so as to further reduce the closing force applied by the first rotation module 220 to the middle frame 310, and further reduce the deformation amount near the connection position between the middle frame 310 and the first rotation module 220, thereby improving the reliability of the middle frame 310 and the whole machine.

[0173] In one example, the first swing arm 222 has a first plane facing the second friction plate 228, and the second friction plate 228 abuts against the first plane.

[0174] When the first swing arm 222 rotates, the first pin shaft 221 can drive the second friction plate 228 to rotate relative to the first plane, so that the contact surface between the second friction plate 228 and the first plane forms a seventh set of friction surfaces, and a sliding friction force opposite to the direction of the closing force is generated on the seventh set of friction surfaces.

[0175] When the first swing arm 222 has a tendency to rotate, the first pin shaft 221 can drive the second friction plate 228 to have a tendency to rotate relative to the first plane. At this time, the seventh set of friction surfaces can generate a static friction force opposite to the direction of the closing force.

[0176] In this way, the number of friction surfaces can be further increased, the total friction force can be improved, the closing force can be reduced, so as to reduce the deformation of the middle frame 310, improve the reliability of the middle frame 310 and the whole machine, and at the same time improve the damping force, which is convenient for realizing the hovering design of the whole machine.

[0177] In another example, the first rotation module 220 further includes a second cooperation part 229 cooperating with the first swing arm 222. The second cooperation part 229 is slidably sleeved on the first pin shaft 221 and is located between the first swing arm 222 and the second friction plate 228.

[0178] When the first swing arm 222 rotates, the first pin shaft 221 can drive the second friction plate 228 to rotate relative to the second mating portion 229, so that the abutting surface of the second friction plate 228 and the second mating portion 229 forms a sixth set of friction surfaces, and a sliding friction force opposite to the direction of the closing force is generated on the sixth set of friction surfaces.

[0179] When the first swing arm 222 has a tendency to rotate, the first pin shaft 221 can drive the second friction plate 228 to have a tendency to rotate relative to the second mating portion 229. At this time, the sixth set of friction surfaces can generate a static friction force opposite to the direction of the closing force.

[0180] In this way, the number of friction surfaces can be further increased, the total friction force can be increased, the closing force can be reduced, so as to reduce the deformation of the middle frame 310, improve the reliability of the middle frame 310 and the whole machine, and at the same time increase the damping force, which is convenient for realizing the hovering design of the whole machine.

[0181] Specifically, the first swing arm 222 has a second cam structure 2222 facing the second mating portion 229, and the second cam structure 2222 is sleeved on the first pin shaft 221.

[0182] The second mating portion 229 includes a second cam bracket 2291. A second cam surface is provided on one side of the second cam bracket 2291 facing the second cam structure 2222, and the second cam surface is in mating connection with the second cam structure 2222.

[0183] The second cam structure 2222 can drive the first pin shaft 221 to rotate relative to the second cam bracket 2291, so that the abutting surface of the second cam structure 2222 and the second cam bracket 2291 forms a cam mating surface.

[0184] In this way, the rolling friction surface generated by the cam mating surface can be used to provide damping force, which is convenient for reducing the deformation of the middle frame 310 and improving the reliability of the middle frame 310 and the whole machine. At the same time, the rolling friction surface is convenient for realizing the hovering design of the whole machine.

[0185] At the same time, since the first pin shaft 221 can slide along the axial direction relative to the first cam structure 2221 and the second cam structure 2222, the distance between the second cam structure 2222 and the second cam bracket 2291 can be changed. The cam mating surface of the second cam structure 2222 and the second cam bracket 2291 can also provide a closing force to avoid the problem that it is difficult for the first swing arm 222 to rotate relative to the rotating shaft base 210 due to excessive damping force.

[0186] Figure 18 It is a schematic structural diagram of a second rotating assembly provided in this embodiment.

[0187] Figure 19 It is a partial structural exploded view of a second rotating assembly provided in this embodiment.

[0188] As Figure 18 and Figure 19 shown, in one implementation, the second rotating assembly includes two second rotating modules 230 symmetrically arranged along the axis of the rotating shaft base 210. The second rotating module 230 includes a second pin shaft 231, a second swing arm 232, and a third engaging portion 233.

[0189] One end of the second swing arm 232 is used to connect to the middle frame 310, and the other end is used to connect to the second pin shaft 231 to drive the middle frame 310 to rotate with the axis of the second pin shaft 231 as the rotation axis.

[0190] The second pin shaft 231 is connected to the second swing arm 232 and the rotating shaft base 210 to realize the connection between the second swing arm 232 and the rotating shaft base 210.

[0191] Along the axis direction of the second pin shaft 231, a second limiting ring 2311 is arranged on the second pin shaft 231. The second limiting ring 2311 is used to limit the position of the structure sleeved on the second pin shaft 231 to prevent the structure on the second pin shaft 231 from falling off. The second limiting ring 2311 can be integrally formed on the second pin shaft 231 or sleeved and fixed on the second pin shaft 231, which is not limited in this embodiment.

[0192] The third engaging portion 233 is slidably sleeved on the second pin shaft 231. The third engaging portion 233 is located between the second swing arm 232 and the second limiting ring 2311 and abuts against the second swing arm 232 and the second limiting ring 2311. The third engaging portion 233 is connected and cooperated with the second swing arm 232 to provide a closing force for pushing the middle frame 310.

[0193] When the second swing arm 232 swings, the second pin shaft 231 rotates relative to the second swing arm 232. In this way, there is no relative rotation between the second pin shaft 231 and the rotating shaft base 210, and between the second pin shaft 231 and the third engaging portion 233, and there is no friction surface between the third engaging portion 233 and the second limiting ring 2311. As a result, the number of friction surfaces inside the second rotating module 230 is less than the number of friction surfaces inside the first rotating module 220, so that the closing force provided by the second rotating module 230 is greater than the closing force provided by the first rotating module 220. In this way, while reducing the closing force of the first rotating module 220, the closing force of the second rotating module 230 can be ensured, so as to ensure that the total closing force that the rotating shaft mechanism 200 can generate on the middle frame 310 remains unchanged. Thus, when the middle frame 310 can be automatically closed or unfolded, the deformation amount of the middle frame 310 can be reduced, and the reliability of the middle frame 310 and the whole machine can be improved.

[0194] In one implementation, the second pin shaft 231 further includes a second card slot 2312, and along the axial direction of the second pin shaft 231, the card slot is away from the second limiting ring 2311.

[0195] The second rotating module 230 further includes a second circlip 234, and the second circlip 234 is engaged with the second card slot 2312. In this way, the second swing arm 232 and the third engaging portion 233 can be disposed between the second circlip 234 and the second limiting ring 2311, thereby preventing the second swing arm 232 and the third engaging portion 233 from slipping off the second pin shaft 231.

[0196] Exemplarily, the second swing arm 232 has a third cam structure 2321 facing the third engaging portion 233, and the third cam structure 2321 is sleeved on the second pin shaft 231.

[0197] In one implementation, the third engaging portion 233 includes a third cam bracket 2331, a second elastic member 2332, and a second elastic member bracket 2333. Along the direction of the third cam structure 2321 facing the second limiting ring 2311, the third cam bracket 2331, the second elastic member 2332, and the second elastic member bracket 2333 are sequentially sleeved on the second pin shaft 231.

[0198] A third cam surface is provided on one side of the third cam bracket 2331 facing the third cam structure 2321, and the third cam surface is in mating connection with the third cam structure 2321 to achieve the undulating abutment between the third cam structure 2321 and the third cam bracket 2331.

[0199] A cam mating surface is formed by abutting between the third cam structure 2321 and the third cam bracket 2331 to generate a closing force for driving the second swing arm 232 to rotate by using the cam mating surface. At the same time, a rolling friction force can also be generated between the cam mating surfaces, and the rolling friction force can hinder the rotation of the third cam structure 2321 relative to the third cam bracket 2331, thereby playing a damping role to facilitate the implementation of the overall machine hovering design.

[0200] One end of the second elastic member 2332 is connected to the third cam bracket 2331, and the other end is connected to the second elastic member bracket 2333. Under the restrictive action of the second elastic member bracket 2333, the second elastic member 2332 can deform along the axis of the second pin shaft 231. When the contact state between the third cam structure 2321 and the cam of the third cam surface changes, the distance between the third cam bracket 2331 and the third cam structure 2321 also changes, resulting in the deformation of the second elastic member 2332. When the third cam structure 2321 and the third cam bracket 2331 move relative to each other, the deformation of the second elastic member 2332 can maintain the contact between the third cam structure 2321 and the third cam surface, thereby facilitating the generation of a closing force on the contact surface between the third cam structure 2321 and the third cam surface.

[0201] In this way, when the third cam structure 2321 and the third cam bracket 2331 move relative to each other, the elastic force generated by the second elastic member 2332 can cause the third cam structure 2321 to rotate relative to the third cam bracket 2331, thereby generating a closing force to push the second swing arm 232. In addition, the cam mating surface between the third cam structure 2321 and the third cam bracket 2331 can not only provide a closing force to push the second swing arm 232 to rotate, but also generate a certain damping force, which is convenient for realizing the hover design.

[0202] In one implementation, the inclined surface angle of the first cam structure 2221 is smaller than the inclined surface angle of the third cam structure 2321.

[0203] Figure 20 It is a force analysis diagram between the cam mating surfaces provided in this embodiment.

[0204] Taking the mating connection of the cam mating surfaces of the first cam structure 2221 and the first cam bracket 2231 as an example, Figure 20 The meshing schematic diagram in the unfolded state of the cam surfaces of the first cam structure 2221 and the first cam bracket 2231 is shown. Here, the unfolding refers to the unfolding of the cam mating surface, rather than the unfolding of the foldable electronic device.

[0205] Combined with Figure 20It can be known that the force on the contact surface between the first cam structure 2221 and the first cam bracket 2231 is F1. When the slope angle of the inclined surface of the first cam structure 2221 is small, the component force F1x of the force F1 used to push the first cam structure 2221 to rotate will become smaller, and the rolling friction force between the first cam structure 2221 and the first cam bracket 2231 will become larger. In this way, the closing force that the first rotation module 220 can provide will be smaller than the closing force that the second rotation module 230 can provide, so that the overall closing force of the rotating shaft mechanism 200 can be reasonably distributed between the first rotation module 220 and the second rotation module 230. On the premise of realizing the automatic pushing of the middle frame 310, the deformation amount of the weak stiffness position of the middle frame 310 can be reduced, and the reliability of the middle frame 310 and the whole machine can be improved.

[0206] Furthermore, when the rotating shaft mechanism 200 is in the folded state, the elastic force of the first elastic member 2232 is smaller than the elastic force of the second elastic member 2332.

[0207] As Figure 20 it can be known, when the elastic force of the first elastic member 2232 is small, the force F2 exerted by the first elastic member 2232 on the first cam bracket 2231 will decrease. The force F2 exerted by the first elastic member 2232 on the first cam bracket 2231 is equal to the force F1 on the contact surface between the first cam structure 2221 and the first cam bracket 2231, so that the component force F1x of the force F1 decreases. In this way, the closing force that the first rotation module 220 can provide will be smaller than the closing force that the second rotation module 230 can provide, so that the overall closing force of the rotating shaft mechanism 200 can be reasonably distributed between the first rotation module 220 and the second rotation module 230. On the premise of realizing the automatic pushing of the middle frame 310, the deformation amount of the weak stiffness position of the middle frame 310 can be reduced, and the reliability of the middle frame 310 and the whole machine can be improved.

[0208] In an example, when both the first elastic member 2232 and the second elastic member 2332 are springs, when the rotating shaft mechanism 200 is in the folded state and the pre-compression amounts of the first elastic member 2232 and the second elastic member 2332 are the same, the elastic coefficients of the first elastic member 2232 and the second elastic member 2332 can be adjusted. By making the elastic coefficient of the first elastic member 2232 smaller than the elastic coefficient of the second elastic member 2332, the elastic force of the first elastic member 2232 is smaller than the elastic force of the second elastic member 2332.

[0209] Specifically, it can be achieved by adjusting the number of spring coils, outer diameter of the spring, spring helix angle, hardness of the spring material, spring processing technology, etc. of the first elastic member 2232 and the second elastic member 2332, which is not limited in this embodiment.

[0210] In another example, when both the first elastic member 2232 and the second elastic member 2332 are springs, when the rotating shaft mechanism 200 is in the folded state and the elastic coefficients of the first elastic member 2232 and the second elastic member 2332 are the same, the pre-compression amounts of the first elastic member 2232 and the second elastic member 2332 can be adjusted. By making the pre-compression amount of the first elastic member 2232 less than that of the second elastic member 2332, the elastic force of the first elastic member 2232 is made less than the elastic force of the second elastic member 2332.

[0211] Please refer to again Figure 18 and Figure 19 , the second elastic member bracket 2333 abuts against the second limiting ring 2311, and there is no relative rotation between the second elastic member bracket 2333 and the second limiting ring 2311. In this way, a friction surface is not formed on the abutting surface between the second elastic member bracket 2333 and the second limiting ring 2311, so that the number of friction surfaces inside the second rotating module 230 is less than the number of friction surfaces inside the first rotating module 220, ensuring the closing force of the second rotating module 230, so as to ensure that the total closing force generated by the rotating shaft mechanism 200 on the middle frame 310 remains unchanged. Thus, when the middle frame 310 can be automatically closed or unfolded, the deformation amount of the middle frame 310 can be reduced, and the reliability of the middle frame 310 and the whole machine can be improved.

[0212] The second rotating module 230 further includes a fourth engaging portion 235 that cooperates with the second swing arm 232. The fourth engaging portion 235 is slidably sleeved on the second pin shaft 231 and is located between the second swing arm 232 and the second snap ring 234.

[0213] Specifically, the second swing arm 232 has a fourth cam structure 2322 facing the fourth engaging portion 235, and the fourth cam structure 2322 is sleeved on the second pin shaft 231.

[0214] The fourth engaging portion 235 includes a fourth cam bracket 2351. A fourth cam surface is provided on one side of the fourth cam bracket 2351 facing the fourth cam structure 2322, and the fourth cam surface is cooperatively connected with the fourth cam structure 2322.

[0215] The fourth cam structure 2322 can rotate relative to the fourth cam bracket 2351, so that the abutting surface between the fourth cam structure 2322 and the fourth cam bracket 2351 forms a cam mating surface.

[0216] In this way, the rolling friction surface generated by the cam mating surface can be used to provide a damping force, which is convenient for reducing the deformation of the middle frame 310, improving the reliability of the middle frame 310 and the whole machine, and at the same time increasing the damping force, which is convenient for realizing the hovering design of the whole machine to realize the hovering design of the whole machine.

[0217] Meanwhile, since the second pin shaft 231 can slide relative to the third cam structure 2321 and the fourth cam structure 2322 in the axial direction, the distance between the fourth cam structure 2322 and the fourth cam bracket 2351 can be changed. The cam mating surfaces of the fourth cam structure 2322 and the fourth cam bracket 2351 can also provide a closing force to prevent excessive damping force and avoid the problem of difficult rotation of the second swing arm 232 relative to the rotating shaft base 210.

[0218] In one implementation, a gear meshing portion 2323 is further provided on the circumferential side surface of the third cam structure 2321.

[0219] The second rotating module 230 further includes a synchronous gear 236. The synchronous gear 236 is rotatably connected between the rotating shaft base 210 and the third cam bracket 2331, and the synchronous gear 236 is meshed with the gear meshing portion 2323. Meanwhile, in the second rotating assembly, two synchronous gears 236 symmetrically arranged along the axis of the rotating shaft base 210 are meshed with each other. In this way, the third cam structure 2321 can drive the synchronous gear 236 to rotate synchronously, so that the second swing arms 232 located on both sides of the rotating shaft base 210 can rotate relative to the rotating shaft base 210 simultaneously, so as to realize the symmetry of the rotation of the middle frame 310, facilitate the balance of the closing forces on both sides of the rotating shaft base 210, and thus facilitate the maintenance of the smoothness of the rotation of the middle frame 310.

[0220] Further, the second pin shaft 231 includes a first shaft section 2313 and a second shaft section 2314.

[0221] The third cam bracket 2331, the second elastic member 2332 and the second elastic member bracket 2333 are sleeved on the first shaft section 2313. The third cam structure 2321 is sleeved on the second shaft section 2314. The shaft diameter of the second shaft section 2314 is smaller than that of the first shaft section 2313. In this way, more space can be provided for the setting of the gear meshing portion 2323 on the third cam structure 2321, thus avoiding poor structural strength of the gear meshing portion 2323 due to insufficient space, which affects the smoothness and reliability of gear transmission.

[0222] In summary, the rotating shaft mechanism 200 provided by the present application adjusts the relationship between the number of friction surfaces inside the first rotating module 220 and the second rotating module 230, adjusts the relationship between the inclined surface angles of the first cam structure 2221 in the first rotating module 220 and the inclined surface angles of the third cam structure 2321 in the second rotating module 230, and the relationship between the elastic coefficients of the first elastic member 2232 and the second elastic member 2332, etc., to adjust the relationship between the closing forces that the first rotating module 220 and the second rotating module 230 located at different positions on the rotating shaft base 210 can generate on the middle frame 310. The above means can make the total closing force that the two second rotating modules 230 can generate greater than the total closing force generated by at least one first rotating module 220. For example, when there is only one first rotating module 220, the closing force that the first rotating module 220 can generate is 30% of the total closing force, the closing force that the second rotating module 230 can generate is 35% of the total closing force, and the closing force that the two second rotating modules 230 can generate is 70% of the total closing force, so as to realize the reasonable distribution of the closing force of the rotating shaft mechanism 200 at different positions. In this way, while ensuring that the rotating shaft mechanism 200 can achieve the automatic closing of the middle frame 310, it can also reduce the deformation amount of the middle frame 310 at the position with weak stiffness, and improve the reliability of the middle frame 310, the cooperation connection between the middle frame 310 and other structures, and the whole machine.

[0223] It can be understood that the above various means for adjusting the magnitude of the closing force generated by the first rotating module 220 and the second rotating module 230 can be used separately or in combination, and are not specifically limited in this embodiment.

[0224] Figure 21 It is a schematic structural diagram of an electronic device provided in this embodiment.

[0225] As Figure 21 shown, in the second aspect, this embodiment provides an electronic device 300. The electronic device 300 is foldable and includes: a middle frame 310 and the rotating shaft mechanism 200 provided in any of the foregoing embodiments.

[0226] The rotating shaft mechanism 200 includes at least one first rotating component and two second rotating components; wherein, along the rotation axis direction of the foldable electronic device 300, the two second rotating components are disposed close to both ends of the rotating shaft base 210, and at least one first rotating component is disposed between the two second rotating components; the first rotating component includes two first rotating modules 220, and the two first rotating modules 220 are symmetrically disposed on both sides of the rotating shaft base 210 along the center line of the rotating shaft base 210; the second rotating component includes two second rotating modules 230, and the two second rotating modules 230 are symmetrically disposed on both sides of the rotating shaft base 210 along the center line of the rotating shaft base 210.

[0227] The middle frame 310 includes a first middle frame 311 and a second middle frame 312. The first middle frame 311 is connected to the first rotation module 220 and the second rotation module 230 on the same side of the rotation shaft base 210, and the second middle frame 312 is connected to the first rotation module 220 and the second rotation module 230 on the other side of the rotation shaft base 210.

[0228] It can be understood that the above-provided electronic device applies the rotation shaft mechanism provided above. Therefore, the beneficial effects it can achieve can refer to the beneficial effects in the rotation shaft mechanism provided above, which will not be elaborated here.

[0229] It should be noted that those skilled in the art will readily think of other implementation manners of this application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application, which follow the general principles of this application and include the common general knowledge or conventional technical means in the technical field not disclosed in this application. The specification and the embodiments are only regarded as exemplary, and the true scope of this application is pointed out by the claims.

[0230] It should be understood that this application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is only limited by the appended claims.

Claims

1. A rotating shaft mechanism, It is characterized in that Applied to foldable electronic devices, the hinge mechanism includes: A rotating shaft base (210); A plurality of rotating modules are arranged on the rotating shaft base (210), and the plurality of rotating modules are used to be connected to a middle frame (310) of the foldable electronic device, so that the middle frame (310) can rotate relative to the rotating shaft base (210); The plurality of rotating modules include: at least one first rotating module (220) and two second rotating modules (230); wherein, along the rotation axis direction of the foldable electronic device, the two second rotating modules (230) are close to two ends of the rotating shaft base (210), and the at least one first rotating module (220) is arranged between the two second rotating modules (230); Each of the rotating modules comprises at least one set of friction surfaces that abut against each other; each set of friction surfaces is used to generate a friction force that hinders the rotation of the middle frame (310); Wherein, the number of the friction surfaces inside the first rotating module (220) is greater than the number of the friction surfaces inside the second rotating module (230).

2. The rotating shaft mechanism according to claim 1, It is characterized in that The middle frame (310) is provided with at least one accommodating groove (320), and the accommodating groove (320) is used to accommodate a battery; At least one opening (330) is also provided at a position of the middle frame (310) close to the rotating shaft base (210), and the opening (330) is used to set a through-shaft flexible circuit board; Along the folding axis direction, the at least one first rotating module (220) is adjacent to the receiving groove (320) and / or the opening (330).

3. The rotating shaft mechanism according to claim 1 or 2, It is characterized in that The first rotating module (220) comprises a first pin shaft (221), a first swing arm (222) and a first matching portion (223); The first pin shaft (221) is connected to the first swing arm (222) and the rotating shaft base (210); The first pin shaft (221) is provided with a first limiting ring (2211); The first matching portion (223) can be slidably sleeved on the first pin shaft (221) along the axial direction of the first pin shaft (221); the first matching portion (223) is located between the first swing arm (222) and the first limiting ring (2211), and abuts against the first swing arm (222) and the first limiting ring (2211); The abutting surfaces of the first matching portion (223) and the first limiting ring (2211) form a first set of friction surfaces; The first group of friction surfaces is used to provide sliding friction when the first swing arm (222) drives the first pin shaft (221) to rotate relative to the rotating shaft base (210) and the first matching portion (223); The first group of friction surfaces is also used to provide static friction when the first swing arm (222) drives the first pin shaft (221) to have a rotational tendency relative to the rotating shaft base (210) and the first matching portion (223).

4. The rotating shaft mechanism according to claim 3, It is characterized in that The first rotating module (220) further comprises a friction plate bracket (226) and a first friction plate (227); The first friction plate (227) and the friction plate bracket (226) are sleeved on the first pin shaft (221), and along the direction from the first matching portion (223) toward the first limiting ring (2211), the first friction plate (227) and the friction plate bracket (226) are sequentially arranged between the first matching portion (223) and the first limiting ring (2211); The abutting surfaces of the first friction plate (227) and the first matching portion (223) form a second group of friction surfaces, the abutting surfaces of the first friction plate (227) and the friction plate bracket (226) form a third group of friction surfaces, and the abutting surfaces of the friction plate bracket (226) and the first limiting ring (2211) form a fourth group of friction surfaces; The second group of friction surfaces, the third group of friction surfaces and the fourth group of friction surfaces are used to provide sliding friction when the first pin shaft (221) drives the first friction plate (227) to rotate relative to the friction plate bracket (226) and the first matching portion (223); The second group of friction surfaces, the third group of friction surfaces and the fourth group of friction surfaces are also used to provide static friction when the first pin shaft (221) drives the first friction plate (227) to have a rotational tendency relative to the friction plate bracket (226) and the first matching portion (223).

5. The rotating shaft mechanism according to claim 3, It is characterized in that The first pin shaft (221) is also provided with a first clamping groove (2212), and along the axial direction of the first pin shaft (221), the first clamping groove (2212) is away from the first limiting ring (2211); The first rotating module (220) further includes a first clamping spring (224) and a second friction plate (228); The first clamping spring (224) is clamped in the first clamping slot (2212); The second friction plate (228) is sleeved on the first pin shaft (221) and is located between the first retaining spring (224) and the first swing arm (222); The abutting surfaces of the second friction plate (228) and the first clamping spring (224) form a fifth set of friction surfaces; The fifth group of friction surfaces is used to provide sliding friction when the first pin shaft (221) drives the second friction plate (228) to rotate relative to the first clamping spring (224); The fifth group of friction surfaces is also used to provide static friction when the first pin shaft (221) drives the second friction plate (228) to have a rotational tendency relative to the first clamping spring (224).

6. The rotating shaft mechanism according to claim 5, It is characterized in that The first rotating module (220) further comprises a second matching portion (229) matchedly connected to the first swing arm (222); The second matching portion (229) can be slidably sleeved on the first pin shaft (221) and is located between the first swing arm (222) and the second friction plate (228); The abutting surface of the second friction plate (228) and the second matching portion (229) forms a sixth group of friction surfaces; The sixth group of friction surfaces is used to provide sliding friction when the first pin shaft (221) drives the second friction plate (228) to rotate relative to the second matching portion (229); The sixth group of friction surfaces is also used to provide static friction when the first pin shaft (221) drives the second friction plate (228) to have a rotational tendency relative to the second matching portion (229).

7. The rotating shaft mechanism according to claim 5, It is characterized in that The first swing arm (222) has a first plane facing the second friction plate (228); The second friction plate (228) abuts against the first plane; The abutting surface of the second friction plate (228) and the first plane forms a seventh set of friction surfaces; The seventh group of friction surfaces is used to provide sliding friction when the first pin shaft (221) drives the second friction plate (228) to rotate relative to the first plane; The seventh group of friction surfaces is also used to provide static friction when the first pin shaft (221) drives the second friction plate (228) to have a rotational tendency relative to the first plane.

8. The rotating shaft mechanism according to claim 6, It is characterized in that The first swing arm (222) has a first cam structure (2221) facing the first matching portion (223), and the first cam structure (2221) is sleeved on the first pin shaft (221); The first matching portion (223) comprises a first cam bracket (2231), a first elastic member (2232) and a first elastic member bracket (2233); Along the direction from the first cam structure (2221) toward the first limiting ring (2211), the first cam bracket (2231), the first elastic member (2232) and the first elastic member bracket (2233) are sequentially sleeved on the first pin shaft (221); A first cam surface is provided on a side of the first cam bracket (2231) facing the first cam structure (2221), and the first cam surface is cooperatively connected with the first cam structure (2221); The first elastic member bracket (2233) is in abutment with the first limiting ring (2211); The abutting surfaces of the first elastic member bracket (2233) and the first limiting ring (2211) form the first group of friction surfaces; The first group of friction surfaces is used to provide sliding friction when the first cam structure (2221) drives the first pin shaft (221) to rotate relative to the first cam bracket (2231), the first elastic member (2232) and the first elastic member bracket (2233); The first group of friction surfaces is also used to provide static friction when the first cam structure (2221) drives the first pin shaft (221) to have a rotational tendency relative to the first cam bracket (2231), the first elastic member (2232) and the first elastic member bracket (2233).

9. The rotating shaft mechanism according to claim 8, It is characterized in that The first swing arm (222) has a second cam structure (2222) facing the second matching portion (229), and the second cam structure (2222) is sleeved on the first pin shaft (221); The second matching portion (229) includes a second cam bracket (2291); A second cam surface is provided on a side of the second cam bracket (2291) facing the second cam structure (2222), and the second cam surface is cooperatively connected with the second cam structure (2222); The second cam structure (2222) can drive the first pin shaft (221) to rotate relative to the second cam bracket (2291).

10. The rotating shaft mechanism according to claim 8, It is characterized in that The second rotating module (230) comprises a second pin shaft (231), a second swing arm (232) and a third matching portion (233); The second pin shaft (231) is connected to the rotating shaft base (210); The second swing arm (232) has a third cam structure (2321), and the third cam structure (2321) is sleeved on the second pin shaft (231); The second pin shaft (231) is provided with a second limiting ring (2311); The third matching portion (233) comprises a third cam bracket (2331), a second elastic member (2332) and a second elastic member bracket (2333); Along the direction from the third cam structure (2321) toward the second limiting ring (2311), the third cam bracket (2331), the second elastic member (2332) and the second elastic member bracket (2333) are sequentially sleeved on the second pin shaft (231); A third cam surface is provided on a side of the third cam bracket (2331) facing the third cam structure (2321), and the third cam surface is cooperatively connected with the third cam structure (2321); The second elastic member bracket (2333) is in abutment with the second limiting ring (2311); The third cam structure (2321) can rotate relative to the second pin shaft (231) and the third cam bracket (2331); The inclination angle of the inclined surface of the first cam structure (2221) is smaller than the inclination angle of the inclined surface of the third cam structure (2321).

11. The rotating shaft mechanism according to claim 10, It is characterized in that When the rotating shaft mechanism is in a folded state, the elastic force of the first elastic member (2232) is smaller than the elastic force of the second elastic member (2332).

12. The rotating shaft mechanism according to claim 10, It is characterized in that The peripheral side surface of the third cam structure (2321) is also provided with a gear meshing portion (2323); The second rotating module (230) further comprises a synchronous gear (236), wherein the synchronous gear (236) is rotatably connected between the rotating shaft base (210) and the third cam bracket (2331), and the synchronous gear (236) is meshedly connected with the gear meshing portion (2323); The third cam structure (2321) can drive the synchronous gear (236) to rotate synchronously.

13. The rotating shaft mechanism according to claim 12, It is characterized in that The second pin shaft (231) includes a first shaft section (2313) and a second shaft section (2314); The third cam bracket (2331), the second elastic member (2332) and the second elastic member bracket (2333) are sleeved on the first shaft section (2313); The third cam structure (2321) is sleeved on the second shaft section (2314); The shaft diameter of the second shaft section (2314) is smaller than the shaft diameter of the first shaft section (2313).

14. A rotating shaft mechanism, It is characterized in that Applied to foldable electronic devices, the hinge mechanism includes: A rotating shaft base (210); A plurality of rotating modules arranged on the rotating shaft base (210), the plurality of rotating modules being used to be connected to a middle frame (310) of the foldable electronic device so that the middle frame (310) can rotate relative to the rotating shaft base (210); The plurality of rotating modules include: at least one first rotating module (220) and two second rotating modules (230); wherein, along the rotation axis direction of the foldable electronic device, the two second rotating modules (230) are arranged close to the two ends of the rotating shaft base (210), and the at least one first rotating module (220) is arranged between the two second rotating modules (230); Each of the rotating modules includes at least one set of cam mating surfaces abutting against each other; Wherein, the inclination angle of the inclined surface of the cam matching surface inside the first rotating module (220) is smaller than the inclination angle of the inclined surface of the cam matching surface inside the second rotating module (230).

15. The rotating shaft mechanism according to claim 14, It is characterized in that The first rotating module (220) comprises a first elastic member (2232) for providing an elastic abutment force for the cam mating surface; The second rotating module (230) comprises a second elastic member (2332) for providing an elastic abutment force for the cam mating surface; When the rotating shaft mechanism is in a folded state, the elastic force of the first elastic member (2232) is smaller than the elastic force of the second elastic member (2332).

16. An electronic device, It is characterized in that The electronic device comprises: A first middle frame (311), a second middle frame (312), and a rotating shaft mechanism as described in any one of claims 1 to 15; The rotating shaft mechanism comprises at least one first rotating assembly and two second rotating assemblies; wherein, along the rotating axis direction of the foldable electronic device, the two second rotating assemblies are arranged close to the two ends of the rotating shaft base (210), and the at least one first rotating assembly is arranged between the two second rotating assemblies; The first rotating assembly comprises two first rotating modules (220), and the two first rotating modules (220) are symmetrically arranged on both sides of the rotating shaft base (210) along the center line of the rotating shaft base (210); The second rotating assembly comprises two second rotating modules (230), and the two second rotating modules (230) are symmetrically arranged on both sides of the rotating shaft base (210) along the center line of the rotating shaft base (210); The first middle frame (311) is connected to the first rotating module (220) and the second rotating module (230) located on the same side of the rotating shaft base (210); The second middle frame (312) is connected to the first rotating module (220) and the second rotating module (230) located on the other side of the rotating shaft base (210).

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