Hinge mechanism and foldable electronic device

Abstract

The present application provides a hinge mechanism and a foldable electronic device, which relate to the technical field of electronic products. A first damping mechanism in the hinge mechanism is fixed on a first connecting member, and the first damping mechanism cooperates with a first swing arm body to provide a damping force for the rotation of the first swing arm relative to a base. The structure of the first damping mechanism will not be limited by the size of the effective design space of the base, which is conducive to reasonably optimizing the structure of the first damping mechanism according to actual needs, providing the hinge mechanism with a better damping feel and hovering effect, and will not increase the thickness of the base.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a hinge mechanism and a foldable electronic device. Background Art

[0002] With the development of foldable screen technology, foldable electronic devices have become a hot technology. At present, a damping device is usually provided in the hinge mechanism used to realize the foldable function of the electronic device. The damping device is usually installed inside the base of the hinge mechanism. The damping device can provide a damping force for the electronic device during the switching process between the folded state and the unfolded state, so that the electronic device has a damping feel when opening and closing.

[0003] As the demand for electronic devices to be thinner and lighter becomes stronger, the demand for the hinge mechanism to be thinner and lighter follows. The thinning of the hinge mechanism reduces the effective design space of the damping device inside the base. And as users' requirements for damping feel and hovering effect increase, it becomes more difficult to design a damping system with better performance within a smaller effective design space. Summary of the invention

[0004] The present application provides a hinge mechanism and a foldable electronic device, wherein a first damping mechanism in the hinge mechanism is fixed on a first connecting member, and the first damping mechanism cooperates with a first swing arm body to provide a damping force for the rotation of the first swing arm relative to a base. The structure of the first damping mechanism will not be limited by the size of the effective design space of the base, thereby facilitating reasonable optimization of the structure of the first damping mechanism according to actual needs, providing the hinge mechanism with a better damping feel and hovering effect, and will not increase the thickness of the base.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a rotating shaft mechanism, comprising: a base, a first swing arm, a first connecting member and a first damping mechanism; the first connecting member and the first swing arm are both hinged to one end of the base, and the hinge axis of the first swing arm relative to the base and the hinge axis of the first connecting member relative to the base both extend in a first direction; the first connecting member rotates relative to the base to drive the first swing arm to rotate relative to the base, so that the rotating shaft mechanism switches between an unfolded state and a folded state; when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm and the first connecting member can slide relative to each other in a second direction, and the second direction is perpendicular to the first direction; the first damping mechanism is fixed to the first connecting member, and comprises a first flexible mechanism and a second flexible mechanism, the first swing arm comprises a first swing arm body, and the first flexible mechanism and the second flexible mechanism are located on opposite sides of the first swing arm body in the first direction; the first flexible mechanism comprises an elastic member, the elastic member comprises a fixed end and an elastic arm, the fixed end and the elastic arm are distributed and connected in the second direction, the fixed end is relatively fixed to the first connecting member, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm body abuts between the second flexible mechanism and the elastic arm.

[0007] According to the rotating shaft mechanism of the embodiment of the present application, by fixing the first damping mechanism on the first connecting member, and using the cooperation between the first damping mechanism and the first swing arm body to provide a damping force for the rotation of the first swing arm relative to the base, the structure of the first damping mechanism will not be limited by the size of the effective design space of the base, so as to be conducive to reasonably optimizing the structure of the first damping mechanism according to actual needs, providing the rotating shaft mechanism with a better damping feel and hovering effect, and not increasing the thickness at the base, which is conducive to realizing the thinness of the rotating shaft mechanism. In addition, when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm body can drive the elastic arm to produce elastic deformation along the first direction. On the one hand, the reaction force generated by the elastic deformation of the elastic arm provides a damping force for the rotation of the first swing arm relative to the base; on the other hand, when an external force acts on the first connecting member, the setting of the elastic member is also conducive to the sliding of the first swing arm relative to the first connecting member in the second direction, preventing the problem that the first swing arm cannot slide in the second direction relative to the first connecting member due to the rigid abutment between the first flexible mechanism and the first swing arm, so as to take into account the damping feel and hovering effect of the rotating shaft mechanism and the folding and unfolding of the rotating shaft mechanism.

[0008] In an implementation of the first aspect, when the rotating shaft mechanism switches between the unfolded state and the folded state, the damping force applied by the first flexible mechanism to the first swing arm changes. In this way, when the rotating shaft mechanism switches between the unfolded state and the folded state, the user can have different damping feelings, thereby improving the user's use experience.

[0009] In an implementation of the first aspect, the surface of the elastic arm facing the second flexible mechanism has a matching slope, and the matching slope is arranged obliquely relative to the second direction; one end of the first swing arm body adjacent to the elastic arm has a matching portion, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the matching portion abuts against the matching slope. In this way, the setting of the matching slope can not only provide different damping forces for the sliding of the first swing arm relative to the first connecting member, but also enable the user to have different damping feel during the switching of the rotating shaft mechanism between the unfolded state and the folded state, so as to improve the user's use experience, and the structure is simple and easy to process and manufacture.

[0010] In an implementation of the first aspect, in the second direction and in the direction toward the base, the matching slope is inclined toward the second flexible mechanism; the surface of the elastic arm facing the second flexible mechanism also has a stop plane, the stop plane is located at one end of the matching slope close to the base and connected to the matching slope; in the second direction and in the direction toward the base, the stop plane is inclined toward a direction away from the second flexible mechanism; or, the stop plane is perpendicular to the first direction; in the folded state, the matching portion abuts against the stop plane. The extension direction of the stop plane is different from the extension direction of the matching slope, so that when the rotating shaft mechanism is in the folded state, the abutment relationship between the stop plane and the matching portion can prevent the matching portion from showing a "downhill" trend along the matching slope, thereby preventing the first swing arm from having a tendency to switch to the unfolded state, which is beneficial to improving the stability of the rotating shaft mechanism in the folded state.

[0011] In an implementation of the first aspect, the surface of the matching portion facing the elastic arm includes a first area and a second area, the first area and the second area are arranged in the second direction and connected, the first area is parallel to the matching slope, and the second area is parallel to the stop plane; in the folded state, the second area abuts against the stop plane; when the rotating shaft mechanism switches between the unfolded state and the folded state, the first area abuts against the matching slope. In this way, it is helpful to improve the reliability of the matching between the matching portion and the elastic arm, thereby improving the reliability of the relative sliding between the first swing arm and the first connecting member, and improving the reliability of the switching of the rotating shaft mechanism between the unfolded state and the folded state.

[0012] In an implementation of the first aspect, the elastic arm has a first stop step on the surface facing the second flexible mechanism, and the first stop step has a stop surface facing the base; the first swing arm body has a second stop step; in the unfolded state, the second stop step abuts against the stop surface. In this way, in the unfolded state, the second stop step and the first stop step are used to prevent the transitional unfolding of the rotating shaft mechanism, thereby preventing the folding screen from being pulled due to the transitional unfolding of the rotating shaft mechanism, which is beneficial to improving the service life of the folding screen and also beneficial to improving the unfolding flatness of the folding screen in the unfolded state. In addition, when the foldable electronic device falls from one side of the base in the folded state, the second stop step and the stop surface of the first stop step can be used to limit the transitional movement of the first connecting member downward along the first swing arm, thereby, on the one hand, being beneficial to at least to avoid the failure and fracture of the rotating shaft mechanism component caused by the falling process to a certain extent, and on the other hand, being beneficial to at least to avoid the deformation of the folding screen caused by the pulling of the first door panel during the falling process, thereby at least to avoid the failure of the folding screen to a certain extent.

[0013] In an implementation of the first aspect, the first stop step is located at an end of the stop plane away from the matching inclined surface and is connected to the stop plane.

[0014] On this basis, the second stop step is located at an end of the first area away from the second area and connected to the first area.

[0015] In an implementation of the first aspect, in the second direction and in the direction away from the base, the matching slope is inclined toward the second flexible mechanism; the surface of the elastic arm facing the second flexible mechanism also has a stop plane, the stop plane is located at one end of the matching slope away from the base and connected to the matching slope; in the second direction and in the direction away from the base, the stop plane is inclined toward the direction away from the second flexible mechanism; or, the stop plane is perpendicular to the first direction; in the unfolded state, the matching portion abuts against the stop plane. The extension direction of the stop plane is different from the extension direction of the matching slope, so that when the rotating shaft mechanism is in the unfolded state, the abutment relationship between the stop plane and the matching portion can prevent the matching portion from showing a "downhill" trend along the matching slope, thereby preventing the first swing arm from having a tendency to switch to the folded state, which is beneficial to improving the stability of the rotating shaft mechanism in the unfolded state.

[0016] In an implementation of the first aspect, the surface of the matching portion facing the elastic arm includes a first area and a second area, the first area and the second area are arranged in the second direction and connected, the first area is parallel to the matching inclined surface, and the second area is parallel to the stop plane; in the unfolded state, the second area abuts against the stop plane; when the rotating shaft mechanism switches between the unfolded state and the folded state, the first area abuts against the matching inclined surface. In this way, it is helpful to improve the reliability of the matching between the matching portion and the elastic arm, thereby improving the reliability of the relative sliding between the first swing arm and the first connecting member, and improving the reliability of the switching of the rotating shaft mechanism between the unfolded state and the folded state.

[0017] In an implementation of the first aspect, the elastic arm has a first stop step on its surface facing the second flexible mechanism, and the first stop step has a stop surface facing away from the base; the first swing arm body has a second stop step; in the folded state, the second stop step abuts against the stop surface. In this way, in the folded state, the second stop step cooperates with the first stop step to prevent the transitional folding of the rotating shaft mechanism, thereby preventing the folding screen from being pulled due to the transitional folding of the rotating shaft mechanism, which is beneficial to improving the service life of the folding screen.

[0018] In an implementation of the first aspect, the first stop step is located at an end of the stop plane away from the matching inclined surface and is connected to the stop plane.

[0019] On this basis, the second stop step is located at an end of the first area away from the second area and connected to the first area.

[0020] In an implementation of the first aspect, the elastic member extends along the second direction, and the fixed end is located at one end of the elastic arm in the second direction. When the elastic member extends along the second direction, the stiffness of the elastic member in the second direction is much greater than the stiffness of the elastic member in the first direction. The stiffness of the elastic member in the Y-axis direction is small, thereby facilitating elastic deformation of the elastic member in the Y-axis direction, so that the elastic member cooperates with the second flexible mechanism to apply a damping force to the first swing arm.

[0021] In addition, when a first stop step is provided on the elastic member and a second stop step is provided on the first swing arm, the elastic member has a large stiffness in the second direction and is less likely to deform in the second direction F, thereby facilitating improving the reliability of the cooperation between the first stop step and the second stop step.

[0022] In an implementation of the first aspect, the first flexible mechanism further comprises a rigid frame, the rigid frame is fixed to the first connecting member, the rigid frame is located on a side of the elastic member away from the second flexible mechanism, and the fixed end is fixed to the rigid frame. In this way, the rigid frame is located on a side of the elastic member away from the second flexible mechanism to prevent the rigid frame from interfering with the cooperation between the first swing arm and the elastic arm. The fixed end is fixed to the rigid frame, which is conducive to spacing the elastic arm from the first connecting member to facilitate elastic deformation of the elastic arm.

[0023] In an implementation of the first aspect, the first flexible mechanism includes a rigidity reinforcement structure, and the rigidity reinforcement structure is connected between the rigid frame and the elastic arm. In this way, the rigidity of the first flexible mechanism in the first direction can be increased, and the ability of the elastic arm to resist elastic deformation can be improved, so that when the rotating shaft mechanism switches between the unfolded state and the folded state, on the one hand, the damping force when the elastic arm and the first swing arm cooperate can be increased, and the damping effect can be improved, and on the other hand, the elastic deformation of the elastic arm along the first direction can be reduced, and the problem of the elastic arm being broken due to the transitional deformation of the elastic arm can be prevented, which is conducive to increasing the service life of the elastic arm.

[0024] In an implementation of the first aspect, when the rotating shaft mechanism switches between the folded state and the unfolded state, the stiffness coefficient of the first flexible mechanism is a constant value. This is conducive to improving the damping feel of the user during the switching of the rotating shaft mechanism between the unfolded state and the folded state, thereby improving the user's use experience.

[0025] In an implementation of the first aspect, the rigidity reinforcement structure includes a flexible beam, the flexible beam extends in a straight line, the two ends of the flexible beam along its own extension direction are directly connected to the elastic arm and the rigid frame respectively, and the flexible beam is arranged obliquely relative to the second direction. Thus, it is convenient for the flexible beam to be driven by the elastic arm to deform in the first direction when the rotating shaft mechanism switches between the unfolded state and the folded state, so that the rigidity of the plurality of flexible beams as a whole in the first direction is within a reasonable range. On the one hand, compared with not setting the rigidity reinforcement structure, the rigidity of the first flexible mechanism in the first direction can be increased, and the ability of the elastic arm to resist elastic deformation can be improved, so that when the rotating shaft mechanism switches between the unfolded state and the folded state, the damping force when the elastic arm and the first swing arm cooperate is increased, and the damping effect is improved; on the other hand, it can also prevent the rigidity of the rigidity reinforcement structure itself in the first direction from being too large, which will cause excessive interference to the elastic deformation of the elastic arm, which is conducive to improving the stability of the working of the rotating shaft mechanism. Moreover, the structure is simple, easy to process and manufacture, and can reduce the manufacturing cost.

[0026] In an implementation of the first aspect, the rigidity reinforcement structure includes a flexible beam unit, and the two ends of the flexible beam unit along its own extension trajectory are respectively connected to the rigid frame and the elastic arm; each flexible beam unit includes a plurality of flexible beams, and in the extension direction of the flexible beam unit, the plurality of flexible beams are sequentially connected end to end, and the extension directions of two adjacent flexible beams are different. Thus, in the flexible beam unit, the extension directions of two adjacent flexible beams are different, so that the junction of the two adjacent flexible beams can form a "corner", which is convenient for the flexible unit to be driven by the elastic arm when the rotating shaft mechanism switches between the unfolded state and the folded state and deform in the first direction, so that the rigidity of the plurality of flexible beams as a whole in the first direction is within a reasonable range. On the one hand, compared with not setting the rigidity reinforcement structure, the rigidity of the first flexible mechanism in the first direction can be increased, and the ability of the elastic arm to resist elastic deformation can be improved, so that when the rotating shaft mechanism switches between the unfolded state and the folded state, the damping force when the elastic arm cooperates with the first swing arm is increased, and the damping effect is improved; on the other hand, it can also prevent the rigidity of the rigidity reinforcement structure itself in the first direction from being too large, which will cause excessive interference to the elastic deformation of the elastic arm, which is conducive to improving the stability of the working of the rotating shaft mechanism. Moreover, the structure is simple, easy to process and manufacture, and the manufacturing cost can be reduced.

[0027] In an implementation of the first aspect, the multiple flexible beams of the flexible beam unit include a first flexible beam and a second flexible beam, the first flexible beam extends in a first direction, the second flexible beam is adjacent to the first flexible beam in the extension direction of the flexible beam unit itself, and the second flexible beam extends in a second direction. Thus, the first flexible beam extending along the first direction may have a stiffness in the first direction greater than that in the second direction, which is beneficial to ensuring the stiffness of the flexible beam unit. The second flexible beam extending in the second direction may have a stiffness in the second direction greater than that in the first direction, and the second flexible beam may be more easily deformed in the first direction. The provision of the second flexible beam may facilitate the flexible beam unit to be driven by the elastic arm to deform in the first direction when the rotating shaft mechanism switches between the unfolded state and the folded state. Moreover, the structure is simple, easy to process and manufacture, and can reduce manufacturing costs.

[0028] In an implementation of the first aspect, the multiple flexible beams of the flexible beam unit include a first flexible beam, a third flexible beam and a fourth flexible beam, the first flexible beam extends in the first direction; in the extension direction of the flexible beam unit itself, the third flexible beam is adjacent to the first flexible beam, the fourth flexible beam is adjacent to the first flexible beam, and the fourth flexible beam is located at an end of the first flexible beam away from the third flexible beam; the third flexible beam is inclined relative to the second direction, the fourth flexible beam is inclined relative to the second direction, and the inclination direction of the fourth flexible beam is opposite to that of the third flexible beam. Thus, the structure is simple, easy to process and manufacture, and the manufacturing cost can be reduced.

[0029] In an implementation of the first aspect, the rigidity reinforcement structure includes a first flexible beam and a third flexible beam, the first flexible beam extends in the first direction and is connected to the elastic arm, the third flexible beam is located on one side of the first flexible beam in the second direction and is connected between the first flexible beam and the rigid frame, and the third flexible beam is inclined relative to the second direction. Thus, the structure is simple, easy to process and manufacture, and the manufacturing cost can be reduced.

[0030] In an implementation of the first aspect, when the hinge mechanism switches between a folded state and an unfolded state, a stiffness coefficient of the first flexible mechanism is a change amount.

[0031] In an implementation of the first aspect, the rigidity reinforcement structure includes flexible beams, each flexible beam is an arc-shaped beam, and each flexible beam is directly connected between the elastic arm and the rigid frame.

[0032] In an implementation manner of the first aspect, when the rotating shaft mechanism switches between the unfolded state and the folded state, the damping force applied by the first flexible mechanism to the first swing arm is a constant force.

[0033] In an implementation of the first aspect, a side surface of the first connecting member has a recessed groove, the first damping mechanism is fixed in the recessed groove, one end of the recessed groove adjacent to the base has an opening, and the first swing arm body is passed through the opening. By providing the recessed groove and arranging the first damping mechanism in the recessed groove, it is helpful to reduce the overall thickness of the first damping mechanism and the first connecting member, and it is helpful to further reduce the thickness of the rotating shaft mechanism.

[0034] In an implementation of the first aspect, the second flexible mechanism and the first flexible mechanism are symmetrically arranged relative to the first swing arm body, and the second flexible mechanism and the first flexible mechanism have the same structure, the matching relationship between the second flexible mechanism and the first swing arm body is the same as the matching relationship between the first flexible mechanism and the first swing arm body, and the matching relationship between the second flexible mechanism and the first connecting member is the same as the matching relationship between the first flexible mechanism and the first connecting member. In this way, the force exerted on the first swing arm from the first flexible mechanism and the force exerted on the first swing arm from the second flexible mechanism are also symmetrical, which is conducive to improving the reliability of the first swing arm sliding relative to the first connecting member.

[0035] In an implementation of the first aspect, the first damping mechanism further includes a rigid fixing block. The rigid fixing block is connected between the rigid frame of the first flexible mechanism and the rigid frame of the second flexible mechanism. The first damping mechanism can be connected as a whole with high integration, thereby facilitating the disassembly and assembly of the first damping mechanism and the first connecting member.

[0036] In an implementation of the first aspect, the first swing arm includes a first rotating part, which is connected to one end of the first swing arm body adjacent to the base, and the first rotating part has a first axial hole; the rotating shaft mechanism also includes a first rotating shaft and a first damping device, the first rotating shaft is fixed to the base and passes through the first axial hole; the first damping device is fixed to the base and cooperates with the first rotating part to provide damping force for the relative rotation of the first swing arm and the base.

[0037] In an implementation of the first aspect, the pivot mechanism also includes a second swing arm, a second connecting member and a second damping mechanism; the second connecting member and the second swing arm are both hinged at the other end of the base, and the hinge axis of the second swing arm relative to the base and the hinge axis of the second connecting member relative to the base both extend in the first direction; the second connecting member rotates relative to the base to drive the second swing arm to rotate relative to the base, so that the pivot mechanism switches between the deployed state and the folded state; when the pivot mechanism switches between the deployed state and the folded state, the second swing arm and the first connecting member can slide relative to each other in a third direction, and the third direction is perpendicular to the first direction; the second damping mechanism is fixed to the second connecting member, and the second damping mechanism cooperates with the second swing arm to provide damping force for the rotation of the second swing arm relative to the base.

[0038] In an implementation of the first aspect, the structure of the second damping mechanism is the same as that of the first damping mechanism, the matching relationship between the second damping mechanism and the second swing arm is the same as the matching relationship between the first damping mechanism and the first swing arm, and the matching relationship between the second damping mechanism and the second connecting member is the same as the matching relationship between the first damping mechanism and the first connecting member.

[0039] In a second aspect, the present application provides a foldable electronic device, comprising: a first housing, a second housing, a hinge mechanism in any of the above technical solutions, and a folding screen. The hinge mechanism is connected between the first housing and the second housing, and the first housing and the second housing are configured to be rotatably connected through the hinge mechanism; the folding screen comprises a first display portion, a second display portion, and a third display portion, and the third display portion is connected between the first display portion and the second display portion, the first display portion is supported and fixed on the support surface of the first housing, the second display portion is supported and fixed on the support surface of the second housing, and the third display portion is supported on the support surface of the hinge mechanism.

[0040] Since the foldable electronic device provided in the embodiment of the present application includes the hinge mechanism of the above technical solution, the two can solve the same technical problem and achieve the same technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A perspective view of a foldable electronic device in an unfolded state provided for some embodiments of the present application;

[0042] Figure 2 Based on Figure 1 A perspective view of the foldable electronic device shown in a folded state;

[0043] Figure 3 Based on Figure 1 A three-dimensional view of a supporting device in a foldable electronic device shown;

[0044] Figure 4 Based on Figure 3 A partial structural schematic diagram of the rotating shaft mechanism 1 in the supporting device shown, wherein the rotating shaft mechanism is in an unfolded state;

[0045] Figure 5 Based on Figure 4 A schematic diagram of the coordination of the first swing arm, the second swing arm, a portion of the base, the first rotating shaft, and the second rotating shaft shown;

[0046] Figure 6 Based on Figure 4 An enlarged view of the circled portion of the rotating shaft mechanism shown at A;

[0047] Figure 7 Based on Figure 6 A schematic diagram of the coordination of the first damping device, the second damping device, the first swing arm and the second swing arm in the rotating shaft mechanism shown in ;

[0048] Figure 8 A three-dimensional diagram of a rotating shaft mechanism in an unfolded state provided for other embodiments of the present application;

[0049] Fig. 9 Based on Figure 8 An exploded schematic diagram of the rotating shaft mechanism shown;

[0050] Fig.10 Based on Fig. 9 A schematic diagram of the cooperation of the first damping mechanism, the first swing arm and the first connecting member shown;

[0051] Fig.11 Based on Fig.10 An exploded schematic diagram of the structure shown;

[0052] Fig.12 Based on Fig.11 A schematic diagram of the cooperation between the first damping mechanism and the first swing arm in the unfolded state is shown;

[0053] Fig.13 Based on Fig.11 A schematic diagram of the cooperation between the first damping mechanism and the first swing arm in a folded state is shown;

[0054] Fig.14 Based on Figure 3 A cross-sectional schematic diagram of the support device shown in a folded state;

[0055] Fig.15 Based on Fig.14 The schematic diagram of the supporting device shown is at the moment of falling and landing;

[0056] Fig.16 Based on Figure 3 A schematic diagram of the support device shown;

[0057] Fig.17 A schematic diagram of the cooperation between the second first damping mechanism and the first swing arm in the deployed state provided in an embodiment of the present application;

[0058] Fig.18 For Fig.12 A relationship diagram between the force applied to the elastic member extending along the second direction and the amount of deformation shown;

[0059] Fig.19 Based on Fig.12 A schematic diagram of a first damping mechanism of the first type is shown;

[0060] Fig. 20 A schematic diagram of a third first damping mechanism provided in an embodiment of the present application;

[0061] Fig.21 A schematic diagram of a fourth first damping mechanism provided in an embodiment of the present application;

[0062] Fig. 22 A schematic diagram of a fifth first damping mechanism provided in an embodiment of the present application;

[0063] Fig.23 A schematic diagram of a sixth first damping mechanism provided in an embodiment of the present application;

[0064] Fig.24 A schematic diagram of a seventh first damping mechanism provided in an embodiment of the present application;

[0065] Fig.25 A schematic diagram of an eighth first damping mechanism provided in an embodiment of the present application;

[0066] Fig.26 A schematic diagram of a ninth first damping mechanism provided in an embodiment of the present application;

[0067] Fig. 27 A schematic diagram of a tenth first damping mechanism provided in an embodiment of the present application;

[0068] Fig.28 A schematic diagram of an eleventh first damping mechanism provided in an embodiment of the present application;

[0069] Fig.29 A schematic diagram of a twelfth first damping mechanism provided in an embodiment of the present application;

[0070] Fig.30 Based on Fig. 9 An exploded schematic diagram of a partial structure of the rotating shaft mechanism shown;

[0071] Fig.31 Based on Fig. 9 A schematic diagram of the cooperation of the first door panel, the first connecting member and the first hinge member in the rotating shaft mechanism shown;

[0072] Fig.32 A partial structural schematic diagram of a rotating shaft mechanism provided in some further embodiments of the present application, in which the first rotating assembly is in a folded state and the second rotating assembly is in an unfolded state;

[0073] Fig.33 Based on Fig.32 A schematic diagram of the cooperation between the first damping mechanism and the first swing arm in the rotating shaft mechanism in the unfolded state;

[0074] Fig.34 Based on Fig.32 A schematic diagram of the cooperation between the first damping mechanism and the first swing arm in the rotating shaft mechanism in a folded state;

[0075] Fig.35 A schematic diagram of a thirteenth first damping mechanism provided in an embodiment of the present application;

[0076] Fig.36 This is a schematic diagram of the fourteenth first damping mechanism provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] In the embodiments of the present application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0078] In the description of the embodiments of the present application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present application generally indicates that the associated objects before and after are in an "or" relationship.

[0079] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0080] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0081] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within ±10° or ±15°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within ±10° or ±15°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, that the difference between the two equals is less than or equal to 5%, 10%, or 15% of either one of them.

[0082] Before introducing the embodiments of the present application, some professional terms that will be mentioned in the embodiments of the present application are first introduced, specifically:

[0083] Stiffness: refers to the ability of a material or structure to resist elastic deformation when subjected to force. The magnitude of stiffness can be characterized by the stiffness coefficient. The stiffness coefficient refers to the ratio of the force applied to a part to the deformation of the part. Among them, as the force applied to the part changes, the deformation of the part changes. In this process, when the stiffness coefficient is a constant value, it means that the part is a constant stiffness part. When the stiffness coefficient is a variable value, it means that the part is a variable stiffness part. Stiffness is divided into positive stiffness and negative stiffness. Among them, "positive stiffness" means that as the deformation increases, the reaction force applied to the part increases, and the stiffness coefficient is a positive value. "Negative stiffness" means that as the deformation increases, the reaction force applied to the part decreases, and the stiffness coefficient is a negative value.

[0084] Flexible mechanism (also known as compliant mechanism): a mechanism that relies on the elastic deformation of component elements to achieve force, motion or energy transmission and conversion. Specifically, it refers to a mechanical structure that uses all flexible components or a combination of flexible components and rigid components. When the above-mentioned flexible components are deformed, the mechanical structure will cause the structure connected to the flexible components to displace due to the deformation of the flexible components.

[0085] The embodiment of the present application provides a foldable electronic device. The foldable electronic device may include various electronic devices having a foldable screen and capable of changing the unfolded or folded form of the foldable screen and itself. Under different usage requirements, the foldable electronic device can be unfolded to an unfolded state or folded to a folded state.

[0086] Specifically, the foldable electronic device may be, but is not limited to, a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, a walkman, a radio, a television, a speaker, etc. Among them, the wearable device includes, but is not limited to, a smart bracelet, a smart watch, a smart head-mounted display, smart glasses, etc. For ease of understanding, in each embodiment of the present application, the foldable electronic device is described by taking a foldable screen mobile phone as an example.

[0087] See also Figure 1 , Figure 1 A three-dimensional diagram of a foldable electronic device 100 in an unfolded state provided in some embodiments of the present application. The foldable electronic device 100 includes a foldable screen 20 and a supporting device 10.

[0088] Understandably, Figure 1 Only some components of the foldable electronic device 100 are schematically shown, and the actual shapes, sizes, positions and structures of these components are not subject to any restriction. Figure 1 restrictions.

[0089] The folding screen 20 is used to display images, videos, etc.

[0090] The folding screen 20 includes a first display portion 201, a second display portion 202, and a third display portion 203 connected between the first display portion 201 and the second display portion 202. At least the third display portion 203 of the folding screen 20 is made of a flexible material. The first display portion 201 and the second display portion 202 can be made of a flexible material, or a rigid material, or partially made of a rigid material and partially made of a flexible material, which is not specifically limited here.

[0091] The folding screen 20 can switch between the unfolded state and the folded state. When the folding screen 20 is in the unfolded state, Figure 1 As shown, the first display part 201, the second display part 202 and the third display part 203 are arranged in the same plane and face the same direction. In this state, a large screen display can be realized, which can provide users with richer information and bring users a better use experience.

[0092] See also Figure 2 , Figure 2 Based on Figure 1 1 is a perspective view of a foldable electronic device 100 in a folded state. When the folding screen 20 is in the folded state, the first display portion 201 ( Figure 2 ) and the second display portion 202 ( Figure 2 (not shown) In contrast, the third display portion 203 is bent. The support device 10 is protected outside the folding screen 20 to prevent the folding screen 20 from being scratched by hard objects. The foldable device 100 in the folded state is small in size and easy to carry.

[0093] Figure 2 The foldable electronic device 100 shown in the figure is an inward-folding electronic device. In other embodiments, when the foldable electronic device 100 is in the folded state, the folding screen 20 may also be located outside the supporting device 10, and the folding screen 20 is visible to the user. In this case, the foldable electronic device 100 is an outward-folding electronic device. In the following description, an inward-folding electronic device is taken as an example for explanation.

[0094] The support device 10 is used to support and fix the folding screen 20. The support device 10 can switch between the unfolded state and the folded state to achieve the switching of the folding screen 20 between the unfolded state and the folded state. Figure 2 , and combined with Figure 3 , Figure 3 Based on Figure 1The 3D view of the supporting device 10 in the foldable electronic device 100 is shown. In this embodiment, the supporting device 10 includes a first housing 2, a second housing 3 and a hinge mechanism 1.

[0095] Understandably, Figure 2 and Figure 3 Only some components of the support device 10 are schematically shown, and the actual shape, size, position and configuration of these components are not subject to the present invention. Figure 2 and Figure 3 restrictions.

[0096] The first housing 2 is used to fix and support Figure 1 The first display portion 201 of the folding screen 20. Specifically, the first housing 2 has a support surface M1. The first housing 2 is fixed and supported by the support surface M1. Figure 1 The first display portion 201 of the middle folding screen 20. Exemplarily, the connection relationship between the support surface M1 and the first display portion 201 includes but is not limited to gluing.

[0097] The second housing 3 is used to fix and support Figure 1 The second display portion 202 of the folding screen 20. Specifically, the second housing 3 has a support surface M2. The second housing 3 is fixed and supported by the support surface M2. Figure 1 The second display portion 202 of the middle folding screen 20. Exemplarily, the connection relationship between the support surface M2 and the second display portion 202 includes but is not limited to gluing.

[0098] A first accommodating cavity (not shown in the figure) is formed inside the first shell 2. A second accommodating cavity (not shown in the figure) is formed inside the second shell 3. The first accommodating cavity and the second accommodating cavity are used to accommodate electronic components such as the motherboard, battery, camera module, speaker, and receiver of the foldable electronic device 100. Of course, it is understandable that in other examples, an accommodating cavity for accommodating electronic components such as the motherboard, battery, camera module, speaker, and receiver of the foldable electronic device 100 may be formed in only one of the first shell 2 and the second shell 3.

[0099] The first housing 2 can be a structural unit or can be formed by assembling multiple parts. Figure 3, the first shell 2 includes a first middle frame 21 and a first back cover 22. The support surface M1 is located on the first middle frame 21. The first back cover 22 is fixed to one end of the first middle frame 21 away from the support surface M1. The first accommodating cavity is formed between the first middle frame 21 and the first back cover 22. Similarly, the second shell 3 can be a structural entity or can be formed by assembling multiple parts. In some embodiments, the second shell 3 includes a second middle frame 31 and a second back cover 32. The support surface M2 is located on the second middle frame 31. The second back cover 32 is fixed to one end of the second middle frame 31 away from the support surface M2. The second accommodating cavity is formed between the second middle frame 31 and the second back cover 32.

[0100] The shaft mechanism 1 is used to support Figure 1 The third display portion 203 of the folding screen 20 shown in FIG. Specifically, the hinge mechanism 1 has a support surface M3. The hinge mechanism 1 can support the third display portion 203 of the folding screen 20 through the support surface M3.

[0101] The hinge mechanism 1 is connected between the first shell 2 and the second shell 3. The hinge mechanism 1 can switch between the unfolded state and the folded state, so that the first shell 2 and the second shell 3 are configured to be rotatably connected through the hinge mechanism 1 to realize the switching of the support device 10 between the unfolded state and the folded state.

[0102] Specifically, when the hinge mechanism 1 switches from the folded state to the unfolded state, it can drive the first shell 2 and the second shell 3 to rotate in opposite directions. During this process, the rotation direction of the first shell 2 is opposite to the rotation direction of the second shell 3. When the hinge mechanism 1 switches to the unfolded state, please continue to refer to Figure 3 , the support surface M1 of the first housing 2, the support surface M2 of the second housing 3, and the support surface M3 of the hinge mechanism 1 are coplanar and oriented in the same direction. Thus, the first housing 2 and the second housing 3 are unfolded, so that the first display part 201, the second display part 202, and the third display part 203 of the folding screen 20 are coplanar and oriented in the same direction, and the foldable electronic device 100 is switched to the unfolded state as a whole.

[0103] The hinge mechanism 1 can drive the first shell 2 and the second shell 3 to rotate toward each other during the process of switching from the unfolded state to the folded state. During this process, the rotation direction of the first shell 2 is opposite to the rotation direction of the second shell 3. When the hinge mechanism 1 switches to the folded state, the first shell 2 and the second shell 3 are opposite to each other, and the support surface M1 of the first shell 2 and the support surface M2 of the second shell 3 are opposite and both are on one side of the hinge mechanism 1, thereby realizing the folding of the first shell 2 and the second shell 3, so that the first display part 201 and the second display part 202 of the folding screen 20 can be arranged relative to each other, so that the foldable electronic device 100 is switched to the folded state as a whole.

[0104] Please continue reading Figure 3 The support surface M3 of the rotating shaft mechanism 1 includes a support surface M31, a support surface M33 and a support surface M32, wherein the support surface M33 is located between the support surface M31 and the support surface M32.

[0105] In the unfolded state, the support surface M31 is between the support surface M1 and the support surface M33 , and the support surface M32 is between the support surface M2 and the support surface M33 .

[0106] See also Figure 3 , and combined with Figure 4 , Figure 4 Based on Figure 3 The schematic diagram of the partial structure of the rotating shaft mechanism 1 in the supporting device 10 is shown, wherein the rotating shaft mechanism 1 is in an unfolded state. The rotating shaft mechanism 1 comprises a base 13, a first rotating assembly 11 and a second rotating assembly 12.

[0107] Understandably, Figure 4 Only some components of the rotating shaft mechanism 1 are schematically shown, and the actual shape, actual size, actual position and actual structure of these components are not subject to Figure 4 restrictions.

[0108] The base 13 is used to connect the first rotating assembly 11 and the second rotating assembly 12 .

[0109] In order to facilitate the description of the following embodiments, an XYZ coordinate system is established for the base 13. Specifically, the length direction of the base 13 is defined as the Y-axis direction (i.e., the first direction), that is, the extension direction of the rotation axis of the first shell 2 and the second shell 3 is the Y-axis direction, the thickness direction of the base 13 is the Z-axis direction, and the direction perpendicular to both the Y-axis direction and the Z-axis direction is the X-axis direction. It can be understood that the coordinate system setting of the base 13 can be flexibly set according to actual needs, and no specific limitation is made here.

[0110] The base 13 has a support surface M33 (combined with Figure 3 ). In the unfolded state, the support surface M33 on the base 13 is suitable for supporting the middle area of ​​the third display part 203 of the folding screen 20. In the folded state, the third display part 203 of the folding screen 20 is in a bent state, and a certain gap can be maintained between the third display part 203 and the base 13 to prevent the foldable electronic device 100 from being elastically deformed and squeezed with the base 13 when the foldable screen 20 falls, causing damage. Of course, it can be understood that in other examples, in the folded state, the third display part 203 of the folding screen 20 and the base 13 can also be in contact.

[0111] Specifically, in the folded state, the support surface M33 of the base 13 is perpendicular to the support surface M1 of the first shell 2 , and the support surface M33 of the base 13 is also perpendicular to the support surface M2 of the second shell 3 .

[0112] The first rotating assembly 11 and the second rotating assembly 12 are located at two ends of the base 13 in the X-axis direction. Figure 4 The first rotating assembly 11 includes: a first connecting member 111, a first active swing arm 112, a first swing arm 113, a first door panel 114 and a first hinged member 115.

[0113] The first connecting member 111 is fixed to the first housing 2. Specifically, the first connecting member 111 is fixed to the first middle frame 21. Exemplarily, the first connecting member 111 can be fixed to the first middle frame 21 by means of threaded connection, riveting, bonding, etc., or can be integrally formed with the first middle frame 21.

[0114] The first connecting member 111 is hinged to one end of the base 13. Specifically, the first connecting member 111 is hinged to one end of the base 13 through the first active swing arm 112. Specifically, one end of the first active swing arm 112 is hinged to the base 13, and extends along the Y-axis direction relative to the hinge axis of the base 13. The first connecting member 111 is hinged to the other end of the first active swing arm 112, and the first connecting member 111 extends along the Y-axis direction relative to the hinge axis of the first active swing arm 112.

[0115] The first swing arm 113 and the first connecting member 111 are located on the same side of the base 13. The first swing arm 113 is hinged at one end of the base 13. The hinge axis of the first swing arm 113 relative to the base 13 extends along the Y-axis direction. The first swing arm 113 and the first active swing arm 112 are arranged in the Y-axis direction. The hinge axis of the first active swing arm 112 relative to the base 13 and the hinge axis of the first swing arm 113 relative to the base 13 are parallel. In other words, the hinge axis of the first active swing arm 112 relative to the base 13 and the hinge axis of the first swing arm 113 relative to the base 13 extend in the same direction and are spaced apart.

[0116] When the hinge mechanism 1 switches between the unfolded state and the folded state, the first swing arm 113 and the first connecting member 111 can slide relatively in the second direction F (ie, a direction perpendicular to the Y-axis direction).

[0117] It is worth understanding that, since the first swing arm 113 is rotatable relative to the base 13, the second direction F is not a fixed direction in the XYZ coordinate system. The second direction F is always parallel to the XZ plane and perpendicular to the Y axis direction.

[0118] The first door panel 114 has a support surface M31 (combined with Figure 3). The first door panel 114 fixes and supports the portion of the third display portion 203 of the folding screen 20 close to the first display portion 201 through the support surface M31. Exemplarily, the connection method between the support surface M31 and the third display portion 203 includes but is not limited to gluing.

[0119] In order to improve the reliable support of the support surface M31 to the third display portion 203, the first connecting member 111, the first active swing arm 112, the first swing arm 113, the first door panel 114 and the first hinge 115 are all located on the side of the first door panel 114 facing away from the support surface M31. Specifically, the second direction F can be parallel to the support surface M31.

[0120] The first door panel 114 is hinged to the first connecting member 111. The hinge axis of the first door panel 114 relative to the first connecting member 111 extends along the Y-axis direction.

[0121] The first hinge 115 is hinged to one end of the base 13. When the rotating mechanism switches between the unfolded state and the folded state, the first door panel 114 and the first hinge 115 can slide relative to each other in the second direction F.

[0122] In this way, the first connecting member 111, the first active swing arm 112, the first door panel 114, the first hinge 115, the first swing arm 113 and the base 13 can form a connecting rod mechanism. When the first housing 2 rotates under the action of an external force, since the first connecting member 111 is fixedly connected to the first housing 2, the force at the first housing 2 can be transmitted to the first connecting member 111. When the force acting on the first connecting member 111 causes it to rotate relative to the base 13, the first swing arm 113, the first active swing arm 112, the first hinge 115, the first door panel 114, etc. will be mechanically linked, thereby realizing the folding and unfolding of the rotating shaft mechanism 1.

[0123] Please continue reading Figure 4 The second rotating assembly 12 includes: a second connecting member 121, a second active swing arm 122, a second swing arm 123, a second door panel 124 and a second hinge member 125.

[0124] The second connecting member 121 is fixed to the second housing 3. Specifically, the second connecting member 121 is fixed to the second middle frame 31. Exemplarily, the second connecting member 121 can be fixed to the second middle frame 31 by means of threaded connection, riveting, bonding, etc., or can be integrally formed with the second middle frame 31.

[0125] The second connecting member 121 is hinged to the other end of the base 13. Specifically, the second connecting member 121 is hinged to the other end of the base 13 through the second active swing arm 122. Specifically, one end of the second active swing arm 122 is hinged to the other end of the base 13, and extends along the Y-axis direction relative to the hinge axis of the base 13. The second connecting member 121 is hinged to the other end of the second active swing arm 122, and the second connecting member 121 extends along the Y-axis direction relative to the hinge axis of the second active swing arm 122.

[0126] The second swing arm 123 and the second connecting member 121 are located on the same side of the base 13. The second swing arm 123 is hinged to the other end of the base 13. The hinge axis of the second swing arm 123 relative to the base 13 extends along the Y-axis direction. The second swing arm 123 and the second active swing arm 122 are arranged in the Y-axis direction. The hinge axis of the second active swing arm 122 relative to the base 13 is parallel to the hinge axis of the second swing arm 123 relative to the base 13. In other words, the extension direction of the hinge axis of the second active swing arm 122 relative to the base 13 is consistent with and spaced apart from the hinge axis of the second swing arm 123 relative to the base 13.

[0127] When the hinge mechanism 1 switches between the unfolded state and the folded state, the second swing arm 123 and the second connecting member 121 can slide relatively in the third direction E (ie, a direction perpendicular to the Y-axis direction).

[0128] It is worth understanding that, since the second swing arm 123 is rotatable relative to the base 13, the third direction E is not a fixed direction in the XYZ coordinate system. The third direction E is always parallel to the XZ plane and perpendicular to the Y-axis direction. In the unfolded state, the third direction E, the second direction F and the X-axis direction are consistent.

[0129] The second door panel 124 has a support surface M32 (combined with Figure 3 ). The second door panel 124 fixes and supports the portion of the third display portion 203 of the folding screen 20 close to the second display portion 202 through the support surface M32. Exemplarily, the connection method between the support surface M32 and the third display portion 203 includes but is not limited to gluing. Specifically, the third direction E can be parallel to the support surface M32.

[0130] In order to improve the reliable support of the support surface M32 for the third display part 203, the above-mentioned second connecting member 121, second active swing arm 122, second swing arm 123, and second hinge 125 are all located on the side of the second door panel 124 facing away from the support surface M32.

[0131] The second door panel 124 is hinged to the second connecting member 121. The hinge axis of the second door panel 124 relative to the second connecting member 121 extends along the Y-axis direction.

[0132] The second hinged member 125 is hinged to the other end of the base 13. When the rotating mechanism switches between the unfolded state and the folded state, the second door panel 124 and the second hinged member 125 can slide relative to each other in the third direction F.

[0133] In this way, the second connecting member 121, the second active swing arm 122, the second door panel 124, the second hinged member 125, the second swing arm 123 and the base 13 can form a connecting rod mechanism. When the second housing 3 rotates under the action of an external force, since the second connecting member 121 is fixedly connected to the second housing 3, the force at the second housing 3 can be transmitted to the second connecting member 121. When the force acting on the second connecting member 121 causes it to rotate relative to the base 13, the second active swing arm 122, the second door panel 124, the second hinged member 125 and the second swing arm 123 will be mechanically linked, thereby realizing the folding and unfolding of the rotating shaft mechanism 1.

[0134] See also Figure 5 , Figure 5 Based on Figure 4 The diagram of the coordination of the first swing arm 113, the second swing arm 123, a part of the base 13, the first rotating shaft 131 and the second rotating shaft 132 is shown. In order to facilitate the articulation of the first swing arm 113 and the base 13 and the articulation of the second swing arm 123 and the base 13, the rotating shaft mechanism 1 also includes a first rotating shaft 131 and a second rotating shaft 132. The first rotating shaft 131 and the second rotating shaft 132 are both fixed to the base 13. The first rotating shaft 131 and the second rotating shaft 132 are arranged in parallel. Exemplarily, the connection method between the first rotating shaft 131 and the base 13 includes but is not limited to gluing, welding, clamping or screw connection. The connection method between the second rotating shaft 132 and the base 13 includes but is not limited to gluing, welding, clamping or screw connection.

[0135] The first swing arm 113 includes a first swing arm body 1130 and a first rotating portion 1131. When the hinge mechanism 1 switches between the unfolded state and the folded state, the first swing arm body 1130 and the first connecting member 111 are slidably matched. The first rotating portion 1131 is connected to an end of the first swing arm body 1130 adjacent to the base 13. The first rotating portion 1131 has a first shaft hole 11311. The first rotating shaft 131 is passed through the first shaft hole 11311. The first rotating portion 1131 rotates around the first rotating shaft 131, thereby realizing the hinge connection between the first swing arm 113 and the base 13, so that the structure is simple and easy to process and manufacture.

[0136] The second swing arm 123 includes a second swing arm body 1230 and a second rotating part 1231. When the rotating shaft mechanism 1 switches between the unfolded state and the folded state, the second swing arm body 1230 and the second connecting member 121 are slidably matched. The second rotating part 1231 has a second shaft hole 12311. The second rotating shaft 132 is passed through the second shaft hole 12311. The second rotating part 1231 rotates around the second rotating shaft 132, thereby realizing the hinge connection between the second swing arm 123 and the base 13, so that the structure is simple and easy to process and manufacture.

[0137] In some other examples, the first rotating shaft 131 may also be disposed on the first swing arm 113 , the second rotating shaft 132 may also be disposed on the second swing arm 123 , and the first shaft hole 11311 and the second shaft hole 12311 may be disposed on the base 13 at the same time.

[0138] In order to provide a damping force to improve the damping feel of the foldable electronic device 100 during the switching process between the folded state and the unfolded state, and to realize the hovering of the foldable electronic device 100 to facilitate the use of the user, please refer to Figure 6 , Figure 6 Based on Figure 4 The illustrated enlarged view of the part of the rotating shaft mechanism 1 circled at A. The rotating shaft mechanism 1 further includes a first damping device 14 and a second damping device 15. The first damping device 14 and the second damping device 15 are both disposed on the base 13.

[0139] The first damping device 14 cooperates with the first rotating portion 1131 to provide a damping force for the rotation of the first swing arm 113 relative to the base 13. The second damping device 15 cooperates with the second rotating portion 1231 to provide a damping force for the rotation of the second swing arm 123 relative to the base 13.

[0140] It is worth noting that the second damping device 15 has the same structure as the first damping device 14, the assembly relationship between the second damping device 15 and the second swing arm 123, and the assembly relationship between the first damping device 14 and the first swing arm 113 are the same, the assembly relationship between the second damping device 15 and the base 13, and the assembly relationship between the first damping device 14 and the base 13 are also the same. The first damping device 14 is taken as an example for detailed description below, and the specific structure of the second damping device 15 will not be repeated.

[0141] Specifically, the first damping device 14 may include an elastic driving member 145 , a first concave cam 141 , a second concave cam 142 , a retaining spring 143 and a blocking piece 144 .

[0142] The clamping spring 143 and the blocking piece 144 are both fixed on the base 13. The clamping spring 143 and the blocking piece 144 are spaced apart in the Y-axis direction. A first concave cam 141 is respectively provided at both ends of the first rotating part 1131 in the Y-axis direction, and the first concave cam 141 is sleeved on the first rotating shaft 131. Two second concave cams 142 are sleeved on the first rotating shaft 131. The first rotating part 1131 and the first concave cams 141 at both ends of the first rotating part 1131 are integrally located between the two second concave cams 142. The two first concave cams 141 on the first rotating part 1131 are matched with the two second concave cams 142 in a one-to-one correspondence. And the two second concave cams 142 and the first rotating part 1131 are integrally limited between the clamping spring 143 and the blocking piece 144. An elastic driving member 145 is provided between one of the second concave cams 142 and the clamping spring 143. The elastic driving member 145 is pressed between one of the second concave cams 142 and the clamping spring 143. The side of the other second concave cam 142 away from the first swing arm 113 abuts against the blocking piece 144 for limiting position. Exemplarily, the elastic driving member 145 is a spring.

[0143] For details, please refer to Figure 7 , Figure 7 Based on Figure 6 Schematic diagram of the coordination of the first damping device 14, the second damping device 15, the first swing arm 113 and the second swing arm 123 in the rotating shaft mechanism 1 shown in . The surface of the first concave cam 141 facing the corresponding second concave cam 142 has a first convex surface S1 and a first concave surface S2 that is recessed relative to the first convex surface S1. The multiple first convex surfaces S1 and the multiple first concave surfaces S2 on the first concave cam 141 are alternately arranged in the circumferential direction of the first concave cam 141. The surface of the second concave cam 142 facing the corresponding first concave cam 141 has a second convex surface S3 and a second concave surface S4 that is recessed relative to the second convex surface S3. The multiple second concave surfaces S4 and the multiple second convex surfaces S3 of the second concave cam 142 are alternately arranged along the circumferential direction of the second concave cam 142.

[0144] In the folded state and the unfolded state, the second convex surface S3 on the second concave cam 142 is matched with different first concave surfaces S2 on the first concave cam 141, and similarly, the first convex surface S1 on the first concave cam 141 is matched with different second concave surfaces S4 on the second concave cam 142. When the foldable electronic device 100 is switched between the unfolded state and the folded state, the second convex surface S3 on the second concave cam 142 is gradually switched from matching with one of the first concave surfaces S2 on the first concave cam 141 to matching with another first concave surface S2, and the first convex surface S1 on the first concave cam 141 is gradually switched from matching with one of the second concave surfaces S4 on the second concave cam 142 to matching with another second concave surface S4. In this process, the pressure on the elastic driving member 145 gradually increases first, and then is gradually released. At the same time, the second concave cam 142 matched with the elastic driving member 145 produces axial displacement as the pressure on the elastic driving member 145 changes. In this way, it is convenient for the rotating shaft mechanism 1 to generate damping forces of different magnitudes when switching between the folded state and the unfolded state, and the damping force changes periodically. On this basis, when there is no external force applied by the user, the current state is maintained by utilizing the elastic force of the elastic driving member 145, the second convex surface S3 on the second concave cam 142 and the first concave surface S2 on the first concave cam 141, and the first convex surface S1 on the first concave cam 141 and the second concave surface S4 on the second concave cam 142, so as to achieve hovering.

[0145] As the requirements for electronic devices 100 to be thinner and lighter become stronger, the requirements for the hinge mechanism 1 to be thinner and lighter follow. The thinning and lighter hinge mechanism 1 reduces the effective design space of the first damping device 14 and the second damping device 15 inside the base 13. As users' requirements for damping feel and hovering effect increase, it becomes difficult to improve the first damping device 14 and the second damping device 15 within the smaller effective design space of the base 13, and to design the first damping device 14 and the second damping device 15 with better performance.

[0146] To solve the above technical problems, please refer to Figure 8 and Fig. 9 , Figure 8 A three-dimensional diagram of a rotating shaft mechanism 1 in an unfolded state provided in some other embodiments of the present application; Fig. 9 Based on Figure 8 The exploded schematic diagram of the rotating shaft mechanism 1 is shown. The difference between this embodiment and the above embodiment is that the first rotating assembly 11 further includes a first damping mechanism 16 .

[0147] Understandably, Figure 8 and Fig. 9The illustrated rotating shaft mechanism 1 may be some of the components included in the rotating shaft mechanism 1, or may be all of the components. The actual shape, actual size, actual position and actual structure of these components are not limited to Figure 8 and Fig. 9 restrictions.

[0148] The first damping mechanism 16 is fixed to the first connecting member 111. The connection relationship between the first damping mechanism 16 and the first connecting member 111 includes but is not limited to clamping, welding, screw connection or gluing.

[0149] The first damping mechanism 16 cooperates with the first swing arm body 1130 to provide a damping force for the rotation of the first swing arm 113 relative to the base 13 .

[0150] In this way, by fixing the first damping mechanism 16 on the first connecting member 111, and utilizing the cooperation between the first damping mechanism 16 and the first swing arm body 1130 to provide a damping force for the rotation of the first swing arm 113 relative to the base 13, the structure of the first damping mechanism 16 will not be limited by the size of the effective design space of the base 13, which is conducive to reasonably optimizing the structure of the first damping mechanism 16 according to actual needs, providing the hinge mechanism 1 with a better damping feel and hovering effect, and will not increase the thickness of the base 13, which is conducive to realizing the thinness of the hinge mechanism 1.

[0151] See also Fig.10 and Fig.11 , Fig.10 Based on Fig. 9 A schematic diagram of the cooperation among the first damping mechanism 16, the first swing arm 113 and the first connecting member 111 is shown. Fig.11 Based on Fig.10 The exploded schematic diagram of the structure shown in FIG. The first connecting member 111 has a concave groove 1116 on the surface thereof which faces the same direction as the supporting surface M31 of the first door panel 114 . The first damping mechanism 16 is fixed in the concave groove 1116 .

[0152] The recessed groove 1116 has an opening toward the first door panel 114. Here, it is worth noting that the first damping mechanism 16 is fixed in the recessed groove 1116, which means that the first damping mechanism 16 can be fixed in the recessed groove 1116 as a whole, and the first damping mechanism 16 does not extend from the opening; the first damping mechanism 16 can also be partially located in the recessed groove 1116 and partially extend from the opening of the recessed groove 1116. On this basis, in order to prevent the first damping mechanism 16 from interfering with the assembly between the first connecting member 111 and the first door panel 114, the first damping mechanism 16 can be fixed in the recessed groove 1116 as a whole.

[0153] In other examples, the recessed groove 1116 may also be disposed on the surface of the first connecting member 111 facing away from the first door panel 114 .

[0154] One end of the recessed groove 1116 adjacent to the base 13 has an opening 11161. That is, the side wall surface of the recessed groove 1116 adjacent to the base has an opening 11161. The first swing arm body 1130 is disposed through the opening 11161. The portion of the first swing arm 113 located in the recessed groove 1116 cooperates with the first damping mechanism 16.

[0155] In this example, by providing the recessed groove 1116 and arranging the first damping mechanism 16 in the recessed groove 1116, it is helpful to reduce the overall thickness of the first damping mechanism 16 and the first connecting member 111, which is helpful to further reduce the thickness of the rotating shaft mechanism 1. Of course, it can be understood that in other embodiments, the recessed groove 1116 may not be provided on the first connecting member 111.

[0156] Please continue reading Fig.10 and Fig.11 The first damping mechanism 16 includes a first flexible mechanism 161 and a second flexible mechanism 162. The first flexible mechanism 161 and the second flexible mechanism 162 are located at opposite sides of the first swing arm body 1130 in the Y-axis direction.

[0157] See also Fig.12 and Fig.13 , Fig.12 Based on Fig.11 The first damping mechanism 16 and the first swing arm 113 are shown in the diagram of cooperation in the unfolded state. Fig.13 Based on Fig.11 The first damping mechanism 16 and the first swing arm 113 are shown in the schematic diagram of cooperation in the folded state. When the shaft mechanism 1 switches between the unfolded state and the folded state, the first swing arm body 1130 can abut between the first flexible mechanism 161 and the second flexible mechanism 162 .

[0158] In this way, when the hinge mechanism 1 switches between the unfolded state and the folded state, the first damping mechanism 16 can provide a damping force for the rotation of the first swing arm 113 relative to the base 13 .

[0159] Please continue reading Fig.12 and Fig.13 The second flexible mechanism 162 has the same structure as the first flexible mechanism 161. The second flexible mechanism 162 and the first flexible mechanism 161 are symmetrically arranged relative to the first swing arm body 1130. The matching relationship between the second flexible mechanism 162 and the first swing arm body 1130 is the same as the matching relationship between the first flexible mechanism 161 and the first swing arm body 1130, and the matching relationship between the second flexible mechanism 162 and the first connecting member 111 is the same as the matching relationship between the first flexible mechanism 161 and the first connecting member 111.

[0160] In this way, the forces acting on the first swing arm 113 from the first flexible mechanism 161 and the forces acting on the second flexible mechanism 162 are also symmetrical, which is beneficial to improving the reliability of the sliding of the first swing arm 113 relative to the first connecting member 111. Of course, it can be understood that in other examples, the structures of the second flexible mechanism 162 and the first flexible mechanism 161 can also be different.

[0161] In order to simplify the description, the first flexible mechanism 161 is taken as an example for explanation below, and the specific structure of the second flexible mechanism 162 will not be repeated.

[0162] Please continue reading Fig.12 and Fig.13 , the first flexible mechanism 161 includes an elastic member 1611 .

[0163] The elastic member 1611 includes a fixed end 16112 and an elastic arm 16111 .

[0164] The fixed end 16112 is relatively fixed to the first connecting member 111 .

[0165] The fixed end 16112 and the elastic arm 16111 are distributed and connected in the second direction F. When the hinge mechanism 1 switches between the unfolded state and the folded state, the first swing arm body 1130 abuts between the second flexible mechanism 162 and the elastic arm 16111 . In this way, when the hinge mechanism 1 switches between the unfolded state and the folded state, the first swing arm body 1130 can drive the elastic arm 16111 to produce elastic deformation along the Y-axis direction. On the one hand, the reaction force generated by the elastic deformation of the elastic arm 16111 provides a damping force for the rotation of the first swing arm 113 relative to the base 13; on the other hand, when an external force acts on the first connecting member 111, the setting of the elastic member 1611 is also conducive to the sliding of the first swing arm 113 relative to the first connecting member 111 in the second direction F, thereby preventing the first swing arm 113 from being unable to slide in the second direction F relative to the first connecting member 111 due to the rigid abutment between the first flexible mechanism and the first swing arm 113, thereby taking into account the damping feel and hovering effect of the hinge mechanism 1 as well as the folding and unfolding of the hinge mechanism 1.

[0166] Please continue reading Fig.12 and Fig.13, the fixed end 16112 is located at one end of the elastic arm 16111 close to the base 13 in the second direction F. In this way, the elastic arm 16111 is relatively far away from the base 13, so that sufficient sliding space can be provided for the first swing arm 113 to slide relative to the first connecting member 111, thereby improving the reliability of the cooperation between the first swing arm 113 and the first connecting member 111. In other embodiments, the fixed end 16112 can also be set at one end of the elastic arm 16111 in the second direction F away from the base 13. Alternatively, in other examples, each end of the elastic arm 16111 in the second direction F is provided with a fixed end 16112.

[0167] When the rotating shaft mechanism 1 switches between the unfolded state and the folded state, the damping force applied by the first damping mechanism 16 to the first swing arm 113 may be variable or constant. It is worth noting that when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, the change in the damping force applied by the first damping mechanism 16 to the first swing arm 113 means that in the process of switching the rotating shaft mechanism 1 between the unfolded state and the folded state, at least two travel positions where the first swing arm 113 slides relative to the first connecting member 111, the damping force applied by the first damping mechanism 16 to the first swing arm 113 is different. Taking the process of switching the rotating shaft mechanism 1 from the unfolded state to the folded state as an example, in the process of switching the rotating shaft mechanism 1 from the unfolded state to the folded state, as the sliding distance of the first swing arm 113 increases, the damping force applied by the first damping mechanism 16 to the first swing arm 113 changes linearly or curve-wise.

[0168] For ease of description, the first damping mechanism 16 is described below with reference to Example 1 and Example 2. In Example 1, the damping force applied by the first damping mechanism 16 to the first swing arm 113 changes. In Example 2, the damping force applied by the first damping mechanism 16 to the first swing arm 113 remains unchanged.

[0169] Example 1

[0170] In order to allow the user to have different damping feelings when the hinge mechanism 1 switches between the unfolded state and the folded state, so as to improve the user's experience, the damping force applied by the first flexible mechanism 161 to the first swing arm 113 is variable.

[0171] For details, please continue to refer to Fig.12 and Fig.13 The surface of the elastic arm 16111 facing the second flexible mechanism 162 has a matching slope A1. The matching slope A1 is inclined relative to the second direction F.

[0172] It is worth noting that, according to the different inclination directions of the matching inclined surface A1, two embodiments (ie, embodiment 1 and embodiment 2) are used as examples in Example 1.

[0173] Embodiment 1: In the second direction F and in the direction toward the base 13 , the matching slope A1 is inclined toward the second flexible mechanism 162 .

[0174] One end of the first swing arm body 1130 adjacent to the elastic arm 16111 has a matching portion 11301. When the hinge mechanism 1 switches between the unfolded state and the folded state, the matching portion 11301 abuts against the matching inclined surface A1.

[0175] For more details, please refer to Fig.12 and Fig.13 , when the hinge mechanism 1 is in the unfolded state, in the second direction F, the mating portion 11301 is on the side of the mating slope A1 away from the base 13. When the hinge mechanism 1 switches from the unfolded state to the folded state, the first swing arm body 1130 slides relative to the first connecting member 111 in the second direction F and toward the base 13. In this process, restricted by the second flexible mechanism 162, the mating portion 11301 abuts against the mating slope A1 to generate extrusion, and the elastic arm 16111 generates elastic deformation. As the first swing arm 113 slides, the mating portion 11301 shows a "climbing" trend on the mating slope A1, the deformation degree of the elastic arm 16111 gradually increases, and the damping force applied by the elastic arm 16111 to the mating portion 11301 gradually increases.

[0176] On the contrary, when the hinge mechanism 1 switches from the folded state to the unfolded state, the first swing arm body 1130 slides relative to the first connecting member 111 in the second direction F and in the direction away from the base 13. In this process, restricted by the second flexible mechanism 162, the mating portion 11301 abuts against the mating inclined surface A1 to generate extrusion, and the elastic arm 16111 generates elastic deformation. As the first swing arm 113 slides, it presents a "downhill" trend on the mating inclined surface A1. The degree of deformation of the elastic arm 16111 gradually decreases, and the damping force applied by the elastic arm 16111 to the mating portion 11301 gradually decreases.

[0177] It can be seen that, with the setting of the inclined surface A1, not only can different damping forces be provided for the sliding of the first swing arm 113 relative to the first connecting member 111, but also the user can have different damping feels when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, thereby improving the user's experience. Moreover, the structure is simple and easy to process and manufacture.

[0178] It is understandable that the surface of the elastic arm 16111 facing the second flexible mechanism 162 is not limited to the implementation form of providing the matching inclined surface A1 to provide different damping force magnitudes to the first swing arm 113. In other examples, the matching inclined surface A1 on the surface of the elastic arm 16111 facing the second flexible mechanism 162 can also be replaced by a stepped surface, a curved surface (such as an arc surface), or a combination of a curved surface and a flat surface, as long as the matching surface can be matched with the matching portion 11301 during the switching of the rotating shaft mechanism 1 between the unfolded state and the folded state.

[0179] Through the above analysis, it can be found that, assuming that when the hinge mechanism 1 is switched to the folded state, the mating portion 11301 is still in contact with the mating slope A1. At this time, the deformation degree of the elastic arm 16111 reaches the maximum, and the damping force applied by the elastic arm 16111 to the mating portion 11301 is the maximum. Limited by the second flexible mechanism 162, and the inclined setting of the mating slope A1, the mating portion 11301 has a tendency to present a "downhill" trend along the mating slope A1, and the first swing arm 113 has a tendency to switch to the unfolded state, thus causing the hinge mechanism 1 to be unable to remain in the folded state.

[0180] Based on this, in order to keep the hinge mechanism 1 in the folded state, please continue to refer to Fig.13 The surface of the elastic arm 16111 facing the second flexible mechanism 162 also has a stop plane A2. The stop plane A2 is located at the end of the matching slope A1 close to the base 13 and is connected to the matching slope A1. The stop plane A2 is perpendicular to the Y-axis direction. In this way, the extension direction of the stop plane A2 is different from the extension direction of the matching slope A1, so that when the hinge mechanism 1 is in the folded state, the abutment relationship between the stop plane A2 and the matching portion 11301 can be used to avoid the matching portion 11301 from showing a "downhill" trend along the matching slope A1, thereby avoiding the first swing arm 113 from having a tendency to switch to the unfolded state, which is beneficial to improving the stability of the hinge mechanism 1 in the folded state.

[0181] It is worth to understand that the stop plane A2 is not limited to being perpendicular to the Y-axis direction. In other embodiments, in the second direction F and in the direction toward the base 13, the stop plane A2 may be inclined in a direction away from the second flexible mechanism 162. In other embodiments, when other locking structures for locking the hinge mechanism 1 in the folded state are additionally provided in the hinge mechanism 1, the stop plane A2 may not be provided on the elastic arm 16111.

[0182] On this basis, in order to improve the reliability of the cooperation between the cooperation portion 11301 and the elastic arm 16111, please continue to refer to Fig.12 and Fig.13The surface of the mating portion 11301 facing the elastic arm 16111 includes a first area B1 and a second area B2. The first area B1 and the second area B2 are arranged and connected in the second direction F. The first area B1 is parallel to the mating inclined surface A1. The second area B2 is parallel to the stop plane A2. When the hinge mechanism 1 is in the folded state, please refer to Fig.13 , the second area B2 abuts against the stop plane A2; when the hinge mechanism 1 switches between the unfolded state and the folded state, the first area B1 abuts against the matching slope A1. This is conducive to improving the reliability of the matching between the matching portion 11301 and the elastic arm 16111, thereby improving the reliability of the relative sliding between the first swing arm 113 and the first connecting member 111, and improving the reliability of the hinge mechanism 1 switching between the unfolded state and the folded state.

[0183] Exemplarily, when the hinge mechanism 1 is switched to the unfolded state, the first area B1 may or may not abut against the matching inclined surface A1.

[0184] Of course, it is understood that the structure of the matching portion 11301 is not limited thereto, and in other embodiments, the matching portion 11301 may only have the first area B1 or the second area B2 described above. In other examples, the surface of the matching portion 11301 facing the elastic arm 16111 may not include the first area B1 and the second area B2 described above, and the surface of the matching portion 11301 facing the elastic arm 16111 may be other shapes different from the first area B1 and the second area B2.

[0185] See also Fig.14 and Fig.15 , Fig.14 Based on Figure 3 The supporting device 10 is shown in a schematic diagram in a folded state. Fig.15 Based on Fig.14 The schematic diagram of the supporting device 10 shown in FIG. Fig.14In the drop test experiment of the foldable electronic device 100 of the support device 10 shown, it is found that when the foldable electronic device 100 falls from the side of the base 13 in the folded state, due to the setting of the first damping device 14 and the second damping device 15, the foldable electronic device 100 always maintains the folded state when it falls. Moreover, at the moment when the foldable electronic device 100 falls, the base 13 is stationary because the acceleration of contacting the ground is 0. However, the first shell 2, the second shell 3, the first connecting member 111, the second connecting member 121, etc. will continue to fall to the side where the base 13 is located under the action of inertia and gravity. Due to the sliding cooperation between the first connecting member 111 and the first swing arm 113 and the sliding cooperation between the second connecting member 121 and the second swing arm 123. Therefore, the first connecting member 111 moves along the first swing arm 113 to the side where the base 13 is located, and the second connecting member 121 moves down along the second swing arm 123 to the side where the base 13 is located. Since the first door panel 114 is hinged to the first connecting member 111, the descent of the first connecting member 111 will drive the first door panel 114 to move downward relative to the first swing arm 113. Similarly, since the second door panel 124 is hinged to the second connecting member 121, the descent of the second connecting member 121 will drive the second door panel 124 to move downward relative to the second swing arm 123. Since the first door panel 114 and the second door panel 124 are used to support and fix the folding screen 20. Therefore, the downward movement of the first door panel 114 and the second door panel 124 will cause the folding screen 20 connected to the first door panel 114 and the second door panel 124 to be pulled downward, resulting in the following situation: Fig.15 The deformation shown can easily cause delamination of the folding screen 20, for example, delamination of the touch layer and the display layer of the folding screen 20, resulting in display failure of the folding screen 20.

[0186] In addition, during the above-mentioned falling process, the relative position relationship between the first connecting member 111, the first swing arm 113, the first door panel 114, the base 13 and other components, as well as the second connecting member 121, the second swing arm 123, the second door panel 124, the base 13 and other components has changed, which can easily cause the hinge mechanism 1 to get stuck or hard interference between components, resulting in failure and breakage of the components.

[0187] In addition, during the above-mentioned falling process, the relative positional relationship among the first connecting member 111, the first swing arm 113, the first door panel 114, the base 13 and other components changes, causing the first shell 2 to move toward the base 13 and collide with the base 13; similarly, the relative positional relationship among the second connecting member 121, the second swing arm 123, the second door panel 124, the base 13 and other components changes, causing the second shell 3 to move toward the base 13 and collide with the base 13. In this way, the first shell 2, the second shell 3 and the base 13 are easily damaged.

[0188] It is worth noting that, during the falling process of the support device 10 in the folded state, the first connecting member 111 moves along the first swing arm 113 to the side where the base 13 is located, which is equivalent to the relative position between the first swing arm 113 and the first connecting member 111 being switched to the unfolded state. Similarly, the second connecting member 121 moves along the second swing arm 123 to the side where the base 13 is located, which is equivalent to the relative position between the second swing arm 123 and the second connecting member 121 being switched to the unfolded state. If the impact force of the support device 10 falling downward is large, it is very likely that the maximum position of the first connecting member 111 moving along the first swing arm 113 to the side where the base 13 is located exceeds the relative position between the first connecting member 111 and the first swing arm 113 in the unfolded state, and the maximum position of the second connecting member 121 moving along the second swing arm 123 to the side where the base 13 is located exceeds the position between the second connecting member 121 and the second swing arm 123 in the unfolded state. In this way, the risk of failure of the folding screen 20 and the problem of the hinge mechanism 1 being stuck or the component failure and fracture will be further aggravated.

[0189] See also Fig.16 , Fig.16 Based on Figure 3 When the shaft mechanism 1 switches to the unfolded state, if the external force is too large, the shaft mechanism 1 may exceed the unfolded state and reach a transitional unfolded state, such as Fig.16 The state indicated by the dotted line in the middle. At this time, the angle between the support surface M1 of the first shell 2 and the support surface M2 of the second shell 3 is α1. α1 is greater than the angle α2 between the support surface M1 of the first shell 2 and the support surface M2 of the second shell 3 in the normal unfolded state. In this way, the first shell 2 and the second shell 3 will pull the folding screen 20, which is easy to cause damage to the folding screen 20.

[0190] In order to solve the above Fig.15 and Fig.16 For any of the above mentioned problems, please continue to refer to Fig.12 , the elastic arm 16111 has a first stop step A3 on its surface facing the second flexible mechanism 162. The first stop step A3 has a stop surface A31 facing the base 13. The first stop step A3 is located at one end of the stop plane A2 away from the matching inclined surface A1 and is connected to the stop plane A2. The first swing arm body 1130 has a second stop step B3. The second stop step B3 is located at one end of the first area B1 away from the second area B2 and is connected to the first area B1. In the unfolded state, the second stop step B3 stops at the stop surface A31.

[0191] Of course, the present application is not limited thereto. In other embodiments, please refer to Fig.17 , Fig.17A schematic diagram of the cooperation between the second first damping mechanism 16 and the first swing arm 113 in the expanded state provided in an embodiment of the present application. There are two first stop steps A3. One of the first stop steps A3 is located at the end of the stop plane A2 away from the matching inclined surface A1 and connected to the stop plane A2. The other first stop step A3 is located at the end of the matching inclined surface A1 away from the stop plane A2. The first swing arm body 1130 has two second stop steps B3. One of the second stop steps B3 is located at the end of the first area B1 away from the second area B2 and connected to the first area B1. The other second stop step B3 is located at the end of the second area B2 away from the first area B1 and connected to the second area B2.

[0192] In the unfolded state, the two second stop steps B3 correspond to the two first stop steps A3 one by one, and each second stop step B3 abuts against the abutment surface of the corresponding first stop step A3.

[0193] In other embodiments, only the first stopping step A3 may be disposed at the end of the matching inclined surface A1 away from the stopping plane A2, and the second stopping step B3 may be disposed at the end of the second area B2 away from the first area B1.

[0194] In this embodiment, a first stop step A3 is formed on the surface of the elastic arm 16111 facing the second flexible mechanism 162, and a second stop step B3 is formed on the first swing arm body 1130. In the unfolded state, the second stop step B3 abuts against the stop surface A31 of the first stop step A3. Thus, the second stop step B3 can be used to prevent the transitional unfolding of the rotating shaft mechanism 1, thereby preventing the folding screen 20 from being pulled due to the transitional unfolding of the rotating shaft mechanism 1, which is beneficial to improving the service life of the folding screen 20 and also beneficial to improving the unfolding flatness of the folding screen 20 in the unfolded state. In addition, when the foldable electronic device 100 falls from one side of the base 13 in the folded state, the second stop step B3 can be used to stop the stop surface A31 of the first stop step A3 to limit the transitional movement of the first connecting member 111 downward along the first swing arm 113, so that on the one hand, it is helpful to at least avoid the failure and fracture of the components of the rotating shaft mechanism 1 such as the first connecting member 111, the first door panel 114, the first swing arm 113, etc. caused by the falling process, and on the other hand, it is helpful to at least avoid the deformation of the folding screen 20 caused by the pulling of the first door panel 114 during the falling process, and at least avoid the failure of the folding screen 20 to a certain extent. In addition, it can also prevent the problem of the first shell 2 and the third shell 3 colliding with the base 13 when the foldable electronic device 100 falls from one side of the base 13 in the folded state, and it is helpful to avoid the problem of the first shell 2 and the third shell 3 colliding with the base 13 by reasonably designing the structures of the first shell 2 and the third shell 3 on the basis of the cooperation between the second stop step B3 and the first stop step A3.

[0195] On this basis, in order to further improve the reliability of the cooperation between the first stop step A3 and the second stop step B3, the elastic member 1611 extends along the second direction F.

[0196] See also Fig.18 , Fig.18 For Fig.12 The relationship between the force and deformation of the elastic member 1611 extending along the second direction F is shown in FIG. Fig.18 (a) is a relationship diagram between the force and deformation of the elastic member 1611 in the Y-axis direction; Fig.18 (b) is a graph showing the relationship between the force applied to the elastic member 1611 in the second direction F and the amount of deformation. Fig.18It can be found from (a) and (b) in that when the same deformation is achieved, the force required to drive the elastic member 1611 to deform in the Y-axis direction is much smaller than the force required to drive the elastic member 1611 to deform in the second direction F. Taking the deformation of 0.4 mm as an example, the force required to drive the elastic member 1611 to deform in the Y-axis direction is 100 N, and the force required to drive the elastic member 1611 to deform in the second direction F is 3000 N.

[0197] Therefore, when the elastic member 1161 extends along the second direction F, the rigidity of the elastic member 1611 in the second direction F is much greater than the rigidity of the elastic member 1611 in the Y-axis direction. The rigidity of the elastic member 1611 in the Y-axis direction is small, so that the elastic member 1611 is easily deformed in the Y-axis direction, so that the elastic member 1611 cooperates with the second flexible mechanism 162 to apply a damping force to the first swing arm 113; the rigidity of the elastic member 1611 in the second direction F is large, and the elastic member 1611 is less likely to deform in the second direction F, which is conducive to improving the reliability of the cooperation between the first stop step A3 and the second stop step B3.

[0198] It is worth noting that, in other examples, the elastic member 1611 may also have other extension paths, and this application does not impose any specific limitation thereto.

[0199] See also Fig.19 , Fig.19 Based on Fig.12 The schematic diagram of the first damping mechanism 16 is shown in FIG. 161 . The first flexible mechanism 161 further includes a rigid frame 1612 .

[0200] The rigid frame 1612 is fixed to the first connecting member 111. Exemplarily, the connection method between the rigid frame 1612 and the first connecting member 111 includes but is not limited to gluing, welding, clamping or screw connection. Another exemplary method is that the rigid frame 1612 and the first connecting member 111 can be an integrated structure, that is, the rigid frame 1612 and the first connecting member 111 can be an integrally formed part, which is not only conducive to improving the connection strength between the rigid frame 1612 and the first connecting member 111, but also can simplify the processing technology and reduce the manufacturing cost.

[0201] Along the Y-axis direction, the rigid frame 1612 is located on a side of the elastic member 1611 away from the second flexible mechanism 162. The fixed end 16112 of the elastic member 1611 is fixed to the fixed frame 1612, so that the elastic arm 16111 is spaced apart from the first connecting member 111 in a direction perpendicular to the second direction F and perpendicular to the Y-axis, so as to facilitate elastic deformation of the elastic arm 16111.

[0202] In other examples, the fixed end 16112 may also be directly fixed to the first connecting member 111 , as long as the fixed end 16112 and the first connecting member 111 are relatively fixed.

[0203] On this basis, in some embodiments, please continue to refer to Fig.19 The rigid frame 1612 includes a first rigid block 16121 , a second rigid block 16122 and a third rigid block 16123 .

[0204] The first rigid block 16121 is fixed to the first connecting member 111. The shape of the first rigid block 16121 includes but is not limited to a cube, a triangular prism, a rectangular parallelepiped, a semi-cylindrical shape or a special shape.

[0205] The first rigid block 16121 is distributed and connected to the fixed end 16112 in the Y-axis direction. Exemplarily, the first rigid block 16121 extends along the Y-axis direction.

[0206] Please continue reading Fig.19 , the second rigid block 16122 is fixed to the first connecting member 111. The shape of the second rigid block 16122 includes but is not limited to a cube, a triangular prism, a rectangular parallelepiped, a semi-cylindrical or a special shape. The second rigid block 16122 is fixed to an end of the first rigid block 16121 away from the fixed end 16112. The second rigid block 16122 extends in the second direction F.

[0207] The third rigid block 16123 is fixed to the first connecting member 111. The shape of the third rigid block 16123 includes but is not limited to a cube, a triangular prism, a rectangular parallelepiped, a semi-cylindrical shape or a special shape.

[0208] The third rigid block 16123 is arranged opposite to the first rigid block 16121 in the second direction F, and the third rigid block 16123 is located on the side of the second rigid block 16122 away from the first rigid block 16121 and is connected to the second rigid block 16122. In the second direction F, the third rigid block 16123 is located as a whole on the side of the elastic arm 16111 away from the fixed end 16112. In this way, when the hinge mechanism 1 switches between the unfolded state and the folded state, the third rigid block 16123 can avoid the elastic arm 16111 to prevent the third rigid block 16123 from interfering with the elastic deformation of the elastic arm 16111.

[0209] On this basis, please continue to refer to Fig.19 The first damping mechanism 16 further includes a rigid fixing block 163. The rigid fixing block 163 is connected between the third rigid block 16123 of the first flexible mechanism 161 and the third rigid block 16123 of the second flexible mechanism 162.

[0210] Through the above analysis, it can be found that the setting of the second rigid block 16122 and the third rigid block 16123 in the rigid frame 1612, as well as the setting of the rigid fixing block 163, can connect the first damping mechanism 16 as a whole, thereby facilitating the disassembly and assembly of the first damping mechanism 16 and the first connecting member 111.

[0211] It is understandable that the structure of the rigid frame 1612 is not limited thereto, and in other embodiments, the rigid frame 1612 may include only the first rigid block 16121, but not the second rigid block 16122 and / or the third rigid block 16123. Similarly, the first damping mechanism 16 may not include the rigid fixing block 163.

[0212] Please continue reading Fig.19 , the first flexible mechanism 161 also includes a rigidity reinforcement structure 1613. Since the rigid frame 1612 is located on the side of the elastic member 1611 away from the second flexible mechanism 162, when the rigidity reinforcement structure 1613 is connected between the rigid frame 1612 and the elastic arm 16111, the rigidity of the first flexible mechanism 161 in the Y-axis direction can be increased, and the ability of the elastic arm 16111 to resist elastic deformation can be improved, so that when the hinge mechanism 1 switches between the unfolded state and the folded state, on the one hand, the damping force when the elastic arm 16111 cooperates with the first swing arm 113 can be increased, and the damping effect can be improved, and on the other hand, the elastic deformation of the elastic arm 16111 along the Y-axis direction can be reduced, and the problem of the elastic arm 16111 being broken due to the transitional deformation of the elastic arm 16111 can be prevented, which is conducive to improving the service life of the elastic arm 16111.

[0213] In some embodiments, during the switching process between the unfolded state and the folded state of the rotating shaft mechanism 1, the stiffness coefficient of the first flexible mechanism 161 is a constant value. That is to say, during the switching process between the unfolded state and the folded state of the rotating shaft mechanism 1, the reaction force applied by the first swing arm 113 to the first flexible mechanism 161 is in a linear relationship with the deformation of the first flexible mechanism 161. In this way, the first flexible mechanism 161 is a constant stiffness mechanism. This is conducive to improving the damping feel of the user during the switching process between the unfolded state and the folded state of the rotating shaft mechanism 1, thereby improving the user's experience.

[0214] When actually measuring the deformation of the first flexible mechanism 161 , the deformation can be characterized by the distance between any point on the elastic arm 16111 , for example, one end of the elastic arm 16111 away from the fixed end 16112 and the fixed end 16112 in the Y-axis direction.

[0215] In order to achieve the constant stiffness setting of the first flexible mechanism 161, based on the above embodiments, in some embodiments, please continue to refer to Fig.19The rigidity reinforcement structure 1613 includes a plurality of flexible beams 1615. Each flexible beam 1615 is a straight beam. That is, each flexible beam 1615 extends in a straight line. The plurality of flexible beams 1615 are arranged in parallel and at intervals. Each flexible beam 1615 is arranged obliquely relative to the second direction F. The two ends of each flexible beam 1615 along its own extension direction are directly connected to the elastic arm 16111 and the second rigid block 16122 respectively.

[0216] In this embodiment, the two ends of the flexible beam 1615 along its own extension direction are connected to the elastic arm 16111 and the second rigid block 16122 respectively, and the flexible beam 1615 is inclined relative to the second direction F, which can facilitate the flexible beam 1615 to be driven by the elastic arm 16111 to deform in the Y-axis direction when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, so that the rigidity of the plurality of flexible beams 1615 in the Y-axis direction as a whole is within a reasonable range. On the one hand, compared with not setting the rigidity reinforcement structure 1613, the rigidity of the first flexible mechanism 161 in the Y-axis direction can be increased, and the ability of the elastic arm 16111 to resist elastic deformation can be improved, so that when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, the damping force when the elastic arm 16111 cooperates with the first swing arm 113 is increased, and the damping effect is improved; on the other hand, it can also prevent the rigidity of the rigidity reinforcement structure itself in the Y-axis direction from being excessively large, which will cause excessive interference to the elastic deformation of the elastic arm 16111, which is conducive to improving the working stability of the rotating shaft mechanism 1.

[0217] The number of flexible beams 1615 includes, but is not limited to, two, three, four, five, or six. Fig.19 In the specific example shown, there are four flexible beams 1615. In other examples, there may be one flexible beam 1615.

[0218] In addition, the flexible beam 1615 is not limited to being connected to the second rigid block 16122. In other examples, the flexible beam 1615 can be connected to the first rigid block 16121 or the third rigid block 16123 according to the change in inclination angle and length, as long as the flexible beam 1615 is connected between the elastic arm 16111 and the rigid frame 1612.

[0219] Based on the above embodiments, in other embodiments, please refer to Fig. 20 , Fig. 20 Schematic diagram of the third first damping mechanism 16 provided in the embodiment of the present application. The rigidity reinforcement structure 1613 includes a flexible beam unit 1614. The two ends of the flexible beam unit 1614 along its own extension direction are respectively connected to the rigid frame 1612 and the elastic arm 16111.

[0220] Please continue reading Fig. 20, each flexible beam unit 1614 includes a plurality of flexible beams 1615 .

[0221] The flexible beam 1615 in the flexible beam unit 1614 includes, but is not limited to, a straight line or an arc shape.

[0222] In the extension direction of the flexible beam unit 1614 itself, a plurality of flexible beams 1615 are connected end to end in sequence, and the extension directions of two adjacent flexible beams 1615 are different.

[0223] In this embodiment, in the flexible beam unit 1614, the extension directions of two adjacent flexible beams 1615 are different so that the junction of the two adjacent flexible beams 1615 can form a "corner", which is convenient for the flexible beam unit 1614 to be driven by the elastic arm 16111 to deform in the Y-axis direction when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, so that the stiffness of the flexible beam unit 1614 in the Y-axis direction is within a reasonable range. On the one hand, compared with not setting the stiffness reinforcement structure 1613, the stiffness of the first flexible mechanism 161 in the Y-axis direction can be increased, and the ability of the elastic arm 16111 to resist elastic deformation can be improved, so that when the rotating shaft mechanism 1 switches between the unfolded state and the folded state, the damping force when the elastic arm 16111 cooperates with the first swing arm 113 is increased, and the damping effect is improved; on the other hand, it can also prevent the excessive stiffness of the stiffness reinforcement structure itself in the Y-axis direction from causing excessive interference with the elastic deformation of the elastic arm 16111, which is conducive to improving the working stability of the rotating shaft mechanism 1.

[0224] The number of the flexible beam unit 1614 can be multiple or one. "Multiple" means two or more. Fig. 20 In the specific example shown, in the rigidity reinforcement structure 1613, there are two flexible beam units 1614. The two flexible beam units 1614 are symmetrically arranged in the second direction F.

[0225] On this basis, in some embodiments, the plurality of flexible beams 1615 of the flexible beam unit 1614 includes a first flexible beam 16151 and a second flexible beam 16152 .

[0226] The number of the first flexible beams 16151 includes but is not limited to one or more.

[0227] The first flexible beam 16151 extends along the Y-axis direction. In this way, the first flexible beam 16151 extending along the Y-axis direction may have a stiffness in the Y-axis direction greater than a stiffness in the second direction F, which is beneficial to ensure the stiffness of the flexible beam unit 1614 .

[0228] The number of the second flexible beam 16152 includes but is not limited to one or more. When there are multiple first flexible beams 16151 and second flexible beams 16152, the multiple second flexible beams 16152 and the multiple first flexible beams 16151 are alternately arranged in the extension direction of the flexible beam unit 1614 itself.

[0229] In the extension direction of the flexible beam unit 1614 itself, the second flexible beam 16152 is adjacent to the first flexible beam 16151. The second flexible beam 16152 extends along the second direction F.

[0230] In this way, the stiffness of the second flexible beam 16152 extending in the second direction F in the second direction F can be greater than the stiffness in the Y-axis direction, and the second flexible beam 161522 can be more easily deformed in the Y-axis direction. The setting of the second flexible beam 16152 can facilitate the flexible beam unit 1614 to be driven by the elastic arm 16111 to generate deformation in the Y-axis direction when the hinge mechanism 1 switches between the unfolded state and the folded state.

[0231] Please continue reading Fig. 20 Each flexible beam unit 1614 is directly connected between the elastic arm 16111 and the rigid frame 1612. In each flexible beam unit 1614, there are two flexible beams 1615, which are a first flexible beam 16151 and a second flexible beam 16152.

[0232] One end of the first flexible beam 16151 of each flexible beam unit 1614 is directly fixed to the elastic arm 16111. One end of the second flexible beam 16152 of one flexible beam unit 1614 is directly fixed to the third rigid block 16123. One end of the second flexible beam 16152 of another flexible beam unit 1614 is directly fixed to the first rigid block 16121. The other end of the second flexible beam 16152 of each flexible beam unit 1614 is connected to the other end of the corresponding first flexible beam 16151. As a result, the structure of the rigidity reinforcement structure 1613 is simple.

[0233] In other embodiments where the stiffness reinforcement structure 1613 includes a flexible beam unit 1614, see Fig.21 , Fig.21 Schematic diagram of the fourth first damping mechanism 16 provided in the embodiment of the present application. Fig. 20The difference of the illustrated embodiment is that in the flexible beam unit 1614, the number of the flexible beams 1615 is three. And among the three flexible beams 1615, there are two first flexible beams 16151 and one second flexible beam 16152. The two first flexible beams 16151 are spaced apart in the Y-axis direction and staggered in the second direction F. One end of one of the first flexible beams 16151 is directly fixed to the elastic arm 16111. One end of the other first flexible beam 16151 is connected to the second rigid block 16122. The second flexible beam 16152 is connected between the other end of one of the first flexible beams 16151 and the other end of the other first flexible beam 16151. As a result, the structure of the rigidity reinforcement structure 1613 is simple.

[0234] The two flexible beam units 1614 are spaced apart in the second direction F. The extension tracks of the two flexible beam units 1614 are consistent.

[0235] In some other embodiments where the stiffness reinforcement structure 1613 includes a flexible beam unit 1614, see Fig. 22 , Fig. 22 This is a schematic diagram of the fifth first damping mechanism 16 provided in the embodiment of the present application. Figure 20-21 The difference of the illustrated embodiment is that the first flexible beam 16151 extends along the Y-axis direction. The flexible beam unit 1614 does not include the second flexible beam 16152 , but includes a third flexible beam 16153 and a fourth flexible beam 16154 .

[0236] In the extension direction of the flexible beam unit 1614, the third flexible beam 16153 and the fourth flexible beam 16154 are both adjacent to the first flexible beam 16151. The fourth flexible beam 16154 and the third flexible beam 16153 are located at both ends of the first flexible beam 16151 in the Y-axis direction. The third flexible beam 16153 and the fourth flexible beam 16154 are both inclined relative to the second direction F, and the inclination directions of the two are opposite.

[0237] exist Fig. 22 In the specific example shown, the angle between the third flexible beam 16153 and the first flexible beam 16151 is equal to the angle between the fourth flexible beam and the first flexible beam 16151. In other examples, the angle between the third flexible beam 16153 and the first flexible beam 16151 is equal to the angle between the fourth flexible beam 16154 and the first flexible beam 16151.

[0238] Please continue reading Fig. 22In the flexible beam unit 1614, the first flexible beam 16151, the third flexible beam 16153 and the fourth flexible beam 16154 are all one. The third flexible beam 16153 is connected to the second rigid block 16122. The fourth flexible beam 16154 is connected to the elastic arm 16111.

[0239] In other examples, in the flexible beam unit 1614, there are multiple first flexible beams 16151, third flexible beams 16153 and fourth flexible beams 16154, and the multiple first flexible beams 16151, third flexible beams 16153 and fourth flexible beams 16154 are arranged in the extension direction of the flexible beam unit 1614 in the order of the third flexible beam 16153, the first flexible beam 16151, the fourth flexible beam 16154 and the first flexible beam 16151.

[0240] Please continue reading Fig. 22 In the first flexible mechanism 161, there are two flexible beam units 1614. The two flexible beam units 1614 are spaced apart in the second direction F and are symmetrically arranged.

[0241] See also Fig.23 , Fig.23 This is a schematic diagram of a sixth first damping mechanism 16 provided in an embodiment of the present application. In this embodiment, the rigidity reinforcement structure 1613 further includes a first rigid connection block 1616 .

[0242] The material of the first rigid connection block 1616 includes but is not limited to metal or plastic. The first rigid connection block 1616 includes but is not limited to a cube, a rectangular parallelepiped, a triangular prism, a hexagonal prism or a special shape.

[0243] The first rigid connection block 1616 is located on a side of the elastic arm 16111 away from the second flexible mechanism 162 and is connected to the elastic arm 16111. The connection between the first rigid connection block 1616 and the elastic arm 16111 includes but is not limited to gluing, welding, clamping or screw connection.

[0244] Flexible beam units 1614 are arranged on both sides of the first rigid connection block 1616 in the second direction F. The flexible beam units 1614 on both sides of the first rigid connection block 1616 are symmetrically arranged relative to the first rigid connection block 1616. Fig. 22 In the specific example shown, there are two flexible beam units 1614 on both sides of the first rigid connection block 1616. The two flexible beam units 1614 on the same side of the first rigid connection block 1616 are spaced apart in the Y-axis direction. In other examples, there may be three, four, five or one flexible beam units 1614 on both sides of the first rigid connection block 1616.

[0245] Please continue reading Fig.23, the first flexible beam 16151 and the second flexible beam 16152 in the flexible beam unit 1614 are both multiple. The multiple second flexible beams 16152 and the multiple first flexible beams 16151 are alternately arranged in the extension direction of the flexible beam unit 1614. The multiple second flexible beams 16152 are arranged side by side in the Y-axis direction. A first flexible beam 16151 is connected between two adjacent second flexible beams 16152. Among the two second flexible beams 16152 that are farthest apart, one of the second flexible beams 16152 is connected to the first rigid connection block 1616. The other second flexible beam 16152 is connected to the second rigid block 16122 or the first rigid block 16121.

[0246] Based on the above embodiments, in some further embodiments, please refer to Fig.24 , Fig.24 This is a schematic diagram of the seventh first damping mechanism 16 provided in the embodiment of the present application. Fig.19 The difference of the embodiment shown is that the stiffness reinforcement structure 1613 includes a first flexible beam 16151 and a third flexible beam 16153. The first flexible beam 16151 and the third flexible beam 16153 are no longer connected end to end. The first flexible beam 16151 is a straight line. The third flexible beam 16153 includes but is not limited to a straight line or an arc.

[0247] One end of the first flexible beam 16151 in the Y-axis direction is connected to the elastic arm 16111. The third flexible beam 1615 is arranged obliquely relative to the second direction F. In the second direction F, the third flexible beam 1615 is between the first flexible beam 16151 and the first rigid block 16121, and the third flexible beam 16153 is connected between the first flexible beam 16151 and the first rigid block 16121.

[0248] exist Fig.24 In the specific example shown, there are a plurality of third flexible beams 16153 arranged in parallel. In other examples, there may be only one third flexible beam 16153.

[0249] In addition, the third flexible beam 16153 is not limited to being connected to the first rigid block 16121. When the inclination angle, length, etc. of the third flexible beam 16153 are changed, the third flexible beam 16153 may also be connected to the second rigid block 16122. Moreover, in the second direction F, when the third flexible beam 16153 is between the first flexible beam 16151 and the third rigid block 16123, the third flexible beam 16153 is connected to the third rigid block 16123 or the second rigid block 16122.

[0250] The present application is not limited to the implementation method that the first flexible mechanism 161 is a constant stiffness mechanism as described above. In other embodiments, the first flexible mechanism 161 is a variable stiffness mechanism. Specifically, during the switching process between the unfolded state and the folded state of the rotating shaft mechanism 1, the stiffness coefficient of the first flexible mechanism 161 is a variable amount. In other words, during the switching process between the unfolded state and the folded state of the rotating shaft mechanism 1, the relationship between the reaction force applied by the first swing arm 113 to the first flexible mechanism 161 and the deformation amount of the first flexible mechanism 161 is a nonlinear relationship.

[0251] Illustratively, during the switching of the hinge mechanism 1 between the unfolded state and the folded state, the relationship between the force applied by the first swing arm 113 to the first flexible mechanism 161 and the deformation amount of the first flexible mechanism 161 includes but is not limited to curves, broken lines, and a combination of curves and broken lines, etc., and the present application does not impose specific restrictions on this.

[0252] On this basis, in order to obtain the above-mentioned variable stiffness mechanism, please refer to Fig.25 , Fig.25 Schematic diagram of the eighth first damping mechanism 16 provided in the embodiment of the present application. The stiffness reinforcement structure 1613 includes a flexible beam 1615. The flexible beam 1615 is arc-shaped, that is, the flexible beam 1615 extends in an arc shape. The flexible beam 1615 is directly connected between the elastic arm 16111 and the second rigid block 16122.

[0253] Please continue reading Fig.25 There are multiple flexible beams 1615, and the multiple flexible beams 1615 are spaced apart in the second direction F. Fig.25 In the specific example shown, there are three flexible beams 1615. In other examples, there may be four or five flexible beams 1615.

[0254] On this basis, in order to obtain the above-mentioned variable stiffness mechanism, please refer to Fig.26 , Fig.26 Schematic diagram of the ninth first damping mechanism 16 provided in the embodiment of the present application. Fig.25 The difference of the embodiment shown is that there are two flexible beams 1615. One of the flexible beams 1615 is connected between the elastic arm 16111 and the first rigid block 16121. The other flexible beam 1615 is connected between the elastic arm 16111 and the third rigid block 16123. The two flexible beams 1615 are symmetrically arranged in the second direction F.

[0255] On this basis, in order to obtain the above-mentioned variable stiffness mechanism, please refer to Fig. 27 , Fig. 27 Schematic diagram of the tenth first damping mechanism 16 provided in the embodiment of the present application. Fig.26 The difference of the illustrated embodiment is that the rigidity reinforcement structure 1613 further includes a second rigid connection block 1617 .

[0256] The material of the second rigid connection block 1617 includes but is not limited to metal or plastic. The second rigid connection block 1617 includes but is not limited to a cube, a rectangular parallelepiped, a triangular prism, a hexagonal prism or a special shape.

[0257] The second rigid connecting block 1617 is located on a side of the elastic arm 16111 away from the second flexible mechanism 162 and is connected to the elastic arm 16111 .

[0258] A plurality of flexible beams 1615 extending in an arc shape are arranged on both sides of the second rigid connection block 1617 in the second direction F. The flexible beams 1615 on both sides of the second rigid connection block 1617 are symmetrically arranged relative to the second rigid connection block 1617. Fig. 27 In the specific example shown, there are two flexible beams 1615 on both sides of the second rigid connection block 1617. The two flexible beams 1615 on the same side of the second rigid connection block 1617 are spaced apart in the Y-axis direction.

[0259] Each flexible beam 1615 is connected between the second rigid connection block 1617 and the first rigid block 16121 or the third rigid block 16123 .

[0260] On this basis, in order to obtain the above-mentioned variable stiffness mechanism, please refer to Fig.28 , Fig.28 Schematic diagram of the eleventh first damping mechanism 16 provided in the embodiment of the present application. Fig. 27 The difference between the embodiments shown is that the flexible beam 1615 is between the first rigid block 16121 and the second rigid connection block 1617, or the flexible beam 1615 is between the third rigid block 16123 and the second rigid connection block 1617. There are multiple flexible beams 1615, and the multiple flexible beams 1615 are arranged in parallel. The flexible beam 1615 is a straight beam or a curved beam.

[0261] The above text has described in detail the specific structure of the stiffness reinforcement structure 1613. It is understood that in some other embodiments, please refer to Fig.29 , Fig.29 This is a schematic diagram of a twelfth first damping mechanism 16 provided in an embodiment of the present application; the stiffness reinforcement structure 1613 may not be provided in the first flexible mechanism 161.

[0262] Based on any of the above embodiments, please refer to Fig.30 , Fig.30 Based on Fig. 9The exploded schematic diagram of the partial structure of the rotating shaft mechanism 1 shown. The base 13 has a first arc-shaped groove 133. The center line of the first arc-shaped groove 133 extends along the Y-axis direction. The first arc-shaped groove 133 is respectively provided with first protruding ribs 134 on the opposite groove walls in the Y-axis direction. The surface of each first protruding rib 134 facing the groove bottom wall of the first arc-shaped groove 133 is a first arc-shaped surface. The center line of the first arc-shaped surface is colinear with the center line of the first arc-shaped groove 133. Each first protruding rib 134 cooperates with the first arc-shaped groove 133 to define a first circular arc groove 135.

[0263] One end of the first active swing arm 112 adjacent to the base 13 has a first arc-shaped rib 1122. The extension path of the first arc-shaped rib 1122 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), which is not specifically limited here. Fig.30 In the embodiment shown, the extension path of the first arc-shaped rib 1122 is a minor arc. The first arc-shaped rib 1122 can be accommodated in the first arc groove 135 and can rotate around the center line of the first arc groove 135. Thus, the hinge between the first active swing arm 112 and the base 13 is realized. This structure is simple and easy to implement.

[0264] Please continue reading Fig.30 The first active swing arm 112 is also provided with a third shaft hole 1123. The first connecting member 111 is provided with a fourth shaft hole 1115. The rotating shaft mechanism 1 also includes a pivot shaft 117. The pivot shaft 117 is passed through the fourth shaft hole 1115 and the third shaft hole 1123. Thus, the first connecting member 111 and the first active swing arm 112 are rotatably connected.

[0265] Please continue to refer to 30, a first arc-shaped long groove 1117 is provided on one end surface of the first connecting member 111 along the Y-axis direction. The center line of the first arc-shaped long groove 1117 extends along the Y-axis direction. Fig.31 , Fig.31 Based on Fig. 9 The diagram of the coordination of the first door panel 114, the first connecting member 111 and the first hinge member 115 in the rotating shaft mechanism 1 is shown. The first door panel 114 is provided with a second arc-shaped rib 1141. The extension path of the second arc-shaped rib 1141 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), which is not specifically limited here. Fig.30In the illustrated embodiment, the extension path of the second arc-shaped rib 1141 is a minor arc. The second arc-shaped rib 1141 can be accommodated in the first arc-shaped slot 1117 and can rotate around the center line of the first arc-shaped slot 1117. Thus, the hinge connection between the first door panel 114 and the first connecting member 111 is achieved.

[0266] Please continue reading Fig.30 A guide block 1142 is fixed on a side surface of the first door panel 114 which is away from the support surface M31 of the first door panel 114. A sliding groove 11421 is formed on the guide block 1142. The first hinge 115 is inserted into the sliding groove 11421, thereby slidingly cooperating with the first door panel 114.

[0267] Please continue reading Fig.30 The base 13 has a second arc-shaped groove 136. The center line of the second arc-shaped groove 136 extends along the Y-axis direction. The second arc-shaped groove 136 is provided with second protruding ribs 137 on the opposite groove walls in the Y-axis direction. The surface of each second protruding rib 137 facing the groove bottom wall of the second arc-shaped groove 136 is a second arc-shaped surface. The center line of the second arc-shaped surface is colinear with the center line of the second arc-shaped groove 136. Each second protruding rib 137 cooperates with the second arc-shaped groove 136 to define a second arc groove 138.

[0268] The end of the first hinge 115 adjacent to the base 13 has a third arc-shaped rib 1151. The extension path of the third arc-shaped rib 1151 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), which is not specifically limited here. Fig.30 In the embodiment shown, the extension path of the third arc-shaped rib 1151 is a minor arc. The third arc-shaped rib 1151 can be accommodated in the second arc groove 138 and can rotate around the center line of the second arc groove 138. Thus, the hinge between the first hinge 115 and the base 13 is realized. This structure is simple and easy to implement.

[0269] Based on any of the above embodiments, please refer to Figure 8 and Fig. 9 The second rotating assembly 12 also includes a second damping mechanism 17 .

[0270] The second damping mechanism 17 is fixed to the second connecting member 121. The connection relationship between the second damping mechanism 17 and the second connecting member 121 includes but is not limited to clamping, welding, screw connection or gluing.

[0271] The second damping mechanism 17 cooperates with the second swing arm body 1230 to provide a damping force for the rotation of the second swing arm 123 relative to the base 13 .

[0272] In this way, by fixing the second damping mechanism 17 on the second connecting member 121, and utilizing the cooperation between the second damping mechanism 17 and the second swing arm body 1230 to provide a damping force for the rotation of the second swing arm 123 relative to the base 13, the structure of the second damping mechanism 17 will not be limited by the size of the internal space of the base 13, which is conducive to reasonably optimizing the structure of the second damping mechanism 17 according to actual needs, providing the hinge mechanism 1 with a better damping feel and hovering effect, and will not increase the thickness of the base 13, which is conducive to realizing the thinness of the hinge mechanism 1.

[0273] It is understandable that when the damping force applied by the first damping mechanism 16 to the first swing arm 113 and the damping force applied by the second damping mechanism 17 to the second swing arm 123 can meet the requirements of the damping feel and the hovering effect, the first damping device 14 and the second damping device 15 may not be provided in the rotating shaft mechanism 1. Exemplarily, when the first damping mechanism 16 and the second damping mechanism 17 are provided with the above-mentioned stiffness reinforcement structure 1613, the first damping device 14 and the second damping device 15 may not be provided in the rotating shaft mechanism 1.

[0274] Please continue reading Figure 8 and Fig. 9 In order to realize the linkage between the first housing 2 and the second housing 3, the first rotating part 1131 is configured as a first gear, and the second rotating part 1231 is configured as a second gear. The first gear and the second gear can be meshed and matched.

[0275] Specifically, since the first swing arm 113 and the second swing arm 123 are located on opposite sides of the base, in order not to affect the cooperation between the first swing arm 113 and the first damping mechanism 16 on the first connecting member 111, and the cooperation between the second swing arm 123 and the second damping mechanism 17, the first gear and the second gear are spaced apart in the X-axis direction, and an even number of meshing third gears 18 are provided between the first gear and the second gear, and each third gear 18 is rotatably fixed to the base 13.

[0276] The first gear and the second gear are meshed with each other through an even number of third gears 18, thereby realizing the linkage of the first swing arm 113 and the second swing arm 123. In this way, when the user applies a force to one of the first shell 2 and the second shell 3, the two shells can be driven to move simultaneously.

[0277] exist Figure 8 and Fig. 9 In the specific example shown, the third gear is two. In other examples, the third gear may also be four, six or eight.

[0278] It is worth noting that the specific structure of the second rotating assembly 12 and the connection relationship between the various components can refer to the first rotating assembly 11 mentioned above and will not be repeated here.

[0279] Example 2: Please refer to Fig.32 , Fig.33 Fig.34 , Fig.32 A partial structural schematic diagram of the rotating shaft mechanism 1 provided in some further embodiments of the present application, in which the first rotating assembly 11 is in a folded state and the second rotating assembly 12 is in an unfolded state;

[0280] Fig.33 Based on Fig.32 A schematic diagram of the cooperation between the first damping mechanism 16 and the first swing arm 113 in the rotating shaft mechanism 1 in the unfolded state; Fig.34 Based on Fig.32 The first damping mechanism 16 and the first swing arm 113 in the rotating shaft mechanism 1 are shown in the figure in the folded state. Figure 8-Figure 31 The difference of the illustrated embodiment is that the fixed end 16112 is located at an end of the elastic arm 16111 away from the base 13 in the second direction F. In the second direction F and in a direction away from the base 13 , the matching slope A1 is inclined toward the second flexible mechanism 162 .

[0281] The stop plane A2 is located at the end of the matching inclined surface A1 away from the base 13 and is connected to the matching inclined surface A1. In the second direction F and in the direction away from the base 13, the stop plane A2 is inclined toward the direction away from the second flexible mechanism 162; or, the stop plane A2 is perpendicular to the Y-axis direction. In the unfolded state, the stop plane A2 abuts against the second area B2 of the matching portion 11301.

[0282] In this way, the extension direction of the stop plane A2 is different from the extension direction of the mating slope A1. Therefore, when the hinge mechanism 1 is in the unfolded state, the abutment relationship between the stop plane A2 and the second area B2 of the mating part 11301 can prevent the mating part 11301 from showing a "downhill" trend along the mating slope A1, thereby preventing the first swing arm 113 from having a tendency to switch to the folded state, which is beneficial to improving the stability of the hinge mechanism 1 in the unfolded state.

[0283] Please continue reading Fig.33 and Fig.34, the stop surface A31 of the first stop step A3 faces away from the base 13. The second stop step B3 is located at the end of the first area B1 away from the second area B2, and is connected to the first area B1. In the folded state, the second stop step B3 stops at the stop surface A31. In this way, in the folded state, the second stop step B3 and the first stop step A3 are used to prevent the transitional folding of the hinge mechanism 1, thereby preventing the folding screen from being pulled due to the transitional folding of the hinge mechanism 1, which is beneficial to improving the service life of the folding screen 20.

[0284] Please continue reading Fig.33 and Fig.34 In this embodiment, the third rigid block 16123 is not provided in the rigidity reinforcement structure 1613. The first rigid block 16121 in the first flexible mechanism 161 and the first rigid block 16121 in the second flexible mechanism 162 are connected through the rigid fixing block 163, so that the first damping mechanism 16 is connected as a whole, thereby facilitating the disassembly and assembly of the first damping mechanism 16 and the first connecting member 111.

[0285] Example 2

[0286] The difference between Example 2 and Example 1 is that when the hinge mechanism 1 is in the unfolded state, the folded state, and switching between the unfolded state and the folded state, the damping force applied by the first flexible mechanism 161 to the first swing arm 113 is constant, that is, the damping force is a constant force.

[0287] See also Fig.35 , Fig.35 This is a schematic diagram of a thirteenth first damping mechanism 16 provided in an embodiment of the present application. The stiffness reinforcement structure 1613 includes: a positive stiffness structure 16131 and a bistable structure 16132 .

[0288] The positive stiffness structure 16131 is connected to the bistable structure 16132. The reaction force generated by the positive stiffness structure 16131 increases with the increase of the deformation of the first flexible mechanism 161, and the reaction force generated by the bistable structure 16132 changes periodically with the increase of the deformation of the first flexible mechanism 161.

[0289] When the hinge mechanism 1 is in the unfolded state, the folded state, and the switching process between the unfolded state and the folded state, the combined force of the positive stiffness structure 16131, the bistable structure 16132, and the elastic arm 16111 is a constant value.

[0290] Please continue reading Fig.35In this embodiment, the elastic arm 16111 has a matching slope A1, and the matching slope A1 is provided here to cooperate with the positive stiffness structure 16131 and the bistable structure 16132, so that the first flexible mechanism 161 outputs a constant force. In other examples, the matching slope A1 may not be provided on the elastic arm 16111, for example, the surface of the elastic arm 16111 that cooperates with the first swing arm body 1130 is a plane perpendicular to the Y-axis direction. At this time, the positive stiffness structure 16131 cooperates with the bistable structure 16132, so that the first flexible mechanism 161 outputs a constant force.

[0291] See also Fig.35 The bistable structure 16132 includes a third rigid connecting block 1618 and a plurality of first compliant beams 161321 .

[0292] The material of the third rigid connection block 1618 includes but is not limited to metal or plastic. The third rigid connection block 1618 includes but is not limited to a cube, a rectangular parallelepiped, a triangular prism, a hexagonal prism or a special shape.

[0293] The third rigid connecting block 1618 is located on a side of the elastic arm 16111 away from the second flexible mechanism 162 and is connected to the elastic arm 16111 .

[0294] Two first compliant beams 161321 are respectively disposed on both sides of the third rigid connection block 1618 in the second direction F. The first compliant beams 161321 on both sides of the third rigid connection block 1618 in the second direction are symmetrically disposed relative to the third rigid connection block 1618. Each first compliant beam 161321 is disposed obliquely relative to the second direction F. Each first compliant beam 161321 is connected between the third rigid connection block 1618 and the first rigid block 16121 or the third rigid block 16123. The first compliant beams 161321 located on the same side of the third rigid connection block 1618 in the second direction F are disposed in parallel.

[0295] In other examples, the number of the first compliant beams 161321 on both sides of the third rigid connecting block 1618 in the second direction F may also be one or more.

[0296] Please continue reading Fig.35, the positive stiffness structure 16131 includes a second compliant beam 161311. Two second compliant beams 161311 are respectively arranged on both sides of the third rigid connection block 1618 in the second direction F. And the second compliant beams 161311 on both sides of the third rigid connection block 1618 in the second direction F are symmetrically arranged relative to the third rigid connection block 1618. Each second compliant beam 161311 is parallel to the second direction F. Each second compliant beam 161311 is connected between the third rigid connection block 1618 and the first rigid block 16121 or the third rigid block 16123. The second compliant beams 161311 located on the same side of the third rigid connection block 1618 in the second direction are arranged at intervals.

[0297] In other examples, the number of the second compliant beams 161311 on both sides of the third rigid connecting block 1618 in the second direction F may also be one or more.

[0298] See also Fig.36 , Fig.36 This is a schematic diagram of the fourteenth first damping mechanism 16 provided in an embodiment of the present application. Fig.36 The embodiment shown is Fig.35 The difference between the illustrated embodiments is that the structure of the positive stiffness structure 16131 is different. Specifically, the positive stiffness structure 16131 includes a bending member 161312. The bending member 161312 includes a third compliant beam C1 and a connecting beam C2.

[0299] The third rigid connection block 1618 is provided with bending pieces 161312 on both sides in the second direction F. The bending pieces 161312 on both sides of the third rigid connection block 1618 in the second direction F are symmetrically arranged relative to the third rigid connection block 1618. The third compliant beam C1 is parallel to the second direction F. One end of the third compliant beam C1 is connected to the third rigid connection block 1618. The connecting beam C2 is arc-shaped. One end of the connecting beam C2 is connected to the end of the third compliant beam C1 away from the third rigid connection block 1618, and the other end of the connecting beam C2 is connected to the second rigid block 16122.

[0300] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0301] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, It is characterized in that include: A base, a first swing arm, a first connecting member and a first damping mechanism; The first connecting member and the first swing arm are both hinged to one end of the base, and a hinge axis of the first swing arm relative to the base and a hinge axis of the first connecting member relative to the base both extend in a first direction; The first connecting member rotates relative to the base to drive the first swing arm to rotate relative to the base, so that the rotating shaft mechanism switches between the unfolded state and the folded state; when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm and the first connecting member can slide relative to each other in a second direction, and the second direction is perpendicular to the first direction; The first damping mechanism is fixed to the first connecting member and includes a first flexible mechanism and a second flexible mechanism. The first swing arm includes a first swing arm body. The first flexible mechanism and the second flexible mechanism are located on opposite sides of the first swing arm body in the first direction. The first flexible mechanism includes an elastic member, the elastic member includes a fixed end and an elastic arm, the fixed end and the elastic arm are distributed and connected in the second direction, the fixed end is relatively fixed to the first connecting member, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm body abuts between the second flexible mechanism and the elastic arm; The surface of the elastic arm facing the second flexible mechanism has a matching slope, and the matching slope is inclined relative to the second direction; one end of the first swing arm body adjacent to the elastic arm has a matching portion, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the matching portion abuts against the matching slope; in the second direction and in the direction toward the base, the matching slope is inclined toward the second flexible mechanism; The surface of the elastic arm facing the second flexible mechanism also has a stop plane, and in the folded state, the mating portion abuts against the stop plane; the stop plane is located at one end of the mating slope close to the base and is connected to the mating slope; in the second direction and in the direction toward the base, the stop plane is inclined in a direction away from the second flexible mechanism; or, the stop plane is perpendicular to the first direction.

2. The rotating shaft mechanism according to claim 1, It is characterized in that When the rotating shaft mechanism switches between the unfolded state and the folded state, the damping force applied by the first flexible mechanism to the first swing arm changes.

3. The rotating shaft mechanism according to claim 1, It is characterized in that The surface of the matching portion facing the elastic arm includes a first area and a second area, the first area and the second area are arranged in the second direction and connected, the first area is parallel to the matching inclined surface, and the second area is parallel to the stop plane; In the folded state, the second area abuts against the stop plane; When the hinge mechanism switches between the unfolded state and the folded state, the first area abuts against the matching inclined surface.

4. The rotating shaft mechanism according to claim 1, It is characterized in that The elastic arm has a first stop step on its surface facing the second flexible mechanism, and the first stop step has a stop surface facing the base; the first swing arm body has a second stop step; in the unfolded state, the second stop step stops at the stop surface.

5. A rotating shaft mechanism, It is characterized in that include: A base, a first swing arm, a first connecting member and a first damping mechanism; The first connecting member and the first swing arm are both hinged to one end of the base, and a hinge axis of the first swing arm relative to the base and a hinge axis of the first connecting member relative to the base both extend in a first direction; The first connecting member rotates relative to the base to drive the first swing arm to rotate relative to the base, so that the rotating shaft mechanism switches between the unfolded state and the folded state; when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm and the first connecting member can slide relative to each other in a second direction, and the second direction is perpendicular to the first direction; The first damping mechanism is fixed to the first connecting member and includes a first flexible mechanism and a second flexible mechanism. The first swing arm includes a first swing arm body. The first flexible mechanism and the second flexible mechanism are located on opposite sides of the first swing arm body in the first direction. The first flexible mechanism includes an elastic member, the elastic member includes a fixed end and an elastic arm, the fixed end and the elastic arm are distributed and connected in the second direction, the fixed end is relatively fixed to the first connecting member, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the first swing arm body abuts between the second flexible mechanism and the elastic arm; The surface of the elastic arm facing the second flexible mechanism has a matching slope, and the matching slope is inclined relative to the second direction; one end of the first swing arm body adjacent to the elastic arm has a matching portion, and when the rotating shaft mechanism switches between the unfolded state and the folded state, the matching portion abuts against the matching slope; in the second direction and in the direction away from the base, the matching slope is inclined toward the second flexible mechanism; The surface of the elastic arm facing the second flexible mechanism also has a stop plane, and in the expanded state, the mating portion abuts against the stop plane; the stop plane is located at the end of the mating slope away from the base and is connected to the mating slope; in the second direction and in the direction away from the base, the stop plane is inclined in the direction away from the second flexible mechanism; or, the stop plane is perpendicular to the first direction.

6. The rotating shaft mechanism according to claim 5, It is characterized in that The surface of the matching portion facing the elastic arm includes a first area and a second area, the first area and the second area are arranged in the second direction and connected, the first area is parallel to the matching inclined surface, and the second area is parallel to the stop plane; In the unfolded state, the second area abuts against the stop plane; When the hinge mechanism switches between the unfolded state and the folded state, the first area abuts against the matching inclined surface.

7. The rotating shaft mechanism according to claim 5, It is characterized in that The elastic arm has a first stop step on its surface facing the second flexible mechanism, and the first stop step has a stop surface facing away from the base; the first swing arm body has a second stop step; in the folded state, the second stop step stops at the stop surface.

8. The rotating shaft mechanism according to claim 4 or 7, It is characterized in that The first stopping step is located at an end of the stopping plane away from the matching inclined surface and is connected to the stopping plane.

9. The rotating shaft mechanism according to any one of claims 1 to 7, It is characterized in that The elastic member extends along the second direction, and the fixed end is located at one end of the elastic arm in the second direction.

10. The rotating shaft mechanism according to any one of claims 1 to 7, It is characterized in that The first flexible mechanism further includes a rigid frame, the rigid frame is fixed to the first connecting member, the rigid frame is located on a side of the elastic member away from the second flexible mechanism, and the fixed end is fixed to the rigid frame.

11. The rotating shaft mechanism according to claim 10, It is characterized in that The first flexible mechanism includes a rigidity reinforcing structure connected between the rigid frame and the elastic arm.

12. The rotating shaft mechanism according to claim 11, It is characterized in that When the rotating shaft mechanism switches between the folded state and the unfolded state, the stiffness coefficient of the first flexible mechanism is a constant value.

13. The rotating shaft mechanism according to claim 12, It is characterized in that The rigidity reinforcement structure comprises a flexible beam, the flexible beam extends in a straight line, two ends of the flexible beam along its own extension direction are directly connected to the elastic arm and the rigid frame respectively, and the flexible beam is arranged obliquely relative to the second direction.

14. The rotating shaft mechanism according to claim 12, It is characterized in that The rigidity reinforcement structure comprises a flexible beam unit, and the two ends of the flexible beam unit along its own extension trajectory are respectively connected to the rigid frame and the elastic arm; Each of the flexible beam units includes a plurality of flexible beams. In the extension direction of the flexible beam unit, the plurality of flexible beams are sequentially connected end to end, and the extension directions of two adjacent flexible beams are different.

15. The rotating shaft mechanism according to claim 14, It is characterized in that The multiple flexible beams of the flexible beam unit include a first flexible beam and a second flexible beam, the first flexible beam extends in the first direction, the second flexible beam is adjacent to the first flexible beam in the extension direction of the flexible beam unit itself, and the second flexible beam extends in the second direction.

16. The rotating shaft mechanism according to claim 14, It is characterized in that The plurality of flexible beams of the flexible beam unit include a first flexible beam, a third flexible beam and a fourth flexible beam, the first flexible beam extending in the first direction; In the extension direction of the flexible beam unit itself, the third flexible beam is adjacent to the first flexible beam, the fourth flexible beam is adjacent to the first flexible beam, and the fourth flexible beam is located at an end of the first flexible beam away from the third flexible beam; The third flexible beam is arranged to be inclined relative to the second direction, the fourth flexible beam is arranged to be inclined relative to the second direction, and the inclination direction of the fourth flexible beam is opposite to that of the third flexible beam.

17. The rotating shaft mechanism according to claim 12, It is characterized in that The rigidity reinforcement structure includes a first flexible beam and a third flexible beam, the first flexible beam extends in the first direction and is connected to the elastic arm, the third flexible beam is located on one side of the first flexible beam in the second direction and is connected between the first flexible beam and the rigid frame, and the third flexible beam is inclined relative to the second direction.

18. The rotating shaft mechanism according to any one of claims 1-7 and 11-17, It is characterized in that A side surface of the first connecting member has a recessed groove, the first damping mechanism is fixed in the recessed groove, an end of the recessed groove adjacent to the base has an opening, and the first swing arm body is inserted through the opening.

19. The rotating shaft mechanism according to any one of claims 1-7 and 11-17, It is characterized in that The second flexible mechanism and the first flexible mechanism are symmetrically arranged relative to the first swing arm body, and the second flexible mechanism and the first flexible mechanism have the same structure, the matching relationship between the second flexible mechanism and the first swing arm body is the same as the matching relationship between the first flexible mechanism and the first swing arm body, and the matching relationship between the second flexible mechanism and the first connecting member is the same as the matching relationship between the first flexible mechanism and the first connecting member.

20. The rotating shaft mechanism according to any one of claims 1-7 and 11-17, It is characterized in that The rotating shaft mechanism also includes a second swing arm, a second connecting member and a second damping mechanism; The second connecting member and the second swing arm are both hinged to the other end of the base, and a hinge axis of the second swing arm relative to the base and a hinge axis of the second connecting member relative to the base both extend in the first direction; The second connecting member rotates relative to the base to drive the second swing arm to rotate relative to the base, so that the rotating shaft mechanism switches between the unfolded state and the folded state; when the rotating shaft mechanism switches between the unfolded state and the folded state, the second swing arm and the second connecting member can slide relative to each other in a third direction, and the third direction is perpendicular to the first direction; The second damping mechanism is fixed to the second connecting member, and the second damping mechanism cooperates with the second swing arm to provide a damping force for the rotation of the second swing arm relative to the base.

21. A foldable electronic device, It is characterized in that include: a first shell and a second shell; The rotating shaft mechanism according to any one of claims 1 to 20, wherein the rotating shaft mechanism is connected between the first shell and the second shell, and the first shell and the second shell are configured to be rotatably connected via the rotating shaft mechanism; A folding screen, the folding screen includes a first display part, a second display part and a third display part, the third display part is connected between the first display part and the second display part, the first display part is supported and fixed on the support surface of the first shell, the second display part is supported and fixed on the support surface of the second shell, and the third display part is supported on the support surface of the hinge mechanism.

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