Rotating mechanism and electronic device

Abstract

The application provides a rotating mechanism and an electronic device. The rotating mechanism comprises a base, a first swing arm, a first connecting plate and a first multi-stable flexible mechanism. The first swing arm and the first connecting plate are both hinged to one side of the base. The first multi-stable flexible mechanism is arranged on the first connecting plate. The first multi-stable flexible mechanism cooperates with the first swing arm to switch between a first stable state and a second stable state. In an unfolded state of the rotating mechanism, and the first multi-stable flexible mechanism is in the first stable state, the first swing arm is locked in a first locking position of the first swing arm relative to the first connecting plate. In a folded state of the rotating mechanism, the first multi-stable flexible mechanism is in the second stable state, and the first swing arm is locked in a second locking position of the first swing arm relative to the first connecting plate. According to the rotating mechanism, the structure layout is reasonable.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and more particularly to a rotating mechanism and an electronic device. Background Technology

[0002] With the development of foldable screen technology, foldable electronic devices have become a hot technology. Currently, the rotating mechanisms used to realize the foldable function of electronic devices usually include locking components. These locking components provide damping force to keep the electronic device in its folded or unfolded state. However, the locking components are usually fixed to the base of the rotating mechanism. Due to the limited installation space at the base, the addition of locking components increases the thickness of the base, which is detrimental to the rationalization and thinning of the rotating mechanism's structure, and consequently, to the thinning and lightening of the electronic device. Summary of the Invention

[0003] This application provides an electronic device and a rotating mechanism, which have a simple structure and are conducive to making the electronic device thinner and lighter.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, this application provides an electronic device, including: a rotating mechanism, a first housing, and a folding screen, wherein the rotating mechanism is configured to switch between an unfolded state and a folded state. The folding screen includes a first portion and a third portion connected together.

[0006] The rotating mechanism includes a base, a first swing arm, a first connecting plate, and a first multistable flexible mechanism. The first swing arm is hinged to one side of the base. The first connecting plate is used to fix the rotating mechanism to the first housing. The first connecting plate and the first swing arm are located on the same side of the base, and the first connecting plate is hinged to one side of the base. The hinge axis of the first connecting plate relative to the base and the hinge axis of the first swing arm relative to the base both extend along a first direction. Both the base and the first housing have support surfaces. The support surface of the first housing is used to support and fix the first part, and the support surface of the base is used to support the third part at least in the unfolded state. The first multistable flexible mechanism is disposed on the first connecting plate and is used to lock the rotating mechanism in the folded and unfolded states.

[0007] According to the first aspect of the present application, the electronic device, by providing a first multistable flexible mechanism and placing it on a first connecting plate, can save space at the base corresponding to the rotating mechanism, thereby facilitating the rational optimization of the overall structural layout of the rotating mechanism. This is beneficial for optimizing the structural layout of the rotating mechanism at the base, enabling a thinner design of the rotating mechanism at the base, and ultimately contributing to a thinner design of the electronic device. Simultaneously, it allows for a modular design of the first multistable flexible mechanism and the first connecting plate, facilitating their assembly as a whole with other components of the rotating mechanism. Furthermore, the motion and force transmission of the first multistable flexible mechanism are achieved through the deformation of some or all of its constituent components, eliminating friction and wear, and thus improving its service life.

[0008] In some embodiments of the first aspect of this application, when the rotating mechanism switches between an unfolded state and a folded state, the first swing arm slides relative to the first connecting plate in a first direction perpendicular to the first direction.

[0009] In some embodiments of the first aspect of this application, the first multistable flexible mechanism has a first stable state and a second stable state. The first multistable flexible mechanism cooperates with the first swing arm to switch between the first stable state and the second stable state. In the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the first housing are coplanar and face the same direction, and the first multistable flexible mechanism is in the first stable state to lock the first swing arm in a first locking position relative to the first connecting plate. In the folded state of the rotating mechanism, the support surface of the first housing is perpendicular to the support surface of the base, and the first multistable flexible mechanism is in the second stable state to lock the first swing arm in a second locking position relative to the first connecting plate.

[0010] According to the electronic device of the first aspect of this application, a first multistable flexible mechanism cooperates with a first swing arm to lock the first swing arm in a second locking position relative to the first connecting plate when the rotating mechanism is in a folded state, and to lock the first swing arm in a first locking position relative to the first connecting plate when the rotating mechanism is in an unfolded state. By using the first multistable flexible mechanism to lock the electronic device in both the folded and unfolded states, space can be saved at the base corresponding to the rotating mechanism, facilitating a more rational optimization of the overall structural layout of the rotating mechanism. This is beneficial for optimizing the structural layout of the rotating mechanism at the base, enabling a thinner design at the base, and consequently, a thinner design for the electronic device. Furthermore, it allows for a modular design of the first multistable flexible mechanism and the first connecting plate, facilitating their assembly as a whole with other components of the rotating mechanism. Moreover, the motion and force transmission of the first multistable flexible mechanism are achieved through the deformation of some or all of its constituent components, eliminating friction and wear, thus improving its service life.

[0011] In some embodiments of the first aspect of this application, the first multistable flexible mechanism includes: a first compliant bistable unit, which comprises two first compliant beam units arranged symmetrically in a first direction. The adjacent ends of the two first compliant beam units are respectively fixed relative to a first swing arm, and the other ends of the two first compliant beam units are respectively fixed relative to a first connecting plate. The length of the extension trajectory of the first compliant beam unit is greater than the vertical distance between one end and the other end of the first compliant beam unit in the first direction. This arrangement results in a simple structure.

[0012] In some embodiments of the first aspect of this application, the first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; one end of the first compliant beam is fixed relative to the first swing arm, one end of the first flexible beam is fixed relative to the first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam; wherein the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam. This is beneficial to improving the stiffness of the entire first compliant beam unit, which in turn is beneficial to increasing the force required to bend the first compliant beam unit and improving the reliability of the locking of the first multistable flexible mechanism to the first swing arm.

[0013] In some embodiments of the first aspect of this application, the cross-sectional area of ​​the first rigid member is larger than the cross-sectional area of ​​the first compliant beam, and the cross-sectional area of ​​the first rigid member is larger than the cross-sectional area of ​​the first flexible beam. This results in the stiffness of the first rigid member being greater than the stiffness of both the first compliant beam and the first flexible beam.

[0014] In some embodiments of the first aspect of this application, both the first compliant beam and the first flexible beam are sheet-like. This facilitates the elastic deformation of the first compliant beam and the first flexible beam.

[0015] In some embodiments of the first aspect of this application, the first compliant beam element is a sheet with a uniform cross-sectional area everywhere. This results in a simple structure, and the first compliant beam element is more conducive to elastic deformation.

[0016] In some embodiments of the first aspect of this application, the rotating mechanism has an intermediate hovering state, which is located on the switching path between the rotating mechanism and the unfolded state and the folded state; the first multistable flexible mechanism also has a third stable state, which is located on the switching path between the first multistable flexible mechanism and the second stable state. In the intermediate hovering state of the rotating mechanism, the first multistable flexible mechanism is in the third stable state to lock the first swing arm in a third locking position relative to the first connecting plate. The third locking position is located on the switching path between the first locking position and the second locking position. In this way, the entire multistable flexible mechanism can have at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0017] In some embodiments of the first aspect of this application, the first multistable flexible mechanism further includes a second compliant bistable unit, which is arranged with the first compliant bistable unit in the sliding direction of the first swing arm relative to the first connecting plate. The second compliant bistable unit includes two second compliant beam units, which are arranged and symmetrically disposed in the first direction. The two second compliant beam units are symmetrically disposed with respect to the symmetry line of the two first compliant beam units. One adjacent end of each of the two second compliant beam units is fixed relative to the first swing arm, and the other end of each of the two second compliant beam units is fixed relative to the first connecting plate. The length of the extension trajectory of the second compliant beam unit is greater than the vertical distance between one end of the second compliant beam unit and the other end of the second compliant beam unit in the first direction. At least one of the material, shape, and size of the second compliant beam unit is different from that of the first compliant beam unit. Thus, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the electronic device to be folded, unfolded, and hovered between the folded and unfolded states. Furthermore, the entire first multistable flexible mechanism has the advantages of having fewer parts, simple structure, easy assembly, high reliability, no friction and no wear, which is conducive to realizing the integrated setting of the first multistable flexible mechanism and the first connecting plate, and the overall flattening of the first multistable flexible mechanism and the first connecting plate. This facilitates the overall connection of the first multistable flexible mechanism and the first connecting plate with the first swing arm, simplifies the structure of the rotating mechanism, and is conducive to the thin design of electronic devices.

[0018] In some embodiments of the first aspect of this application, the second compliant beam unit includes: a second compliant beam, a second rigid member, and a second flexible beam; one end of the second compliant beam is fixed relative to the first swing arm, one end of the second flexible beam is fixed relative to the first connecting plate, and the second rigid member is connected between the other end of the second compliant beam and the other end of the second flexible beam; wherein the stiffness of the second rigid member is greater than the stiffness of the second compliant beam, and the stiffness of the second rigid member is greater than the stiffness of the second flexible beam. This is beneficial to improving the stiffness of the entire second compliant beam unit, which in turn is beneficial to increasing the force required to bend the second compliant beam unit and improving the reliability of the locking of the first multistable flexible mechanism to the first swing arm.

[0019] In some embodiments of the first aspect of this application, the cross-sectional area of ​​the second rigid member is larger than the cross-sectional area of ​​the second compliant beam, and the cross-sectional area of ​​the second rigid member is larger than the cross-sectional area of ​​the second flexible beam. This results in the stiffness of the second rigid member being greater than the stiffness of the second compliant beam and the stiffness of the second flexible beam.

[0020] In some embodiments of the first aspect of this application, both the second compliant beam and the second flexible beam are sheet-like. This results in a simple structure.

[0021] In some embodiments of the first aspect of this application, the first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; one end of the first compliant beam is fixed relative to a first swing arm, one end of the first flexible beam is fixed relative to a first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam; the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam; wherein, the dimensions of the first compliant beam and the second compliant beam are different; and / or, the dimensions of the first flexible beam and the second flexible beam are different; and / or, the first compliant beam and the second compliant beam are not parallel; and / or, the first flexible beam and the second flexible beam are not parallel. Thus, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0022] In some embodiments of the first aspect of this application, the length and / or thickness dimensions of the first compliant beam and the second compliant beam are different.

[0023] In some embodiments of the first aspect of this application, the length of the first compliant beam ranges from 5 mm to 30 mm.

[0024] In some embodiments of the first aspect of this application, the length of the second compliant beam ranges from 5 mm to 30 mm.

[0025] In some embodiments of the first aspect of this application, the absolute value of the difference between the length dimension of the first compliant beam and the length dimension of the second compliant beam ranges from 0.5 mm to 10 mm.

[0026] In some embodiments of the first aspect of this application, the thickness of the first compliant beam ranges from 0.1 mm to 2 mm.

[0027] In some embodiments of the first aspect of this application, the thickness of the second compliant beam ranges from 0.1 mm to 2 mm.

[0028] In some embodiments of the first aspect of this application, the absolute value of the difference between the thickness of the first compliant beam and the thickness of the second compliant beam ranges from 0.1 mm to 1 mm.

[0029] In some embodiments of the first aspect of this application, the length and / or thickness of the first flexible beam and the second flexible beam are different.

[0030] In some embodiments of the first aspect of this application, the length of the first flexible beam ranges from 5 mm to 30 mm.

[0031] In some embodiments of the first aspect of this application, the length of the second flexible beam ranges from 5 mm to 30 mm.

[0032] In some embodiments of the first aspect of this application, the absolute value of the difference between the length dimension of the first flexible beam and the length dimension of the second flexible beam ranges from 0.5 mm to 10 mm.

[0033] In some embodiments of the first aspect of this application, the thickness of the first flexible beam ranges from 0.1 mm to 2 mm.

[0034] In some embodiments of the first aspect of this application, the thickness of the second flexible beam ranges from 0.1 mm to 2 mm.

[0035] In some embodiments of the first aspect of this application, the absolute value of the difference between the thickness of the first flexible beam and the thickness of the second flexible beam ranges from 0.1 mm to 1 mm.

[0036] In some embodiments of the first aspect of this application, the thickness of the first flexible beam is the same as the thickness of the second flexible beam.

[0037] In some embodiments of the first aspect of this application, the length dimension of the first flexible beam is the same as the length dimension of the first compliant beam.

[0038] In some embodiments of the first aspect of this application, the length dimension of the second flexible beam is the same as the length dimension of the second compliant beam.

[0039] In some embodiments of the first aspect of this application, the first compliant beam and the second compliant beam are not parallel.

[0040] In some embodiments of the first aspect of this application, the first flexible beam and the second flexible beam are not parallel.

[0041] In some embodiments of the first aspect of this application, the length of the first rigid member is different from the length of the second rigid member.

[0042] In some embodiments of the first aspect of this application, the first rigid member and the second rigid member are not parallel.

[0043] In some embodiments of the first aspect of this application, the second compliant beam element is a sheet with a uniform cross-sectional area everywhere. This facilitates the elastic deformation of the second compliant beam element and simplifies the structure.

[0044] In some embodiments of the first aspect of this application, the first compliant beam unit is a sheet with a uniform cross-sectional area everywhere; wherein the second compliant beam unit has a different length from the first compliant beam unit. This facilitates the elastic deformation of the first compliant beam unit, and the structure is simple. Simultaneously, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0045] In some embodiments of the first aspect of this application, the first multistable flexible mechanism includes: a connecting block fixed to a first swing arm; two first compliant beam units of the first compliant bistable unit are symmetrically arranged relative to the connecting block along their central axes extending in the sliding direction of the first swing arm; and one adjacent end of each of the two first compliant beam units is fixedly connected to the connecting block. This arrangement facilitates the separation of the two first compliant beam units from the first connecting plate, thereby enabling elastic deformation of the two first compliant beam units.

[0046] Specifically, the two second compliant beam units of the second compliant bistable unit are symmetrically arranged along the central axis extending in the sliding direction of the first swing arm relative to the connecting block, and the adjacent ends of the two second compliant beam units are fixedly connected to the connecting block. This arrangement facilitates the separation of the two second compliant beam units from the second connecting plate, allowing for elastic deformation of the two second compliant beam units.

[0047] In some embodiments of the first aspect of this application, the two first compliant beam units of the first compliant bistable unit are respectively located on both sides of the connecting block in the first direction. Therefore, the structure is simple.

[0048] In some embodiments of the first aspect of this application, the two second compliant beam units of the second compliant bistable unit are respectively located on both sides of the connecting block in the first direction. Therefore, the structure is simple.

[0049] In some embodiments of the first aspect of this application, the two first compliant beam units of the first compliant bistable unit are symmetrically arranged relative to the central axis extending in the sliding direction of the first swing arm. This ensures that the first compliant bistable unit is subjected to uniform force.

[0050] In some embodiments of the first aspect of this application, the two second compliant beam units of the second compliant bistable unit are symmetrically arranged relative to the central axis of the first swing arm extending in the sliding direction of the first swing arm. This ensures that the second compliant bistable unit is subjected to uniform force.

[0051] In some embodiments of the first aspect of this application, the first multistable flexible mechanism includes: two fixed portions, which are disposed opposite to each other in a first direction and respectively fixed to a first connecting plate to define a sliding space between themselves and the first connecting plate; a portion of the first swing arm and at least a portion of the first compliant bistable unit are located within the sliding space; two first compliant beam units of the first compliant bistable unit correspond one-to-one with the two fixed portions, and each first compliant beam unit is connected to the first connecting plate through a corresponding fixed portion. This arrangement facilitates the separation of the two first compliant beam units from the first connecting plate, thereby enabling elastic deformation of the two first compliant beam units.

[0052] Specifically, the two second compliant beam units of the second compliant bistable unit correspond one-to-one with the two fixed parts, and each second compliant beam unit is connected to the first connecting plate through the corresponding fixed part. This arrangement facilitates the separation of the two second compliant beam units from the first connecting plate, allowing for elastic deformation of the two second compliant beam units.

[0053] In some embodiments of the first aspect of this application, guide grooves are formed on the opposing surfaces of the two fixed parts, and the two ends of the first swing arm along the first direction are respectively fitted into the guide grooves. This guides the movement of the first swing arm and improves the reliability of the sliding of the first swing arm.

[0054] In some embodiments of the first aspect of this application, the folding screen further includes a second portion connected to the side of the third portion away from the first portion. The electronic device also includes a second housing, and the rotating mechanism further includes: a second swing arm, a second connecting plate, and a second multistable flexible mechanism. The second swing arm is hinged to the other side of the base; the second connecting plate is used to fix the second housing, and the second connecting plate and the second swing arm are located on the same side of the base and hinged to the other side of the base. The hinge axis of the second connecting plate relative to the base and the hinge axis of the second swing arm relative to the base both extend along a first direction. When the rotating mechanism switches between an unfolded state and a folded state, the second swing arm slides perpendicular to the first direction relative to the second connecting plate; the second housing has a support surface for supporting and fixing the second portion; the second multistable flexible mechanism is disposed on the second connecting plate, and the second multistable flexible mechanism... The mechanism has a first stable state and a second stable state; a second multistable flexible mechanism cooperates with a second swing arm to switch between the first stable state and the second stable state; in the folded state of the rotating mechanism, the support surface of the second housing is perpendicular to the support surface of the base, and the second multistable flexible mechanism is in the second stable state to lock the second swing arm in a second locking position relative to the second connecting plate; in the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the first housing are coplanar and face the same direction, and the second multistable flexible mechanism is in the first stable state to lock the second swing arm in a first locking position relative to the second connecting plate.

[0055] In some embodiments of the first aspect of this application, the structure of the second multistable flexible mechanism is the same as that of the first multistable flexible mechanism, the cooperation relationship between the second multistable flexible mechanism and the second swing arm is the same as that between the first multistable flexible mechanism and the first swing arm, and the cooperation relationship between the second multistable flexible mechanism and the second connecting plate is the same as that between the first multistable flexible mechanism and the first connecting plate.

[0056] In one possible implementation of this application, the rotating mechanism further includes: a first connecting member, one end of which is hinged to one side of the base, and a first connecting plate is hinged to the other end of the second connecting member.

[0057] In one possible implementation of this application, the rotating mechanism further includes: a second connecting member, one end of which is hinged to the other side of the base, and a second connecting plate is hinged to the other end of the second connecting member.

[0058] Secondly, this application provides a rotating mechanism, which includes a base, a first swing arm, a first connecting plate, and a first multistable flexible mechanism; the first swing arm is hinged to one side of the base; the first connecting plate and the first swing arm are located on the same side of the base, and the first connecting plate is hinged to one side of the base, and the hinge axis of the first connecting plate relative to the base and the hinge axis of the first swing arm relative to the base both extend along a first direction; the first multistable flexible mechanism is disposed on the first connecting plate and is used to lock the rotating mechanism in a folded state and an unfolded state.

[0059] In some embodiments of the second aspect of this application, when the rotating mechanism switches between an unfolded state and a folded state, the first swing arm slides relative to the first connecting plate in a first direction perpendicular to the first direction.

[0060] In some embodiments of the second aspect of this application, the first multistable flexible mechanism has a first stable state and a second stable state, and the first multistable flexible mechanism cooperates with the first swing arm to switch between the first stable state and the second stable state; in the folded state of the rotating mechanism, the first multistable flexible mechanism is in the second stable state to lock the first swing arm in a second locking position relative to the first connecting plate; in the unfolded state of the rotating mechanism, the first multistable flexible mechanism is in the first stable state to lock the first swing arm in a first locking position relative to the first connecting plate.

[0061] In some embodiments of the second aspect of this application, a first connecting plate is used to fix to a first housing. Both the base and the first housing have support surfaces. The support surface of the first housing is used to support and fix a first part of the folding screen, and the support surface of the base is used to support at least a third part of the folding screen in the unfolded state. In the folded state of the rotating mechanism, the support surface of the first housing is perpendicular to the support surface of the base. In the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the first housing are coplanar and face the same direction.

[0062] In some embodiments of the second aspect of this application, the first multistable flexible mechanism includes: a first compliant bistable unit, which comprises two first compliant beam units arranged symmetrically in a first direction. The adjacent ends of the two first compliant beam units are respectively fixed relative to a first swing arm, and the other ends of the two first compliant beam units are respectively fixed relative to a first connecting plate. The length of the extension trajectory of the first compliant beam unit is greater than the vertical distance between one end and the other end of the first compliant beam unit in the first direction. This arrangement results in a simple structure.

[0063] In some embodiments of the second aspect of this application, the first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; one end of the first compliant beam is fixed relative to the first swing arm, one end of the first flexible beam is fixed relative to the first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam; wherein the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam. This is beneficial to improving the stiffness of the entire first compliant beam unit, which in turn is beneficial to increasing the force required to bend the first compliant beam unit and improving the reliability of the locking of the first multistable flexible mechanism to the first swing arm.

[0064] In some embodiments of the second aspect of this application, the cross-sectional area of ​​the first rigid member is larger than the cross-sectional area of ​​the first compliant beam, and the cross-sectional area of ​​the first rigid member is larger than the cross-sectional area of ​​the first flexible beam. This results in the stiffness of the first rigid member being greater than the stiffness of both the first compliant beam and the first flexible beam.

[0065] In some embodiments of the second aspect of this application, both the first compliant beam and the first flexible beam are sheet-like. This facilitates the elastic deformation of the first compliant beam and the first flexible beam.

[0066] In some embodiments of the second aspect of this application, the first compliant beam element is a sheet with a uniform cross-sectional area everywhere. This results in a simple structure.

[0067] In some embodiments of the second aspect of this application, the rotating mechanism has an intermediate hovering state, which is located on the switching path between the rotating mechanism and the unfolded state; the first multistable flexible mechanism also has a third stable state, which is located on the switching path between the first multistable flexible mechanism and the second stable state. In the intermediate hovering state of the rotating mechanism, the first multistable flexible mechanism is in the third stable state to lock the first swing arm in a third locking position relative to the first connecting plate. The third locking position is located on the switching path between the first locking position and the second locking position. In this way, the entire first multistable flexible mechanism can have at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0068] In some embodiments of the second aspect of this application, the first multistable flexible mechanism further includes a second compliant bistable unit, which is arranged with the first compliant bistable unit in the sliding direction of the first swing arm relative to the first connecting plate. The second compliant bistable unit includes two second compliant beam units, which are arranged in a first direction and symmetrically arranged with respect to the symmetry line of the two first compliant beam units. One adjacent end of each of the two second compliant beam units is fixed relative to the first swing arm, and the other end of each of the two second compliant beam units is fixed relative to the first connecting plate. The length of the extension trajectory of the second compliant beam unit is greater than the vertical distance between one end of the second compliant beam unit and the other end of the second compliant beam unit in the first direction. At least one of the material, shape, and size of the second compliant beam unit differs from that of the first compliant beam unit. Thus, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the electronic device to be folded, unfolded, and hovered between the folded and unfolded states. Furthermore, the entire first multistable flexible mechanism has the advantages of having fewer parts, simple structure, easy assembly, high reliability, no friction and no wear, which is conducive to realizing the integrated setting of the first multistable flexible mechanism and the first connecting plate, and the overall flattening of the first multistable flexible mechanism and the first connecting plate. This facilitates the overall connection of the first multistable flexible mechanism and the first connecting plate with the first swing arm, simplifies the structure of the rotating mechanism, and is conducive to the thin design of electronic devices.

[0069] In some embodiments of the second aspect of this application, the second compliant beam unit includes: a second compliant beam, a second rigid member, and a second flexible beam; one end of the second compliant beam is fixed relative to the first swing arm, one end of the second flexible beam is fixed relative to the first connecting plate, and the second rigid member is connected between the other end of the second compliant beam and the other end of the second flexible beam; wherein the stiffness of the second rigid member is greater than the stiffness of the second compliant beam, and the stiffness of the second rigid member is greater than the stiffness of the second flexible beam. This is beneficial to improving the stiffness of the entire second compliant beam unit, which in turn is beneficial to increasing the force required to bend the second compliant beam unit and improving the reliability of the locking of the first multistable flexible mechanism to the first swing arm.

[0070] In some embodiments of the second aspect of this application, the cross-sectional area of ​​the second rigid member is larger than the cross-sectional area of ​​the second compliant beam, and the cross-sectional area of ​​the second rigid member is larger than the cross-sectional area of ​​the second flexible beam. This results in the stiffness of the second rigid member being greater than the stiffness of the second compliant beam and the stiffness of the second flexible beam.

[0071] In some embodiments of the second aspect of this application, both the second compliant beam and the second flexible beam are sheet-like. This results in a simple structure.

[0072] In some embodiments of the second aspect of this application, the first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; one end of the first compliant beam is fixed relative to a first swing arm, one end of the first flexible beam is fixed relative to a first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam; the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam; wherein, the dimensions of the first compliant beam and the second compliant beam are different; and / or, the dimensions of the first flexible beam and the second flexible beam are different; and / or, the first compliant beam and the second compliant beam are not parallel; and / or, the first flexible beam and the second flexible beam are not parallel. Thus, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0073] In some embodiments of the second aspect of this application, the length and / or thickness dimensions of the first compliant beam and the second compliant beam are different.

[0074] In some embodiments of the second aspect of this application, the length of the first compliant beam ranges from 5 mm to 30 mm.

[0075] In some embodiments of the second aspect of this application, the length of the second compliant beam ranges from 5 mm to 30 mm.

[0076] In some embodiments of the second aspect of this application, the absolute value of the difference between the length dimension of the first compliant beam and the length dimension of the second compliant beam ranges from 0.5 mm to 10 mm.

[0077] In some embodiments of the second aspect of this application, the thickness of the first compliant beam ranges from 0.1 mm to 2 mm.

[0078] In some embodiments of the second aspect of this application, the thickness of the second compliant beam ranges from 0.1 mm to 2 mm.

[0079] In some embodiments of the second aspect of this application, the absolute value of the difference between the thickness dimension of the first compliant beam and the thickness dimension of the second compliant beam ranges from 0.1 mm to 1 mm.

[0080] In some embodiments of the second aspect of this application, the length and / or thickness of the first flexible beam and the second flexible beam are different.

[0081] In some embodiments of the second aspect of this application, the length of the first flexible beam ranges from 5 mm to 30 mm.

[0082] In some embodiments of the second aspect of this application, the length of the second flexible beam ranges from 5 mm to 30 mm.

[0083] In some embodiments of the second aspect of this application, the absolute value of the difference between the length dimension of the first flexible beam and the length dimension of the second flexible beam ranges from 0.5 mm to 10 mm.

[0084] In some embodiments of the second aspect of this application, the thickness of the first flexible beam ranges from 0.1 mm to 2 mm.

[0085] In some embodiments of the second aspect of this application, the thickness of the second flexible beam ranges from 0.1 mm to 2 mm.

[0086] In some embodiments of the second aspect of this application, the absolute value of the difference between the thickness of the first flexible beam and the thickness of the second flexible beam ranges from 0.1 mm to 1 mm.

[0087] In some embodiments of the second aspect of this application, the thickness of the first flexible beam is the same as the thickness of the second flexible beam.

[0088] In some embodiments of the second aspect of this application, the first compliant beam and the second compliant beam are not parallel.

[0089] In some embodiments of the second aspect of this application, the first flexible beam and the second flexible beam are not parallel.

[0090] In some embodiments of the second aspect of this application, the length of the first rigid member is different from the length of the second rigid member.

[0091] In some embodiments of the second aspect of this application, the first rigid member and the second rigid member are not parallel.

[0092] In some embodiments of the second aspect of this application, the second compliant beam element is a sheet with a uniform cross-sectional area everywhere. This facilitates the elastic deformation of the second compliant beam element and simplifies the structure.

[0093] In some embodiments of the second aspect of this application, the first compliant beam unit is a sheet with a uniform cross-sectional area everywhere; wherein the second compliant beam unit has a different length from the first compliant beam unit. This facilitates the elastic deformation of the first compliant beam unit, and the structure is simple. Furthermore, the entire first multistable flexible mechanism has at least three stable states, thereby enabling the folding, unfolding, and intermediate hovering of the electronic device between the folded and unfolded states.

[0094] In some embodiments of the second aspect of this application, the first multistable flexible mechanism includes: a connecting block fixed to a first swing arm; two first compliant beam units of the first compliant bistable unit are symmetrically arranged relative to the connecting block along their central axes extending in the sliding direction of the first swing arm; and one adjacent end of each of the two first compliant beam units is fixedly connected to the connecting block. This arrangement facilitates the separation of the two first compliant beam units from the first connecting plate, allowing for elastic deformation of the two first compliant beam units.

[0095] Specifically, the two second compliant beam units of the second compliant bistable unit are symmetrically arranged along the central axis extending in the sliding direction of the first swing arm relative to the connecting block, and the adjacent ends of the two second compliant beam units are fixedly connected to the connecting block. This arrangement facilitates the separation of the two second compliant beam units from the second connecting plate, allowing for elastic deformation of the two second compliant beam units.

[0096] In some embodiments of the second aspect of this application, the two first compliant beam units of the first compliant bistable unit are respectively located on both sides of the connecting block in the first direction. Thus, the structure is simple.

[0097] In some embodiments of the second aspect of this application, the two second compliant beam units of the second compliant bistable unit are respectively located on both sides of the connecting block in the first direction. Therefore, the structure is simple.

[0098] In some embodiments of the second aspect of this application, the two first compliant beam units of the first compliant bistable unit are symmetrically arranged relative to the central axis extending in the sliding direction of the first swing arm. This ensures that the first compliant bistable unit is subjected to uniform force.

[0099] In some embodiments of the second aspect of this application, the two second compliant beam units of the second compliant bistable unit are symmetrically arranged relative to the central axis extending in the sliding direction of the first swing arm. This ensures that the second compliant bistable unit is subjected to uniform force.

[0100] In some embodiments of the second aspect of this application, the first multistable flexible mechanism includes: two fixed portions, which are arranged opposite to each other in a first direction and respectively fixed to a first connecting plate to define a sliding space between themselves and the first connecting plate; a portion of the first swing arm and at least a portion of the first compliant bistable unit are located within the sliding space; two first compliant beam units of the first compliant bistable unit correspond one-to-one with the two fixed portions, and each first compliant beam unit is connected to the first connecting plate through a corresponding fixed portion. This arrangement facilitates the separation of the two first compliant beam units from the first connecting plate, thereby enabling elastic deformation of the two first compliant beam units.

[0101] Specifically, the two second compliant beam units of the second compliant bistable unit correspond one-to-one with the two fixed parts, and each second compliant beam unit is connected to the first connecting plate through the corresponding fixed part. This arrangement facilitates the separation of the two second compliant beam units from the first connecting plate, allowing for elastic deformation of the two second compliant beam units.

[0102] In some embodiments of the second aspect of this application, guide grooves are formed on the opposing surfaces of the two fixed parts, and the two ends of the first swing arm along the first direction are respectively fitted into the guide grooves. This guides the movement of the first swing arm and improves the reliability of the sliding of the first swing arm.

[0103] In some embodiments of the second aspect of this application, the rotating mechanism further includes: a second swing arm, a second connecting plate, and a second multistable flexible mechanism. The second swing arm is hinged to the other side of the base; the second connecting plate is located on the same side of the base as the second swing arm and is hinged to the other side of the base. The hinge axis of the second connecting plate relative to the base and the hinge axis of the second swing arm relative to the base both extend along a first direction. When the rotating mechanism switches between an unfolded state and a folded state, the second swing arm slides relative to the second connecting plate perpendicular to the first direction. The second multistable flexible mechanism is disposed on the second connecting plate and has a first stable state and a second stable state. The second multistable flexible mechanism cooperates with the second swing arm to switch between the first stable state and the second stable state. In the folded state of the rotating mechanism, the second multistable flexible mechanism is in the second stable state to lock the second swing arm in a second locked position relative to the second connecting plate. In the unfolded state of the rotating mechanism, the second multistable flexible mechanism is in the first stable state to lock the second swing arm in a first locked position relative to the second connecting plate.

[0104] For example, the second connecting plate is used to fix the second housing, the second housing has a support surface, the support surface of the second housing is used to support the second part of the folding screen, in the folded state of the rotating mechanism, the support surface of the second housing is perpendicular to the support surface of the base, in the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the second housing are coplanar and face the same direction.

[0105] In some embodiments of the second aspect of this application, the structure of the second multistable flexible mechanism is the same as that of the first multistable flexible mechanism, the cooperation relationship between the second multistable flexible mechanism and the second swing arm is the same as that between the first multistable flexible mechanism and the first swing arm, and the cooperation relationship between the second multistable flexible mechanism and the second connecting plate is the same as that between the first multistable flexible mechanism and the first connecting plate.

[0106] In one possible implementation of this application, the rotating mechanism further includes: a first connecting member, one end of which is hinged to one side of the base, and a first connecting plate is hinged to the other end of the second connecting member.

[0107] In one possible implementation of this application, the rotating mechanism further includes: a second connecting member, one end of which is hinged to the other side of the base, and a second connecting plate is hinged to the other end of the second connecting member.

[0108] The technical effects of any design method in the second aspect can be found in the technical effects of different design methods in the first aspect, and will not be repeated here. Attached Figure Description

[0109] Figure 1a This is a partial structural schematic diagram of the first type of rotating mechanism provided in the embodiments of this application;

[0110] Figure 1b According to Figure 1a The enlarged view of the rotating mechanism circled at point H;

[0111] Figure 2 A perspective view of a first type of electronic device provided in an embodiment of this application;

[0112] Figure 3 A perspective view of a first type of electronic device in an unfolded state, provided in an embodiment of this application;

[0113] Figure 4 A perspective view of a first type of electronic device in a folded state, provided as an embodiment of this application;

[0114] Figure 5 According to Figures 2-4 A perspective view of the support device in the electronic device shown;

[0115] Figure 6 According to Figure 5 An exploded view of the support device in the shown electronic device;

[0116] Figure 7 According to Figures 5-6 Partial side view of the support device shown;

[0117] Figure 8 According to Figures 5-6 The diagram shows a perspective view of the rotating mechanism, in which the rotating mechanism is in an unfolded state;

[0118] Figure 9 According to Figure 8 The enlarged view of the rotating mechanism shown shows the rotating mechanism in its unfolded state.

[0119] Figure 10 According to Figure 8 The enlarged view of the rotating mechanism shown shows the mechanism in a folded state.

[0120] Figure 11 According to Figure 8 The diagram shows the cooperation between the first connecting plate, the first swing arm, and the first multistable flexible mechanism.

[0121] Figure 12 According to Figure 8 An exploded view of the first connecting plate, the first swing arm, and the first multistable flexible mechanism shown.

[0122] Figure 13 According to Figure 8 A partial schematic diagram of the first multistable flexible mechanism shown;

[0123] Figure 14 According to Figures 8-13 The graph shown shows the relationship between the force on the first multistable flexible mechanism and the displacement of the connecting block.

[0124] Figure 15 According to Figures 8-13 A schematic diagram of the first multistable flexible mechanism in the first stable state shown;

[0125] Figure 16 According to Figures 8-13 A schematic diagram of the first multistable flexible mechanism in the third stable state shown;

[0126] Figure 17 According to Figures 8-13 A schematic diagram of the first multistable flexible mechanism in the second stable state shown;

[0127] Figure 18 According to Figure 8The diagram shows an exploded view of part of the rotating mechanism, in which the rotating mechanism is in the unfolded state.

[0128] Figure 19 According to Figure 8 A partial structural diagram of the first door panel in the rotating mechanism shown;

[0129] Figure 20 According to Figure 9 An enlarged view of the circled portion of the rotating mechanism shown at point F;

[0130] Figure 21 According to Figure 8 A schematic diagram showing the engagement of the first swing arm, the second swing arm, and the two third gears in the rotating mechanism shown.

[0131] Figure 22 A schematic diagram of a second type of first multistable flexible mechanism provided in an embodiment of this application;

[0132] Figure 23 A schematic diagram of the third type of first multistable flexible mechanism provided in the embodiments of this application;

[0133] Figure 24 A schematic diagram of the fourth type of first multistable flexible mechanism provided in the embodiments of this application;

[0134] Figure 25 A schematic diagram of the fifth type of first multistable flexible mechanism provided in the embodiments of this application;

[0135] Figure 26 A schematic diagram of the sixth type of first multistable flexible mechanism provided in the embodiments of this application;

[0136] Figure 27 A schematic diagram showing the seventh type of first multistable flexible mechanism provided in this application, in cooperation with the first connecting plate and the first swing arm;

[0137] Figure 28 According to Figure 27 The graph shown shows the relationship between the force on the first multistable flexible mechanism and the displacement of the connecting block.

[0138] Figure 29 According to Figure 27 A schematic diagram of the first multistable flexible mechanism in the first stable state shown;

[0139] Figure 30 According to Figure 27 The diagram shows a first multistable flexible mechanism in the second stable state. Detailed Implementation

[0140] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0141] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection.

[0142] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0143] This application provides an electronic device, which is a type of foldable electronic device. Foldable electronic devices can include various electronic devices having a foldable screen and capable of changing the unfolded or folded state of the screen and itself. Under different usage requirements, the foldable electronic device can be unfolded to an unfolded state, folded to a folded state, or in an intermediate hovering state between the unfolded and folded states; that is, the intermediate hovering state is on the switching path between the folded and unfolded states. Therefore, the foldable electronic device has at least two states: an unfolded state and a folded state. In some cases, a third state may be further included, namely, an intermediate hovering state between the unfolded and folded states. It is understood that the intermediate hovering state is not a unique state, but can be any one or more states on the switching path between the unfolded and folded states of the electronic device.

[0144] The foldable electronic device includes a foldable screen, a first housing, a second housing, and a rotating mechanism. The first housing, second housing, and rotating mechanism are used to secure the foldable screen. The rotating mechanism is used to allow the first and second housings to unfold and fold relative to each other, thereby enabling the electronic device to fold and unfold. For details, please refer to [link to relevant documentation]. Figure 1a , Figure 1a This is a partial structural schematic diagram of a first type of rotating mechanism 23 provided in an embodiment of this application. In this embodiment, the rotating mechanism 23 may include: a base 24, a first swing arm 251d, a second swing arm 252d, a first connecting plate 251a, a second connecting plate 252a, and a locking member 25a. Specifically, the first connecting plate 251a and the second connecting plate 252a are respectively hinged to opposite sides of the base 24, and the first connecting plate 251a is fixed to the first housing, and the second connecting plate 252a is fixed to the second housing. In this way, the first connecting plate 251a can unfold and fold relative to the base 24 along with the first housing, and the second connecting plate 252a can unfold and fold relative to the base 24 along with the second housing.

[0145] like Figure 1a As shown, the hinge axis of the first connecting plate 251a and the second connecting plate 252a relative to the base 24 extends along the first direction A.

[0146] In the unfolded state, the angle between the first housing and the base is approximately 180°, and the angle between the second housing and the base is approximately 180°. In the folded state, the angle between the first housing and the base is approximately 90°, and the angle between the second housing and the base is approximately 90°, with the first and second housings facing each other.

[0147] In order to maintain the current state of the electronic device 100 when it is currently in the unfolded state and the folded state, the first swing arm 251d is hinged to the base 24, and the first swing arm 251d is slidably engaged with the first connecting plate 251a (e.g., Figure 1a (in the direction indicated by the dashed arrow R in the image), the second swing arm 252d is hinged to the base 24 and the second swing arm 252d is slidably engaged with the second connecting plate 252a (as shown by the dashed arrow R in the image). Figure 1a (The direction indicated by the dashed arrow R in the diagram). Furthermore, the locking member 25a provides damping force to the hinge of the first swing arm 251d relative to the base 24, thus maintaining the current angle between the first housing and the base when the user does not apply any force; in other words, preventing the first housing from rotating relative to the base. Similarly, the locking member 25a provides damping force to the hinge of the second swing arm 252d relative to the base 24, thus maintaining the current angle between the second housing and the base when the user does not apply any force; in other words, preventing the second housing from rotating relative to the base.

[0148] Specifically, the locking member 25a is fixed to the base 24. The locking member 25a may include a spring member 25a1, a first cam 25a2 disposed on the first rocker arm 251d, a second cam 25a3 disposed on the second rocker arm 252d, a concave wheel 25a4, a retaining ring 25a5, and a baffle plate 25a6.

[0149] The retaining ring 25a5 and the baffle 25a6 are mounted on the base 24 and fixed relative to the base 24. The retaining ring 25a5 and the baffle 25a6 are spaced apart in the first direction A.

[0150] The first cam 25a2 corresponds to a concave wheel 25a4 and a spring member 25a1. The second cam 25a3 corresponds to a concave wheel 25a4 and a spring member 25a1. The end of the first rocker arm 251d away from the first cam 25a2 and the end of the second rocker arm 252d away from the second concave wheel 25a2 both abut and limit the movement with the retaining spring 25a6.

[0151] Specifically, in combination Figure 1b , Figure 1b According to Figure 1a The enlarged view of the rotating mechanism 23 circled at H shows the following: the surface of the first cam 25a2 on the first rocker arm 251d facing the corresponding concave wheel 25a4 has a convex surface S1 and a concave surface S2 recessed relative to the convex surface S1. The surface of the second cam 25a3 on the second rocker arm 252d facing the corresponding concave wheel 25a4 also has a convex surface S1 and a concave surface S2 recessed relative to the convex surface S1. The convex surfaces S1 and concave surfaces S2 on each cam are alternately arranged in the circumferential direction of the cam. The surface of the cam facing the corresponding concave wheel 25a4 also has concave surfaces S4 and convex surfaces S3 alternately arranged in the circumferential direction of the concave wheel 25a4. The spring member 25a1 is preloaded between the baffle 25a6 and the corresponding concave wheel 25a4. In the folded and unfolded states, the convex surface S3 on the concave wheel 25a4 is adapted to different concave surfaces S2 on the cam, and similarly, the convex surface S1 on the cam is adapted to different concave surfaces S4 on the concave wheel 25a4.

[0152] When the user drives the first and second housings, causing the first swing arm 251d and the second swing arm 252d to rotate relative to the base 24, the convex surface S3 on the concave wheel 25a4 gradually switches from engaging with one of the concave surfaces S2 on the cam to engaging with the other concave surface S2. During this process, the pressure on the spring 251a1 gradually increases and then gradually decreases, while the concave wheel 25a4 undergoes axial displacement as the pressure on the spring 251a1 changes. This facilitates the switching of the rotating mechanism 23 between the folded and unfolded states. In the absence of external force from the user, the elastic force of the spring 25a1 provides damping force for the rotation of the first swing arm 251d and the second swing arm 252d relative to the base 24, thus allowing the rotating mechanism 23 to maintain its current folded or unfolded state.

[0153] Therefore, the locking component 25a has a large number of parts. This makes the assembly process complex and cumbersome, hindering worker operation and increasing manufacturing costs. Furthermore, during operation, friction occurs between the locking component 25a and the concave cam. After prolonged use, the concave cam wears significantly, causing a decrease in friction, affecting the damping feel, and reducing the lifespan of the locking component 25a. In addition, the locking component 25a is mounted on the base 24. Given the large number of parts and the limited installation space on the base 24, the locking component 25a results in a relatively thick overall thickness of the rotating mechanism 23 corresponding to the base 24. This hinders the overall thinness design of the rotating mechanism 23 at the base 24, and consequently, the thinness of the electronic device 100.

[0154] To solve the aforementioned technical problems, the improvement proposed in this application is to arrange a locking member 25a, which provides damping force for the rotation of the first swing arm 251d relative to the base 24, on the first connecting plate 251a. Furthermore, this locking member 25a is replaced with a first multistable flexible mechanism. That is, in the rotation mechanism of this embodiment, a first multistable flexible mechanism is provided. This first multistable flexible mechanism is located on the first connecting plate 251a, and it cooperates with the first swing arm 251d to lock the first swing arm 251d in a second locking position relative to the first connecting plate 251a when the rotation mechanism 23 is in the folded state. In the unfolded state of the rotation mechanism 23, the first swing arm 251d is locked in a first locking position relative to the first connecting plate 251a. In this way, while using the first multistable flexible mechanism to lock the folded and unfolded states of the electronic device, space can be saved at the base 24 corresponding to the rotating mechanism 23, allowing for a more rational optimization of the overall structural layout of the rotating mechanism 23. Furthermore, compared to the locking member 25a, the first multistable flexible mechanism has a simpler structure, which facilitates optimizing the structural layout of the rotating mechanism 23 at the base 24, enabling a thinner design at the base 24, and consequently, a thinner design for the electronic device. It also allows for a modular design of the first multistable flexible mechanism and the first connecting plate 251a, facilitating their assembly as a whole with other components of the rotating mechanism 23. Moreover, the first multistable flexible mechanism transmits motion and force through the deformation of some or all of its constituent components, eliminating friction and wear, thus improving its service life.

[0155] Based on the above-mentioned improvement ideas, the technical solutions related to the embodiments of this application will be introduced below.

[0156] Before introducing the embodiments of this application, we will first introduce some technical terms that will be mentioned in the embodiments of this application, specifically:

[0157] A flexible mechanism (also known as a compliant mechanism) is a mechanism that uses the flexible deformation of its components to achieve the transfer and conversion of force, motion, or energy. Specifically, it refers to a mechanical structure in which some or all of the components are made of flexible parts. When these flexible parts deform, the mechanical structure will cause displacement of the structures connected to the flexible parts due to the deformation of the flexible parts.

[0158] Multistable flexible mechanisms are a type of mechanism in which the flexible component has two or more stable states with minimum local potential energy during deformation (i.e., at least a first stable state and a second stable state). When switching between two adjacent stable states, this type of mechanism will pass through an unstable state with maximum local potential energy. When a multistable flexible mechanism has two stable states (i.e., a first stable state and a second stable state), it is called a bistable flexible mechanism. A bistable flexible mechanism is a type of mechanism in which the flexible component has two stable states with minimum local potential energy during deformation. The first stable state refers to the initial state of the multistable flexible mechanism, in which the flexible component is not deformed. During the deformation process of the flexible component under the action of external force from the user, deformation energy is continuously stored. After the deformation of the multistable flexible mechanism reaches a certain extent, it will reach an unstable state with maximum local potential energy. When this unstable state is crossed, the flexible component will automatically deform to the next stable state. It is understandable that when no external force from the user acts on the flexible components of the multistable flexible mechanism, in a stable state, the multistable flexible mechanism can maintain its current state by utilizing its own structural construction and the bending deformation of the flexible components.

[0159] Central axis: refers to the center line of an axisymmetric structure. All axisymmetric structures will coincide when folded through this line. The central axis represents the axis of a solid of revolution and the line of symmetry of a non-solid solid.

[0160] The foldable electronic devices provided in this application include, but are not limited to, mobile phones, tablet personal computers, laptop computers, personal digital assistants (PDAs), personal computers, laptops, in-vehicle devices, wearable devices, portable music players, radios, televisions, and speakers. Wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, and smart glasses.

[0161] Please see Figure 2 , Figure 2 This is a perspective view of a first electronic device 100 provided in an embodiment of this application. In this embodiment, the electronic device 100 includes a foldable screen 10 and a supporting device 20. It can be understood that... Figure 2 The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 2 Restrictions.

[0162] The foldable screen 10 can be used to display information and provide an interactive interface for users. In various embodiments of this application, the foldable screen 10 may be, but is not limited to, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MLED) display, or a quantum dot light-emitting diode (QLED) display, etc.

[0163] The foldable screen 10 can switch between an unfolded state and a folded state. In the folded state, the foldable screen 10 can be folded into a first part 11 and a second part 12. The foldable screen 10 also includes a third part 13 located between the first part 11 and the second part 12. At least the third part 13 of the foldable screen 10 is made of a flexible material. The first part 11 and the second part 12 can be made of flexible materials, rigid materials, or a combination of both; no specific limitations are made here.

[0164] Please see Figure 3 , Figure 3 This is a perspective view of a first type of electronic device 100 in an unfolded state, as provided in an embodiment of this application. When the foldable screen 10 is in the unfolded state, the first part 11, the second part 12, and the third part 13 are arranged in a coplanar plane and face the same direction. In this state, a large-screen display can be achieved, providing users with richer information and a better user experience.

[0165] Please see Figure 4 , Figure 4 This is a perspective view of a first type of electronic device 100 in a folded state, provided in an embodiment of this application. When the folding screen 10 is in a folded state, the third part 13 is in a bent state, and the first part 11 ( Figure 4 (not shown in the image) and Part 2, 12 ( Figure 4 (Not shown in the image). In this state, the foldable screen 10 is invisible to the user, and the support device 20 protects the foldable screen 10 from being scratched by hard objects. At the same time, in this state, the size of the foldable electronic device 100 can be reduced, making it easier to store.

[0166] The support device 20 supports the foldable screen 10 and allows the foldable screen 10 to switch between an unfolded state and a folded state. See also... Figure 5 , Figure 5 According to Figures 2-4 The diagram shows a perspective view of the support device 20 in the electronic device 100. In this embodiment, the support device 20 includes a first housing 21, a second housing 22, and a rotating mechanism 23. It is understood that... Figure 5 The support device 20 is shown only schematically, and the actual shape, size, position, and construction of these components are not subject to change. Figure 5 Restrictions.

[0167] The support device 20 has a support surface that can be used to support the folding screen 10. With the support of the support surface, the folding screen 10 can be made into a flat shape when unfolded, and the display surface of the folding screen 10 can be made flat.

[0168] The first housing 21 is used for fixing and supporting. Figure 2 The first part 11 of the foldable screen 10. Specifically, the first housing 21 has a support surface M1, and the first housing 21 is fixed and supported by the support surface M1. Figure 2 The first part 11 of the foldable screen 10. Exemplarily, the connection between the support surface M1 and the first part 11 includes, but is not limited to, adhesive.

[0169] The second housing 22 is used for fixing and supporting. Figure 2 The second part 12 of the folding screen 10. Specifically, the second housing 22 has a support surface M2, and the second housing 22 is fixed and supported by the support surface M2. Figure 2 The second part 12 of the foldable screen 10. Exemplarily, the connection between the support surface M2 and the second part 12 includes, but is not limited to, adhesive.

[0170] The first housing 21 and / or the second housing 22 can each form an installation space for mounting electronic components of the electronic device 100, such as circuit boards, batteries, receivers, speakers, and cameras. The circuit board can integrate electronic components such as the main controller, storage unit, antenna module, and power management module of the electronic device 100, while the battery can power the foldable screen 10, circuit boards, receivers, speakers, and cameras. The first housing 21 and the second housing 22 can be of equal or unequal thickness; this embodiment does not limit this.

[0171] In some embodiments, both the first housing 21 and the second housing 22 may have mounting spaces, distributing the electronic components of the electronic device 100 within the two housings. In other embodiments, mounting spaces may be provided only in the first housing 21, concentrating the electronic components of the electronic device 100 within the first housing 21; alternatively, both the first housing 21 and the second housing 22 may have mounting spaces, but most of the components of the electronic device 100 may be located in the second housing 22, with a smaller portion located in the first housing 21, making the first housing 21 lighter and thus allowing for easier folding and unfolding.

[0172] The first housing 21 can be a single structural unit or assembled from multiple parts. Similarly, the second housing 22 can be a single structural unit or assembled from multiple parts.

[0173] In some embodiments, please refer to Figure 6 , Figure 6 According to Figure 5 The diagram shows an exploded view of the support device 20 in the electronic device 100. The first housing 21 includes a first middle frame 211 and a first back cover 212. A support surface M1 is located on the first middle frame 211. The first back cover 212 is fixed to the side of the first middle frame 211 facing away from the support surface M1, and the surface of the first back cover 212 facing away from the support surface M1 of the first middle frame 211 is the exterior surface. The mounting space on the first housing 21 is defined by the first middle frame 211 and the first back cover 212.

[0174] The second housing 22 includes a second middle frame 221 and a second back cover 222. A support surface M2 is located on the second middle frame 221. The second back cover 222 is fixed to the side of the second middle frame 221 facing away from the support surface M2. The surface of the second back cover 222 facing away from the support surface M2 of the second middle frame 221 is the exterior surface. The mounting space on the second housing 22 is defined by the second middle frame 221 and the second back cover 222.

[0175] The rotating mechanism 23 supports the third part 13 of the folding screen 10. Furthermore, the rotating mechanism 23 connects the first housing 21 and the second housing 22, enabling a rotatable connection between them and allowing relative rotation between them. Specifically, as shown... Figure 6 As shown, the axis of rotation of the first housing 21 relative to the second housing 22 extends along a first direction A. In some embodiments, the rotation mechanism 23 is connected between the first middle frame 211 of the first housing 21 and the second middle frame 221 of the second housing 22. In other embodiments, the rotation mechanism 23 may also be connected between the first back cover 212 of the first housing 21 and the second back cover 222 of the second housing 22.

[0176] The rotating mechanism 23 can switch between an unfolded state and a folded state. By switching between the unfolded and folded states using the rotating mechanism 23, the entire electronic device 100 can be switched between the unfolded and folded states.

[0177] Specifically, please refer to Figure 7 , Figure 7 According to Figures 5-6 A partial side view of the support device 20 shown. During the transition from the unfolded state to the folded state, the rotating mechanism 23 can drive the first housing 21 and the second housing 22 to rotate in opposite directions. During this process, the rotation direction of the first housing 21 (e.g., ...) Figure 7 The direction indicated by arrow P1 in the diagram) and the rotation direction of the second housing 22 (as shown in the diagram) Figure 7 (The direction indicated by arrow P2 in the diagram) is opposite. When the rotating mechanism 23 switches to the folded state, the first housing 21 and the second housing 22 face each other, and the support surface M1 of the first housing 21 and the support surface M2 of the second housing 22 face each other. At this time, there may be a small angle between the support surface M1 of the first housing 21 and the support surface M2 of the second housing 22, or they may be parallel to each other so that the two housings can be completely closed, thereby realizing the folding of the first housing 21 and the second housing 22, so that the first part 11 and the second part 12 of the folding screen 10 can be set relative to each other, and the electronic device 100 is switched to the folded state as a whole.

[0178] Furthermore, during the transition from a folded state to an unfolded state, the rotating mechanism 23 can drive the first housing 21 and the second housing 22 to rotate in opposite directions. During this process, the rotation direction of the first housing 21 (e.g., ...) Figure 7 The direction indicated by arrow Q1 in the diagram) and the rotation direction of the second housing 22 (as shown in the diagram) Figure 7(The direction indicated by arrow Q2 in the diagram) is opposite. When the rotating mechanism 23 switches to the unfolded state, the support surface M1 of the first housing 21 and the support surface M2 of the second housing 22 are coplanar and face the same direction. This enables the unfolding of the first housing 21 and the second housing 22, so that the first part 11 and the second part 12 of the folding screen 10 are coplanar and face the same direction, thus switching the entire electronic device 100 to the unfolded state.

[0179] The fact that the supporting surface M1 of the first housing 21 and the supporting surface M2 of the second housing 22 are coplanar and have the same orientation means that the supporting surface M1 of the first housing 21 and the supporting surface M2 of the second housing 22 can be 180° apart. Of course, a certain angular tolerance is also allowed, for example, a tolerance within ±10°. In other words, the angle between the supporting surface M1 of the first housing 21 and the supporting surface M2 of the second housing 22 is between 170° and 190°.

[0180] Please continue reading. Figure 6 and Figure 7 The rotating mechanism 23 includes: a base 24, a first door panel 26, a second door panel 27, and a rotating assembly 25. Figure 7 The diagram only schematically illustrates some of the components included in the rotating mechanism 23; the actual shape, size, position, and construction of these components are not subject to change. Figure 7 Restrictions. Figure 7 The first direction A shown in the diagram is perpendicular to the plane of the paper.

[0181] The base 24 has a support surface M4. In the unfolded state, the support surface M4 on the base 24 is adapted to support the third part 13 of the foldable screen 10, thereby ensuring the flatness of the foldable screen 10 in the unfolded state. In the folded state, the third part 13 of the foldable screen 10 is bent, and a certain gap can be maintained between the third part 13 and the base 24 to prevent the foldable screen 10 from elastically deforming and being squeezed against the base 24 and damaged when dropped. Of course, it is understandable that in other examples, in the folded state, the support surface M4 of the base 24 can also support the third part 13. For example, the middle area of ​​the support surface M4 of the base 24 is glued to the third part 13 to provide a close fit and support.

[0182] Specifically, in the folded state of the electronic device 100, the support surface M4 of the base 24 is perpendicular to the support surface M1 of the first housing 21 (but in actual scenarios, a certain angular tolerance is allowed, for example, the angle between the support surface M1 of the first housing 21 and the support surface M4 of the base 24 can be between 80° and 100°). The support surface M4 of the base 24 is perpendicular to the support surface M2 of the second housing 22 (but in actual scenarios, a certain angular tolerance is allowed, for example, the angle between the support surface M2 of the second housing 22 and the support surface M4 of the base 24 can be between 80° and 100°).

[0183] The base 24 extends in the first direction A. That is, the length direction of the base 24 is the first direction A. This aligns the length direction of the base 24 with the length direction of the electronic device 100 in its folded state, which helps to increase the length of the support surface M4 on the base 24, thereby increasing the area of ​​the support surface M4. This allows the support surface M4 to reliably support the third part 13 of the foldable screen 10. Of course, it is understood that in other examples, the width direction of the base 24 could also be the first direction A.

[0184] In order to fold the foldable screen 10 into a teardrop shape when the electronic device 100 is in a folded state, the inward folding angle (R angle) of the third part 13 is increased to improve the service life of the foldable screen 10. The first door panel 26 and the second door panel are arranged on both sides of the support surface M4 of the base 24 in the width direction. The first door panel 26 and the second door panel 27 are respectively formed into a flat plate shape.

[0185] Specifically, the first door panel 26 has a supporting surface M5, and the second door panel 27 has a supporting surface M6. Both supporting surfaces M5 and M6 are attached to the third portion 13 of the folding screen 10 to support it. Supporting surface M5 is located between supporting surfaces M4 and M1 (in combination). Figure 5 Support surface M6 is located between support surface M4 and support surface M2 (in combination). Figure 5 Furthermore, the rotating assembly 25 allows the first door panel 26 to rotate relative to the base 24, and the second door panel 27 to rotate relative to the base 24.

[0186] During the process of electronic device 100 switching from an unfolded state to a folded state, such as Figure 7As shown, the first door panel 26 rotates relative to the base 24 in the rotation direction P1, and the second door panel 27 rotates relative to the base 24 in the opposite direction P2. That is, the ends of the first door panel 26 and the second door panel 27 furthest from the base 24 approach each other, while the ends of the first door panel 26 and the second door panel 27 closest to the base 24 move away from each other, causing the folding screen 10 to bend between the first door panel 26 and the second door panel 27. Thus, the first door panel 26, the base 24, and the second door panel 27 form a near-triangular receiving cavity, within which the third part 13 of the folding screen 10 is housed, and can be teardrop-shaped. This increases the inward folding angle (R angle) of the third part 13, improving the lifespan of the folding screen 10.

[0187] Conversely, when the electronic device 100 switches from a folded state to an unfolded state, the first door panel 26 moves relative to the base 24 in a direction opposite to the rotation direction P1 (e.g., ...). Figure 7 The second door panel 27 rotates relative to the base 24 in the direction indicated by Q1 (as shown in the image), and rotates in the opposite direction to the direction of P2 (e.g., ...). Figure 7 The first door panel 26 and the second door panel 27 rotate in the direction indicated by Q2. That is, the first door panel 26 and the second door panel 27 move away from each other until the support surface M5 of the first door panel 26, the support surface M4 of the base 24 and the support surface M6 of the second door panel 27 are coplanar and face the same direction, thereby causing the folding screen 10 to unfold and supporting the folding screen 10.

[0188] It can be understood that the coplanarity of the support surface M5 of the first door panel 26, the support surface M4 of the base 24, and the support surface M6 of the second door panel 27 means that the included angle between any two of the support surfaces M5 of the first door panel 26, M4 of the base 24, and M6 of the second door panel 27 is 180°. Of course, in actual scenarios, a certain degree of error is allowed. For example, the included angle between any two can be between 80° and 100°.

[0189] It is understandable that in other examples, the rotating mechanism 23 may not have a first door plate 26 and a second door plate 27, but instead has a support surface M5 on the first connecting plate 251a and a support surface M6 on the second connecting plate 252a, as described below.

[0190] To enable the folding and unfolding of the electronic device 100, please refer to [link / reference needed]. Figure 8 and Figure 9 , Figure 8 According to Figures 5-6 The figure shows a perspective view of the rotating mechanism 23, wherein the rotating mechanism 23 is in the unfolded state; Figure 9 According to Figure 8The enlarged view of the rotating mechanism 23 shown indicates that the rotating mechanism 23 is in the deployed state. Specifically, the rotating assembly 25 includes a first connecting plate 251a, a first connecting member 251b, a first swing arm 251d, a first hinge member 251c, a first multistable flexible mechanism 251e, a second connecting plate 252a, a second connecting member 252b, a second swing arm 252d, a second hinge member 252c, and a second multistable flexible mechanism 252e. It can be understood that... Figure 8 , Figure 9 The diagram only schematically illustrates some of the components included in the rotating assembly 25; the actual shape, size, position, and construction of these components are not subject to change. Figure 8 , Figure 9 The number of rotating components 25 can be one or more. Figure 8 and Figure 9 In the specific example shown, there are two rotating components 25, but this does not constitute a special limitation on this application.

[0191] The first connecting plate 251a is fixed to the first housing 21. Specifically, the first connecting plate 251a is fixed to the first middle frame 211. For example, the first connecting plate 251a can be fixed to the first middle frame 211 by means of threaded connection, riveting, bonding, etc., or it can be integrally formed with the first middle frame 211.

[0192] The first connecting plate 251a is hinged to one side of the base 24 (e.g., one side in the width direction). Specifically, the first connecting plate 251a is hinged to one side of the base 24 via a first connecting member 251b. That is, one end of the first connecting member 251b is hinged to one side of the base 24. The hinge axis of the first connecting member 251b relative to the base 24 extends along a first direction A. The other end of the first connecting plate 251a is hinged to the first connecting member 251b, and the hinge axis of the first connecting plate 251a relative to the first connecting member 251b extends along the first direction A.

[0193] The first swing arm 251d and the first connecting plate 251a are located on the same side of the base 24. The first swing arm 251d is hinged to one side of the base 24. The hinge axis of the first swing arm 251d relative to the base 24 extends along a first direction A. The first swing arm 251d and the first connecting plate 251a are spaced apart in the first direction A. During the switching process of the rotating mechanism 23 between the unfolded state and the folded state, the first swing arm 251d is positioned relative to the first connecting plate 251a in a direction perpendicular to the first direction A (e.g., ...). Figure 9 The arrow (in the direction indicated by the dashed arrow R) can be slidable.

[0194] Please see Figure 9 and Figure 10 , Figure 10 According to Figure 8The enlarged view of the rotating mechanism 23 shown shows the rotating mechanism 23 in a folded state. When the first swing arm 251d slides relative to the first connecting plate 251a in a direction perpendicular to the first direction A, it can slide to a first locking position of the first swing arm 251d relative to the first connecting plate 251a (e.g., Figure 9 SZ1 indicates the position of the first swing arm 251d) and the second locking position of the first swing arm 251d relative to the first connecting plate 251a (e.g., Figure 10 (SZ2 indicates the position of the first swing arm 251d). When the first swing arm 251d slides relative to the first connecting plate 251a to the first locking position, the rotating mechanism 23 is in the unfolded state; when the first swing arm 251d slides relative to the first connecting plate 251a to the second locking position, the rotating mechanism 23 is in the folded state.

[0195] A first multistable flexible mechanism 251e is disposed on a first connecting plate 251a. The first multistable flexible mechanism 251e has a first stable state and a second stable state. The first multistable flexible mechanism 251e cooperates with a first swing arm 251d. The first multistable flexible mechanism 251e switches between the first stable state and the second stable state as the first swing arm 251d slides relative to the first connecting plate 251a.

[0196] like Figure 9 As shown, in the deployed state of the rotating mechanism 23, the first multistable flexible mechanism 251e is in a first stable state, thereby locking the first swing arm 251d in a first locked position (e.g., Figure 9 (The location indicated by SZ1); or, as Figure 10 As shown, in the folded state of the rotating mechanism 23, the first multistable flexible mechanism 251e is in the second stable state, so as to lock the first swing arm 251d in the second locking position (e.g., Figure 10 (The position indicated by SZ2 in the diagram). That is, in the unfolded state of the rotating mechanism 23, the first multistable flexible mechanism 251e can restrict the sliding of the first swing arm 251d relative to the first connecting plate 251a, thereby locking the first swing arm 251d in the first locked position; in the folded state of the rotating mechanism 23, the first multistable flexible mechanism 251e can also restrict the sliding of the first swing arm 251d relative to the first connecting plate 251a, thereby locking the first swing arm 251d in the second locked position. In the second stable state, the deformation degree of the flexible component in the first multistable flexible mechanism 251e is greater than the deformation degree of the flexible component in the first stable state.

[0197] In this way, when the first multistable flexible mechanism 251e locks the first swing arm 251d in the first locked position, the first swing arm 251d will no longer slide along the first connecting plate 251a when no user-induced external force is applied to the first housing 21, thus allowing the rotation mechanism 23 to remain in its current unfolded state. When the first multistable flexible mechanism 251e locks the first swing arm 251d in the second locked position, the first swing arm 251d will also no longer slide along the first connecting plate 251a when no user-induced external force is applied to the first housing 21, thus allowing the rotation mechanism 23 to remain in its current folded state.

[0198] Specifically, due to the hinged connection between the first connector 251b and the base 24, the hinged connection between the first connecting plate 251a and the first connector 251b, and the hinged connection between the first swing arm 251d and the base 24, while simultaneously slidingly connecting the first connecting plate 251a and the first swing arm 251d, the first connector 251b, the first swing arm 251d, the first connecting plate 251a, and the base 24 can constitute a crank-sliding mechanism. When the user applies a force to the first housing 21, causing the first connecting plate 251a to rotate relative to the base 24, the mechanical linkage of the base 24, the first connecting plate 251a, the first connector 251b, and the first swing arm 251d will synchronously drive the relative sliding between the first swing arm 251d and the first connecting plate 251a, thereby realizing the folding or unfolding of the electronic device 100. When the first multistable flexible mechanism 251e, mounted on the first connecting plate 251a, locks the first swing arm 251d in a first locked position or a second locked position to restrict the sliding of the first swing arm 251d relative to the first connecting plate 251a, the rotation of the first connecting plate 251a relative to the base 24 is also restricted under the mechanical linkage of the base 24, the first connecting plate 251a, the first connecting member 251b, and the first swing arm 251d. Therefore, in the first locked position and the second locked position, the first connecting plate 251a no longer rotates relative to the base 24, thus achieving the purpose of maintaining the electronic device 100 in its current unfolded and folded states.

[0199] In the rotating mechanism 23 of this application embodiment, a first multistable flexible mechanism 251e is provided. The first multistable flexible mechanism 251e is disposed on the first connecting plate 251a, and cooperates with the first swing arm 251d. In the folded state of the rotating mechanism 23, the first swing arm 251d is locked in a second locking position relative to the first connecting plate 251a; in the unfolded state of the rotating mechanism 23, the first swing arm 251d is locked in a first locking position relative to the first connecting plate 251a. Thus, while using the first multistable flexible mechanism 251e to lock the electronic device 100 in both the folded and unfolded states, space corresponding to the rotating mechanism 23 at the base 24 can be saved, facilitating a reasonable optimization of the overall structural layout of the rotating mechanism 23. This is beneficial for optimizing the structural layout of the rotating mechanism 23 at the base 24, and... Figure 1a Compared to the locking member 25a, the first multistable flexible mechanism 251e has a simpler structure, which facilitates a thinner design of the rotating mechanism 23 corresponding to the base 24, and thus benefits the thinner design of the electronic device 100. It also allows for a modular design of the first multistable flexible mechanism 251e and the first connecting plate 251a, making it easy to assemble the first multistable flexible mechanism 251e and the first connecting plate 251a as a whole with other components of the rotating mechanism 23. Furthermore, the first multistable flexible mechanism 251e transmits motion and force by utilizing the deformation of some or all of its constituent components, eliminating friction and wear, and thus improving its service life.

[0200] In some examples, when the first swing arm 251d slides relative to the first connecting plate 251a in a direction perpendicular to the first direction A, it can slide to a third locking position relative to the first connecting plate 251a. The third locking position is between the first locking position and the second locking position, that is, the third locking position is on the switching path when the first swing arm 251d switches between the first and second locking positions. The first multistable flexible mechanism 251e also has a third stable state, which is on the switching path when the first multistable flexible mechanism 251e switches between the first and second stable states. The first multistable flexible mechanism 251e cooperates with the first swing arm 251d, and the first multistable flexible mechanism 251e switches between the first stable state, the second stable state, and the third stable state as the first swing arm 251d slides relative to the first connecting plate 251a. When the rotating mechanism 23 is in the intermediate hovering state, the first multistable flexible mechanism 251e is in the third stable state, locking the first swing arm 251d in the third locked position. In this way, when there is no external force applied by the user, the first swing arm 251d no longer slides along the first connecting plate 251a, thereby allowing the rotating mechanism 23 to maintain the current intermediate hovering state.

[0201] It can be understood that "the third locking position is on the switching path of the first swing arm 251d when switching between the first locking position and the second locking position" refers to the movement trajectory of the first swing arm 251d relative to the first connecting plate 251a when moving between the first locking position and the second locking position. Similar explanations in the following text should be understood in the same way.

[0202] It can be understood that the intermediate hovering state occurs during the switching path of the rotating mechanism 23 between the folded and unfolded states. In other words, the rotating mechanism 23 passes through the intermediate hovering state during the switching process between the folded and unfolded states. In the intermediate hovering state, the angle between the support surface M1 of the first housing 21 and the support surface M4 of the base 24 is greater than 90° and less than 180°. For example, in the intermediate hovering state, the angle between the support surface M1 of the first housing 21 and the support surface M4 of the base 24 can be any value between greater than 125° and less than 165°. This allows for the fulfillment of different user needs.

[0203] Furthermore, the intermediate hovering state can be one or more states. When there are multiple intermediate hovering states, the angle between the support surface M1 of the first housing 21 and the support surface M4 of the base 24 is different in different intermediate hovering states. Of course, it is understandable that in other examples, the electronic device 100 may not have an intermediate hovering state, so there is no need to use the first multistable flexible mechanism 251e to lock the first swing arm 251d in the third locking position.

[0204] The structure of the electronic device 100 is described in detail below with two examples regarding whether the electronic device 100 has an intermediate hovering state.

[0205] Please see Figure 11 and Figure 12 , Figure 11 According to Figure 8 A schematic diagram showing the cooperation between the first connecting plate 251a, the first swing arm 251d, and the first multistable flexible mechanism 251e; Figure 12 According to Figure 8 The diagram shows an exploded view of the first connecting plate 251a, the first swing arm 251d, and the first multistable flexible mechanism 251e. The first multistable flexible mechanism 251e includes: a connecting block 251e3, a fixing part 251e4, a first compliant bistable unit 251e1, and a second compliant bistable unit 251e2.

[0206] The connecting block 251e3 is fixed to the first swing arm 251d. The connection methods between the connecting block 251e3 and the first swing arm 251d include, but are not limited to, snap-fit, welding, adhesive bonding, or screw connection. For an example, please refer to [link to example]. Figure 11 and Figure 12 A positioning hole 251e31 is formed on the connecting block 251e3, and a positioning post 251d3 is formed on the first swing arm 251d, the positioning post 251d3 fitting into the positioning hole 251e31. Alternatively, the positioning hole can be provided on the first swing arm 251d, and the positioning post can be provided on the connecting block 251e3. In other examples, the connecting block 251e3 and the first swing arm 251d can also be integrally formed.

[0207] Specifically, the connecting block 251e3 can be located in the middle region of the first swing arm 251d in the first direction A. This arrangement helps ensure the uniformity of force on the connecting block 251e as it moves with the first swing arm 251d, thus facilitating the balance of forces on the two first compliant beam units connected to the connecting block 251e as described below. For example, the connecting block 251e3 is symmetrically arranged about the central axis of the first swing arm 251d extending in the sliding direction of the first swing arm 251d.

[0208] The material of the connecting block 251e3 includes, but is not limited to, metal or plastic. The connecting block 251e3 can be formed into a cube, cylinder, or triangular prism shape.

[0209] There are two fixing parts 251e4. The two fixing parts 251e4 are arranged opposite to each other in the first direction A and are respectively fixed to the first connecting plate 251a. Furthermore, the two fixing parts 251e4 can define a sliding space 251f between themselves and the first connecting plate 251a. A portion of the first swing arm 251d, the first compliant bistable unit 251e1, and the second compliant bistable unit 251e2 can be accommodated within the sliding space 251f.

[0210] For example, the fixing portion 251e4 may protrude from the surface of the first connecting plate 251a, and the portion of the first connecting plate 251a located between the two fixing portions 251e4 is recessed, so that the first connecting plate 251a and the two fixing portions 251e4 define a sliding space 251f with a large depth dimension, so as to accommodate the first swing arm 251d, the first compliant bistable unit 251e1, and the second compliant bistable unit 251e2. For another example, the surface of the first connecting plate 251a is recessed to form the sliding space 251f, and the two sidewalls of the sliding space 251f along the first direction A respectively constitute two fixing portions 251e4. For yet another example, the fixing portion 251e4 may protrude from the surface of the first connecting plate 251a, so as to define the sliding space 251f with the surface of the first connecting plate 251a.

[0211] The connection methods between the fixing part 251e4 and the first connecting plate 251a include, but are not limited to, adhesive bonding, welding, snap-fitting, or screw connection. In other examples, the fixing part 251e4 and the first connecting plate 251a can also be integrally molded. This helps to improve the connection strength and reliability between the fixing part 251e4 and the first connecting plate 251a.

[0212] Guide grooves 251e41 are formed on the opposing surfaces of the two fixed parts 251e4. The two ends of the first swing arm 251d along the first direction A are respectively fitted into the guide grooves 251e41. By providing the guide grooves 251e41, the sliding of the first swing arm 251d relative to the first connecting plate 251a can be guided, thereby improving the reliability of the first swing arm 251d's operation and also enabling the cooperation between the first swing arm 251d and the first connecting plate 251a.

[0213] Please continue reading. Figure 11 and Figure 12 The first compliant bistable element 251e1 includes two first compliant beam elements 251e11. The two first compliant beam elements 251e11 are arranged in the first direction A.

[0214] Specifically, the two first compliant beam units 251e11 are located on either side of the connecting block 251e3 in the first direction A, and are symmetrically arranged relative to the connecting block 251e3. Since the connecting block 251e3 is symmetrically arranged about the central axis extending in the sliding direction of the first swing arm 251d, the two first compliant beam units 251e11 can also be symmetrically arranged about the central axis extending in the sliding direction of the first swing arm 251d. This allows the two first compliant beam units 251e11 to be subjected to balanced forces and deform synchronously.

[0215] Understandably, in other examples, the two first compliant beam units 251e11 may not be located on either side of the connecting block 251e3 in the first direction A, as long as the two first compliant beam units 251e11 are symmetrical about the central axis of the connecting block 251e3 extending in the sliding direction of the first swing arm 251d.

[0216] The adjacent ends of the two first compliant beam units 251e11 are respectively connected to the connecting block 251e3. Specifically, the connection method between the adjacent ends of each first compliant beam unit 251e11 and the connecting block 251e3 includes, but is not limited to, welding, gluing, and snap-fitting. Alternatively, the two first compliant beam units 251e11 and the connecting block 251e3 can be integrally formed. This arrangement helps to improve the connection strength between the connecting block 251e3 and each first compliant beam unit 251e11, ensuring the reliability of the connection.

[0217] Understandably, in other examples, the first multistable flexible mechanism 251e may also exclude the connecting block 251e3, with the adjacent ends of the two first compliant beam units 251e11 directly connected to the first swing arm 251d. This is only necessary as long as the adjacent ends of the two first compliant beam units 251e11 are relatively fixed to the first swing arm 251d.

[0218] Here, "the adjacent ends of the two first compliant beam elements 251e11 are fixed relative to the first swing arm 251d" means that the adjacent ends of the two first compliant beam elements 251e11 and the first swing arm 251d cannot move relative to each other, and their relative positional relationship remains unchanged. Similar descriptions in the following text should be understood in the same way.

[0219] Two first compliant beam units 251e11 correspond one-to-one with two fixing parts 251e4. Each first compliant beam unit 251e11 is located between the corresponding fixing part 251e4 and the connecting block 251e3. The other end of each first compliant beam unit 251e11 is connected to the surface of the corresponding fixing part 251e4 facing the other fixing part 251e4, thereby connecting to the first connecting plate 251a through the corresponding fixing part 251e4. The connection method between each first compliant beam unit 251e11 and the corresponding fixing part 251e4 includes, but is not limited to, welding, gluing, and snap-fitting. Alternatively, the first compliant beam unit 251e11 and the corresponding fixing part 251e4 can also be integrally molded. This arrangement helps to improve the connection strength between the fixing part 251e4 and the corresponding first compliant beam unit 251e11, ensuring the reliability of the connection.

[0220] In the embodiments of this application, each first compliant beam unit 251e11 is located between the corresponding fixing part 251e4 and the connecting block 251e3, which is beneficial for the first compliant beam unit 251e11 to be spaced apart from the first connecting plate 251a, thereby facilitating the elastic deformation of the first compliant beam unit 251e11.

[0221] Understandably, in other examples, the first multistable flexible mechanism 251e may also exclude the fixing part 251e4, and the other ends of the two first compliant beam units 251e11 that are furthest from each other may be directly connected to the first connecting plate 251a. This is only necessary as long as the other ends of the two first compliant beam units 251e11 that are furthest from each other are relatively fixed to the first connecting plate 251a.

[0222] Specifically, the length of the extension trajectory of the first compliant beam unit 251e11 from one end to the other end is greater than the perpendicular distance between the two ends in the first direction A. This facilitates the deformation of the first compliant beam unit 251e11 when an external force is applied.

[0223] Please continue. Figure 11 and Figure 12 The first compliant beam unit 251e11 includes: a first compliant beam 251e111, a first rigid member 251e112, and a first flexible beam 251e113.

[0224] One end of the first compliant beam 251e111 is connected to the connecting block 251e3. The first compliant beam 251e111 is sheet-shaped, that is, the first compliant beam 251e111 is a sheet-shaped spring-loaded structure. By setting the first compliant beam 251e111 to a sheet shape, the bending elastic deformation of the first compliant beam 251e111 can be facilitated.

[0225] One end of the first flexible beam 251e113 is connected to the corresponding fixing part 251e4. The first flexible beam 251e113 is sheet-like, that is, the first flexible beam 251e113 is a sheet-like spring-loaded structure. By setting the first flexible beam 251e113 to be sheet-like, the bending elastic deformation of the first flexible beam 251e113 can be facilitated.

[0226] The first rigid member 251e112 is connected between the other end of the first compliant beam 251e111 and the other end of the first flexible beam 251e113. The stiffness of the first rigid member 251e112 is greater than that of the first compliant beam 251e111 and the first flexible beam 251e113. By making the stiffness of the first rigid member 251e112 greater than that of the first flexible beam 251e113 and also greater than that of the first compliant beam 251e111, the stiffness of the entire first compliant beam unit 251e11 is improved. This, in turn, increases the force required to bend the first compliant beam unit 251e11, thereby improving the reliability of the locking of the first multistable flexible mechanism 251e to the first swing arm 251d. Of course, this application is not limited to this. In other examples, the stiffness of the first rigid member 251e112 may also be equal to the stiffness of the first compliant beam 251e111 and the first flexible beam 251e113.

[0227] Furthermore, the cross-sectional area of ​​the first rigid member 251e112 is larger than the cross-sectional area of ​​the first compliant beam 251e111 and larger than the cross-sectional area of ​​the first flexible beam 251e113, thereby making the stiffness of the first rigid member 251e112 greater than that of the first compliant beam 251e111 and larger than that of the first flexible beam 251e113. For example, the first rigid member 251e112, the first compliant beam 251e111, and the first flexible beam 251e113 are made of the same material, and the cross-sectional area of ​​the first rigid member 251e112 is larger than that of the first compliant beam 251e111 and larger than that of the first flexible beam 251e113. Of course, this application is not limited to this; in other examples, a material with higher stiffness can be used to manufacture the first rigid member 251e112, and a material with relatively lower stiffness can be used to manufacture the first compliant beam 251e111 and the first flexible beam 251e113. At this point, the cross-sectional area of ​​the first rigid member 251e112 can be greater than, equal to, or less than the cross-sectional areas of the first compliant beam 251e111 and the first flexible beam 251e113. This is as long as the stiffness of the first rigid member 251e112 is greater than the stiffness of the first compliant beam 251e111 and greater than the stiffness of the first flexible beam 251e113.

[0228] For example, the first rigid member 251e112 is cubic, cylindrical, or triangular prism in shape. The material of the first rigid member 251e112 includes, but is not limited to, metal, plastic, or a combination of both.

[0229] The first rigid component 251e112 and the first compliant beam 251e111 can be connected by means of adhesive bonding, snap-fitting, welding, or screw connection. Alternatively, the first rigid component 251e112 and the first compliant beam 251e111 can be integrally molded, which simplifies the processing technology of the first compliant beam unit 251e11 and reduces its production cost.

[0230] The first rigid member 251e112 and the first flexible beam 251e113 can be connected by means of adhesive bonding, snap-fitting, welding, or screw connection. Alternatively, the first rigid member 251e112 and the first flexible beam 251e113 can be integrally molded. This simplifies the manufacturing process of the first compliant beam unit 251e11 and reduces its production cost. Specifically, the first rigid member 251e112, the first compliant beam 251e111, and the first flexible beam 251e113 can be integrally molded. This simplifies the manufacturing process of the first compliant beam unit 251e11 and reduces its production cost.

[0231] Please continue reading. Figure 11 and Figure 12 The second compliant bistable unit 251e2 and the first compliant bistable unit 251e1 are arranged in the sliding direction of the first swing arm 251d relative to the first connecting plate 251a.

[0232] Specifically, the second compliant bistable unit 251e2 includes two second compliant beam units 251e21. The two second compliant beam units 251e21 are arranged in the first direction A, symmetrically positioned about the symmetry line of the two first compliant beam units 251e11, thereby ensuring the reliability of the first multistable flexible mechanism 251e. Specifically, the two second compliant beam units 251e21 are located on opposite sides of the connecting block 251e3 in the first direction A, and are symmetrically positioned relative to the connecting block 251e3. Since the connecting block 251e3 is located in the middle region of the first swing arm 251d in the first direction, the two second compliant beam units 251e21 can be symmetrically positioned about the central axis of the first swing arm 251d extending in the sliding direction of the first swing arm 251d. This allows the two second compliant beam units 251e21 to be subjected to balanced forces and deform synchronously.

[0233] It is understandable that in other examples, the two second compliant beam units 251e21 may not be located on both sides of the connecting block 251e3 in the first direction A, as long as the two second compliant beam units 251e21 are symmetrically arranged with respect to the line of symmetry of the two first compliant beam units 251e11.

[0234] Each of the adjacent ends of the two second compliant beam units 251e21 is connected to a connecting block 251e3. Specifically, the connection method between the adjacent ends of each second compliant beam unit 251e21 and the connecting block 251e3 includes, but is not limited to, welding, gluing, and snap-fitting. Alternatively, the two second compliant beam units 251e21 and the connecting block 251e3 can be integrally formed. This arrangement helps to improve the connection strength between the connecting block 251e3 and each second compliant beam unit 251e21, ensuring the reliability of the connection.

[0235] Understandably, in other examples, when the first multistable flexible mechanism 251e does not include the connecting block 251e3, the adjacent ends of the two second compliant beam units 251e21 are directly connected to the first swing arm 251d. This is only necessary to ensure that the adjacent ends of the two second compliant beam units 251e21 are relatively fixed to the first swing arm 251d.

[0236] Two second compliant beam units 251e21 correspond one-to-one with two fixing parts 251e4. Each second compliant beam unit 251e21 is located between the corresponding fixing part 251e4 and the connecting block 251e3. The other end of each second compliant beam unit 251e21 is connected to the corresponding fixing part 251e4, thereby connecting to the first connecting plate 251a through the corresponding fixing part 251e4. The connection method between each second compliant beam unit 251e21 and the corresponding fixing part 251e4 includes, but is not limited to, welding, gluing, and snap-fitting. Alternatively, the second compliant beam unit 251e21 and the corresponding fixing part 251e4 can also be integrally molded. This arrangement helps to improve the connection strength between the fixing part 251e4 and the corresponding second compliant beam unit 251e21, ensuring the reliability of the connection.

[0237] In the embodiments of this application, each second compliant beam unit 251e21 is located between the corresponding fixing part 251e4 and the connecting block 251e3, which is beneficial for the second compliant beam unit 251e21 to be spaced apart from the first connecting plate 251a, thereby facilitating the elastic deformation of the second compliant beam unit 251e21.

[0238] Understandably, in other examples, when the first multistable flexible mechanism 251e does not include the fixing part 251e4, the opposite ends of the two second compliant beam units 251e21 are directly connected to the first connecting plate 251a. This is only necessary to ensure that the opposite ends of the two second compliant beam units 251e21 are relatively fixed to the first connecting plate 251a.

[0239] Specifically, the length of the extension trajectory of the second compliant beam unit 251e21 from one end to the other end is greater than the vertical distance between the two ends in the first direction A. This facilitates the deformation of the second compliant beam unit 251e21 when an external force is applied.

[0240] Please continue reading. Figure 11 and Figure 12 The second compliant beam unit 251e21 includes: a second compliant beam 251e211, a second rigid member 251e212, and a second flexible beam 251e213.

[0241] One end of the second compliant beam 251e211 is connected to the connecting block 251e3. The second compliant beam 251e211 is sheet-like, that is, the second compliant beam 251e211 is a sheet-like spring-loaded structure. By setting the second compliant beam 251e211 to a sheet shape, it is easier for the second compliant beam 251e211 to be bent and deformed.

[0242] One end of the second flexible beam 251e213 is connected to the corresponding fixing part 251e4. The second flexible beam 251e213 is sheet-like, that is, the second flexible beam 251e213 is a sheet-like spring-loaded structure. By setting the second flexible beam 251e213 to a sheet shape, it is easier for the second flexible beam 251e213 to be bent and deformed.

[0243] The second rigid member 251e212 is connected between the other end of the second compliant beam 251e211 and the other end of the second flexible beam 251e213. The stiffness of the second rigid member 251e212 is greater than that of the second compliant beam 251e211 and the second flexible beam 251e213. By making the stiffness of the second rigid member 251e212 greater than that of the second flexible beam 251e213 and also greater than that of the second compliant beam 251e211, it is beneficial to increase the stiffness of the entire second compliant beam unit 251e21. This, in turn, increases the force required to bend the second compliant beam unit 251e21, thereby improving the reliability of the locking of the first multistable flexible mechanism 251e to the first swing arm 251d. Of course, this application is not limited to this; in other examples, the stiffness of the second rigid member 251e212 may also be equal to that of the second compliant beam 251e211 and the second flexible beam 251e213.

[0244] Furthermore, the cross-sectional area of ​​the second rigid member 251e212 is larger than that of the second compliant beam 251e211 and larger than that of the second flexible beam 251e213, thereby making the stiffness of the second rigid member 251e212 greater than that of the second compliant beam 251e211 and larger than that of the second flexible beam 251e213. For example, the second rigid member 251e212, the second compliant beam 251e211, and the second flexible beam 251e213 are made of the same material, and the cross-sectional area of ​​the second rigid member 251e212 is larger than that of the second compliant beam 251e211 and larger than that of the second flexible beam 251e213. Of course, this application is not limited to this; in other examples, a material with higher stiffness can be used to manufacture the second rigid member 251e212, and a material with relatively lower stiffness can be used to manufacture the second compliant beam 251e211 and the second flexible beam 251e213. At this point, the cross-sectional area of ​​the second rigid member 251e212 can be greater than, equal to, or less than the cross-sectional areas of the second compliant beam 251e211 and the second flexible beam 251e213. This is as long as the stiffness of the second rigid member 251e212 is greater than the stiffness of the second compliant beam 251e211 and greater than the stiffness of the second flexible beam 251e213.

[0245] For example, the second rigid member 251e212 is cubic, cylindrical, or triangular prism in shape. The material of the second rigid member 251e212 includes, but is not limited to, metal, plastic, or a combination of both.

[0246] The second rigid member 251e212 and the second compliant beam 251e211 can be connected by means of adhesive bonding, snap-fitting, welding, or screw connection. Alternatively, the second rigid member 251e212 and the second compliant beam 251e211 can be integrally molded, which simplifies the processing technology of the second compliant beam unit 251e21 and reduces its production cost.

[0247] The second rigid member 251e212 and the second flexible beam 251e213 can be connected by means of adhesive bonding, snap-fitting, welding, or screw connection. Alternatively, the second rigid member 251e212 and the second flexible beam 251e213 can be integrally molded. This simplifies the manufacturing process of the second compliant beam unit 251e21 and reduces its production cost. Specifically, the second rigid member 251e212, the second compliant beam 251e211, and the second flexible beam 251e213 can be integrally molded. This simplifies the manufacturing process of the second compliant beam unit 251e21 and reduces its production cost.

[0248] The second compliant bistable unit 251e2 is different from the first compliant bistable unit 251e1. Specifically, at least one of the material, shape, and size of the second compliant beam unit 251e21 is different from the first compliant beam unit 251e11. That is, the material of the second compliant beam unit 251e21 may be different from the first compliant beam unit 251e11; the shape of the second compliant beam unit 251e21 may be different from the first compliant beam unit 251e11; the size of the second compliant beam unit 251e21 may be different from the first compliant beam unit 251e11; two of the parameters of the material, shape, and size of the second compliant beam unit 251e21 may be different from the first compliant beam unit 251e11; or the material, shape, and size of the second compliant beam unit 251e21 may all be different from the first compliant beam unit 251e11. By making at least one of the material, shape, and size of the second compliant beam unit 251e21 different from that of the first compliant beam unit 251e11, the first multistable flexible mechanism 251e can have at least three stable states, so that the electronic device 100 can switch between an unfolded state, a folded state, and an intermediate hovering state.

[0249] The differences between the first compliant beam unit 251e11 and the second compliant beam unit 251e21 in the first multistable flexible mechanism 251e are described below using different embodiments. The descriptions below regarding the dimensional parameters of the first multistable flexible mechanism 251e and the parallelism or non-parallelism between related components refer to the first multistable flexible mechanism 251e in the first stable state (i.e., the initial state). Here, the first stable state (i.e., the initial state) is the stable state in which the first compliant beam unit 251e11 and the second compliant beam unit 251e21 do not deform among the different stable states of the first multistable flexible mechanism 251e.

[0250] In some embodiments, the first compliant beam 251e111 and the second compliant beam 251e211 have different dimensions. This arrangement not only simplifies the structure and facilitates implementation, but also allows the first compliant beam unit 251e11 and the second compliant beam unit 251e21 to have at least different dimensions, so that the first multistable flexible mechanism 251e has at least three stable states, enabling the electronic device 100 to switch between an unfolded state, a folded state, and an intermediate hovering state.

[0251] In some embodiments where the dimensions of the first compliant beam 251e111 and the second compliant beam 251e211 differ, please refer to Figure 13 , Figure 13 According to Figure 8 A partial schematic diagram of the first multistable flexible mechanism 251e is shown. The length dimension l of the first compliant beam 251e111 is also shown. 11The length dimension l of the second compliant beam 251e211 21 Different. Of course, it is understandable that when there are other differences between the second compliant bistable unit 251e2 and the first compliant bistable unit 251e1, such as differences in shape, size, or material, the length dimension l of the first compliant beam 251e111 will differ. 11 The length dimension l of the second compliant beam 251e211 21 They can also be the same.

[0252] Specifically, the length dimension l of the first compliant beam 251e111 11 The value range is 5mm to 30mm. For example, the length dimension l of the first compliant beam 251e111... 11 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm or 28mm.

[0253] Specifically, the length dimension l of the second compliant beam 251e211 21 The value range is 5mm to 30mm. For example, the length dimension l of the second compliant beam 251e211... 21 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm or 28mm.

[0254] Specifically, when the length dimension l of the first compliant beam 251e111 11 The length dimension l of the second compliant beam 251e211 21 At the same time, the length dimension l of the first compliant beam 251e111 11 The length dimension l of the second compliant beam 251e211 21 The absolute value of the difference ranges from 0.5mm to 10mm. For example, the length dimension l of the first compliant beam 251e111... 11 The length dimension l of the second compliant beam 251e211 21 The absolute value of the difference is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm or 7mm.

[0255] In other embodiments where the dimensions of the first compliant beam 251e111 and the second compliant beam 251e211 differ, the thickness dimension t of the first compliant beam 251e111 is... 11 The thickness dimension t of the second compliant beam 251e211 21 Different. Of course, it is understandable that when there are other differences between the second compliant bistable unit 251e2 and the first compliant bistable unit 251e1, such as differences in shape, size, or material, the thickness t of the first compliant beam 251e111 will differ. 11 The thickness dimension t of the second compliant beam 251e211 21 They can also be the same.

[0256] Specifically, the thickness t of the first compliant beam 251e111 11 The value range is 0.1mm to 2mm. For example, the thickness t of the first compliant beam 251e111... 11 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm or 1.9mm.

[0257] Specifically, the thickness t of the second compliant beam 251e211 21 The value range is 0.1mm to 2mm. For example, the thickness t of the second compliant beam 251e211... 21 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm or 1.9mm.

[0258] Specifically, when the thickness dimension t of the first compliant beam 251e111... 11 The thickness dimension t of the second compliant beam 251e211 21 At the same time, the thickness dimension t of the first compliant beam 251e111 is different. 11 The thickness dimension t of the second compliant beam 251e211 21 The absolute value of the difference ranges from 0.1 mm to 1 mm. For example, the thickness t of the first compliant beam 251e111... 11 The thickness dimension t of the second compliant beam 251e211 21 The absolute value of the difference is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm.

[0259] In some embodiments where the dimensions of the first compliant beam 251e111 and the second compliant beam 251e211 differ, the width of the first compliant beam 251e111 and the width of the second compliant beam 251e211 may also differ. Of course, it is understood that when there are other differences between the second compliant bistable unit 251e2 and the first compliant bistable unit 251e1, such as differences in shape, size, or material, the width of the first compliant beam 251e111 and the width of the second compliant beam 251e211 may also be the same.

[0260] In other embodiments, the first flexible beam 251e113 and the second flexible beam 251e213 have different dimensions. This arrangement not only simplifies the structure and facilitates implementation, but also allows the first compliant beam unit 251e11 and the second compliant beam unit 251e21 to have at least different dimensions, so that the first multistable flexible mechanism 251e has at least three stable states, enabling the electronic device 100 to switch between an unfolded state, a folded state, and an intermediate hovering state.

[0261] In some embodiments where the dimensions of the first flexible beam 251e113 and the second flexible beam 251e213 are different, the length dimension l of the first flexible beam 251e113 is... 13 The length dimension l of the second flexible beam 251e213 23 Different. Of course, it is understandable that when there are other differences between the second compliant bistable unit 251e2 and the first compliant bistable unit 251e1, such as differences in shape, size, or material, the length dimension l of the first flexible beam 251e113 will differ. 13 The length dimension l of the second flexible beam 251e213 23 They can also be the same.

[0262] Specifically, the length dimension l of the first flexible beam 251e113 13 The value range is 5mm to 30mm. For example, the length dimension l of the first flexible beam 251e113... 13 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm or 28mm.

[0263] To avoid the first flexible beam 251e113 and the first compliant beam 251e111 not being able to deform simultaneously and achieve multiple stable states due to a large difference in length between them, which would prevent the connecting block 251e3 from sliding with the first swing arm 251d, the length of the first flexible beam 251e113 is l. 13 The length dimension l of the first compliant beam 251e111 11 Same. Of course, the length dimension l of the first flexible beam 251e113 is... 13 The length dimension l of the first compliant beam 251e111 11 Certain differences are also allowed. For example, the absolute value of the difference between the two length dimensions can range from 0 to 5 mm. For example, the absolute value of the difference between the two length dimensions can be 0.5 mm, 1 mm, 1.5 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or 4.5 mm.

[0264] Specifically, the length dimension l of the second flexible beam 251e213 23 The value range is 5mm to 30mm. For example, the length dimension l of the second flexible beam 251e213... 23 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm or 28mm.

[0265] To avoid the second flexible beam 251e213 and the second compliant beam 251e211 not being able to deform simultaneously and achieve multiple stable states due to a large difference in length between the second flexible beam 251e213 and the second compliant beam 251e211, during the sliding of the connecting block 251e3 with the first swing arm 251d, the length of the second flexible beam 251e213 is l 23 The length dimension l of the second compliant beam 251e211 21 Same. Of course, the length dimension l of the second flexible beam 251e213 is also the same. 23 The length dimension l of the second compliant beam 251e211 21 Certain differences are also allowed. For example, the absolute value of the difference between the two length dimensions can range from 0 to 5 mm. For example, the absolute value of the difference between the two length dimensions can be 0.5 mm, 1 mm, 1.5 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or 4.5 mm.

[0266] Specifically, when the length dimension l of the first flexible beam 251e113 13The length dimension l of the second flexible beam 251e213 23 At the same time, the length dimension l of the first flexible beam 251e113 is different. 13 The length dimension l of the second flexible beam 251e213 23 The absolute value of the difference ranges from 0.5mm to 10mm. For example, the length dimension l of the first flexible beam 251e113... 13 The length dimension l of the second flexible beam 251e213 23 The absolute value of the difference is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm or 7mm.

[0267] In other embodiments where the dimensions of the first flexible beam 251e113 and the second flexible beam 251e213 differ, the thickness dimension t of the first flexible beam 251e113 is... 13 The thickness dimension t of the second flexible beam 251e213 23 Different. Of course, it is understandable that when there are other differences between the second compliant bistable unit 251e2 and the first compliant bistable unit 251e1, such as differences in shape, size, or material, the thickness t of the first flexible beam 251e113 will also differ. 13 The thickness dimension t of the second flexible beam 251e213 23 They can also be the same.

[0268] Specifically, the thickness t of the first flexible beam 251e113 13 The value range is 0.1mm to 2mm. For example, the thickness t of the first flexible beam 251e113... 13 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm or 1.9mm.

[0269] Specifically, the thickness t of the first flexible beam 251e113 13 The thickness dimension t of the first compliant beam 251e111 11 They can be the same. This simplifies the structure. Of course, the thickness t of the first flexible beam 251e113... 13 The thickness dimension t of the first compliant beam 251e111 11 They can be different; in this case, the absolute value of the difference between the two thickness dimensions ranges from 0.1 mm to 1 mm. For example, the thickness dimension t of the first compliant beam 251e111... 11The thickness dimension t of the first flexible beam 251e113 13 The absolute value of the difference is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm.

[0270] Specifically, the thickness t of the second flexible beam 251e213 23 The value ranges from 0.1mm to 2mm. For example, the thickness t of the second flexible beam 251e213... 23 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm or 1.9mm.

[0271] Specifically, the thickness t of the second flexible beam 251e213 23 The thickness dimension t of the second compliant beam 251e211 21 They can be the same. This simplifies the structure. Of course, the thickness t of the second flexible beam 251e213... 23 The thickness dimension t of the second compliant beam 251e211 21 They can be different; in this case, the absolute value of the difference between the two thickness dimensions ranges from 0.1 mm to 1 mm. For example, the thickness dimension t of the second flexible beam 251e213... 23 The thickness dimension t of the second compliant beam 251e211 21 The absolute value of the difference is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm.

[0272] Specifically, when the thickness dimension t of the first flexible beam 251e113... 13 The thickness dimension t of the second flexible beam 251e213 23 At the same time, the thickness dimension t of the first flexible beam 251e113 is different. 13 The thickness dimension t of the second flexible beam 251e213 23 The absolute value of the difference ranges from 0.1 mm to 1 mm. For example, the thickness t of the first flexible beam 251e113... 13 The thickness dimension t of the second flexible beam 251e213 23 The absolute value of the difference is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm.

[0273] In some other embodiments, the first compliant beam 251e111 and the second compliant beam 251e211 are not parallel. That is, the angle θ between the first compliant beam 251e111 and the first direction A is... 11 Unlike the angle θ between the second compliant beam 251e211 and the first direction A. 21 This configuration allows the second compliant beam unit 251e21 and the first compliant beam unit 251e11 to have different shapes, which not only simplifies the structure and makes it easy to implement, but also allows the first multi-stable flexible mechanism 251e to have at least three stable states, so that the electronic device 100 can switch between the unfolded state, the folded state, and the intermediate hovering state.

[0274] Of course, it is understandable that in other examples, the first compliant beam 251e111 and the second compliant beam 251e211 may also be parallel.

[0275] Specifically, the angle θ between the first compliant beam 251e111 and the first direction A 11 The value range is 0 to 45°. For example, the angle θ between the first compliant beam 251e111 and the first direction A is... 11 The angles are 2°, 5°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0276] Specifically, the angle θ between the second compliant beam 251e211 and the first direction A 21 The value range is 0 to 45°. For example, the angle θ between the first compliant beam 251e111 and the first direction A is... 21 The angles are 2°, 5°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0277] Specifically, the angle between the first compliant beam 251e111 and the second compliant beam 251e211 (i.e., |θ) 21 -θ 11 The value of |θ ranges from 0 to 35°. For example, the angle between the first compliant beam 251e111 and the second compliant beam 251e211 (i.e., |θ) 21 -θ 11 |) can be 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 14°, 15°, 18° or 20°.

[0278] In some other embodiments, the first flexible beam 251e113 and the second flexible beam 251e213 are not parallel. That is, the angle θ between the first flexible beam 251e113 and the first direction A is... 13Unlike the angle θ between the second flexible beam 251e213 and the first direction A. 23 This configuration allows the second compliant beam unit 251e21 and the first compliant beam unit 251e11 to have different shapes, resulting in a simple structure that is easy to implement. It also allows the first multistable flexible mechanism 251e to have at least three stable states, enabling the electronic device 100 to switch between an unfolded state, a folded state, and an intermediate hovering state. Of course, it is understood that in other examples, the first flexible beam 251e113 and the second flexible beam 251e213 could also be parallel.

[0279] Specifically, the angle θ between the first flexible beam 251e113 and the first direction A 13 The value range is 0 to 45°. For example, the angle θ between the first flexible beam 251e113 and the first direction A is... 13 The angles are 2°, 5°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0280] Specifically, the angle θ between the second flexible beam 251e213 and the first direction A 23 The value range is 0 to 45°. For example, the angle θ between the first flexible beam 251e113 and the first direction A is... 23 The angles are 2°, 3°, 4°, 5°, 6°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0281] Specifically, the angle between the first flexible beam 251e113 and the second flexible beam 251e213 (i.e., |θ) 23 -θ 13 The value of |θ ranges from 0 to 35°. For example, the angle between the first flexible beam 251e113 and the second flexible beam 251e213 (i.e., |θ) 23 -θ 13 |) can be 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 14°, 15°, 18° or 20°.

[0282] In some other embodiments, the length l of the first rigid member 251e112 is... 12 With the second rigid member 251e212l 22The lengths are different. This arrangement not only simplifies the structure and makes it easy to implement, but also allows the first compliant beam unit 251e11 and the second compliant beam unit 251e21 to have at least different dimensions, so that the first multistable flexible mechanism 251e has at least three stable states, enabling the electronic device 100 to switch between an unfolded state, a folded state, and an intermediate hovering state.

[0283] Of course, it is understandable that the length dimension l of the first rigid member 251e112 12 The length dimension l of the second rigid member 251e212 22 They can also be the same.

[0284] Specifically, the length dimension l of the first rigid member 251e112 12 The value range is 5mm to 30mm. For example, the length dimension l of the first rigid member 251e112... 12 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, mm or 28mm.

[0285] Specifically, the length dimension l of the second rigid member 251e212 22 The value range is 5mm to 30mm. For example, the length dimension l of the second rigid member 251e212... 22 Available in 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, mm or 28mm.

[0286] Specifically, when the length dimension l of the first rigid member 251e112 12 The length dimension l of the second rigid member 251e212 22 At the same time, the length dimension l of the first rigid member 251e112 12 The length dimension l of the second rigid member 251e212 22 The absolute value of the difference ranges from 0.5mm to 10mm. For example, the length dimension l of the first rigid member 251e112... 12 The length dimension l of the second rigid member 251e212 22 The absolute value of the difference is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm or 7mm.

[0287] In some other embodiments, the first rigid member 251e112 and the second rigid member 251e212 are not parallel. That is, the angle θ between the first rigid member 251e112 and the first direction A is... 12 Unlike the angle θ between the second rigid member 251e212 and the first direction A. 22 This configuration allows the second compliant beam unit 251e21 and the first compliant beam unit 251e11 to have different shapes, resulting in a simple structure that is easy to implement. It also allows the first multistable flexible mechanism 251e to have at least three stable states, enabling the electronic device 100 to switch between an unfolded state, a folded state, and an intermediate hovering state. Of course, it is understood that in other examples, the first rigid member 251e112 and the second rigid member 251e212 could also be parallel.

[0288] Specifically, the angle θ between the first rigid member 251e112 and the first direction A 12 The value range is 0 to 45°. For example, the angle θ between the first rigid member 251e112 and the first direction A is... 12 The angles are 2°, 5°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0289] Specifically, the angle θ between the second rigid member 251e212 and the first direction A 22 The value range is 0 to 45°. For example, the angle θ between the first rigid member 251e112 and the first direction A is... 22 The angles are 2°, 5°, 7°, 8°, 10°, 14°, 15°, 18°, 20°, 25°, 28°, 30°, 32°, or 35°.

[0290] Specifically, the angle between the first rigid member 251e112 and the second rigid member 251e212 (i.e., |θ) 22 -θ 12 The value of |θ ranges from 0 to 35°. For example, the angle between the first rigid member 251e112 and the second rigid member 251e212 (i.e., |θ) 23 -θ 13 |) can be 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 14°, 15°, 18° or 20°.

[0291] In some other embodiments, the first compliant beam 251e111 and the second compliant beam 251e211 are made of materials with different stiffnesses, thereby resulting in different stiffnesses between the first compliant beam 251e111 and the second compliant beam 251e211. Similarly, the first flexible beam 251e113 and the second flexible beam 251e213 are made of materials with different stiffnesses, thereby resulting in different stiffnesses between the first flexible beam 251e113 and the second flexible beam 251e213.

[0292] The working principle of the first multistable flexible mechanism 251e will be explained below based on its structure.

[0293] Specifically, please refer to Figure 14 , Figure 14 According to Figures 8-13 The figure shows the curves of the force on the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 as a whole and the displacement of the connecting block 251e3 in the first multistable flexible mechanism 251e shown. The figure also shows the curves of the force on the individual first compliant bistable unit 251e1 and the displacement of the connecting block 251e3, as well as the curves of the force on the individual second compliant bistable unit 251e2 and the displacement of the connecting block 251e3.

[0294] like Figure 14 As shown, for the first compliant bistable unit 251e1 alone (i.e., the first multistable flexible mechanism 251e does not have the second compliant bistable unit 251e2), the first compliant bistable unit 251e1 has two stable states, namely R1 (i.e., the first stable state) and R2 (i.e., the second stable state), and one unstable state, X1. In this case, the first multistable flexible mechanism 251e is a bistable flexible mechanism.

[0295] For the second compliant bistable unit 251e2 alone (i.e., the case where the first multistable flexible mechanism 251e does not have the first compliant bistable unit 251e1), the second compliant bistable unit 251e2 also has two stable states, namely R1'' (i.e., the first stable state) and R2'' (i.e., the second stable state), and one unstable state, X1''. In this case, the first multistable flexible mechanism 251e is a bistable flexible mechanism.

[0296] Because at least one of the dimensions, shape, and material of the first compliant beam element 251e11 and the second compliant beam element 251e21 differs. Therefore, as Figure 14As shown, the curves showing the relationship between the force on the individual first compliant bistable unit 251e1 and the displacement of the connecting block 251e3, and the curves showing the relationship between the force on the individual second compliant bistable unit 251e2 and the displacement of the connecting block 251e3, differ. When the first multistable flexible mechanism 251e simultaneously has the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2, the difference between the curves showing the force on the individual first compliant bistable unit 251e1 and the displacement of the connecting block 251e3, and the curves showing the force on the individual second compliant bistable unit 251e2 and the displacement of the connecting block 251e3, results in the curves showing the relationship between the force on the first multistable flexible mechanism 251e and the displacement of the connecting block 251e3 being obtained by superimposing the mechanical properties of the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2. Figure 14 As shown, due to the superposition of the mechanical properties of the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2, the first multistable flexible mechanism 251e has three stable states: R1' (i.e., the first stable state), R2' (i.e., the second stable state), and R3' (i.e., the third stable state), as well as two unstable states: X1' and X2'.

[0297] Specifically, please refer to Figures 15-17 , Figure 15 According to Figures 8-13 A schematic diagram of the first multistable flexible mechanism 251e in the first stable state shown; Figure 17 According to Figures 8-13 A schematic diagram of the first multistable flexible mechanism 251e in the second stable state is shown. Figure 15 As shown, the first multistable flexible mechanism 251e is in a first stable state. At this time, the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 are generally convex upwards, and neither of them deforms. When the user applies a force to the first housing 21, causing the first connecting plate 251a to rotate relative to the base 24, moving from the unfolded state to the folded state, as... Figure 16As shown, the connecting block 251e3 moves in the direction of arrow F, causing deformation of the first compliant beam 251e111, the first flexible beam 251e113, the second compliant beam 251e211, and the second flexible beam 251e213, and also causing the first rigid member 251e112 and the second rigid member 251e212 to rotate, thereby deforming the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2. Before the connecting block 251e3 moves from the first stable state R1' to the highest energy unstable state X1', the entire first multistable flexible mechanism 251e continuously stores deformation energy; when the connecting block 251e3 moves past the highest energy unstable state X1' towards the third stable state R3', the first multistable flexible mechanism 251e will automatically release the stored deformation energy and output a force to push the connecting block 251e3 to continue moving until the third stable state R3' is reached (e.g., ...). Figure 16 (as shown in the diagram), thus placing the electronic device 100 in a hovering state in the middle.

[0298] As the force applied by the user to the first housing 21 continues to cause the first connecting plate 251a to rotate relative to the base 24, moving from the suspended state to the unfolded state, as... Figure 17 As shown, the connecting block 251e3 continues to move in the direction of arrow F, which will cause further deformation of the first compliant beam 251e111, the first flexible beam 251e113, the second compliant beam 251e211 and the second flexible beam 251e213, as well as cause further rotation of the first rigid member 251e112 and the second rigid member 251e212, so that the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 continue to deform. Before the connecting block 251e3 moves from the third stable state R3' to the highest energy unstable state X2', the entire first multistable flexible mechanism 251e continuously stores deformation energy again; when the connecting block 251e3 moves past the highest energy unstable state X2' towards the second stable state R2', the first multistable flexible mechanism 251e will automatically release the stored deformation energy and output force to push the connecting block 251e3 to continue moving (during this process, even if the user does not apply force to the first housing 21, the first multistable flexible mechanism 251e will spontaneously push the connecting block 251e3 to continue moving under the action of its own stored deformation energy), until the second stable state R2' is reached (e.g., Figure 17 (as shown in the diagram), thus placing the electronic device 100 in a folded state. It is understood that the movement from the folded state to the unfolded state is the reverse of the movement described above, and will not be repeated here.

[0299] In summary, in the embodiments of this application, by designing at least one of the materials, sizes, and shapes of the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 to be different, the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 can correspond to different force-displacement curves, thereby enabling the first multistable flexible mechanism 251e to have at least three stable states, so that the electronic device 100 can switch between an unfolded state, a folded state, and an intermediate hovering state.

[0300] In the rotating mechanism 23 of this application embodiment, by setting a first multistable flexible mechanism 251e including a first compliant bistable unit 251e1 and a second compliant bistable unit 251e2, and designing at least one of the materials, sizes and shapes of the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 to be different, the entire first multistable flexible mechanism 251e can have at least three stable states, thereby enabling the electronic device 100 to be folded, unfolded, and in an intermediate hovering state between the folded state and the unfolded state. Furthermore, the entire first multistable flexible mechanism 251e has the advantages of having fewer parts, simple structure, easy assembly, high reliability, no friction and no wear, which is conducive to realizing the integrated setting of the first multistable flexible mechanism 251e and the first connecting plate 251a, and the overall flattening of the first multistable flexible mechanism 251e and the first connecting plate 251a. This facilitates the overall connection of the first multistable flexible mechanism 251e and the first connecting plate 251a with the first swing arm 251d, simplifies the structure of the rotating mechanism 23, and is conducive to the thin design of the electronic device 100.

[0301] It is understandable that when there are multiple intermediate hovering states, it can be achieved by superimposing various compliant bistable units between the fixed part 251e4 and the connecting block 251e3z, or by using multiple compliant bistable units to form different structural layouts. As long as the folding, unfolding and intermediate hovering of the rotating mechanism 23 are achieved by using a multistable flexible mechanism, they are all within the protection scope of this application.

[0302] Based on the above embodiments, please refer to Figure 18 , Figure 18 According to Figure 8The diagram shows an exploded view of a portion of the rotating mechanism 23, with the rotating mechanism 23 in its unfolded state. A first hinge hole 241, penetrating the base 24 in its thickness direction, is provided on the base 24. A first rib 2411 is provided on the inner wall of the first hinge hole 241. One side surface of the first rib 2411 forms a part of the aforementioned support surface M4. The side surface of the first rib 2411 facing away from the support surface M4 forms a first arc surface 24111. The extension path of the first arc surface 24111 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 semi-circular arc (i.e., an arc with a central angle equal to 180°), and is not specifically limited here. Figure 18 In the embodiment shown, the extension path of the first arc surface 24111 is a minor arc.

[0303] The first connector 251b is provided with a first arc-shaped rib 251b1. The extension path of the first arc-shaped rib 251b1 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 semi-circular arc (i.e., an arc with a central angle equal to 180°), and is not specifically limited here. Figure 18 In the illustrated embodiment, the extension path of the first arc-shaped rib 251b1 is a minor arc. The first arc-shaped rib 251b1 can be accommodated within the first hinge hole 241 and mates with the first arc surface 24111, and can rotate within the first hinge hole 241 around the center line of the first arc surface 24111. This achieves the hinge connection between the first connector 251b and the base 24. This structure is simple and easy to implement.

[0304] Please continue reading. Figure 18 The first connecting member 251b is also provided with a first shaft hole 251b2. The first connecting plate 251a is provided with a second shaft hole 251a1. The rotating assembly 25 also includes a first rotating shaft 255. The first rotating shaft 255 passes through the second shaft hole 251a1 and the first shaft hole 251b2. This realizes the rotational connection between the first connecting plate 251a and the first connecting member 251b.

[0305] Please continue reading. Figure 18 The base 24 is provided with a positioning block 242. The positioning block 242 is provided with a first pivot hole 2421, and the first swing arm 251d is provided with a second pivot hole 251d5. The rotating assembly 25 also includes a first pivot shaft 256. The first pivot shaft 256 passes through the first pivot hole 2421 and the second pivot hole 251d5, thereby realizing the rotatable connection between the first swing arm 251d and the base 24.

[0306] Based on the above embodiments, please refer back to the previous section. Figure 8 and Figure 9The first door panel 26 is hinged to the first connecting plate 251a. The first connecting plate 251a is located on the side of the first door panel 26 facing away from the support surface M5. The first hinge member 251c and the first connecting plate 251a are located on the same side of the base 24. Furthermore, the first hinge member 251c is hinged to one side of the base 24. When the rotating mechanism 23 switches between the unfolded and folded states, the first door panel 26 and the first hinge member 251c can slide relative to each other in a direction perpendicular to the first direction A.

[0307] In this way, the first connecting plate 251a, the first connecting member 251b, the first door panel 26, the first hinge member 251c, and the base 24 can constitute a crank-slider mechanism. The force applied by the user to the first housing 21 can act on the first connecting plate 251a. When the force acting on the first connecting plate 251a causes it to rotate relative to the base 24, the mechanical linkage of the first connecting plate 251a, the first connecting member 251b, and the first hinge member 251c will cause the first door panel 26 to rotate relative to the base 24. Furthermore, due to the sliding fit between the first door panel 26 and the first hinge member 251c, when the first connecting plate 251a causes the first door panel 26 to rotate, the first door panel 26 can slide relative to the base 24 in a direction perpendicular to the first direction A, thereby causing the end of the first door panel 26 near the base 24 to move in a direction away from or near the base 24. It is understandable that in other examples, the rotating assembly 25 may not include the first connecting member 251b and the first hinge member 251c, as long as the first door panel 26 can slide relative to the base 24 in a direction perpendicular to the first direction A when the first connecting plate 251a drives the first door panel 26 to rotate. Furthermore, since there are connections between the first door panel 26 and the first connecting plate 251a, as well as between the first swing arm 251d and the first connecting plate 251a, the linkage between the various components can be achieved when an external force is applied to the first connecting plate 251a.

[0308] Please continue reading. Figure 18 The first connecting plate 251a has a first arc-shaped elongated groove 251a2 on one end face along the first direction A. The center line of the first arc-shaped elongated groove 251a2 extends along the first direction A. Please refer to... Figure 19 , Figure 19 According to Figure 8The diagram shows a partial structural schematic of the first door panel 26 in the rotating mechanism 23. A connecting portion 261 is provided at the end of the first door panel 26 along the first direction A. Specifically, the connecting portion 261 can be fixed to the first door panel 26 by means of threaded connection, riveting, bonding, etc., or it can be integrally formed with the first door panel 26. A second arc-shaped rib 2611 is provided on the connecting portion 261. The extension path of the second arc-shaped rib 2611 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 semi-circular arc (i.e., an arc with a central angle equal to 180°), and is not specifically limited here. Figure 19 In the illustrated embodiment, the extension path of the second arc-shaped rib 2611 is a minor arc. The second arc-shaped rib 2611 can be fitted and accommodated within the first arc-shaped long groove 251a2, and can rotate around the center line of the first arc-shaped long groove 251a2. Thus, a hinge connection is achieved between the first door panel 26 and the first connecting plate 251a.

[0309] Please continue reading. Figure 19 The first door panel 26 is provided with an avoidance notch 262, which is used to avoid the first connecting member 251b, thereby preventing the rotation of the first connecting member 251b from interfering with the rotation of the first door panel 26 and improving the reliability of the operation of the rotation mechanism 23.

[0310] Please continue reading. Figure 19 ,as well as Figure 20 , Figure 20 According to Figure 9 The diagram shows an enlarged view of the portion of the rotating mechanism 23 circled at point F. A sliding block 263 is fixed to the surface of the first door panel 26 opposite to the support surface M5 of the first door panel 26. A sliding groove 2631 is formed on the sliding block 263. The first hinge member 251c is inserted into the sliding groove 2631, thereby slidingly engaging with the first door panel 26.

[0311] Please continue reading. Figure 20 The base 24 has a third shaft hole 2412, the center line of which is parallel to the center line of the first arc-shaped rib 251b1. The end of the first hinge member 251c furthest from the first door panel 26 has a fourth shaft hole 251c1. The rotating mechanism 23 also includes a second pivot shaft 251c2. The second pivot shaft 251c2 passes through the third shaft hole 2412 and the fourth shaft hole 251c1. This arrangement allows for hinge connection between the first hinge member 251c and the base 24. Therefore, the implementation is simple, easy to implement, and has low manufacturing costs.

[0312] Based on the above embodiments, please refer back again. Figures 8-10The second connecting plate 252a is fixed to the second housing 22. Specifically, the second connecting plate 252a is fixed to the second middle frame 221. For example, the second connecting plate 252a can be fixed to the second middle frame 221 by means of threaded connection, riveting, bonding, etc., or it can be integrally formed with the second middle frame 221.

[0313] The second connecting plate 252a is hinged to the other side of the base 24 (e.g., the other side in the width direction). Specifically, the second connecting plate 252a is hinged to the other side of the base 24 via a second connecting member 252b. That is, one end of the second connecting member 252b is hinged to the other side of the base 24. The hinge axis of the second connecting member 252b relative to the base 24 extends along a first direction A. The other end of the second connecting plate 252a is hinged to the second connecting member 252b, and the hinge axis of the second connecting plate 252a relative to the second connecting member 252b extends along the first direction A.

[0314] The second swing arm 252d and the second connecting plate 252a are located on the same side of the base 24. The second swing arm 252d is hinged to the other side of the base 24. The hinge axis of the second swing arm 252d relative to the base 24 extends along a first direction A. The second swing arm 252d and the second connecting plate 252a are spaced apart in the first direction A. When the rotating mechanism 23 switches between an unfolded state and a folded state, the second swing arm 252d can slide relative to the second connecting plate 252a in a direction perpendicular to the first direction A.

[0315] When the second swing arm 252d slides relative to the second connecting plate 252a in a direction perpendicular to the first direction A, it can slide to a first locked position and a second locked position relative to the second connecting plate 252a. When the second swing arm 252d slides relative to the second connecting plate 252a to the first locked position, the rotating mechanism 23 is in an unfolded state; when the second swing arm 252d slides relative to the second connecting plate 252a to the second locked position, the rotating mechanism 23 is in a folded state.

[0316] The second multistable flexible mechanism 252e is disposed on the second connecting plate 252a. The second multistable flexible mechanism 252e has a first stable state and a second stable state. The second multistable flexible mechanism 252e cooperates with the second swing arm 252d, and the second multistable flexible mechanism 252e switches between the first stable state and the second stable state as the second swing arm 252d slides relative to the second connecting plate 252a.

[0317] In the folded state of the rotating mechanism 23, the second multistable flexible mechanism 252e is in the second stable state, locking the second swing arm 252d in the second locked position; in the unfolded state of the rotating mechanism 23, the second multistable flexible mechanism 252e is in the first stable state (e.g., Figure 9 (as shown in the diagram) to lock the second swing arm 252d in the first locking position. That is, in the folded state of the rotating mechanism 23, the second multistable flexible mechanism 252e can restrict the sliding of the second swing arm 252d relative to the second connecting plate 252a, thereby locking the second swing arm 252d in the second locking position; in the unfolded state of the rotating mechanism 23, the second multistable flexible mechanism 252e can also restrict the sliding of the second swing arm 252d relative to the second connecting plate 252a, thereby locking the second swing arm 252d in the first locking position.

[0318] In this way, when the second multistable flexible mechanism 252e locks the second swing arm 252d in the second locking position, the second swing arm 252d will no longer slide along the second connecting plate 252a when there is no external force applied by the user, thus allowing the rotating mechanism 23 to maintain its current folded state. When the second multistable flexible mechanism 252e locks the second swing arm 252d in the first locking position, the second swing arm 252d will also no longer slide along the second connecting plate 252a when there is no external force applied by the user, thus allowing the rotating mechanism 23 to maintain its current unfolded state. Specifically, the structure, assembly, and movement of the second connecting plate 252a, the second connecting member 252b, the second swing arm 252d, and the second multistable flexible mechanism 252e are the same as those of the first connecting plate 251a, the first connecting member 251b, the first swing arm 251d, and the first multistable flexible mechanism 251e, respectively, and will not be described in detail here.

[0319] Please continue reading. Figures 9-10 The second hinge 252c is hinged to the other side of the base 24. The second door panel 27 is hinged to the second connecting plate 252a. The second connecting plate 252a is located on the side of the second door panel 26 opposite to the support surface M6. When the rotating mechanism 23 switches between the unfolded state and the folded state, the second door panel 27 and the second hinge 252c can slide relative to each other in a direction perpendicular to the first direction A. In this way, the base 24, the second connecting plate 252a, the second hinge 252c, the second connecting member 252b, and the second door panel 27 can also form a crank-sliding mechanism. That is, when an external force is applied to the second connecting plate 252a to make it rotate relative to the base 24, the second door panel 27 will also be driven to rotate under the mechanical linkage of the second connecting plate 252a, the second connecting member 252b, and the second hinge 252c. Specifically, in this application, the structure, assembly and movement of the second hinge 252c and the second door panel 27 are the same as those of the first hinge 251c and the first door panel 26, and will not be repeated here.

[0320] Based on this, please refer to Figure 21 , Figure 21 According to Figure 8The diagram shows the engagement of the first swing arm 251d, the second swing arm 252d, and the two third gears 253 in the rotating mechanism 23. To achieve linkage between the first housing 21 and the second housing 22, one end of the first swing arm 251d adjacent to the base 24 is configured as the first gear 251d4, and one end of the second swing arm 252d adjacent to the base 24 is configured as the second gear 252d4. The first gear 251d4 and the second gear 252d4 can mesh together.

[0321] Specifically, since the first swing arm 251d and the second swing arm 252d are located on opposite sides of the base 24, in order not to affect the cooperation between the first swing arm 251d and the first multistable flexible mechanism 251e on the first connecting plate 251a, and the cooperation between the second swing arm 252d and the second multistable flexible mechanism 252e, the first gear 251d4 and the second gear 252d4 are spaced apart, and two meshing third gears 253 are provided between the first gear 251d4 and the second gear 252d4. The first gear 251d4 and the second gear 252d4 achieve linkage between the first swing arm 251d and the second swing arm 252d through the meshing of the two third gears 253. In this way, when the user applies a force to one of the first housing 21 and the second housing 22, both housings can be driven to move simultaneously. Each third gear 253 is rotatably fixed to the base 24. The way the third gear 253 engages with the base 24 is the same as the way the first swing arm 251d engages with the base 24.

[0322] The structure of the first multistable flexible mechanism 251e provided in other embodiments will be described below.

[0323] Please see Figure 22 , Figure 22 This is a schematic diagram of the second type of first multistable flexible mechanism 251e provided in the embodiments of this application. Figure 22 The first multistable flexible mechanism 251e shown is... Figures 8-18 The difference in the first multistable flexible mechanism 251e shown is that there are multiple first compliant bistable units 251e1 and multiple second compliant bistable units 251e2. Furthermore, the number of first compliant bistable units 251e1 and the number of second compliant bistable units 251e2 can be the same or different.

[0324] Here, "multiple" refers to two or more. For example, there are two first compliant bistable units 251e1 and two second compliant bistable units 251e2. Of course, it is understood that in other examples, there could be multiple first compliant bistable units 251e1 and one second compliant bistable unit 251e2. Alternatively, there could be one first compliant bistable unit 251e1 and multiple second compliant bistable units 251e2. The key is to ensure that at least one of the first compliant bistable units 251e1 and the second compliant bistable unit 251e2 is multiple.

[0325] In the rotating mechanism 23 of this application embodiment, by making both the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 multiple, it is beneficial to multiply the driving force used to drive the first swing arm 251d to slide, so that the connecting block 251e3 can move stably and improve the damping feel of the rotating mechanism 23.

[0326] Please see Figure 23 , Figure 23 A schematic diagram of the third type of first multistable flexible mechanism 251e provided in the embodiments of this application. Figure 23 The first multistable flexible mechanism 251e shown is... Figures 8-18 The difference in the first multistable flexible mechanism 251e shown is that the second compliant beam unit 251e21 is a sheet-like structure with a uniform cross-sectional area everywhere; that is, the second compliant beam unit 251e21 is a sheet-like elastic structure with a uniform cross-sectional area everywhere. For example, the stiffness of the second compliant beam unit 251e21 is uniform everywhere. Therefore, the structure of the second compliant beam unit 251e21 is simple and easy to manufacture. Moreover, the shape of the second compliant beam unit 251e21 is different from that of the first compliant beam unit 251e11. This allows the entire first multistable flexible mechanism 251e to have at least three stable states, thereby enabling the electronic device 100 to fold, unfold, and hover in an intermediate state between the folded and unfolded states. The entire structure is simple, frictionless, and highly reliable.

[0327] Please see Figure 24 , Figure 24 A schematic diagram of the fourth type of first multistable flexible mechanism 251e provided in the embodiments of this application. Figure 24 The first multistable flexible mechanism 251e shown is... Figures 8-18The difference in the first multistable flexible mechanism 251e shown is that: the first compliant beam unit 251e11 is a sheet-like structure with a uniform cross-sectional area everywhere, that is, the first compliant beam unit 251e11 is a sheet-like spring-like structure with a uniform cross-sectional area everywhere; similarly, the second compliant beam unit 251e21 is a sheet-like spring-like structure with a uniform cross-sectional area everywhere. For example, the stiffness of the first compliant beam unit 251e11 is uniform everywhere. Therefore, the structure of the first compliant beam unit 251e11 is simple and easy to manufacture. The second compliant beam unit 251e21 is also a sheet-like structure with a uniform cross-sectional area everywhere, that is, the second compliant beam unit 251e21 is a sheet-like spring-like structure with a uniform cross-sectional area everywhere. For example, the stiffness of the second compliant beam unit 251e21 is uniform everywhere. Therefore, the structure of the second compliant beam unit 251e21 is simple and easy to manufacture.

[0328] Specifically, the second compliant beam unit 251e21 has a different length than the first compliant beam unit 251e11. This allows the second compliant beam unit 251e21 and the first compliant beam unit 251e11 to be connected to the connecting block 251e3 and the fixing part 251e4 respectively, enabling them to be non-parallel. Thus, the entire first multistable flexible mechanism 251e has at least three stable states, thereby enabling the electronic device 100 to fold, unfold, and hover between the folded and unfolded states. The entire structure is simple, frictionless, and highly reliable.

[0329] Please see Figure 25 , Figure 25 A schematic diagram of the fifth type of first multistable flexible mechanism 251e provided in the embodiments of this application. Figure 25 The first multistable flexible mechanism 251e shown is... Figures 8-18 The difference in the first multistable flexible mechanism 251e shown is that a portion of the first multistable flexible mechanism 251e is located within the sliding space 251f. Specifically, the first rigid member 251e112 of each first compliant beam unit 251e11 is located on one side of the corresponding fixed part 251e4 along the moving direction of the connecting block 251e3. The first flexible beam 251e113 of each first compliant beam unit 251e11 is located on the side of the corresponding fixed part 251e4 opposite to the other fixed part 251e4 and is connected to the corresponding fixed part 251e4. Furthermore, the first rigid member 251e112 is U-shaped.

[0330] The second compliant beam element 251e21 is a sheet with a uniform cross-sectional area everywhere. This ensures that the stiffness of the second compliant beam element 251e21 is uniform everywhere. Consequently, the structure of the second compliant beam element 251e21 is simple and easy to manufacture.

[0331] Furthermore, the shape of the second compliant beam unit 251e21 is different from that of the first compliant beam unit 251e11. Thus, the entire first multistable flexible mechanism 251e has at least three stable states, thereby enabling the electronic device 100 to fold, unfold, and hover between the folded and unfolded states. The entire structure is simple, frictionless, and highly reliable.

[0332] Please see Figure 26 , Figure 26 A schematic diagram of the sixth type of first multistable flexible mechanism 251e provided in the embodiments of this application. Figure 26 The first multistable flexible mechanism 251e shown is... Figures 8-18 The difference in the first multistable flexible mechanism 251e shown is that a groove 251e32 is formed on one side surface of the connecting block 251e3 in the direction of movement of the connecting block 251e3. The first compliant beam 251e111 of each first compliant beam unit 251e11 is located in the groove 251e32 and connected to the groove wall of the groove 251e32. The first rigid member 251e112 is located on the side facing the surface of the connecting block 251e3 with the groove 251e32. The fixing part 251e4 has a surface C facing the same direction as the surface of the connecting block 251e3 with the groove 251e32, and the first rigid member 251e112 is located on the side facing the surface C. Furthermore, the first rigid member 251e112 is U-shaped. The first flexible beam 251e113 of each first compliant beam unit 251e11 is located on the side of the corresponding fixed part 251e4 away from the other fixed part 251e4, and is connected to the corresponding fixed part 251e4.

[0333] The second compliant beam element 251e21 is a sheet with a uniform cross-sectional area everywhere. This ensures that the stiffness of the second compliant beam element 251e21 is uniform everywhere. Consequently, the structure of the second compliant beam element 251e21 is simple and easy to manufacture.

[0334] Furthermore, the shape of the second compliant beam unit 251e21 is different from that of the first compliant beam unit 251e11. In this way, the entire first multistable flexible mechanism 251e can have at least three stable states, thereby enabling the electronic device 100 to fold, unfold, and hover between the folded and unfolded states. The entire structure is simple, frictionless, and highly reliable.

[0335] Please see Figure 27 , Figure 27 This is a schematic diagram illustrating the cooperation between the seventh type of first multistable flexible mechanism 251e provided in this application embodiment and the first connecting plate 251a and the first swing arm 251d. This example is related to... Figures 8-26The difference in the example shown is that the first multistable flexible mechanism 251e does not include the second compliant bistable unit 251e2, but instead includes the first compliant bistable unit 251e2. In this case, the first multistable flexible mechanism 251e is a bistable flexible mechanism. This enables the electronic device 100 to switch between a folded state and an unfolded state.

[0336] The working principle of the first multistable flexible mechanism 251e will be explained below based on its structure.

[0337] Please see Figure 28 , Figure 28 According to Figure 27 The graph shows the relationship between the force acting on the first multistable flexible mechanism 251e and the displacement of the connecting block. Figure 28 As can be seen, the first multistable flexible mechanism 251e has two stable states, R1 (i.e., the first stable state) and R2 (i.e., the second stable state), and an unstable state with the highest energy, X1. For details, please refer to 29 and... Figure 30 , Figure 29 According to Figure 27 A schematic diagram of the first multistable flexible mechanism 251e in the first stable state shown; Figure 30 According to Figure 27 The diagram shows a first multistable flexible mechanism 251e in the second stable state. When the user applies a force to the first housing 21, causing the first connecting plate 251a to rotate relative to the base 24, moving from the unfolded state to the folded state, the connecting block 251e3 moves in the direction of arrow F, causing deformation of the first compliant beam 251e111 and the first flexible beam 251e113, and also causing the first rigid member 251e112 to rotate. Before the connecting block 251e3 moves from the first stable state R1 to the highest energy unstable state X1, the entire mechanism continuously stores deformation energy. When the connecting block 251e3 moves past the highest energy unstable state X1 towards the second stable state R2, the first compliant bistable unit 251e1 releases the stored deformation energy and outputs a force to push the connecting block 251e3 to continue moving until the second stable state R2 is reached, thus placing the electronic device 100 in the folded state. It is understood that the movement from the folded state to the unfolded state is the reverse of the above-described movement process, and will not be elaborated further here.

[0338] In the rotating mechanism 23 of this application embodiment, when the first multistable flexible mechanism 251e only includes the first compliant bistable unit 251e1 or the second compliant bistable unit 251e2, the entire first multistable flexible mechanism 251e can have two stable states, thereby enabling the folding and unfolding of the electronic device 100. The entire structure is simple, frictionless, and highly reliable.

[0339] It can be understood that when the first compliant bistable unit 251e1 and the second compliant bistable unit 251e2 mentioned above are the same, the entire first multistable flexible mechanism 251e exhibits bistable characteristics.

[0340] Since the support device 20 provided in this application embodiment includes the rotation mechanism 23 of any of the above embodiments, the two can solve the same technical problem and achieve the same effect.

[0341] Since the electronic device 100 provided in some embodiments of this application includes the above-described support device 20, the two can solve the same technical problem and achieve the same effect.

[0342] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0343] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An electronic device, characterized in that, include: Rotating mechanism, first housing, and folding screen; The foldable screen includes a first part and a third part connected together; The rotating mechanism includes a base, a first swing arm, a first connecting plate, and a first multistable flexible mechanism; The first swing arm is hinged to one side of the base; The first connecting plate is used to fix the first housing. The first connecting plate and the first swing arm are located on the same side of the base, and the first connecting plate is hinged to one side of the base. The hinge axis of the first connecting plate relative to the base and the hinge axis of the first swing arm relative to the base both extend along the first direction. When the rotating mechanism switches between the unfolded state and the folded state, the first swing arm slides relative to the first connecting plate perpendicular to the first direction. Both the base and the first housing have a support surface. The support surface of the first housing is used to support and fix the first part, and the support surface of the base is used at least to support the third part in the unfolded state. The first multi-stable flexible mechanism is disposed on the first connecting plate and is used to lock the rotating mechanism in a folded state and an unfolded state; In the unfolded and folded states of the rotating mechanism, the first multistable flexible mechanism can restrict the sliding of the first swing arm relative to the first connecting plate; the first multistable flexible mechanism has a first stable state and a second stable state, and the first multistable flexible mechanism cooperates with the first swing arm to switch between the first stable state and the second stable state. In the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the first housing are coplanar and face the same direction, and the first multistable flexible mechanism is in a first stable state to lock the first swing arm in a first locking position relative to the first connecting plate; in the folded state of the rotating mechanism, the support surface of the first housing is perpendicular to the support surface of the base, and the first multistable flexible mechanism is in a second stable state to lock the first swing arm in a second locking position relative to the first connecting plate.

2. The electronic device according to claim 1, characterized in that, The first multi-stable flexible mechanism includes: a first compliant bistable unit, the first compliant bistable unit includes two first compliant beam units, the two first compliant beam units are arranged in a first direction and symmetrically arranged in the first direction, one end of the two first compliant beam units adjacent to each other is fixed relative to the first swing arm, and the other end of the two first compliant beam units away from each other is fixed relative to the first connecting plate. Wherein, the length dimension of the extension trajectory of the first compliant beam unit is greater than the vertical distance between one end of the first compliant beam unit and the other end of the first compliant beam unit in the first direction.

3. The electronic device according to claim 2, characterized in that, The first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; One end of the first compliant beam is fixed relative to the first swing arm, one end of the first flexible beam is fixed relative to the first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam. Wherein, the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam.

4. The electronic device according to claim 3, characterized in that, The cross-sectional area of ​​the first rigid member is greater than the cross-sectional area of ​​the first flexible beam, and the cross-sectional area of ​​the first rigid member is greater than the cross-sectional area of ​​the first flexible beam.

5. The electronic device according to claim 3 or 4, characterized in that, Both the first compliant beam and the first flexible beam are sheet-like.

6. The electronic device according to claim 2 or 3, characterized in that, The first compliant beam element is a sheet with a uniform cross-sectional area everywhere.

7. The electronic device according to any one of claims 2-4, characterized in that, The rotating mechanism has an intermediate hovering state, which is located on the switching path of the rotating mechanism between the unfolded state and the folded state; The first multistable flexible mechanism also has a third stable state, which is located on the switching path of the first multistable flexible mechanism between the first stable state and the second stable state. In the intermediate hovering state of the rotating mechanism, the first multistable flexible mechanism is in the third stable state to lock the first swing arm in a third locking position relative to the first connecting plate. The third locking position is located on the switching path of the first swing arm between the first locking position and the second locking position.

8. The electronic device according to claim 7, characterized in that, The first multi-stable flexible mechanism further includes a second compliant bistable unit, which is arranged with the first compliant bistable unit in the sliding direction of the first swing arm relative to the first connecting plate. The second compliant bistable unit includes two second compliant beam units, which are arranged in a first direction. The two second compliant beam units are symmetrically arranged with respect to the symmetry line of the two first compliant beam units. One end of each of the two adjacent second compliant beam units is fixed relative to the first swing arm, and the other end of each of the two second compliant beam units is fixed relative to the first connecting plate. The length of the extension trajectory of the second compliant beam unit is greater than the vertical distance between one end of the second compliant beam unit and the other end of the second compliant beam unit in the first direction. The material, shape, and size of the second compliant beam unit are different from those of the first compliant beam unit.

9. The electronic device according to claim 8, characterized in that, The second compliant beam unit includes: a second compliant beam, a second rigid member, and a second flexible beam; One end of the second compliant beam is fixed relative to the first swing arm, one end of the second flexible beam is fixed relative to the first connecting plate, and the second rigid member is connected between the other end of the second compliant beam and the other end of the second flexible beam. The stiffness of the second rigid member is greater than that of the second flexible beam, and the stiffness of the second rigid member is greater than that of the second flexible beam.

10. The electronic device according to claim 9, characterized in that, The cross-sectional area of ​​the second rigid member is greater than the cross-sectional area of ​​the second compliant beam, and the cross-sectional area of ​​the second rigid member is greater than the cross-sectional area of ​​the second compliant beam.

11. The electronic device according to claim 9 or 10, characterized in that, Both the second compliant beam and the second flexible beam are sheet-like.

12. The electronic device according to claim 9 or 10, characterized in that, The first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; One end of the first compliant beam is fixed relative to the first swing arm, and one end of the first flexible beam is fixed relative to the first connecting plate. The first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam. The stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam. Wherein, the first compliant beam and the second compliant beam have different dimensions; and / or, the first flexible beam and the second flexible beam have different dimensions; and / or, the first compliant beam and the second compliant beam are not parallel; and / or, the first flexible beam and the second flexible beam are not parallel.

13. The electronic device according to claim 8, characterized in that, The second compliant beam element is a sheet with a uniform cross-sectional area everywhere.

14. The electronic device according to claim 13, characterized in that, The first compliant beam element is a sheet with a uniform cross-sectional area everywhere; The second compliant beam unit has a different length than the first compliant beam unit.

15. The electronic device according to any one of claims 2-4, characterized in that, The first multi-stable flexible mechanism includes: a connecting block, the connecting block being fixed to the first swing arm, and two first compliant beam units of the first compliant bistable unit being symmetrically arranged relative to the central axis of the connecting block extending in the sliding direction of the first swing arm, with one end of the two first compliant beam units adjacent to each other being fixedly connected to the connecting block.

16. The electronic device according to claim 15, characterized in that, The two first compliant beam units of the first compliant bistable unit are located on both sides of the connecting block in the first direction.

17. The electronic device according to any one of claims 2-4, characterized in that, The two first compliant beam units of the first compliant bistable unit are symmetrically arranged relative to the central axis of the first swing arm extending in the sliding direction of the first swing arm.

18. The electronic device according to any one of claims 2-4, characterized in that, The first multi-stable flexible mechanism includes two fixing parts, which are arranged opposite to each other in a first direction and are respectively fixed to the first connecting plate to define a sliding space between them. A portion of the first swing arm and at least a portion of the first compliant bistable unit are located within the sliding space. The two first compliant beam units of the first compliant bistable unit correspond one-to-one with the two fixing parts, and each first compliant beam unit is connected to the first connecting plate through the corresponding fixing part.

19. The electronic device according to claim 18, characterized in that, Guide grooves are formed on the opposing surfaces of the two fixed parts, and the two ends of the first swing arm along the first direction are respectively fitted into the guide grooves.

20. The electronic device according to any one of claims 1-4, characterized in that, The foldable screen further includes a second portion connected to the side of the third portion away from the first portion; the electronic device further includes a second housing; and the rotating mechanism further includes: The second swing arm is hinged to the other side of the base; The second connecting plate is used to fix the second housing. The second connecting plate and the second swing arm are located on the same side of the base and are hinged to the other side of the base. The hinge axis of the second connecting plate relative to the base and the hinge axis of the second swing arm relative to the base both extend along the first direction. When the rotating mechanism switches between the unfolded state and the folded state, the second swing arm slides relative to the second connecting plate perpendicular to the first direction. The second housing has a support surface, which is used to support and fix the second part. The second multi-stable flexible mechanism is disposed on the second connecting plate and has a first stable state and a second stable state. The second multi-stable flexible mechanism cooperates with the second swing arm to switch between the first stable state and the second stable state. In the unfolded state of the rotating mechanism, the support surface of the base and the support surface of the first housing are coplanar and face the same direction, and the second multistable flexible mechanism is in a first stable state to lock the second swing arm in a first locking position relative to the second connecting plate; in the folded state of the rotating mechanism, the support surface of the second housing is perpendicular to the support surface of the base, and the second multistable flexible mechanism is in a second stable state to lock the second swing arm in a second locking position relative to the second connecting plate.

21. The electronic device according to claim 20, characterized in that, The structure of the second multistable flexible mechanism is the same as that of the first multistable flexible mechanism. The cooperation relationship between the second multistable flexible mechanism and the second swing arm is the same as that between the first multistable flexible mechanism and the first swing arm. The cooperation relationship between the second multistable flexible mechanism and the second connecting plate is the same as that between the first multistable flexible mechanism and the first connecting plate.

22. A rotating mechanism, characterized in that, Includes a base, a first swing arm, a first connecting plate, and a first multi-stable flexible mechanism; The first swing arm is hinged to one side of the base; The first connecting plate and the first swing arm are located on the same side of the base, and the first connecting plate is hinged to one side of the base. The hinge axis of the first connecting plate relative to the base and the hinge axis of the first swing arm relative to the base both extend along the first direction. When the rotating mechanism switches between the unfolded state and the folded state, the first swing arm slides perpendicular to the first direction relative to the first connecting plate. The first multistable flexible mechanism is disposed on the first connecting plate and is used to lock the rotating mechanism in a folded state and an unfolded state; the first multistable flexible mechanism has a first stable state and a second stable state, and the first multistable flexible mechanism cooperates with the first swing arm to switch between the first stable state and the second stable state. In the unfolded state of the rotating mechanism, the first multistable flexible mechanism is in a first stable state to lock the first swing arm in a first locking position relative to the first connecting plate; in the folded state of the rotating mechanism, the first multistable flexible mechanism is in a second stable state to lock the first swing arm in a second locking position relative to the first connecting plate.

23. The rotating mechanism according to claim 22, characterized in that, The first multi-stable flexible mechanism includes: a first compliant bistable unit, the first compliant bistable unit includes two first compliant beam units, the two first compliant beam units are arranged in a first direction and symmetrically arranged in the first direction, one end of the two first compliant beam units adjacent to each other is fixed relative to the first swing arm, and the other end of the two first compliant beam units away from each other is fixed relative to the first connecting plate. Wherein, the length dimension of the extension trajectory of the first compliant beam unit is greater than the vertical distance between one end of the first compliant beam unit and the other end of the first compliant beam unit in the first direction.

24. The rotating mechanism according to claim 23, characterized in that, The first compliant beam unit includes: a first compliant beam, a first rigid member, and a first flexible beam; One end of the first compliant beam is fixed relative to the first swing arm, one end of the first flexible beam is fixed relative to the first connecting plate, and the first rigid member is connected between the other end of the first compliant beam and the other end of the first flexible beam. Wherein, the stiffness of the first rigid member is greater than the stiffness of the first compliant beam, and the stiffness of the first rigid member is greater than the stiffness of the first flexible beam.

25. The rotating mechanism according to claim 24, characterized in that, The cross-sectional area of ​​the first rigid member is greater than the cross-sectional area of ​​the first flexible beam, and the cross-sectional area of ​​the first rigid member is greater than the cross-sectional area of ​​the first flexible beam.

26. The rotating mechanism according to any one of claims 23-25, characterized in that, The rotating mechanism has an intermediate hovering state, which is located on the switching path of the rotating mechanism between the unfolded state and the folded state; The first multistable flexible mechanism also has a third stable state, which is located on the switching path of the first multistable flexible mechanism between the first stable state and the second stable state. In the intermediate hovering state of the rotating mechanism, the first multistable flexible mechanism is in the third stable state to lock the first swing arm in a third locking position relative to the first connecting plate. The third locking position is located on the switching path of the first swing arm between the first locking position and the second locking position.

27. The rotating mechanism according to claim 26, characterized in that, The first multi-stable flexible mechanism further includes a second compliant bistable unit, which is arranged with the first compliant bistable unit in the sliding direction of the first swing arm relative to the first connecting plate. The second compliant bistable unit includes two second compliant beam units, which are arranged in a first direction. The two second compliant beam units are symmetrically arranged with respect to the symmetry line of the two first compliant beam units. One end of each of the two adjacent second compliant beam units is fixed relative to the first swing arm, and the other end of each of the two second compliant beam units is fixed relative to the first connecting plate. The length of the extension trajectory of the second compliant beam unit is greater than the vertical distance between one end of the second compliant beam unit and the other end of the second compliant beam unit in the first direction. The material, shape, and size of the second compliant beam unit are different from those of the first compliant beam unit.

28. The rotating mechanism according to any one of claims 23-25, characterized in that, The first multi-stable flexible mechanism includes: a connecting block, the connecting block being fixed to the first swing arm, and two first compliant beam units of the first compliant bistable unit being symmetrically arranged relative to the central axis of the connecting block extending in the sliding direction of the first swing arm, with one end of the two first compliant beam units adjacent to each other being fixedly connected to the connecting block.

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