Rotating shaft mechanism and foldable electronic device

Abstract

A rotating shaft mechanism (23) and a foldable electronic device (100). The rotating shaft mechanism (23) comprises a base (230), a first swing arm (2312), and a first supporting member (233); the first swing arm (2312) is rotatably connected to the base (230); the first swing arm (2312) is provided with a first sliding member (2351) and a second sliding member (2352) which are arranged in a first direction; the first supporting member (233) can rotate relative to the base (230); the first supporting member (233) is provided with a first fitting member (2361) and a second fitting member (2362); the first fitting member (2361) comprises a first fitting surface (2361a); the second fitting member (2362) comprises a second fitting surface (2362a); when the rotating shaft mechanism (23) is switched between an unfolded state and a folded state, the first sliding member (2351) is in sliding fit with the first fitting surface (2361a), and the second sliding member (2352) is in sliding fit with the second fitting surface (2362a); and at least a part of the first fitting surface (2361a) is located on the surface of the first fitting member (2361) facing the first supporting member (233), and / or at least a part of the second fitting surface (2362a) is located on the surface of the second fitting member (2362) facing away from the first supporting member (233).

Description

Rotating shaft mechanism and foldable electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, and in particular to a rotating shaft mechanism and a foldable electronic device. BACKGROUND

[0002] With the development of terminal technology, the display screen size of electronic devices such as mobile phones is getting larger and larger. In order to solve the problem of large size and inconvenience of carrying of traditional tablet electronic devices, foldable electronic devices have emerged. The foldable electronic device includes a folding screen and a shell assembly for supporting the folding screen, and the shell assembly usually includes a first shell, a second shell and a rotating shaft mechanism. The first shell and the second shell are rotationally connected by the rotating shaft mechanism to realize unfolding or folding of the folding screen.

[0003] However, the rotating shaft mechanism in the related art has a large volume, which becomes a bottleneck for the realization of thinness and long battery life of the foldable electronic device. How to reduce the volume of the rotating shaft mechanism is one of the technical problems to be solved at present.

[0004] SUMMARY

[0005] The present application provides a rotating shaft mechanism and a foldable electronic device, which can reduce the volume of the rotating shaft mechanism and facilitate the further thinning and / or narrowing of the foldable electronic device.

[0006] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a rotating shaft mechanism, which includes a base, a first swing arm and a first support. The first swing arm is rotationally connected to the base and can rotate relative to the base about a first axis to switch the rotating shaft mechanism between an unfolded state and a folded state. The first axis extends in a first direction. The first swing arm is provided with a first sliding member and a second sliding member, and the first sliding member and the second sliding member are arranged in the first direction. The first support is rotatable relative to the base. The first support is provided with a first cooperating member and a second cooperating member. The first cooperating member includes a first cooperating surface, and the second cooperating member includes a second cooperating surface. When the rotating shaft mechanism is switched between the unfolded state and the folded state, the first sliding member is in sliding cooperation with the first cooperating surface, and the second sliding member is in sliding cooperation with the second cooperating surface. At least a part of the first cooperating surface is located on a surface of the first cooperating member facing the first support, and / or at least a part of the second cooperating surface is located on a surface of the second cooperating member facing away from the first support.

[0008] The hinge mechanism in the present application, on the one hand, by setting at least a part of the first matching surface on the surface of the first matching part facing the first support part, without setting a top wall surface on the first matching part for matching with the first sliding part, can reduce the thickness of the first matching part while ensuring the reliable matching between the first sliding part and the first matching part, thereby facilitating the reduction of the thickness of the hinge mechanism and realizing the lightweight design of the hinge mechanism.

[0009] By setting at least a part of the second matching surface on the surface of the second matching part away from the first support part, without setting a bottom wall surface on the second matching part for matching with the second sliding part, the thickness of the second matching part can be reduced while ensuring the reliable matching between the second sliding part and the second matching part, thereby facilitating the reduction of the thickness of the hinge mechanism and realizing the lightweight design of the hinge mechanism.

[0010] On the other hand, since the first matching surface and the second matching surface are staggered in the first direction, the thickness of the first sliding part and the thickness of the second sliding part are not constrained by the spacing of the first matching surface and the second matching surface in the second direction, which facilitates the increase of the thickness of the first matching part and the thickness of the second matching part, thereby being able to reduce the thickness of the hinge mechanism while improving the structural strength of the first matching part and the structural strength of the first matching part, and realizing the lightweight design of the hinge mechanism. On the other hand, in the process of switching the hinge mechanism between the unfolded state and the folded state, the transmission connection between the first swing arm and the first support part is realized by the contact matching between the first sliding part and the first matching surface and the contact matching between the second sliding part and the second matching surface, the sliding contact area between the first swing arm and the first support part is small, which is conducive to reducing the friction resistance, and can avoid the situation that the hinge mechanism is stuck or dead during folding, which is conducive to improving the smoothness of the folding process of the hinge mechanism and improving the folding feel of the foldable electronic device.

[0011] In a possible implementation manner of the first aspect, the orthographic projection of the first sliding part on the first reference plane overlaps the orthographic projection of the second matching part on the first reference plane. The first reference plane is perpendicular to the first direction. That is, a part of the first sliding part is opposite to the second matching part in the first direction, or the entire first sliding part is opposite to the second matching part in the first direction.

[0012] In this way, it is conducive to reducing the spacing between the first matching surface and the first bottom surface, and at the same time, it is conducive to increasing the spacing between the second matching surface and the first bottom surface, thereby being able to reduce the superimposed thickness of the first matching part, the first sliding part and the first support part while ensuring the thickness of the first matching part and the thickness of the second matching part, and thereby realizing the lightweight design of the hinge mechanism.

[0013] In a possible implementation manner of the first aspect, the orthographic projection of the second sliding member on the first reference plane overlaps the orthographic projection of the first matching member on the first reference plane, and the first reference plane is perpendicular to the first direction. In this way, the distance between the second matching surface and the first matching surface in the second direction can be reduced, so that the superimposed thickness of the first support member, the second matching member and the second sliding member can be reduced while the thickness of the first matching member and the thickness of the second matching member are ensured, and thus the thin and light design of the rotating shaft mechanism can be realized. The second direction is the thickness direction of the first support member.

[0014] In a possible implementation manner of the first aspect, the first matching member includes opposite first inner ends and first outer ends, and the first inner ends are located on the side of the first outer ends close to the base; the first support member includes a first bottom surface facing the first swing arm, the first inner ends are connected to the first bottom surface, and the first outer ends are spaced apart from the first bottom surface. In this way, the size of the first matching surface in the second direction can be increased, and the size of the first matching surface in the third direction can be reduced, so that the width of the first matching member can be further reduced, and the narrow design of the rotating shaft mechanism can be realized. Meanwhile, the first mounting opening can be defined between the first outer ends and the first bottom surface, the first sliding member can be assembled to between the first bottom surface and the first matching surface through the first mounting opening, and the assembly difficulty between the first swing arm and the first support member can be reduced. The second direction is the thickness direction of the first support member, and the third direction is the width direction of the first support member.

[0015] In a possible implementation manner of the first aspect, the first swing arm includes a rotating part and a main body part, the rotating part is connected to the base, and the rotating part is located on the side of the main body part close to the base; the first sliding member and the second sliding member are both arranged on the main body part. A specific structure of the first swing arm is provided.

[0016] In a possible implementation manner of the first aspect, at least a part of the first sliding member is located on the side of the second sliding member away from the rotating part in the arrangement direction of the rotating part and the main body part. In this way, the area with thinner thickness of the first support member can be more dispersed, the structural strength of the first support member can be improved, and deformation of the first support member can be avoided, so that the support performance of the first support member can be ensured, and the flatness of the folding screen in the unfolded state can be improved.

[0017] In a possible implementation manner of the first aspect, the first sliding piece comprises a first end surface and a second end surface opposite to each other, the first end surface faces away from the first support piece, and the first end surface is in sliding fit with the first fit surface; in a direction from the main body portion to the rotating portion, the distance between the first end surface and the second end surface gradually decreases. In this way, when the rotating shaft mechanism is in the folded state, in the direction from the main body portion to the rotating portion, the superimposed thickness of the first support piece, the first sliding piece and the first fit piece gradually decreases, thereby facilitating the increase of the thickness of the first portion in the first support piece, ensuring the structural strength of the first support piece, thereby ensuring the supporting performance of the first support piece, and improving the flatness of the foldable screen in the unfolded state.

[0018] In a possible implementation manner of the first aspect, the main body portion comprises a first surface facing the first support piece, the first swing arm is provided with a first avoiding hole, and the first avoiding hole comprises an open port on the first surface; the first sliding piece is located in the first avoiding hole; the first sliding piece comprises a first end surface facing away from the first support piece, and the first end surface is in sliding fit with the first fit surface.

[0019] In this way, during the switching of the rotating shaft mechanism between the unfolded state and the folded state, the first fit piece can be accommodated in the first avoiding hole, and the first fit piece can be avoided through the first avoiding hole, thereby avoiding the interference between the first fit piece and the first swing arm during the folding process of the rotating shaft mechanism, reducing the superimposed thickness of the first swing arm and the first fit piece, facilitating the further reduction of the thickness of the rotating shaft mechanism, and realizing the thin design of the rotating shaft mechanism. In addition, the height of the first sliding piece protruding from the first surface can be reduced while the first end surface is suspended, thereby reducing the superimposed thickness of the first swing arm and the first sliding piece.

[0020] In a possible implementation manner of the first aspect, the first avoiding hole comprises a first inner wall surface and a second inner wall surface opposite to each other in the first direction, the second inner wall surface comprises a first region and a second region, the second region is located on a side of the first region close to the rotating portion, and the second region is recessed relative to the first region in a direction away from the first inner wall surface to form a connecting surface between the second region and the first region; the first sliding piece is located between the first inner wall surface and the second region, and the second sliding piece is fixedly connected to the connecting surface.

[0021] In this way, the first avoiding hole can be used for avoiding the second matching piece in the process of switching the rotating shaft mechanism between the unfolded state and the folded state, the interference between the second matching piece and the first swing arm in the folding process of the rotating shaft mechanism can be avoided, the superimposed thickness of the first swing arm and the second matching piece is reduced, the thickness of the rotating shaft mechanism is further reduced, and the thin and light design of the rotating shaft mechanism is realized. In addition, in the scheme, only the local part (i.e., the second region) of the second inner wall surface is recessed in the direction away from the first inner wall surface, the opening size of the first avoiding hole is reduced, and the overall structural strength of the first swing arm is improved.

[0022] In a possible implementation manner of the first aspect, the first swing arm further includes a transition part connected between the rotating part and the main body part; the first support part includes a first bottom surface facing the first swing arm, and an auxiliary support part protruding from the first bottom surface is arranged on the first support part; and a normal projection of the auxiliary support part on the first bottom surface and a normal projection of the transition part on the first bottom surface overlap when the rotating shaft mechanism is in the unfolded state. In this way, when the first support part shakes in the rotating process, the rotation of the first support part can be guided by the cooperation between the auxiliary support part and the transition part on the first swing arm, the first support part is prevented from being stuck, and the rotating smoothness and stability of the rotating shaft mechanism are improved.

[0023] In a possible implementation manner of the first aspect, the first support part includes a first bottom surface facing the first swing arm, and the first sliding part is clamped between the first bottom surface and the first matching surface when the rotating shaft mechanism is in the folded state. In this way, the first sliding part can be limited by the first bottom surface and the first matching surface when the rotating shaft mechanism is in the folded state, the folding position of the first swing arm and the first support part can be limited, the position accuracy and the position stability of the first support part in the folding position are improved, and the folding mode of the folding screen is ensured.

[0024] In a possible implementation manner of the first aspect, an end surface of the first sliding part facing the rotating part is formed as a convex arc surface. In this way, the contact area between the first sliding part and the first matching surface is increased, the clamping reliability of the first sliding part by the first matching surface and the first bottom surface is improved, the position stability of the first sliding part is improved, and the position stability of the first support part in the folding position is ensured.

[0025] In a possible implementation manner of the first aspect, a surface of the second matching piece away from the first support part is provided with a first positioning groove, and the second sliding part cooperates with the first positioning groove when the rotating shaft mechanism is in the unfolded state. In this way, the unfolded position of the first swing arm and the first support part can be positioned by the first positioning groove, the stability of the first swing arm and the first support part in the unfolded position is improved, the supporting performance of the rotating shaft mechanism is improved, and the flatness of the folding screen in the unfolded state is improved.

[0026] In a possible implementation manner of the first aspect, the first support member comprises a first bottom surface facing the first swing arm, and the second matching member protrudes from the first bottom surface; a surface of the second matching member facing away from the first support member or the first bottom surface is provided with a second positioning groove, and the second sliding member is matched with the second positioning groove when the rotating shaft mechanism is in the folded state. In this way, the folding position of the first swing arm can be positioned through the second positioning groove, which is beneficial to improving the stability of the first swing arm and the first support member in the folding position.

[0027] In a possible implementation manner of the first aspect, the rotating shaft mechanism further comprises a first rotating shaft, the first rotating shaft is fixedly connected to one of the base and the first swing arm, and the first swing arm is rotatably connected to the base through the first rotating shaft. A rotating connection structure between the first swing arm and the base is provided.

[0028] In a possible implementation manner of the first aspect, the rotating shaft mechanism further comprises a first connecting member, the first support member and the first swing arm are movably connected to the first connecting member; the first connecting member comprises third and fourth surfaces facing away from each other, the third surface faces the first support member, the first support member is provided with a second avoiding hole, the second avoiding hole comprises an open hole on the third surface and an open hole on the fourth surface, and the second avoiding hole is used for avoiding the first matching member and the second matching member. In this way, the superimposed thickness of the first support member, the first matching member, the second matching member and the first connecting member can be reduced, and thus the thickness of the rotating shaft mechanism can be reduced, and the thin and light design of the rotating shaft mechanism can be realized.

[0029] In a possible implementation manner of the first aspect, the first swing arm is slidably connected to the first connecting member, and the second swing arm is rotatably connected to the first connecting member. That is, when the rotating shaft mechanism is switched between the unfolded state and the folded state, the first swing arm slides relative to the first connecting member, and the second swing arm rotates relative to the first connecting member. A connection mode of the first swing arm, the second swing arm and the first connecting member is provided.

[0030] In a possible implementation manner of the first aspect, the first connecting member comprises third and fourth inner end surfaces facing away from each other, and the third inner end surface is located on a side of the third outer end surface close to the base when the rotating shaft mechanism is in the unfolded state; an inner wall surface of the second avoiding hole is spaced apart from the third inner end surface to form a first connecting beam between the second avoiding hole and the third inner end surface. In this way, the opening size of the second avoiding hole can be reduced, so that the cross-sectional area of the region of the first connecting member provided with the second avoiding hole is increased without increasing the width of the first connecting member, the space of the first housing occupied by the first connecting member is avoided, and thus the structural strength of the first connecting member can be improved while reducing the width of the rotating shaft mechanism.

[0031] In a possible implementation manner of the first aspect, the inner wall surface of the second avoiding hole is a closed loop. A specific shape of the second avoiding hole is provided.

[0032] In a possible implementation manner of the first aspect, the first connecting piece is provided with a reinforcing rib, the reinforcing rib surrounds an outer periphery of the second avoiding hole and protrudes from the third surface. In this way, the structural strength of the first connecting piece can be further improved.

[0033] In a possible implementation manner of the first aspect, the first swing arm includes a second surface facing away from the first support piece, the second surface is provided with an avoiding groove recessed towards the first support piece, and the reinforcing rib is accommodated in the avoiding groove. In this way, the structural strength of the first connecting piece can be ensured, and the superimposed thickness of the first swing arm and the first support piece can be reduced, so that the thickness of the rotating shaft mechanism can be further reduced.

[0034] In a possible implementation manner of the first aspect, the rotating shaft mechanism further includes a second swing arm rotatably connected to the base, and the second swing arm and the first swing arm are arranged in the first direction; one of the second swing arm and the first support piece is provided with a first limiting hole, and the other is provided with a first limiting protrusion, the first limiting protrusion and the first limiting hole are in sliding fit; the first limiting hole includes a first limiting surface, and when the rotating shaft mechanism is in the unfolded state, the first limiting surface is used for abutting fit with the first limiting protrusion to limit the first support piece from continuing to rotate towards the folding position away from the first support piece.

[0035] In this way, the unfolded position of the first support piece can be limited through the fit of the first limiting surface and the first limiting protrusion, the position accuracy and the position stability of the first support piece in the unfolded position can be improved, and the supporting effect of the first support piece on the folding screen can be ensured.

[0036] In a possible implementation manner of the first aspect, the first limiting hole includes a second limiting surface, and when the rotating shaft mechanism is in the folded state, the second limiting surface is used for abutting fit with the first limiting protrusion to limit the first support piece from continuing to rotate towards the unfolded position away from the first support piece. In this way, the folded position of the first support piece can be limited through the fit of the second limiting surface and the first limiting protrusion, the position accuracy and the position stability of the first support piece in the folded position can be improved, and the folding form of the folding screen can be ensured.

[0037] In a possible implementation manner of the first aspect, the first limiting hole includes a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are opposite in the extension path of the first limiting hole.

[0038] In a possible implementation manner of the first aspect, the second fitting part is provided with a stop beam, the stop beam protrudes from the first fitting surface. When the rotating shaft mechanism is in the unfolded state, the stop beam abuts against the second sliding part. In this way, the unfolded position of the first swing arm and the first support part can be limited through the cooperation between the stop beam and the second sliding part.

[0039] In a possible implementation manner of the first aspect, the first inner end of the first fitting part is spaced apart from the first bottom surface to define a first opening between the first bottom surface and the first fitting surface. In this way, when assembled, the first sliding part can also be squeezed into the space between the first bottom surface and the first fitting surface from the first opening, which is beneficial to reduce the assembly difficulty between the first support part and the first swing arm.

[0040] In a possible implementation manner of the first aspect, the rotating shaft mechanism comprises a hinged assembly, the hinged assembly comprises a first hinged part and a second hinged part, the first hinged part is arranged on the second swing arm, the second hinged part is arranged on the base, one of the first hinged part and the second hinged part is a circular arc-shaped protrusion, and the other is a circular arc-shaped slot, the circular arc-shaped protrusion is slidably and rotatably fitted in the circular arc-shaped slot. A structure for rotatably connecting the second swing arm and the base is provided.

[0041] In a possible implementation manner of the first aspect, the rotating shaft mechanism comprises a second support part and a third swing arm, the second support part and the first support part are respectively arranged on two sides of the base. The third swing arm is provided with a third sliding part and a fourth sliding part, and the first support part is provided with a third fitting part and a fourth fitting part. The third sliding part cooperates with the third fitting part, and the fourth sliding part cooperates with the fourth fitting part.

[0042] In a second aspect, the present application provides a rotating shaft mechanism, comprising: a base; a first swing arm and a first support, the first swing arm is rotatably connected to the base and can rotate relative to the base about a first axis to switch the rotating shaft mechanism between an unfolded state and a folded state, the first axis extends along a first direction; the first swing arm comprises a rotating part and a main body part, the rotating part is connected to the base, and the rotating part is located on a side of the main body part close to the base; the main body part is provided with a first sliding part and a second sliding part, the first sliding part and the second sliding part are spaced apart in the first direction, and at least a part of the first sliding part is located on a side of the second sliding part away from the rotating part in the arrangement direction of the rotating part and the main body part; the first support can rotate relative to the base between an unfolded position and a folded position, the first support is provided with a first matching part and a second matching part, when the rotating shaft mechanism is switched between the unfolded state and the folded state, the first sliding part can be in sliding cooperation with the first matching part, and the second sliding part can be in sliding cooperation with the second matching part; when the rotating shaft mechanism is in the folded state, the first sliding part cooperates with the first matching part to limit the rotation of the first support in a direction away from the unfolded position of the first support, and when the rotating shaft mechanism is in the unfolded state, the second sliding part cooperates with the second matching part to limit the rotation of the first support in a direction away from the folded position of the first support.

[0043] In the rotating shaft mechanism, the first sliding part and the second sliding part are staggered in the arrangement direction of the rotating part and the main body part, and the position difference between the first sliding part and the second sliding part in the unfolded position and the folded position is used to limit the unfolded position of the first support by the cooperation between the second sliding part closer to the base and the second matching part when the rotating shaft mechanism is in the unfolded state, so that the blocking structure on the side of the first sliding part away from the base and used to limit the first sliding part can be omitted or thinned. At the same time, the folded position of the first support is limited by the cooperation between the first sliding part farther away from the base and the first matching part when the rotating shaft mechanism is in the folded state, so that the structure used to limit the second sliding part can be omitted or thinned, thereby facilitating the reduction of the overall width of the first matching part and the second matching part, and further facilitating the reduction of the width of the rotating shaft mechanism, and realizing the narrow design of the rotating shaft mechanism.

[0044] In a possible implementation manner of the second aspect, the first sliding part and the second sliding part are staggered in the thickness direction of the main body part. The arrangement manner of the first sliding part and the second sliding part is further limited.

[0045] In a possible implementation manner of the second aspect, the main body part comprises a first surface and a second surface opposite to each other in the thickness direction of the main body part, the first surface faces the first support, and at least a portion of the second sliding part is located on a side of the first sliding part away from the second surface in the thickness direction of the main body part. In this way, the second sliding part can be closer to the first support relative to the first sliding part in the unfolded state and the folded state of the hinge mechanism, and in this case, the folding position of the first support is limited by cooperation of the first sliding part farther away from the first support and the first cooperating part, without considering the thickness of the second portion of the first support facing the second sliding part in the second direction in the folded state of the hinge mechanism, thereby facilitating reduction of the superimposed thickness of the second cooperating part and the first support, so that the width of the hinge mechanism can be reduced without increasing the thickness of the hinge mechanism, and the hinge mechanism can be designed to be narrow.

[0046] In a possible implementation manner of the second aspect, the first cooperating part is provided with a first sliding groove, and the first sliding groove comprises a first opening, and the first opening is located at an end of the first sliding groove close to the base. The first sliding part is in interference fit with the first opening in the folded state of the hinge mechanism. In this way, the first sliding part can be limited by cooperation of the first opening and the first sliding part. In addition, the first sliding part can also be squeezed into the first sliding groove from the first opening during assembly, thereby facilitating reduction of assembly difficulty.

[0047] In a possible implementation manner of the second aspect, the first cooperating part is provided with a first sliding groove, and the first sliding groove comprises a second opening, and the second opening is located at an end of the first sliding groove away from the base. The first sliding part is in cooperation with the second opening in the unfolded state of the hinge mechanism. In this way, the blocking structure provided on the side of the first sliding part away from the base and used for limiting the first sliding part is omitted, the width of the first cooperating part can be further reduced, thereby facilitating reduction of the width of the hinge mechanism and realizing narrow design of the hinge mechanism.

[0048] In a possible implementation manner of the second aspect, the first sliding groove comprises a first groove wall surface, the first groove wall surface faces the first support, and the first sliding part is in sliding cooperation with the first groove wall surface when the hinge mechanism is switched between the unfolded state and the folded state. In this way, the movement stability of the first support during switching of the hinge mechanism between the unfolded state and the folded state can be improved.

[0049] In a possible implementation manner of the second aspect, the second fitting member is provided with a second sliding groove, and the second sliding groove comprises a third limiting surface, the third limiting surface is located at one end of the second sliding groove away from the base, and the second sliding member abuts against the third limiting surface when the rotating shaft mechanism is in the unfolded state. In this way, the unfolded position of the first swing arm and the first support member can be limited through cooperation between the second sliding member and the third limiting surface. Moreover, the stop beam defined between the third limiting surface and the second side wall surface of the second fitting member is also conducive to improving the overall structural strength of the first fitting member, thereby improving the cooperation reliability of the second fitting member and the second sliding groove, and further improving the stability of the first support member in the unfolded position.

[0050] In a possible implementation manner of the second aspect, the second sliding groove further comprises a third opening, and the third opening and the third limiting surface are respectively located at two ends of the extension path of the second sliding groove. The second sliding member cooperates with the third opening when the rotating shaft mechanism is in the folded state. In this way, the first sliding member and the second sliding member can respectively extrude into the first sliding groove and the second sliding groove from the first opening and the third opening, and the assembly difficulty of the first swing arm and the first support member can be reduced.

[0051] In a possible implementation manner of the second aspect, the second sliding groove penetrates through the surface of the second fitting member away from the first support member. In this way, it is conducive to increasing the thickness of the second fitting member, so as to increase the distance between the second fitting member and the first support surface when the rotating shaft mechanism is in the folded state while ensuring the sliding cooperation path length of the second sliding member and the second fitting member, without the need to set the third avoiding hole on the first support member, and the thickness of the second part of the first support member that is directly opposite to the second sliding member in the second direction can be ensured, thereby reducing the width of the rotating shaft mechanism while improving the structural strength of the first support member, and further improving the supporting performance of the first support member.

[0052] In a possible implementation manner of the second aspect, the second sliding groove comprises a third groove wall surface away from the first support member, and the second sliding member is in sliding cooperation with the third groove wall surface when the rotating shaft mechanism is switched between the unfolded state and the folded state. In this way, the movement stability of the first support member in the process of switching the rotating shaft mechanism between the unfolded state and the folded state can be improved.

[0053] In a possible implementation manner of the second aspect, the second sliding groove comprises a fourth groove wall surface opposite to the third groove wall surface, and the second sliding member is in sliding cooperation with the third groove wall surface in the process of switching the rotating shaft mechanism between the unfolded state and the folded state. In this way, the movement stability of the first support member in the process of switching the rotating shaft mechanism between the unfolded state and the folded state can be further improved.

[0054] In a possible implementation manner of the second aspect, the first support member includes a first support surface and a first bottom surface opposite to each other, the first swing arm is located on a side of the first bottom surface of the first support member, the first support member is provided with a third avoiding hole, the third avoiding hole includes an open hole on the first bottom surface, and at least a part of the second sliding member is accommodated in the third avoiding hole when the rotation shaft mechanism is in the folded state. In this way, the superimposed thickness of the first support member and the second cooperating member can be further reduced, and thus the thickness of the rotation shaft mechanism can be reduced, and the thin and light design of the rotation shaft mechanism can be realized.

[0055] In a possible implementation manner of the second aspect, the second sliding member is in sliding cooperation with the inner wall surface of the third avoiding hole in a partial stroke of the rotation shaft mechanism switching between the unfolded state and the folded state. In this way, the length of the sliding cooperation path of the second sliding member and the second sliding groove can be increased while realizing the thin and light design of the rotation shaft mechanism, and thus the cooperation reliability of the second sliding member and the second sliding groove can be ensured.

[0056] In a possible implementation manner of the third aspect, the foldable electronic device includes a foldable screen, the foldable screen includes a first display part, a second display part, and a third display part, and the third display part is connected between the first display part and the second display part. The first display part is supported on the first housing, the second display part is supported on the second housing, and the third display part is supported on the rotation shaft mechanism.

[0057] In a possible implementation manner of the third aspect, the foldable electronic device includes a foldable screen, the foldable screen includes a first display part, a second display part, and a third display part, and the third display part is connected between the first display part and the second display part. The first display part is supported on the first housing, the second display part is supported on the second housing, and the third display part is supported on the rotation shaft mechanism.

[0058] The technical effects brought by the design manners in the third aspect can be referred to the technical effects brought by the design manners in the first aspect and the second aspect, which will not be described herein. SUMMARY

[0059] FIG. 1 is a perspective view of a foldable electronic device in an unfolded state according to some embodiments of the present application;

[0060] FIG. 2 is a partially exploded structural schematic view of the foldable electronic device shown in FIG. 1;

[0061] FIG. 3 is a structural schematic view of the foldable electronic device shown in FIG. 1 in a folded state;

[0062] FIG. 4 is a structural schematic view of a rotation shaft mechanism according to some embodiments of the present application;

[0063] FIG. 5 is an exploded view of the rotation shaft mechanism shown in FIG. 4;

[0064] FIG. 6 is an assembly view of a first support, a second support, a base, and a folding screen according to some embodiments of the present application;

[0065] FIG. 7 is another assembly view of a first support, a second support, a base, and a folding screen according to some embodiments of the present application;

[0066] FIG. 8 is a cross-sectional view of a hinge mechanism in an unfolded state according to the related art;

[0067] FIG. 9 is a cross-sectional view of the hinge mechanism of FIG. 8 in a folded state;

[0068] FIG. 10 is a partial perspective view of the hinge mechanism of FIG. 4 with a first connecting member hidden;

[0069] FIG. 11 is an enlarged view of a region A of the hinge mechanism of FIG. 10;

[0070] FIG. 12a is a cross-sectional view of the hinge mechanism of FIG. 4 at a line B-B;

[0071] FIG. 12b is a cross-sectional view of the hinge mechanism of FIG. 12a in a folded state;

[0072] FIG. 13a is a cross-sectional view of the hinge mechanism of FIG. 4 at a line C-C;

[0073] FIG. 13b is a cross-sectional view of the hinge mechanism of FIG. 13a in a folded state;

[0074] FIG. 14 is a perspective view of a first support of the hinge mechanism of FIG. 10;

[0075] FIG. 15 is a schematic view of a movement trajectory of a first sliding member relative to a first mating member when switching between an unfolded state and a folded state of the hinge mechanism of FIG. 4;

[0076] FIG. 16 is a perspective view of the first support of the hinge mechanism of FIG. 10 from another perspective;

[0077] FIG. 17a is a perspective view of a first swing arm of the hinge mechanism of FIG. 4;

[0078] FIG. 17b is a perspective view of the first swing arm of FIG. 17a from another perspective;

[0079] FIG. 18 is a perspective view of a first connecting member of the hinge mechanism of FIG. 4;

[0080] FIG. 19 is a perspective view of the first swing arm of the hinge mechanism of FIG. 4 from yet another perspective;

[0081] FIG. 20 is an assembly cross-sectional view of the first swing arm of FIG. 19 and the first connecting member of FIG. 18;

[0082] Figure 21a is another cross-sectional view of the hinge mechanism shown in Figure 4 in an unfolded state;

[0083] Figure 21b is a cross-sectional view of the hinge mechanism shown in Figure 21a in a folded state;

[0084] Figure 22 is a perspective view of a second swing arm in the hinge mechanism shown in Figure 4;

[0085] Figure 23 is a schematic view of a partial stroke of the hinge mechanism shown in Figure 4 switching between an unfolded state and a folded state;

[0086] Figure 24 is a perspective view of a hinge mechanism according to further embodiments of the application;

[0087] Figure 25 is an enlarged view of region B of the hinge mechanism shown in Figure 24;

[0088] Figure 26a is a perspective view of a first swing arm in the hinge mechanism shown in Figure 24;

[0089] Figure 26b is a perspective view of the first swing arm shown in Figure 26a from another perspective;

[0090] Figure 27a is a cross-sectional view of the hinge mechanism shown in Figure 24 in an unfolded state;

[0091] Figure 27b is a cross-sectional view of the hinge mechanism shown in Figure 27a in a folded state;

[0092] Figure 28a is another cross-sectional view of the hinge mechanism shown in Figure 24 in an unfolded state;

[0093] Figure 28b is a cross-sectional view of the hinge mechanism shown in Figure 28a in a folded state;

[0094] Figure 29a is a perspective view of a first support in the hinge mechanism shown in Figure 24;

[0095] Figure 29b is a perspective view of the first support shown in Figure 29a from another perspective;

[0096] Figure 30 is a partial cross-sectional view of a hinge mechanism 23 according to yet further embodiments of the application.

[0097] : foldable electronic device 100; folding screen 10; first display part 11; second display part 12; third display part 13; first transition section 131; second transition section 132; bending section 133; housing assembly 20; first housing 21; first middle frame 211; first back cover 212; second housing 22; second middle frame 221; second back cover 222; base 230; shaft cover 2301; bottom plate 2301a; side wall plate 2301b; support plate 2302; third support surface 230a; avoidance notch 2303; first rotating assembly 231; first connecting piece 2311; third surface 2311a; fourth surface 2311b; third inner end surface 2311c; third outer end surface 2311d; reinforcing convex rib 2311e; second avoidance hole K2; first connecting beam H1; second connecting beam H2; first swing arm 2312; rotating part 2312a; main body part 2312b; first surface m1; second surface m2; transition part 2312c; first avoidance hole K1; first inner wall surface K11; second inner wall surface K12; first region K12a; second region K12b; connecting surface K13; connecting part 2312d; second swing arm 2313; second rotating assembly 232; second connecting piece 2321; third swing arm 2322; fourth swing arm 2323; first support piece 233; first support surface 2331; first bottom surface 2332; connecting rib 2333; first fixing surface 2333a; second fixing surface 2333b; first protruding block 2334; auxiliary support part 2335; fixing rib 2336; third avoidance hole K3; second support piece 234; second support surface 2341; first sliding piece 2351; first end surface 2351a; second end surface 2351b; second sliding piece 2352; third end surface 2352a; first matching piece 2361; first matching surface 2361a; second matching piece 2362; second matching surface 2362a; third sliding piece 2353; fourth sliding piece 2354; third matching piece 2363; fourth matching piece 2364; first rotating shaft 2371; hinged assembly 2372; first hinged part 2372a; second hinged part 2372b; pin shaft 23a; sliding block 23b; arc-shaped sliding groove 23c; first positioning groove C1; second positioning groove C2; avoidance groove C3; first sliding groove C4; first opening C41; second opening C42; first groove wall surface C43; second groove wall surface C44; second sliding groove C5; third groove wall surface C51; fourth groove wall surface C52; third limiting surface C53; third opening C54; first mounting port P1; first limiting assembly 238; first limiting protrusion 2381; first limiting hole 2382; first limiting surface 2382a; second limiting surface 2382b; second limiting assembly 239; second limiting protrusion 2391; second limiting hole 2392. DETAILED DESCRIPTION

[0098] In the description of the present embodiments, it should be noted that, unless specifically defined and limited otherwise, the terms "installation", "connection", "coupling" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" refers to the relative position relationship between the two connected parts is unchanged. "Rotary connection" refers to the relative rotation of two parts. "Sliding connection" refers to the relative sliding of two parts. "Transmission connection" refers to the relative position relationship between the two connected parts, one part of which can be transmitted to the other part. The connection between the two parts includes at least one of the following connection modes: rotary connection, sliding connection, gear meshing transmission connection, chain wheel transmission connection, cam mechanism transmission connection, etc.

[0099] In the embodiments of the present application, the terms "exemplary" or "for example" are used to indicate an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present the relevant concept in a specific manner.

[0100] In the embodiments of the present application, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included one or more of the features.

[0101] In the description of the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0102] In the embodiments of the present application, the orientation terms such as "upper", "lower", "transverse", "longitudinal", "horizontal" and "vertical" can include but not limited to the relative position of the components shown in the figure, it should be understood that these directional terms can be relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the position of the components shown in the figure.

[0103] In the description of the embodiments of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" refers to the relative position relationship between the two connected parts is unchanged. "Rotary connection" refers to the relative rotation of two parts. "Sliding connection" refers to the relative sliding of two parts. "Transmission connection" refers to the relative position relationship between the two connected parts, one part of which can be transmitted to the other part. The connection between the two parts includes at least one of the following connection modes: rotary connection, sliding connection, gear meshing transmission connection, chain wheel transmission connection, cam mechanism transmission connection, etc.

[0104] In the description of the embodiments of the present application, the terms "coplanar", "collinear", "perpendicular", "parallel" include the stated cases and the approximately similar cases within the acceptable deviation range. For example, "coplanar" includes absolute coplanar and approximate coplanar, and the acceptable deviation range of approximate coplanar can be a step difference of not more than 0.5mm, 1mm or 2mm relative to the absolute coplanar, or an angular deviation of within 5°, 10° or 15° relative to the absolute coplanar. "Collinear" includes absolute collinear and approximate collinear, and the acceptable deviation range of approximate collinear can be a spacing deviation of not more than 0.5mm, 1mm or 2mm relative to the absolute collinear, or an angular deviation of within 5°, 10° or 15° relative to the absolute collinear. "Parallel" includes absolute parallel and approximate parallel, and "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate collinear, approximate parallel and approximate perpendicular can be a deviation of within 5°, 10° or 15°, for example.

[0105] The embodiments of the present application provide a foldable electronic device, which can include various electronic devices with a folding screen and capable of changing the unfolding or folding mode of the folding screen and itself. The foldable electronic device has at least two states, i.e., an unfolded state and a folded state. In some cases, the foldable electronic device can further include a third state, i.e., an intermediate state between the unfolded state and the folded state. It can be understood that the intermediate state can be any one or more states of the foldable electronic device between the unfolded state and the folded state. Under different use requirements, the foldable electronic device can be switched to different states.

[0106] A rotating shaft mechanism is usually provided in the foldable electronic device to realize the relative rotation of the first housing and the second housing in the foldable electronic device. In order to reduce the size of the rotating shaft mechanism and overcome the bottleneck of thinning and / or narrowing the rotating shaft mechanism, the embodiments of the present application improve the sliding fitting structure between the first swing arm and the first support from the following two ideas.

[0107] Idea one: by improving the structure of the first fitting part and the second fitting part provided on the first support, the first fitting surface for cooperating with the first sliding part on the first swing arm is arranged on the surface of the first fitting part facing the first support, and / or the second fitting surface for cooperating with the second sliding part on the first swing arm is arranged on the surface of the second fitting part facing away from the first support, so as to reduce the superimposed thickness of the first fitting part, the second fitting part and the first support, and realize the thinning of the rotating shaft mechanism.

[0108] Secondly, the first sliding member and the second sliding member are arranged on the first swing arm, and the first sliding member and the second sliding member are arranged in a staggered manner along the arrangement direction of the swing part and the main body part of the first swing arm. The movement track of the first sliding member relative to the first matching member and the movement track of the second sliding member relative to the second matching member are staggered. The second sliding member closer to the base is used to limit the unfolded position of the first supporting member, and the first sliding member farther away from the base is used to limit the folded position of the first supporting member. Therefore, the blocking structure arranged on the side of the first sliding member away from the base and used to limit the first sliding member can be omitted or thinned, and the structure used to limit the second sliding member can be omitted or thinned, so that the rotation shaft mechanism can be narrowed.

[0109] The foldable electronic device provided by the embodiments of the present application can be a portable electronic device or other suitable electronic device. For example, the foldable electronic device can be a mobile phone, a tablet computer, a notebook computer, an electronic book reader, a camera, a wearable device, a household electronic device, etc. The wearable device includes, but is not limited to, a smart bracelet, a smart watch, a smart head-mounted display, smart glasses, etc. For ease of understanding, the foldable electronic device is taken as a folding mobile phone in the embodiments of the present application, but this cannot be understood as a limitation on the present application.

[0110] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a perspective view of a foldable electronic device 100 in an unfolded state according to some embodiments of the present application, and FIG. 2 is a partially exploded structural schematic view of the foldable electronic device 100 shown in FIG. 1. In the present embodiment, the foldable electronic device 100 is approximately rectangular in the unfolded state. It can be understood that in other embodiments, the shape of the foldable electronic device 100 in the unfolded state can also be square, circular, elliptical, etc.

[0111] The foldable electronic device 100 includes a folding screen 10 and a housing assembly 20.

[0112] The folding screen 10 is used to display images, videos, etc. Please refer to FIG. 1 and FIG. 2, the folding screen 10 includes a first display part 11, a second display part 12 and a third display part 13. The third display part 13 is connected between the first display part 11 and the second display part 12. At least the third display part 13 of the folding screen 10 is a flexible screen structure. In this way, the third display part 13 can be bent and deformed under the action of an external force, so that the folding screen 10 is folded from the unfolded state shown in FIG. 1 to a folded state. The first display part 11 and the second display part 12 of the folding screen 10 can be a flexible screen structure, a hard screen structure, or a part flexible screen structure and a part hard screen structure, which is not limited here.

[0113] In FIG. 1 and FIG. 2, the first display part 11, the second display part 12 and the third display part 13 are schematically divided by a dashed line, which does not actually exist in the foldable screen 10. The same understanding can be made for the dashed lines on other components in the following description, which will not be repeated hereinafter.

[0114] For the convenience of the description of the embodiments hereinafter, an XYZ coordinate system is established for the foldable electronic device 100 in the unfolded state, and the arrangement direction of the first display part 11, the third display part 13 and the second display part 12 is defined as the X-axis direction, the thickness direction of the foldable electronic device 100 is defined as the Z-axis direction, and the direction perpendicular to the X-axis and the Z-axis is defined as the Y-axis direction. It can be understood that the coordinate system of the foldable electronic device 100 can be flexibly set according to actual needs, which is not specifically limited here.

[0115] Referring to FIG. 3, FIG. 3 is a structural schematic diagram of the foldable electronic device 100 in the folded state, and the foldable screen 10 in the foldable electronic device 100 is also in the folded state. Specifically, when the foldable screen 10 is in the folded state, the first display part 11 and the second display part 12 of the foldable screen 10 are approximately parallel and opposite, and the third display part 13 is bent. In this state, the size of the foldable electronic device 100 is small, which is convenient for carrying. Among them, the first display part 11 and the second display part 12 opposite means that the display surface of the first display part 11 faces the display surface of the second display part 12.

[0116] When the foldable electronic device 100 is in the folded state, referring to FIG. 3, the housing assembly 20 is protected outside the foldable screen 10, and the foldable screen 10 is invisible to the user. That is, the foldable electronic device 100 is an inner folding electronic device.

[0117] In this state, still referring to FIG. 3, the third display part 13 can be folded into a water drop shape. Specifically, the third display part 13 includes a first transition section 131, a second transition section 132 and a bending section 133. The first transition section 131 is connected between the bending section 133 and the first display part 11. The second transition section 132 is connected between the bending section 133 and the second display part 12. The distance between the end of the first transition section 131 connected to the first display part 11 and the end of the second transition section 132 connected to the second display part 12 is a first distance d1, and the distance between the end of the first transition section 131 connected to the bending section 133 and the end of the second transition section 132 connected to the bending section 133 is a second distance d2, and the second distance d2 is greater than the first distance d1.

[0118] In this way, the bending radius of the third display portion 13 can be larger, the third display portion 13 can bend more naturally when the foldable screen 10 is folded, which is beneficial to reduce the folding creases of the foldable screen 10 and reduce the wear of the foldable screen 10, and the foldable screen 10 is more durable.

[0119] It can be understood that when the foldable electronic device 100 is in the folded state, the third display portion 13 can also be folded into other shapes according to actual needs, and the embodiments of the present application do not limit this.

[0120] The shell assembly 20 is used to carry the foldable screen 10. Referring to FIG. 2, the shell assembly 20 includes a first shell 21, a second shell 22, and a hinge mechanism 23. The first shell 21 can be used to carry the first display portion 11 of the foldable screen 10. The second shell 22 can be used to carry the second display portion 12 of the foldable screen 10. The hinge mechanism 23 is connected between the first shell 21 and the second shell 22, and can be used to carry the third display portion 13 of the foldable screen 10.

[0121] In this embodiment, the shell assembly 20 includes two shells, the first shell 21 and the second shell 22, and the shell assembly 20 can be folded once. It can be understood that in other embodiments, the shell assembly 20 can also include three, four or more shells. That is, in addition to including the first shell 21 and the second shell 22 described above, the shell assembly 20 can also include at least one third shell. In this case, the first shell 21, the second shell 22, and the at least one third shell can be connected in sequence, and the hinge mechanism 23 can be connected between the two adjacent shells. In this way, the shell assembly 20 can be folded multiple times (two times or more).

[0122] Referring to FIG. 2, the first shell 21 can include a first middle frame 211 and a first back cover 212, and the first display portion 11 of the foldable screen 10 is carried on the first middle frame 211. The first back cover 212 is fixedly connected to a side of the first middle frame 211 away from the first display portion 11, and the first back cover 212 can be replaced by a display screen. The first shell 21 can be connected to the hinge mechanism 23 by means of the first middle frame 211 or the first back cover 212.

[0123] The second shell 22 can include a second middle frame 221 and a second back cover 222, and the second display portion 12 of the foldable screen 10 is carried on the second middle frame 221. The second back cover 222 is fixedly connected to a side of the second middle frame 221 away from the second display portion 12, and the second back cover 222 can be replaced by a display screen. The second shell 22 can be connected to the hinge mechanism 23 by means of the second middle frame 221 or the second back cover 222.

[0124] The first housing 21 and the second housing 22 can be relatively rotated by the rotation shaft mechanism 23. Specifically, the rotation shaft mechanism 23 can be switched between an unfolded state and a folded state, thereby allowing the entire foldable electronic device 100 to be switched between the unfolded state and the folded state.

[0125] Referring to FIG. 2, when the rotation shaft mechanism 23 is in the unfolded state, the housing assembly 20 and the foldable electronic device 100 including the housing assembly 20 are also in the unfolded state, and the included angle between the first housing 21 and the second housing 22 is substantially 180°, and the included angle between the first display part 11 and the second display part 12 of the folding screen 10 is also substantially 180°. Referring to FIG. 3, when the rotation shaft mechanism 23 is in the folded state, the housing assembly 20 including the rotation shaft mechanism 23 and the foldable electronic device 100 including the housing assembly 20 are also in the folded state, and the included angle between the first housing 21 and the second housing 22 is substantially 0°, and the included angle between the first display part 11 and the second display part 12 of the folding screen 10 is also substantially 0°.

[0126] Referring to FIGS. 4-5, FIG. 4 is a structural schematic diagram of the rotation shaft mechanism 23 provided by some embodiments of the present application, and FIG. 5 is an exploded view of the rotation shaft mechanism 23 shown in FIG. 4. The rotation shaft mechanism 23 includes a base 230, a first rotating assembly 231, and a second rotating assembly 232. It can be understood that FIGS. 4 and 5 only schematically show some components included in the rotation shaft mechanism 23, and the actual shape, actual size, actual position, and actual structure of these components are not limited by FIGS. 4 and 5.

[0127] The base 230 can provide a mounting basis for structures such as the first rotating assembly 231 and the second rotating assembly 232. The length direction of the base 230 can be parallel to the Y-axis direction, the width direction can be parallel to the X-axis direction, and the thickness direction can be parallel to the Z-axis direction. The base 230 can be a structural whole or can be assembled by multiple parts. The material of the base 230 includes but is not limited to metal and plastic.

[0128] In some embodiments, referring to FIG. 5, the base 230 includes a shaft cover 2301 and a support plate 2302. The support plate 2302 is generally plate-shaped, and the shaft cover 2301 is arranged on one side of the support plate 2302. Referring to FIG. 5, the shaft cover 2301 includes a bottom plate 2301a and a side wall plate 2301b. The side wall plate 2301b surrounds the outer edge of the bottom plate 2301a, and the space between the side wall plate 2301b and the bottom plate 2301a defines a containing space in which some components of the rotation shaft mechanism 23 can be contained. In this way, some components of the rotation shaft mechanism 23 can be hidden inside the shaft cover 2301, which can improve the appearance aesthetics of the foldable electronic device 100.

[0129] The first rotating assembly 231 and the second rotating assembly 232 are respectively located at two sides of the base 230 in the width direction (for example, the X-axis direction in FIG. 4). The number of the first rotating assembly 231 can be one or more. When the number of the first rotating assembly 231 is more than one, the plurality of first rotating assemblies 231 can be arranged along the Y-axis direction. Similarly, the number of the second rotating assembly 232 can also be one or more. It should be noted that "more than one" in the embodiments of the present application refers to two or more than two.

[0130] Referring to FIGS. 4-5, the first rotating assembly 231 includes a first connecting piece 2311, a first swing arm 2312 and a second swing arm 2313, and the second rotating assembly 232 includes a second connecting piece 2321, a third swing arm 2322 and a fourth swing arm 2323.

[0131] The first connecting piece 2311 is used to fix the first rotating assembly 231 to the first housing 21. Specifically, the first connecting piece 2311 can be fixed to the first middle frame 211. For example, the first connecting piece 2311 and the first middle frame 211 can be fixed by fasteners, welding, adhesion or the like, wherein the fasteners include but are not limited to screws, pins, bolts or the like. Alternatively, the first connecting piece 2311 and the first middle frame 211 can be an integral structure. That is, the first connecting piece 2311 and the first middle frame 211 can be integrally formed.

[0132] Referring to FIG. 4, the first swing arm 2312 is connected to the base 230 and can rotate relative to the base 230 about a first axis O. The first axis O is parallel to the first direction e1. For example, the first direction e1 is parallel to the Y-axis. In order to realize the rotating connection between the first swing arm 2312 and the base 230, referring to FIG. 5, the rotating shaft mechanism 23 further includes a first rotating shaft 2371, and the central axis of the first rotating shaft 2371 is parallel to the first direction e1. The first swing arm 2312 is rotatably connected to the base 230 by means of the first rotating shaft 2371.

[0133] In some embodiments, the first rotating shaft 2371 is fixedly connected to the first swing arm 2312, and the base 230 is provided with a shaft hole for cooperating with the first rotating shaft 2371, and the first rotating shaft 2371 is rotatably matched with the shaft hole. In this way, the first swing arm 2312 can be rotatably connected to the base 230 by means of the first rotating shaft 2371. It can be understood that in another embodiment, the first rotating shaft 2371 can also be fixedly connected to the base 230, and at this time, a shaft hole for rotatably cooperating with the first rotating shaft 2371 can be provided on the first swing arm 2312. In this way, the first swing arm 2312 can also be rotatably connected to the base 230 by means of the first rotating shaft 2371.

[0134] The second swing arm 2313 is arranged in the first direction e1 (for example, the Y-axis direction in FIG. 5) and is spaced apart from the first swing arm 2312. The second swing arm 2313 is connected to the base 230 and can rotate relative to the base 230 about a second axis, wherein the second axis is parallel to the first axis. The second swing arm 2313 and the first swing arm 2312 can be in transmission connection. Specifically, when the first swing arm 2312 rotates relative to the base 230, the second swing arm 2313 can be driven to rotate relative to the base 230.

[0135] In order to realize the rotational connection between the second swing arm 2313 and the base 230, please refer to FIG. 5, the rotating shaft mechanism 23 further comprises a hinged assembly 2372, which comprises a first hinged part 2372a and a second hinged part 2372b. The first hinged part 2372a is arranged on the second swing arm 2313, and the second hinged part 2372b is arranged on the base 230.

[0136] In the embodiment shown in FIG. 5, the first hinged part 2372a is a circular arc-shaped protrusion, and the second hinged part 2372b is a circular arc-shaped groove, and the circular arc-shaped protrusion is slidably and rotatably matched in the circular arc-shaped groove. The center line of the circular arc-shaped groove is the second axis. It can be understood that in other embodiments, the first hinged part 2372a can be a circular arc-shaped groove, and the second hinged part 2372b can be a circular arc-shaped protrusion.

[0137] In this embodiment, the first swing arm 2312 is in sliding connection with the first connecting piece 2311, and the second swing arm 2313 is in rotational connection with the first connecting piece 2311 through a rotating shaft or the like structure. It can be understood that in other embodiments, the first swing arm 2312 can be in sliding connection with the first connecting piece 2311, and the second swing arm 2313 can be in rotational connection with the first connecting piece 2311 through a rotating shaft or the like structure. In this case, the first swing arm 2312 and the base 230 can be in rotational connection through the hinged assembly 2372, and the second swing arm 2313 can be in rotational connection with the base 230 through the first rotating shaft 2371.

[0138] The second connecting member 2321 is used to fix the second rotating assembly 232 to the second shell 22. The third swing arm 2322 is rotatably connected to the base 230, and the fourth swing arm 2323 is rotatably connected to the base 230. The connection between the second connecting member 2321 and the second shell 22 can be designed according to the connection between the first connecting member 2311 and the first shell 21. The connection between the third swing arm 2322 and the base 230 and the connection between the third swing arm 2322 and the second connecting member 2321 can be designed according to the connection between the first swing arm 2312 and the base 230 and the connection between the first swing arm 2312 and the first connecting member 2311, respectively. The connection between the fourth swing arm 2323 and the second connecting member 2321 and the connection between the fourth swing arm 2323 and the base 230 can be designed according to the connection between the second swing arm 2313 and the first connecting member 2311 and the connection between the second swing arm 2313 and the base 230, respectively. Details are not described herein.

[0139] In some embodiments, in order to improve the flatness of the folding screen 10 in the unfolded state and limit the shape of the folding screen 10 in the folded state, please refer to FIGS. 4-5, the rotating shaft mechanism 23 further comprises a first support member 233 and a second support member 234. The first support member 233 and the second support member 234 are respectively located on opposite sides of the base 230, and the first support member 233 and the second support member 234 can rotate relative to the base 230 between an unfolded position and a folded position.

[0140] The first swing arm 2312, the second swing arm 2313, and the first connecting member 2311 are movably connected to the first support member 233. The third swing arm 2322, the fourth swing arm 2323, and the second connecting member 2321 are movably connected to the second support member 234.

[0141] The first support member 233 and the second support member 234 can both be substantially long strip-shaped plates. Specifically, the length direction of the first support member 233 and the length direction of the second support member 234 are parallel to the Y-axis direction.

[0142] When the rotating shaft mechanism 23 is in the unfolded state, the first support member 233, the second support member 234, and the base 230 can be used to support a part of the folding screen 10, respectively. Please refer to FIGS. 4-5, the first support member 233 comprises a first support surface 2331, the second support member 234 comprises a second support surface 2341, and the base 230 comprises a third support surface 230a. Specifically, the surface of the support plate 2302 away from the shaft cover 2301 can be formed as the third support surface 230a.

[0143] Please refer to FIG. 6, which is an assembly diagram of the first support 233, the second support 234, the base 230 and the folding screen 10 according to some embodiments of the present application. In FIG. 6, the first support 233 and the second support 234 are both in the unfolded position, and the hinge mechanism 23 is in the unfolded state. The first support 233 can carry the first transition section 131 of the third display portion 13 by means of the first support surface 2331, the second support 234 can carry the second transition section 132 of the third display portion 13 by means of the second support surface 2341, and the base 230 can carry the bending section 133 of the third display portion 13 by means of the third support surface 230a.

[0144] When the hinge mechanism 23 is in the unfolded state, please refer to FIG. 6, the first support surface 2331, the second support surface 2341 and the third support surface 230a are all oriented in the same direction and are coplanar, that is, the included angle between the first support surface 2331 and the third support surface 230a is substantially 180°, and the included angle between the second support surface 2341 and the third support surface 230a is also substantially 180°. In this way, when the hinge mechanism 23 is in the unfolded state, the first support 233, the second support 234 and the base 230 can jointly carry the third display portion 13 of the folding screen 10. Thus, the flatness of the third display portion 13 can be ensured when the folding screen 10 is in the unfolded state.

[0145] Please refer to FIG. 7, which is another assembly diagram of the first support 233, the second support 234, the base 230 and the folding screen 10 according to some embodiments of the present application. In FIG. 7, the first support 233 and the second support 234 are both in the folded position, and the hinge mechanism 23 is in the folded state. In this state, the first support surface 2331 faces the second support surface 2341, and the first support surface 2331 and the second support surface 2341 are inclined or perpendicular to the third support surface 230a. In this way, when the hinge mechanism 23 is in the folded state, a space for accommodating the third display portion 13 can be defined between the first support 233, the second support 234 and the base 230, so as to limit the shape of the third display portion 13 in the folded state.

[0146] In some embodiments, please refer to FIG. 7, the first support 233 and the second support 234 are rotated relative to the base 230 by angles θ1 and θ2 respectively when they are rotated from the unfolded position to the folded position, and both θ1 and θ2 are greater than 90°. In this way, the third display portion 13 can be folded into a water drop shape. In other embodiments, the rotation angles θ1 and θ2 can also be less than or equal to 90°, so as to fold the third display portion 13 into other shapes, which are not limited in the embodiments of the present application.

[0147] As the folding radius of the folding screen 10 is smaller than the folding radius of the hinge mechanism 23 when the foldable electronic device 100 is in the folded state, in order to avoid the third display part 13 of the folding screen 10 from being damaged by the extrusion of the base 230 in the folded state or during folding, referring to FIG. 6 and in combination with FIG. 7, when the hinge mechanism 23 is folded from the unfolded state to the folded state, the first support 233 and the second support 234 move away from the base 230 while rotating relative to the base 230; when the hinge mechanism 23 is folded from the folded state to the unfolded state, the first support 233 and the second support 234 move towards the base 230 while rotating relative to the base 230.

[0148] In this way, the hinge mechanism 23 can adapt to the shape change of the third display part 13 during folding or unfolding, avoid the extrusion of the base 230 to the third display part 13, and effectively reduce the stress on the third display part 13 in the folding process and in the folded state, thereby improving the reliability of the folding screen 10.

[0149] In order to constrain the shape of the folding screen 10 during the switching process between the unfolded state and the folded state (i.e., the shape of the folding screen 10 in the process state), as well as the shape of the folding screen 10 in the unfolded state and the folded state (i.e., the shape of the folding screen 10 in the stable state), the first support 233 and the second support 234 need to move according to a specific trajectory.

[0150] The hinge mechanism 23 in the related art usually uses the following two ways to constrain the movement trajectory of the first support 233 and the second support 234. The first way is to additionally increase a set of third swing arms in the hinge mechanism 23 to constrain the movement trajectory of the first support 233 and the second support 234. However, the third swing arms occupy a large internal space of the hinge mechanism 23, which is not conducive to reducing the volume of the hinge mechanism 23, and thus is not conducive to making the hinge mechanism 23 thin and narrow. Moreover, due to the space layout in the hinge mechanism 23, the space for adjusting the movement trajectory of the first support 233 and the second support 234 is limited, which affects the movement stability of the first support 233 and the second support 234.

[0151] The second mode is to add a sliding fit structure (also referred to as a higher pair constraint) between the first support 233 and the first swing arm 2312 to control the movement trajectory of the first support 233. A sliding fit structure is added between the second support 234 and the third swing arm 2322 to control the movement trajectory of the second support 234. The sliding fit structure between the first support 233 and the first swing arm 2312 can be the same as the sliding fit structure between the second support 234 and the third swing arm 2322. Here, the sliding fit structure between the first support 233 and the first swing arm 2312 is exemplarily described.

[0152] Referring to FIGS. 8-9, FIG. 8 is a cross-sectional view of the hinge mechanism 23 in the unfolded state in the related art, and FIG. 9 is a cross-sectional view of the hinge mechanism 23 in the folded state shown in FIG. 8. The hinge mechanism 23 includes a pin shaft 23a and a sliding block 23b. The pin shaft 23a is arranged on the first swing arm 2312, and the sliding block 23b is arranged on the side surface of the first support 233 away from the first support surface 2331. The sliding block 23b is provided with an arc-shaped sliding groove 23c, and the pin shaft 23a and the arc-shaped sliding groove 23c are slidably and rotatably fitted. The arc-shaped sliding groove 23c and the pin shaft 23a constitute the sliding fit structure between the first support 233 and the first swing arm 2312.

[0153] In this way, during the switching of the hinge mechanism 23 between the unfolded state and the folded state, the movement trajectory of the first support 233 can be limited by the cooperation of the pin shaft 23a and the wall surface of the arc-shaped sliding groove 23c, so that the first support 233 can move according to the predetermined trajectory. In addition, when the hinge mechanism 23 is in the unfolded state and the folded state, the unfolded position and the folded position of the first support 233 can also be limited by the cooperation of the pin shaft 23a and the wall surface of the arc-shaped sliding groove 23c, thereby improving the accuracy and stability of the unfolded position and the folded position of the first support 233.

[0154] In some embodiments, the pin shaft 23a and the arc-shaped sliding groove 23c are one. In other embodiments, the pin shaft 23a and the arc-shaped sliding groove 23c can also be two respectively. In this case, the two pin shafts 23a can be arranged in the Y-axis direction and can be symmetrically arranged. Exemplarily, the two arc-shaped sliding grooves 23c can be arranged on the sliding block 23b, and the shapes of the two arc-shaped sliding grooves 23c are the same.

[0155] In this embodiment, in order to ensure the reliability of the cooperation between the pin shaft 23a and the arc-shaped sliding groove 23c, the slider 23b needs to have a certain thickness and a certain width, so as to ensure the wall thickness of the other part of the slider 23b except the arc-shaped sliding groove 23c. In this way, the structural strength of the slider 23b can be ensured, and the arc-shaped sliding groove 23c can be prevented from being deformed due to the extrusion of the pin shaft 23a, so that the arc-shaped sliding groove 23c can better constrain the pin shaft 23a.

[0156] In this embodiment, the "thickness t1 of the slider 23b" refers to the maximum size of the slider 23b protruding from the first support 233 in the thickness direction of the first support 233, that is, the size of the slider 23b in the Z-axis direction when the rotating shaft mechanism 23 is in the unfolded state. The "width w1 of the slider 23b" refers to the maximum size between the end face of the slider 23b close to the base 230 and the end face of the slider 23b away from the base 230, that is, the size of the slider 23b in the X-axis direction when the rotating shaft mechanism 23 is in the unfolded state.

[0157] With the increasing demand for thinness, lightness and long battery life of the foldable electronic device 100, the demand for reducing the volume of the rotating shaft mechanism 23 is becoming more and more urgent. However, the volume of the slider 23b in the related art is large, which becomes a bottleneck for the thinning and narrowing of the rotating shaft mechanism 23, so that the rotating shaft mechanism 23 cannot be further thinned and narrowed.

[0158] In order to reduce the volume of the rotating shaft mechanism 23, please refer to FIGS. 10-11. FIG. 10 is a partial perspective view of the rotating shaft mechanism 23 in FIG. 4 hidden from the first connecting piece 2311, wherein the rotating shaft mechanism 23 in FIG. 10 is in an intermediate state. FIG. 11 is an enlarged view of region A of the rotating shaft mechanism 23 in FIG. 10.

[0159] The first swing arm 2312 is provided with a first sliding piece 2351 and a second sliding piece 2352, and the first sliding piece 2351 and the second sliding piece 2352 are arranged in the first direction e1. Specifically, the first sliding piece 2351 and the second sliding piece 2352 can be spaced apart or connected together in the first direction e1.

[0160] The first sliding piece 2351 and the second sliding piece 2352 are fixed to the first swing arm 2312. For example, the first sliding piece 2351 and the first swing arm 2312 can be an integral structure, or the first sliding piece 2351 and the first swing arm 2312 can be fixed by welding, bonding or the like. The connection between the second sliding piece 2352 and the first swing arm 2312 can be designed by referring to the connection between the first sliding piece 2351 and the first swing arm 2312, which will not be described in detail here.

[0161] Please refer to FIG. 10-FIG. 11, the first support piece 233 comprises a first bottom surface 2332, the first bottom surface 2332 is opposite to the first support surface 2331 in the second direction e2. Wherein, the second direction e2 can be the thickness direction of the first support piece 233. When the rotating shaft mechanism 23 is in the unfolded state, the second direction e2 is parallel to the Z-axis direction. The first swing arm 2312 and the second swing arm 2313 are both located on the side of the first bottom surface 2332.

[0162] Please refer to FIG. 11, the first support piece 233 is provided with a first matching piece 2361 and a second matching piece 2362. Specifically, the first matching piece 2361 and the second matching piece 2362 can be arranged on the first bottom surface 2332. The first matching piece 2361 and the second matching piece 2362 are arranged in the first direction e1. The first matching piece 2361 and the first support piece 233 can be an integral structure. Alternatively, the first matching piece 2361 and the first support piece 233 can be fixed by welding, bonding or the like. The connection mode between the second matching piece 2362 and the first support piece 233 can be designed by referring to the connection mode between the first matching piece 2361 and the first support piece 233, which will not be described in detail here.

[0163] Please continue to refer to FIG. 11, the first matching piece 2361 comprises a first matching surface 2361a, at least a part of the first matching surface 2361a is located on the surface of the first matching piece 2361 facing the first support piece 233. That is, the outer surface of the first matching piece 2361 is formed as at least part of the first matching surface 2361a. Wherein, the outer surface of the first matching piece 2361 refers to the surface of the first matching piece 2361 facing away from its center of mass.

[0164] Specifically, one part of the first matching surface 2361a is located on the surface of the first matching piece 2361 facing the first support piece 233, or the entire first matching surface 2361a is located on the surface of the first matching piece 2361 facing the first support piece 233.

[0165] The second matching piece 2362 comprises a second matching surface 2362a, at least a part of the second matching surface 2362a is located on the surface of the second matching piece 2362 facing away from the first support piece 233. That is, one part of the second matching surface 2362a is located on the surface of the second matching piece 2362 facing away from the first support piece 233, or the entire second matching surface 2362a is located on the surface of the second matching piece 2362 facing away from the first support piece 233.

[0166] Specifically, the first matching surface 2361a and the second matching surface 2362a are opposite to each other, and the first matching surface 2361a faces the first support piece 233, and the second matching surface 2362a faces away from the first support piece 233.

[0167] Referring to FIGS. 12a-12b and FIGS. 13a-13b, FIG. 12a is a sectional view of the hinge mechanism 23 shown in FIG. 4 at line B-B, and FIG. 12b is a sectional view of the hinge mechanism 23 shown in FIG. 12a in a folded state. FIG. 13a is a sectional view of the hinge mechanism 23 shown in FIG. 4 at line C-C, and FIG. 13b is a sectional view of the hinge mechanism 23 shown in FIG. 13a in a folded state.

[0168] When the hinge mechanism 23 is switched between the unfolded state and the folded state, the first sliding member 2351 is in sliding cooperation with the first cooperation surface 2361a, and the second sliding member 2352 is in sliding cooperation with the second cooperation surface 2362a. In this regard, in order to improve the sliding smoothness of the first sliding member 2351, the first cooperation surface 2361a can be an arc surface. Similarly, in order to improve the sliding smoothness of the second sliding member 2352, the second cooperation surface 2362a can be an arc surface.

[0169] Referring to FIGS. 12a and 12b, the first sliding member 2351 is located at a side of the first cooperation member 2361 close to the first support member 233, and a first accommodation groove can be defined between the first cooperation surface 2361a of the first cooperation member 2361 and the first bottom surface 2332 of the first support member 233. The first sliding member 2351 is located in the first accommodation groove. Referring to FIGS. 13a and 13b, the second sliding member 2352 is located at a side of the second cooperation member 2362 away from the first support member 233.

[0170] Since the first cooperation surface 2361a and the second cooperation surface 2362a are opposite to each other and arranged in the first direction e1, the first cooperation surface 2361a and the second cooperation surface 2362a can form a virtual sliding groove. For example, the first cooperation surface 2361a forms a bottom wall surface of the virtual sliding groove, and the second cooperation surface 2362a forms a top wall surface of the virtual sliding groove. The first sliding member 2351 and the second sliding member 2352 can be cooperated with the virtual sliding groove and can slide along the virtual sliding groove during unfolding or folding of the hinge mechanism 23.

[0171] In this way, on one hand, by arranging at least part of the first matching surface 2361a on the surface of the first matching element 2361 facing the first support element 233, the first matching element 2361 can be arranged on the side of the first sliding element 2351 away from the first support element 233 as a whole, without the need to arrange a top wall surface on the first matching element 2361 for matching with the first sliding element 2351, which can reduce the thickness of the first matching element 2361 while ensuring the reliable matching between the first sliding element 2351 and the first matching element 2361, thereby facilitating the reduction of the thickness of the rotating shaft mechanism 23 and the lightweight design of the rotating shaft mechanism 23. By arranging at least part of the second matching surface 2362a on the surface of the second matching element 2362 away from the first support element 233, the second matching element 2362 can be arranged on the side of the first sliding element 2351 facing the first support element 233 as a whole, without the need to arrange a bottom wall surface on the second matching element 2362 for matching with the second sliding element 2352, which can reduce the thickness of the second matching element 2362 while ensuring the reliable matching between the second sliding element 2352 and the second matching element 2362, thereby facilitating the reduction of the thickness of the rotating shaft mechanism 23 and the lightweight design of the rotating shaft mechanism 23.

[0172] On the other hand, since the first matching surface 2361a and the second matching surface 2362a are staggered in the first direction e1, the maximum dimension of the first sliding element 2351 in the second direction e2 (i.e., the thickness of the first sliding element 2351) and the maximum dimension of the second sliding element 2352 in the second direction e2 (i.e., the thickness of the second sliding element 2352) are not constrained by the interval of the first matching surface 2361a and the second matching surface 2362a in the second direction e2, so that the interval of the first matching surface 2361a and the second matching surface 2362a in the second direction e2 can be designed to be smaller, which facilitates the increase of the thickness of the first matching element 2361 and the thickness of the second matching element 2362, thereby being capable of improving the structural strength of the first matching element 2361 and the structural strength of the first matching element 2361 while reducing the thickness of the rotating shaft mechanism 23 and achieving the lightweight design of the rotating shaft mechanism 23.

[0173] In addition, in the process of switching the rotating shaft mechanism 23 between the unfolded state and the folded state, the transmission connection between the first swing arm 2312 and the first support element 233 is achieved by the contact matching between the first sliding element 2351 and the first matching surface 2361a and the contact matching between the second sliding element 2352 and the second matching surface 2362a, and the sliding contact area between the first swing arm 2312 and the first support element 233 is small, which facilitates the reduction of the frictional resistance and can avoid the occurrence of jamming, sticking and other situations during the folding process of the rotating shaft mechanism 23, thereby facilitating the smoothness of the folding process of the rotating shaft mechanism 23 and improving the folding feeling of the foldable electronic device 100.

[0174] Therefore, the rotating shaft mechanism 23 in the embodiments of the present application can reduce the thickness of the rotating shaft mechanism 23 while ensuring the reliable cooperation between the first sliding member 2351 and the first cooperating member 2361 and the reliable cooperation between the second sliding member 2352 and the second cooperating member 2362, and achieve the lightweight design of the rotating shaft mechanism 23 and the foldable electronic device 100, thereby overcoming the bottleneck of further reducing the thickness of the rotating shaft mechanism 23.

[0175] In some embodiments, during at least part of the stroke of the rotating shaft mechanism 23 switching between the unfolded state and the folded state, the orthogonal projection of the first sliding member 2351 on the first reference plane overlaps with the orthogonal projection of the second cooperating member 2362 on the first reference plane. The first reference plane is perpendicular to the first direction e1. The at least part of the stroke of the rotating shaft mechanism 23 switching between the unfolded state and the folded state includes both the entire stroke and the partial stroke of the rotating shaft mechanism 23 switching between the unfolded state and the folded state.

[0176] Specifically, referring to FIG. 11, in the first direction e1, at least part of the first sliding member 2351 is opposite to the second cooperating member 2362. That is, part of the first sliding member 2351 is opposite to the second cooperating member 2362 in the first direction e1, or the entire first sliding member 2351 is opposite to the second cooperating member 2362 in the first direction e1.

[0177] In this way, it is beneficial to reduce the distance between the first cooperating surface 2361a and the first bottom surface 2332, and at the same time, it is beneficial to increase the distance between the second cooperating surface 2362a and the first bottom surface 2332, so as to reduce the superimposed size of the first cooperating member 2361, the first sliding member 2351 and the first supporting member 233 in the second direction e2 while ensuring the thickness of the first cooperating member 2361 and the thickness of the second cooperating member 2362, thereby achieving the lightweight design of the rotating shaft mechanism 23.

[0178] In some embodiments, during at least part of the stroke of the rotating shaft mechanism 23 switching between the unfolded state and the folded state, the orthogonal projection of the second sliding member 2352 on the first reference plane overlaps with the orthogonal projection of the first cooperating member 2361 on the first reference plane. Referring to FIG. 11, in the first direction e1, at least part of the second sliding member 2352 is opposite to the first cooperating member 2361. Specifically, part of the second sliding member 2352 is opposite to the first cooperating member 2361 in the first direction e1, or the entire second sliding member 2352 is opposite to the first cooperating member 2361 in the first direction e1.

[0179] In this way, the distance between the second matching surface 2362a and the first matching surface 2361a in the second direction e2 is reduced, so that the thickness of the first matching member 2361 and the thickness of the second matching member 2362 can be ensured, and the superimposed size of the first supporting member 233, the second matching member 2362 and the second sliding member 2352 in the second direction e2 is reduced, so that the thin and light design of the rotating shaft mechanism 23 can be realized.

[0180] Referring to FIG. 14, which is a perspective view of the first supporting member 233 in the rotating shaft mechanism 23 shown in FIG. 10, the first matching member 2361 includes a first inner end D1 and a first outer end D2 opposite to each other in the extending path of the first matching member 2361. The first inner end D1 is located on the side of the first outer end D2 close to the base 230. For example, the first matching member 2361 can be generally arc-shaped and block-shaped.

[0181] In some embodiments, referring to FIG. 14, the first matching surface 2361a can extend in a direction away from the first supporting member 233 in the direction from the first inner end D1 to the first outer end D2. The first matching surface 2361a can be formed as an arc-shaped surface arched in a direction away from the first supporting member 233.

[0182] In this way, the distance between the first outer end D2 and the first bottom surface 2332 is increased, the size of the first matching surface 2361a in the second direction e2 is increased, so that the path length of the sliding cooperation between the first sliding member 2351 and the first matching surface 2361a in the second direction e2 is increased, and the displacement S11 of the first sliding member 2351 in the second direction e2 is also increased.

[0183] Referring to FIG. 15, which is a schematic view of the movement trajectory S1 of the first sliding member 2351 relative to the first matching member 2361 when the rotating shaft mechanism 23 shown in FIG. 4 is switched between the unfolded state and the folded state, in order to facilitate the description of the movement trajectory S1 of the first sliding member 2351 relative to the first matching member 2361, the movement trajectory S1 is represented by the movement trajectory of the centroid Q of the first sliding member 2351.

[0184] The length of the movement track S1 of the first sliding piece 2351 relative to the first matching piece 2361 is related to the displacement S11 of the first sliding piece 2351 relative to the first matching piece 2351 in the second direction e2 and the displacement S12 of the first sliding piece 2351 relative to the first matching piece 2351 in the third direction e3 during the switching of the rotating shaft mechanism 23 between the unfolded state and the folded state. Moreover, the displacement S11 of the first sliding piece 2351 in the second direction e2 and the displacement S12 of the first sliding piece 2351 in the third direction e3 are negatively related when the movement track S1 of the first sliding piece 2351 relative to the first matching piece 2351 is constant. That is, the greater the displacement S11, the smaller the displacement S12, and the smaller the displacement S11, the greater the displacement S12.

[0185] Therefore, the increase of the displacement S11 of the first sliding piece 2351 in the second direction e2 can reduce the displacement S12 of the first sliding piece 2351 in the third direction e3, so as to reduce the size of the first matching surface 2361a in the third direction e3 while ensuring a longer sliding matching path between the first sliding piece 2351 and the first matching surface 2361a, and further reduce the width of the first matching piece 2361, which is conducive to reducing the width of the rotating shaft mechanism 23 in the unfolded state, and further increasing the volume of the battery, the circuit board assembly and other components without changing the width of the foldable electronic device 100 in the unfolded state, and is conducive to improving the endurance of the foldable electronic device 100.

[0186] It should be noted that the size of the first matching surface 2361a in the second direction e2 refers to the interval between the opposite ends of the extension path of the first matching surface 2361a in the second direction e2, and the size of the first matching surface 2361a in the third direction e3 refers to the interval between the opposite ends of the extension path of the first matching surface 2361a in the third direction e3.

[0187] On this basis, referring to FIG. 14, the first inner end D1 of the first matching piece 2361 can be fixedly connected to the first bottom surface 2332. In this case, the first outer end D2 can be spaced apart from the first bottom surface 2332 to define a first mounting port P1 between the first outer end and the first bottom surface 2332. In this way, the size of the first matching surface 2361a in the second direction e2 can be further increased, and the size of the first matching surface 2361a in the third direction e3 can be further reduced, so as to further reduce the width of the first matching piece 2361 and achieve the narrow design of the rotating shaft mechanism 23. Meanwhile, the first sliding piece 2351 can be assembled between the first bottom surface 2332 and the first matching surface 2361a through the first mounting port P1, which can reduce the assembly difficulty between the first swing arm 2312 and the first support piece 233.

[0188] In some embodiments, the first matching member 2361 and the first supporting member 233 are in an integral structure. That is, the first matching member 2361 and the first supporting member 233 are integrally formed. In this way, the connection strength between the first matching member 2361 and the first supporting member 233 can be improved, and the processing technology can be simplified, and the manufacturing cost can be reduced. In other embodiments, the first matching member 2361 and the first supporting member 233 can also be independently formed. In this case, the first matching member 2361 and the first supporting member 233 can be connected by welding, bonding, clamping, fasteners, etc.

[0189] In some embodiments, referring to FIG. 16, which is a perspective view of the first supporting member 233 in the rotating shaft mechanism 23 shown in FIG. 10 from another perspective, the first supporting member 233 is provided with a connecting rib 2333. The connecting rib 2333 is fixedly connected to the first bottom surface 2332. The connecting rib 2333 is generally plate-shaped. For example, the connecting rib 2333 can be perpendicular to the first supporting surface 2331. The connecting rib 2333 includes a first fixed surface 2333a and a second fixed surface 2333b opposite to each other in the first direction e1. The first matching member 2361 is fixedly connected to the first fixed surface 2333a and protrudes from the first fixed surface 2333a.

[0190] In this way, on the one hand, the first matching member 2361 and the first supporting member 233 can be connected as a whole through the connecting rib 2333, the rigidity of the first matching member 2361 can be improved, the first matching member 2361 can be prevented from being deformed under the extrusion of the first sliding member 2351, and the cooperation reliability of the first sliding member 2351 and the first matching member 2361 can be improved. On the other hand, the first sliding member 2351 can also be limited in the first direction e1 by the connecting rib 2333, which is conducive to reducing the shaking of the first swing arm 2312 during rotation.

[0191] The connection mode between the connecting rib 2333 and the first supporting member 233 and the connection mode between the first matching member 2361 and the connecting rib 2333 can be designed according to the connection mode between the first matching member 2361 and the first supporting member 233, which will not be described in detail here.

[0192] Referring to FIG. 16, the second matching member 2362 is fixedly connected to the first supporting member 233 and protrudes from the first bottom surface 2332 of the first supporting member 233. The second matching member 2362 is generally fan-shaped and block-shaped. The second matching surface 2362a can be formed as an arc-shaped surface that arches away from the first supporting member 233. In this way, the structural strength of the second matching member 2362 can be improved, and the second matching surface 2362a can be easily formed on the surface of the second matching member 2362 that faces away from the first supporting member 233.

[0193] The connection between the second fitting part 2362 and the first supporting part 233 can be designed by referring to the connection between the first fitting part 2361 and the first supporting part 233, which will not be described in detail herein.

[0194] Please continue to refer to FIG. 16. In some embodiments, the second fitting part 2362 is connected to the first fitting part 2361. Specifically, the second fitting part 2362 and the first fitting part 2361 can be connected by means of the connecting rib 2333. The second fitting part 2362 is fixedly connected to the second fixed surface 2333b. In this way, by connecting the first fitting part 2361 and the second fitting part 2362 into one whole, the structural strength of the first fitting part 2361 and the structural strength of the second fitting part 2362 are improved, and the cooperation reliability between the first sliding part 2351 and the first fitting part 2361 and the cooperation reliability between the second sliding part 2352 and the second fitting part 2362 are further improved.

[0195] It can be understood that, in other embodiments, when the rotating shaft mechanism 23 does not include the connecting rib 2333, the first fitting part 2361 can also be directly fixedly connected to the second fitting part 2362.

[0196] Please refer to FIG. 16. The connecting rib 2333 and the first fitting part 2361 both protrude from the second fitting surface 2362a, and the second fitting surface 2362a and the connecting rib 2333 define a second accommodating groove. The second sliding part 2352 can be located in the second accommodating groove. In this way, the second sliding part 2352 can be limited in the first direction e1 by the connecting rib 2333, which is conducive to further reducing the swing of the first swing arm 2312 during rotation.

[0197] In some embodiments, please refer to FIG. 17a and FIG. 17b. FIG. 17a is a perspective view of the first swing arm 2312 in the rotating shaft mechanism 23 shown in FIG. 4, and FIG. 17b is a perspective view of the first swing arm 2312 shown in FIG. 17a from another angle. The first swing arm 2312 includes a rotating part 2312a, a main body part 2312b, and a transition part 2312c. The transition part 2312c is connected between the rotating part 2312a and the main body part 2312b. The first swing arm 2312 can be rotatably connected to the base 230 by means of the rotating part 2312a.

[0198] Please refer back to FIG. 12a, when the rotation shaft mechanism 23 is in the unfolded state, the rotating part 2312a is located at the side of the main body part 2312b close to the base 230. Specifically, the base 230 is provided with an avoiding gap 2303, which can penetrate the inner surface and the outer surface of the side wall plate 2301b and the end surface of the side wall plate 2301b away from the bottom plate 2301a. When the rotation shaft mechanism 23 is in the unfolded state, the transition part 2312c is arranged in the avoiding gap 2303, and the main body part 2312b is located at the outer side of the base 230. It can be understood that in other embodiments, the first swing arm 2312 can also not include the transition part 2312c.

[0199] Please refer to FIG. 17a and FIG. 17b, the first sliding part 2351 and the second sliding part 2352 are both arranged on the main body part 2312b. In the arrangement direction of the rotating part 2312a and the main body part 2312b, at least a part of the first sliding part 2351 is located at the side of the second sliding part 2352 away from the rotating part 2312a. That is, in the arrangement direction of the rotating part 2312a and the main body part 2312b (for example, the width direction of the first swing arm 2312), the first sliding part 2351 and the second sliding part 2352 are arranged staggered.

[0200] Specifically, it can be that in the arrangement direction of the rotating part 2312a and the main body part 2312b, the first sliding part 2351 is located at the side of the second sliding part 2352 away from the rotating part 2312a as a whole, and at this time the second sliding part 2352 is located at the side of the first sliding part 2351 close to the rotating part 2312a as a whole. Or, it can also be that in the arrangement direction of the rotating part 2312a and the main body part 2312b, a part of the first sliding part 2351 is located at the side of the second sliding part 2352 away from the rotating part 2312a, and a part of the second sliding part 2352 is located at the side of the first sliding part 2351 close to the rotating part 2312a.

[0201] In order to facilitate the description of the positional relationship between the first sliding part 2351 and the second sliding part 2352 in the unfolded state and the folded state, the second sliding part 2352 is shown by a dashed line in FIG. 12a, and the first sliding part 2351 is shown by a dashed line in FIG. 13b.

[0202] The length of the movement track S1 of the first sliding member 2351 relative to the first matching member 2361 is substantially the same as the length of the movement track of the second sliding member 2352 relative to the second matching member 2362 during the switching of the rotating shaft mechanism 23 between the unfolded state and the folded state. Referring to FIG. 12a, when at least a part of the first sliding member 2351 is located on the side of the second sliding member 2352 away from the rotating part 2312a, the first sliding member 2351 is farther away from the base 230 than the second sliding member 2352 is when the rotating shaft mechanism 23 is in the unfolded state. Referring to FIG. 13b, the first sliding member 2351 is also farther away from the base 230 than the second sliding member 2352 is when the rotating shaft mechanism 23 is in the folded state.

[0203] In this way, the first part F1 of the first sliding member 2351 and the second part F2 of the second sliding member 2352 are not only staggered in the first direction e1 but also staggered in the third direction e3 when the rotating shaft mechanism 23 is in the folded state. Since the first part F1 and the second part F2 are usually thin, the stagger in the first direction e1 and the third direction e3 can further disperse the thin areas of the first support member 233, which is conducive to improving the structural strength of the first support member 233, avoiding deformation of the first support member 233, and thus ensuring the supporting performance of the first support member 233 and improving the flatness of the foldable screen 10 in the unfolded state.

[0204] The third direction e3 is perpendicular to the second direction e2 and perpendicular to the first direction e1. The third direction e3 can be the width direction of the first support member 233. The third direction e3 is parallel to the X-axis direction when the rotating shaft mechanism 23 is in the unfolded state.

[0205] In some embodiments, referring to FIGS. 17a and 17b, the main body part 2312b includes a first surface m1 and a second surface m2 opposite to each other. The first surface m1 can face the first support member 233. Specifically, the first surface m1 and the second surface m2 are opposite to each other in the thickness direction of the first swing arm 2312.

[0206] Referring to FIG. 17a, the first sliding member 2351 includes a first end surface 2351a and a second end surface 2351b opposite to each other. The first end surface 2351a faces away from the first support member 233, and the second end surface 2351b faces toward the first support member 233. The first end surface 2351a is configured to slide with the first matching surface 2361a, and the first end surface 2351a is suspended. In this way, the sliding of the first end surface 2351a with the first matching surface 2361a can be facilitated, and interference between the first swing arm 2312 and the first matching member 2361 can be avoided.

[0207] In order to improve the sliding smoothness of the first sliding member 2351, the first end surface 2351a can be a plane or an arc surface.

[0208] Referring to FIGS. 17a and 17b, the second sliding member 2352 can protrude from the first surface m1. Specifically, the second sliding member 2352 includes a third end surface 2352a facing the first support member 233, and the third end surface 2352a is configured to cooperate with the second cooperation surface 2362a. The third end surface 2352a can protrude from the first surface m1. In this way, the sliding cooperation between the second sliding member 2352 and the second cooperation surface 2362a can be facilitated.

[0209] In order to improve the sliding smoothness of the second sliding member 2352, the third end surface 2352a can be an arc surface. For example, the third end surface 2352a can be a convex arc surface that is arched towards the first support member 233. The convex arc surface can be a circular arc surface, an elliptical arc surface, or the like. In this case, the shape of the second sliding member 2352 includes, but is not limited to, a spherical shape, an ellipsoidal shape, a spherical cap shape, a cylindrical shape, a prismatic shape, or the like. It can be understood that in other embodiments, the third end surface 2352a can also be a plane, and in this case, the cross-sectional shape of the second sliding member 2352 can be a triangular shape, a rectangular shape, a trapezoidal shape, an irregular shape, or the like. Here, the cross-sectional shape of the second sliding member 2352 refers to a cross section obtained by cutting the second sliding member 2352 with a plane perpendicular to the first direction e1.

[0210] In some embodiments, referring to FIGS. 17a and 17b, the first swing arm 2312 is provided with a first avoiding hole K1. Specifically, the first avoiding hole K1 is arranged on the main body portion 2312b. The first avoiding hole K1 can include an open hole on the first surface m1 and an open hole on the second surface m2. In other words, the first avoiding hole K1 penetrates the first surface m1 and the second surface m2. That is, the first avoiding hole K1 is a through hole. It can be understood that in other embodiments, the first avoiding hole K1 can also not include an open hole on the second surface m2, in which case the first avoiding hole K1 no longer penetrates the second surface m2, and the first avoiding hole K1 is a blind hole.

[0211] The first surface m1 is provided with a connecting portion 2312d, and the first sliding member 2351 can be fixedly connected to the connecting portion 2312d. The first sliding member 2351 and the connecting portion 2312d can be an integral structure, or the first sliding member 2351 and the connecting portion 2312d can be fixed by welding, bonding, or the like.

[0212] Please refer to FIG. 17a, the connecting part 2312d is fixedly connected to the first surface m1 and located at the circumferential outside of the first avoiding hole K1, the first sliding part 2351 is fixedly connected to the end face of the connecting part 2312d close to the first avoiding hole K1 and located in the first avoiding hole K1. Specifically, the orthographic projection of the first sliding part 2351 on the first surface m1 is located in the orthographic projection of the first avoiding hole K1 on the first surface m1.

[0213] In this way, please refer to FIG. 12a and FIG. 12b, during the switching of the rotating shaft mechanism 23 between the unfolded state and the folded state, the first matching part 2361 can be accommodated in the first avoiding hole K1 and can avoid the first matching part 2361 through the first avoiding hole K1, so as to reduce the superimposed thickness of the first swing arm 2312 and the first matching part 2361 while avoiding the interference between the first swing arm 2312 and the first matching part 2361 during the folding of the rotating shaft mechanism 23, which is conducive to further reducing the thickness of the rotating shaft mechanism 23 and realizing the lightweight design of the rotating shaft mechanism 23. In addition, the height of the first sliding part 2351 protruding from the first surface m1 can be reduced while realizing the suspension of the first end face 2351a, so as to reduce the superimposed thickness of the first swing arm 2312 and the first sliding part 2351.

[0214] In some embodiments, please refer to FIG. 17a and FIG. 17b, the first avoiding hole K1 further includes an open hole on the end face of the main body part 2312b away from the rotating part 2312a, that is, the first avoiding hole K1 also penetrates the end face of the main body part 2312b away from the rotating part 2312a. In this case, the first avoiding hole K1 is formed as a notch. In this way, the interference between the first matching part 2361 and the first swing arm 2312 during the folding of the rotating shaft mechanism 23 can be further avoided.

[0215] It can be understood that in other embodiments, the first sliding part 2351 can also be fixedly connected to the inner wall surface of the first avoiding hole K1. In this case, the connecting part 2312d described above can not be arranged on the first swing arm 2312. In this way, the suspension of the first end face 2351a can also be realized. In still other embodiments, the suspension of the first end face 2351a can also be realized by arranging the first sliding part 2351 to be spaced apart from the first surface m1.

[0216] Please continue to refer to FIG. 17a and FIG. 17b, the first avoiding hole K1 includes a first inner wall surface K11 and a second inner wall surface K12 opposite to each other in the first direction e1, the second inner wall surface K12 includes a first area K12a and a second area K12b, the first area K12a is located on a side of the second area K12b close to the rotating part 2312a, and the second area K12b is recessed in a direction away from the first inner wall surface K11 relative to the first area K12a to form a connecting surface K13 between the second area K12b and the first area K12a. That is, the distance between the first area K12a and the first inner wall surface K11 is smaller than the distance between the second area K12b and the first inner wall surface K11.

[0217] The first sliding part 2351 is located between the first inner wall surface K11 and the second area K12b. Specifically, the orthographic projection of the first sliding part 2351 on the first surface m1 is located between the first inner wall surface K11 and the second area K12b, and the second sliding part 2352 is fixedly connected to the connecting surface K13. Specifically, the orthographic projection of the second sliding part 2352 on the first surface m1 is also located in the orthographic projection of the first avoiding hole K1 on the first surface m1.

[0218] In this way, please refer to FIG. 13a, during the switching process of the rotating shaft mechanism 23 between the unfolded state and the folded state, the first avoiding hole K1 can also be used to avoid the second matching part 2362, which can avoid the interference between the second matching part 2362 and the first swing arm 2312 during the folding process of the rotating shaft mechanism 23, and reduce the superimposed thickness of the first swing arm 2312 and the second matching part 2362, thereby facilitating further reducing the thickness of the rotating shaft mechanism 23, and realizing the lightweight design of the rotating shaft mechanism 23.

[0219] In addition, in the present embodiment, only part (i.e. the second area K12b) of the second inner wall surface K12 is recessed in a direction away from the first inner wall surface K11, which is conducive to reducing the opening size of the first avoiding hole K1, thereby facilitating to improve the overall structural strength of the first swing arm 2312.

[0220] In some embodiments, referring to FIG. 12b, when the hinge mechanism 23 is in the folded state, the first sliding piece 2351 is clamped between the first bottom surface 2332 and the first matching surface 2361a. For example, the end surface of the first sliding piece 2351 towards the rotating part 2312a abuts against the first matching surface 2361a, and the second end surface 2351b abuts against the first bottom surface 2332. In this way, when the hinge mechanism 23 is in the folded state, the first sliding piece 2351 can be limited by the first bottom surface 2332 and the first matching surface 2361a, so as to limit the folding position of the first swing arm 2312 and the first supporting piece 233, improve the position accuracy and position stability of the first supporting piece 233 in the folding position, and further ensure the folding mode of the folding screen 10.

[0221] On this basis, in order to increase the contact area between the first sliding piece 2351 and the first matching surface 2361a, the end surface of the first sliding piece 2351 towards the rotating part 2312a can be formed as a convex arc surface. In this way, the clamping reliability of the first matching surface 2361a and the first bottom surface 2332 to the first sliding piece 2351 can be improved, so as to improve the position stability of the first sliding piece 2351 and ensure the position stability of the first supporting piece 233 in the folding position.

[0222] Similarly, in order to increase the contact area between the first sliding piece 2351 and the first bottom surface 2332, the second end surface 2351b can be formed as a plane.

[0223] In some embodiments, referring to FIG. 17a, in the direction from the main body part 2312b to the rotating part 2312a, the distance between the first end surface 2351a and the second end surface 2351b gradually decreases. That is, in the direction from the main body part 2312b to the rotating part 2312a, the thickness of the first sliding piece 2351 gradually decreases. In this way, when the hinge mechanism 23 is in the folded state, in the direction from the main body part 2312b to the rotating part 2312a, the superimposed size of the first supporting piece 233, the first sliding piece 2351 and the first matching piece 2361 in the second direction e2 gradually decreases, so as to facilitate increasing the thickness of the first part F1 of the first supporting piece 233, ensure the structural strength of the first supporting piece 233, ensure the supporting performance of the first supporting piece 233, and improve the flatness of the folding screen 10 in the unfolded state.

[0224] On the basis of any of the above embodiments, referring to FIG. 16, a first positioning groove C1 is formed on the surface of the second matching piece 2362 away from the first supporting piece 233. The first positioning groove C1 is connected to the side of the first matching surface 2361a away from the base 230. Referring to FIG. 13a, when the hinge mechanism 23 is in the unfolded state, the second sliding piece 2352 cooperates with the first positioning groove C1.

[0225] In this way, the first swing arm 2312 and the first support 233 can be positioned at the unfolded position by the first positioning slot C1, so as to improve the stability of the first swing arm 2312 and the first support 233 at the unfolded position, thereby improving the supporting performance of the hinge mechanism 23 and the flatness of the foldable screen 10 in the unfolded state.

[0226] Further, referring to FIG. 13b, the surface of the second cooperating member 2362 away from the first support 233 is provided with a second positioning slot C2. The second positioning slot C2 is connected to the side of the first cooperating surface 2361a close to the base 230. When the hinge mechanism 23 is in the folded state, the second sliding member 2352 cooperates with the second positioning slot C2. In this way, the first swing arm 2312 can be positioned at the folded position by the second positioning slot C2, so as to improve the stability of the first swing arm 2312 and the first support 233 at the folded position.

[0227] In some embodiments, in order to improve the sliding smoothness of the first sliding member 2351, the groove wall surface of the first positioning slot C1 and the first cooperating surface 2361a are smoothly connected, and the groove wall surface of the second positioning slot C2 and the first cooperating surface 2361a are smoothly connected.

[0228] In this embodiment, the surface of the second cooperating member 2362 away from the first support 233 is provided with the first positioning slot C1 and the second positioning slot C2. It can be understood that in other embodiments, only the first positioning slot C1 can be formed on the surface of the second cooperating member 2362 away from the first support 233, in which case, the second positioning slot C2 can be provided on the first support 233, or the second positioning slot C2 can not be provided. In still other embodiments, the second positioning slot C2 can be provided on the first support 233 or the first cooperating member 2361, and the first positioning slot C1 can not be provided.

[0229] In order to limit the movement trajectory of the second support 234, in some embodiments, referring to FIGS. 12a-12b and FIGS. 13a-13b, a third sliding member 2353 and a fourth sliding member 2354 are provided on the third swing arm 2322, and a third cooperating member 2363 and a fourth cooperating member 2364 are provided on the second support 234, the third sliding member 2353 cooperates with the third cooperating member 2363, and the fourth sliding member 2354 cooperates with the fourth cooperating member 2364.

[0230] The structure of the third sliding member 2353 and the structure of the fourth sliding member 2354 can be the same as the structure of the first sliding member 2351 and the structure of the second sliding member 2352 in any of the embodiments of the present application, respectively, and the structure of the third matching member 2363 and the structure of the fourth matching member 2364 can be the same as the structure of the first matching member 2361 and the structure of the second matching member 2362 in any of the embodiments of the present application. Details are not repeated here.

[0231] On the basis of any of the above embodiments, referring to FIG. 18, which is a perspective view of the first connecting member 2311 in the hinge mechanism 23 shown in FIG. 4, the first connecting member 2311 includes a third surface 2311a and a fourth surface 2311b opposite to each other in the thickness direction of the first connecting member 2311, and the third surface 2311a faces the first support member 233. The first connecting member 2311 is provided with a second avoiding hole K2, which has an opening on the third surface 2311a and an opening on the fourth surface 2311b. That is, the second avoiding hole K2 penetrates the third surface 2311a and the fourth surface 2311b. The second avoiding hole K2 is used to avoid the first matching member 2361 and the second matching member 2362.

[0232] Specifically, referring to FIGS. 12a-13b, during the switching of the hinge mechanism 23 between the unfolded state and the folded state, a part of the first matching member 2361 and a part of the second matching member 2362 can be accommodated in the second avoiding hole K2. In this way, the superimposed thickness of the first support member 233, the first matching member 2361, the second matching member 2362 and the first connecting member 2311 can be reduced, thereby reducing the thickness of the hinge mechanism 23 and achieving the lightweight design of the hinge mechanism 23.

[0233] On this basis, in order to improve the structural strength of the first support member 233, referring to FIG. 18, the first connecting member 2311 includes a third inner end surface 2311c and a third outer end surface 2311d opposite to each other, and when the hinge mechanism 23 is in the unfolded state, the third inner end surface 2311c is located on the side of the third outer end surface 2311d close to the base 230. The second avoiding hole K2 is located between the third inner end surface 2311c and the third outer end surface 2311d, and the inner wall surface of the second avoiding hole K2 is spaced apart from the third inner end surface 2311c to define a first connecting beam H1, and the inner wall surface of the second avoiding hole K2 is spaced apart from the third outer end surface 2311d to define a second connecting beam H2. Exemplarily, the inner wall surface of the second avoiding hole K2 can be a closed loop.

[0234] In this way, the size of the second avoiding hole K2 can be reduced, and the cross-sectional area of the region of the first connecting member 2311 where the second avoiding hole K2 is arranged can be increased without increasing the width of the first connecting member 2311, so that the first connecting member 2311 does not occupy the space of the first housing 21, and the structural strength of the first connecting member 2311 can be improved while reducing the width of the rotating shaft mechanism 23.

[0235] In addition, since the superimposed thickness of the first engaging member 2361 and the first support member 233 and the superimposed thickness of the second engaging member 2362 and the first support member 233 are small, the first engaging member 2361 and the second engaging member 2362 occupy less space of the second avoiding hole K2 when the rotating shaft mechanism 23 is in the unfolded state and the folded state, and the size of the second avoiding hole K2 can be designed to be small. Therefore, even if the first connecting member 2311 is provided with the first connecting beam H1 and the second connecting beam H2, the first engaging member 2361 and the second engaging member 2362 will not interfere with the first connecting member 2311 during the switching of the rotating shaft mechanism 23 between the unfolded state and the folded state.

[0236] The cross-sectional area of the first connecting member 2311 refers to the area of the cross-section of the first connecting member 2311 obtained by cutting the first connecting member 2311 with a plane perpendicular to the first direction e1.

[0237] In some embodiments, referring to FIG. 18, the first connecting member 2311 is provided with a reinforcing rib 2311e, which surrounds the outer periphery of the second avoiding hole K2 and protrudes from the third surface 2311a. In this way, the structural strength of the first connecting member 2311 can be further improved.

[0238] Referring to FIG. 18, the reinforcing rib 2311e can be arranged around the second avoiding hole K2. For example, the reinforcing rib 2311e can be annular. It can be understood that in other embodiments, the reinforcing rib 2311e can also surround only part of the outer periphery of the second avoiding hole K2. In addition, when the first connecting member 2311 is provided with the reinforcing rib 2311e, the second avoiding hole K2 can also include an open hole on the third inner end surface 2311c, that is, the second avoiding hole K2 can also penetrate the third inner end surface 2311c, and in this case, the second avoiding hole K2 can be open-loop-shaped. In this way, the structural strength of the first connecting member 2311 can also be improved to some extent.

[0239] In some embodiments, the reinforcing rib 2311e is integrated with the first connecting piece 2311. In this way, the connection strength of the reinforcing rib 2311e and the first connecting piece 2311 can be improved, and the process is simple and convenient to process. In other embodiments, the reinforcing rib 2311e and the first connecting piece 2311 can also be connected by welding, bonding, clamping, screw connection and the like.

[0240] Further, please refer to FIGS. 19-20, FIG. 19 is a perspective view of the first swing arm 2312 in the pivot mechanism 23 shown in FIG. 4 from another angle, and FIG. 20 is an assembly sectional view of the first swing arm 2312 in FIG. 19 and the first connecting piece 2311 in FIG. 18. The second surface m2 of the first swing arm 2312 is provided with a recessed avoiding groove C3 facing the first surface m1, and the reinforcing rib 2311e is contained in the avoiding groove C3. The avoiding groove C3 can penetrate through the end surface of the main body part 2312b away from the rotating part 2312a. In this way, the structural strength of the first connecting piece 2311 can be ensured, while the superimposed thickness of the first swing arm 2312 and the first support 233 can be reduced, so that the thickness of the pivot mechanism 23 can be further reduced.

[0241] The structure of the second connecting piece 2321 and the structure of the third swing arm 2322 can be designed according to the structure of the first connecting piece 2311 and the structure of the first swing arm 2312 in any embodiment of the present application, respectively, and will not be repeated here. In addition, the second avoiding hole K2, the reinforcing rib 2311e and the avoiding groove C3 and the like in the present embodiment can be applied to the pivot mechanism 23 and the foldable electronic device 100 in any embodiment of the present application.

[0242] Please refer to FIGS. 21a-21b, FIG. 21a is another sectional view of the pivot mechanism 23 shown in FIG. 4 in an unfolded state, and FIG. 21b is a sectional view of the pivot mechanism 23 shown in FIG. 21a in a folded state. The pivot mechanism 23 further comprises a first limiting assembly 238, which comprises a first limiting protrusion 2381 and a first limiting hole 2382, and the first limiting protrusion 2381 and the first limiting hole 2382 are in sliding fit.

[0243] In some embodiments, please refer to FIGS. 21a-21b, the first limiting protrusion 2381 is arranged on the second swing arm 2313, and the first limiting hole 2382 is arranged on the first support 233. It can be understood that in other embodiments, the first limiting protrusion 2381 can also be arranged on the first support 233, and the first limiting hole 2382 can be arranged on the second swing arm 2313.

[0244] Specifically, referring to FIGS. 21a-21b, the first bottom surface 2332 of the first support member 233 is provided with a first protrusion 2334 protruding from the first bottom surface 2332. A first limiting hole 2382 can be formed in the first protrusion 2334. In some embodiments, the first limiting hole 2382 can pass through one of the side surfaces of the first protrusion 2334 opposite to each other in the first direction e1, in which case the first limiting hole 2382 is formed as a blind hole. In other embodiments, the first limiting hole 2382 can also pass through both side surfaces of the first protrusion 2334 opposite to each other in the first direction e1, in which case the first limiting hole 2382 is formed as a through hole.

[0245] To improve the connection reliability of the first protrusion 2334 and the first support member 233, the first protrusion 2334 and the first support member 233 can be of an integral structure. Of course, embodiments of the present application are not limited thereto, and in other embodiments, the first protrusion 2334 and the first support member 233 can also be connected by means of gluing, welding, clamping, screw connection, etc.

[0246] The first limiting hole 2382 can be an elongated hole. For example, the first limiting hole 2382 can be an arc-shaped hole. The first limiting hole 2382 includes a first limiting surface 2382a and a second limiting surface 2382b opposite to each other in the extension path thereof.

[0247] Referring to FIG. 22, which is a perspective view of the second swing arm 2313 in the rotating shaft mechanism 23 shown in FIG. 4. The first limiting protrusion 2381 can protrude from the side wall surface of the second swing arm 2313 in the first direction e1. In this way, the first limiting protrusion 2381 is facilitated to extend into the first limiting hole 2382 and slide with the first limiting hole 2382.

[0248] The connection mode between the first limiting protrusion 2381 and the second swing arm 2313 includes but is not limited to gluing, welding, clamping, or screw connection. In other embodiments, to improve the connection reliability of the first limiting protrusion 2381 and the second swing arm 2313, the first limiting protrusion 2381 and the second swing arm 2313 can be of an integral structure.

[0249] The cross-sectional shape of the first limiting protrusion 2381 includes but is not limited to a circle, an ellipse, a triangle, a rectangle, a square, an irregular shape, etc. Among them, the cross section of the first limiting protrusion 2381 refers to the cross section obtained by cutting the first limiting protrusion 2381 with a plane perpendicular to the first direction e1.

[0250] Please refer to FIG. 21a, when the rotation shaft mechanism 23 is in the unfolded state, that is, when the first support member 233 is in the unfolded position, the first limiting face 2382a can abut against the first limiting protrusion 2381 to limit the rotation of the first support member 233 in a direction away from the folded position of the first support member 233. Specifically, the outer circumferential surface of the first limiting protrusion 2381 can abut against the first limiting face 2382a.

[0251] In this way, the unfolded position of the first support member 233 can be limited by the cooperation between the first limiting face 2382a and the first limiting protrusion 2381, which can improve the position accuracy and stability of the first support member 233 in the unfolded position, and ensure the supporting effect of the first support member 233 on the foldable screen 10.

[0252] Please refer to FIG. 21b, when the rotation shaft mechanism 23 is in the folded state, that is, when the first support member 233 is in the folded position, the first limiting protrusion 2381 abuts against the second limiting face 2382b to limit the rotation of the first support member 233 in a direction away from the unfolded position of the first support member 233. Specifically, the outer circumferential surface of the first limiting protrusion 2381 abuts against the second limiting face 2382b. In this way, the folded position of the first support member 233 can be limited by the cooperation between the second limiting face 2382b and the first limiting protrusion 2381, which can improve the position accuracy and stability of the first support member 233 in the folded position, and further ensure the folding mode of the foldable screen 10.

[0253] In addition, the rotation of the first support member 233 during the folding of the rotation shaft mechanism 23 can also be guided by the cooperation between the first limiting protrusion 2381 and the first limiting hole 2382, which can improve the smoothness and stability of the rotation process of the first support member 233, thereby avoiding the occurrence of jamming, locking, abnormal noise and the like during the rotation process of the first support member 233, and being conducive to improving the folding feeling of the foldable electronic device 100.

[0254] In this embodiment, the first limiting hole 2382 includes the first limiting face 2382a and the second limiting face 2382b. In other embodiments, the first limiting hole 2382 can also include only one of the first limiting face 2382a and the second limiting face 2382b.

[0255] In addition, it can be understood that when the rotating shaft mechanism 23 comprises the first limiting protrusion 2381 and the first limiting hole 2382, the first fitting part 2361 can not be provided with a structure for limiting the first sliding part 2351, or the second fitting part 2362 can not be provided with a structure (such as the first positioning groove C1, the second positioning groove C2, etc.) for limiting the second sliding part 2352. In this way, the volume of the first fitting part 2361 and the volume of the second fitting part 2362 can be further reduced, thereby facilitating further reduction of the width and thickness of the rotating shaft mechanism 23, and further thinning and narrowing of the rotating shaft mechanism 23.

[0256] Further, referring to FIGS. 21a-21b, the rotating shaft mechanism 23 further comprises a second limiting assembly 239, which comprises a second limiting protrusion 2391 and a second limiting hole 2392 in sliding fit. One of the second limiting protrusion 2391 and the second limiting hole 2392 is arranged on the fourth swing arm 2323, and the other is arranged on the second support part 234. The cooperation of the second limiting protrusion 2391 and the second limiting hole 2392 can limit the unfolded position and the folded position of the second support part 234.

[0257] The structure of the second limiting protrusion 2391 and the second limiting hole 2392 can be designed by referring to the structure of the first limiting protrusion 2381 and the first limiting hole 2382 respectively, and the working principle of the second limiting assembly 239 is the same as that of the first limiting assembly 238, which will not be described here.

[0258] In some embodiments, referring back to FIG. 14, the first support part 233 is provided with an auxiliary support part 2335 protruding from the first bottom surface 2332. The surface of the auxiliary support structure away from the first support part 233 can be formed as a convex arc surface. The auxiliary support part 2335 can be connected to the first fitting part 2361 by a fixing rib 2336.

[0259] When the rotating shaft mechanism 23 is in the unfolded state, the auxiliary support part 2335 has an overlapping projection on the first support surface 2331 with the projection of the transition part 2312c on the first support surface 2331.

[0260] In this way, please refer to FIG. 23, which is a schematic diagram of the partial stroke of the rotation shaft mechanism 23 shown in FIG. 4 switching between the unfolded state and the folded state, wherein (a) of FIG. 23 is a schematic diagram of the rotation shaft mechanism 23 in the unfolded state, (b) of FIG. 23 is a schematic diagram of the first supporting member 233 in the rotation shaft mechanism 23 rotating to an intermediate state in which the included angle between the first supporting surface 2331 and the horizontal plane is 15°, (c) of FIG. 23 is a schematic diagram of the first supporting member 233 in the rotation shaft mechanism 23 rotating to an intermediate state in which the included angle between the first supporting surface 2331 and the horizontal plane is 25°, and (d) of FIG. 23 is a schematic diagram of the first supporting member 233 in the rotation shaft mechanism 23 rotating to an intermediate state in which the included angle between the first supporting surface 2331 and the horizontal plane is 45°. The "horizontal plane" is parallel to the first supporting surface 2331 of the first supporting member 233 in the unfolded position.

[0261] As shown in (a)→(d) of FIG. 23, when the rotation shaft mechanism 23 switches from the unfolded state to the folded state, in the initial rotation stage, the rotation of the first supporting member 233 can be guided by the cooperation between the auxiliary supporting part 2335 and the transition part 2312c on the first swing arm 2312; as shown in (d)→(a) of FIG. 23, when the rotation shaft mechanism 23 switches from the folded state to the unfolded state, in the stage when the rotation shaft mechanism 23 is about to switch to the unfolded state, the rotation of the first supporting member 233 can be guided by the cooperation between the auxiliary supporting part 2335 and the transition part 2312c on the first swing arm 2312. In this way, when the first supporting member 233 shakes during the rotation, the rotation of the first supporting member 233 can be guided by the cooperation between the auxiliary supporting part 2335 and the transition part 2312c on the first swing arm 2312, so as to avoid the first supporting member 233 from being stuck, and the rotation smoothness and stability of the rotation shaft mechanism 23 can be improved.

[0262] Similarly, in order to reduce the sliding of the second supporting member 234 during the rotation, the auxiliary supporting part 2335 described above can also be arranged on the second supporting member 234.

[0263] In other embodiments, please refer to FIG. 24 and FIG. 25, wherein FIG. 24 is a perspective view of a rotation shaft mechanism 23 provided in other embodiments of the present application, and FIG. 25 is an enlarged view of the B part area of the rotation shaft mechanism 23 shown in FIG. 24. Specifically, the rotation shaft mechanism 23 comprises a base 230, a first swing arm 2312, a second swing arm 2313, a first supporting member 233, and a first connecting member 2311. One of the differences between the rotation shaft mechanism 23 in the present embodiment and the rotation shaft mechanism in the embodiment shown in FIG. 4 is that the sliding cooperation structure between the first swing arm 2312 and the first supporting member 233 in the present embodiment is different.

[0264] The base 230, the first swing arm 2312, the second swing arm 2313, the first support 233 and the first connecting member 2311 in this embodiment can have substantially the same structure as the rotating shaft mechanism 23 in the embodiment shown in FIG. 4. In addition, the connection manner and relative movement relationship between the first swing arm 2312 and the base 230 and the first connecting member 2311, and the connection manner and relative movement relationship between the second swing arm 2313 and the base 230 and the first connecting member 2311 can be the same as those of the rotating shaft mechanism 23 in the embodiment shown in FIG. 4, and thus will not be described herein again.

[0265] The first swing arm 2312 is provided with a first sliding member 2351 and a second sliding member 2352. The first sliding member 2351 and the second sliding member 2352 are spaced apart in the first direction e1.

[0266] Referring to FIG. 25, the first support 233 is provided with a first matching member 2361 and a second matching member 2362, and the first matching member 2361 and the second matching member 2362 can be arranged on the first bottom surface 2332 of the first support 233. When the rotating shaft mechanism 23 is switched between the unfolded state and the folded state, the first sliding member 2351 is in sliding cooperation with the first matching member 2361, and the second sliding member 2352 is in sliding cooperation with the second matching member 2362.

[0267] In some embodiments, referring to FIGS. 26a and 26b, FIG. 26a is a perspective view of the first swing arm 2312 in the rotating shaft mechanism 23 shown in FIG. 24, and FIG. 26b is a perspective view of the first swing arm 2312 shown in FIG. 26a from another viewing angle.

[0268] The first swing arm 2312 includes a rotating portion 2312a, a main body portion 2312b and a transition portion 2312c. The transition portion 2312c is connected between the rotating portion 2312a and the main body portion 2312b. The first swing arm 2312 can be rotatably connected to the base 230 by means of the rotating portion 2312a. When the rotating shaft mechanism 23 is in the unfolded state, the rotating portion 2312a is located on the side of the main body portion 2312b close to the base 230. It can be understood that, in other embodiments, the first swing arm 2312 can also not include the transition portion 2312c.

[0269] Please refer to FIG. 26a and FIG. 26b, the first sliding member 2351 and the second sliding member 2352 are staggered in the arrangement direction of the rotating portion 2312a and the main body portion 2312b, and at least a part of the first sliding member 2351 is located on the side of the second sliding member 2352 away from the rotating portion 2312a. In this embodiment, the first sliding member 2351 is located on the side of the second sliding member 2352 away from the rotating portion 2312a as a whole. In other embodiments, a part of the first sliding member 2351 can be located on the side of the second sliding member 2352 away from the rotating portion 2312a, and a part of the second sliding member 2352 can be located on the side of the first sliding member 2351 close to the rotating portion 2312a.

[0270] Since the movement track of the first sliding member 2351 relative to the first matching member 2361 is substantially the same as the movement track of the second sliding member 2352 relative to the second matching member 2362 during the switching of the rotating shaft mechanism 23 between the unfolded state and the folded state, the movement track of the first sliding member 2351 relative to the first matching member 2361 will be staggered with the movement track of the second sliding member 2352 relative to the second matching member 2362 after the first sliding member 2351 and the second sliding member 2352 are staggered in the arrangement direction of the rotating portion 2312a and the main body portion 2312b.

[0271] Specifically, please refer to FIG. 27a and FIG. 27b, FIG. 27a is a cross-sectional view of the rotating shaft mechanism 23 in the unfolded state shown in FIG. 24, and FIG. 27b is a cross-sectional view of the rotating shaft mechanism 23 in the folded state shown in FIG. 27a. In order to facilitate the illustration of the relative position relationship between the first sliding member 2351 and the second sliding member 2352, the second sliding member 2352 is shown by a dashed line in FIG. 27a and FIG. 27b.

[0272] When the rotating shaft mechanism 23 is in the unfolded state, the first sliding member 2351 can be farther away from the base 230 relative to the second sliding member 2352, and when the rotating shaft mechanism 23 is in the folded state, the second sliding member 2352 will also be farther away from the base relative to the first sliding member 2351.

[0273] Please refer to FIG. 27a and FIG. 28a, FIG. 28a is another cross-sectional view of the rotating shaft mechanism 23 in the unfolded state shown in FIG. 24, when the rotating shaft mechanism 23 is in the folded state, the second sliding member 2352 cooperates with the second matching member 2362 to limit the rotation of the first support member 233 in the direction away from its folded position. Please refer to FIG. 27b and FIG. 28b, FIG. 28b is a cross-sectional view of the rotating shaft mechanism 23 in the folded state shown in FIG. 28a. When the rotating shaft mechanism 23 is in the folded state, the first sliding member 2351 cooperates with the first matching member 2361 to limit the rotation of the first support member 233 in the direction away from its unfolded position.

[0274] In this way, by staggering the first sliding member 2351 and the second sliding member 2352 in the arrangement direction of the rotating part 2312a and the main body part 2312b, the position difference between the first sliding member 2351 and the second sliding member 2352 in the unfolded position and the folded position can be utilized, when the rotating shaft mechanism 23 is in the unfolded state, the cooperation between the second sliding member 2352 closer to the base 230 and the second cooperating member 2362 can be utilized to limit the unfolded position of the first support member 233, and the blocking structure for limiting the first sliding member 2351 on the side away from the base 230 can be omitted or thinned.

[0275] When the rotating shaft mechanism 23 is in the folded state, the cooperation between the first sliding member 2351 farther away from the base 230 and the first cooperating member 2361 can be utilized to limit the folded position of the first support member 233, and the structure for limiting the second sliding member 2352 can be omitted or thinned, thereby facilitating the reduction of the overall width of the first cooperating member 2361 and the second cooperating member 2362, and further facilitating the reduction of the width of the rotating shaft mechanism 23, and realizing the narrow design of the rotating shaft mechanism 23.

[0276] In this way, while ensuring the stability of the unfolded position and the folded position of the first support member 233, the width of the first cooperating member 2361 and the second cooperating member 2362 can be reduced, and further the width of the rotating shaft mechanism 23 can be reduced, and the narrow design of the rotating shaft mechanism 23 can be realized.

[0277] In some embodiments, referring to FIGS. 26a and 26b, the main body part 2312b is provided with a first avoiding hole K1, which can include an open hole on the first surface m1 and an open hole on the second surface m2. That is, the first avoiding hole K1 penetrates the first surface m1 and the second surface m2 of the main body part 2312b opposite in the thickness direction, and the first surface m1 faces the first support member 233. The first sliding member 2351 and the second sliding member 2352 are respectively arranged on the first inner wall surface K11 and the second inner wall surface K12 of the first avoiding hole K1, and the orthographic projections of the first sliding member 2351 and the second sliding member 2352 on the first surface m1 are both located in the first avoiding hole K1.

[0278] The cross-sectional shape of the first sliding member 2351 includes but is not limited to a circle, an ellipse, a triangle, a rectangle, a square, an irregular shape, etc. Among them, the cross section of the first sliding member 2351 refers to the section obtained by cutting the first sliding member 2351 with a plane perpendicular to the first direction e1. The shape of the second sliding member 2352 can be designed with reference to the shape of the first sliding member 2351.

[0279] In some embodiments, referring to FIG. 26a, the first sliding member 2351 and the second sliding member 2352 are staggered in the thickness direction of the body portion 2312b, and at least a portion of the second sliding member 2352 is located on the side of the first sliding member 2352 away from the second surface m2.

[0280] Specifically, in the thickness direction of the body portion 2312b, one portion of the second sliding member 2352 can be located on the side of the first sliding member 2352 away from the second surface m2, and a portion of the first sliding member 2351 can be located on the side of the second sliding member 2352 close to the second surface m2. In other embodiments, the entire second sliding member 2352 can be located on the side of the first sliding member 2352 away from the second surface m2.

[0281] In this way, referring to FIG. 27a, when the hinge mechanism 23 is in the unfolded state, the second sliding member 2352 can be closer to the first support surface 2331 relative to the first sliding member 2351. Similarly, referring to FIG. 27b, when the hinge mechanism is in the folded state, the second sliding member 2352 can also be closer to the first support surface 2331 relative to the first sliding member 2351.

[0282] In this case, by using the cooperation between the first sliding member 2351 and the first cooperating member 2361 that are farther away from the first support surface 2331, the folding position of the first support member 233 is limited, without considering the thickness of the second portion F2 of the first support member 233 and the second sliding member 2352 that are directly opposite in the second direction e2 when the hinge mechanism 23 is in the folded state, thereby facilitating the reduction of the superimposed thickness of the second cooperating member 2362 and the first support member 233, so that the width of the hinge mechanism 23 can be reduced without increasing the thickness of the hinge mechanism 23, thereby achieving the narrow design of the hinge mechanism 23.

[0283] In some embodiments, referring to FIGS. 27a and 27b, and in combination with FIG. 29a, which is a perspective view of the first support member 233 in the hinge mechanism 23 shown in FIG. 24. The first cooperating member 2361 is formed with a first sliding groove C4, which includes a first opening C41 located at one end of the first sliding groove C4 close to the base 230. When the hinge mechanism 23 is in the unfolded state, the first opening C41 faces the base 230. Referring to FIG. 27b, when the hinge mechanism 23 is in the folded state, the first sliding member 2351 is in interference fit with the first opening C41. In this way, the first sliding member 2351 can be limited by the cooperation between the first opening C41 and the first sliding member 2351. In addition, during assembly, the first sliding member 2351 can also be inserted into the first sliding groove C4 from the first opening C41, which facilitates the reduction of assembly difficulty.

[0284] Further, please refer to FIG. 27a and FIG. 27b, the first sliding slot C4 further comprises a second opening C42. The second opening C42 is located at one end of the first sliding slot C4 away from the base 230. Specifically, please refer to FIG. 29a, the first fitting part 2361 comprises a first side wall surface, and the first side wall surface faces away from the base 230 when the rotation shaft mechanism 23 is in the unfolded state. The first sliding slot C4 penetrates through the first side wall surface to form the second opening C42. Specifically, the first opening C41 and the second opening C42 are respectively located at two ends of the extension path of the first sliding slot C4.

[0285] Please refer to FIG. 27a, the first sliding part 2351 is fitted at the second opening C42 when the rotation shaft mechanism 23 is in the unfolded state. Herein, the first sliding part 2351 can be in interference fit with the first opening C41, or can be in clearance fit. In this way, the blocking structure arranged on the side of the first sliding part 2351 away from the base 230 and used for limiting the first sliding part 2351 is omitted, which can further reduce the width of the first fitting part 2361, and thus is conducive to reducing the width of the rotation shaft mechanism 23, and realizing the narrow design of the rotation shaft mechanism 23.

[0286] Please refer to FIG. 27a and FIG. 27b, the first sliding slot C4 comprises opposite first slot wall surface C43 and second slot wall surface C44, and the first slot wall surface C43 faces the first support part 233. The first sliding part 2351 is in sliding fit with the first slot wall surface C43 of the first sliding slot C4 in the process of switching the rotation shaft mechanism 23 between the unfolded state and the folded state. In this process, the first sliding part 2351 can keep in contact or abutment with the first slot wall surface C43. In this way, the movement stability of the first support part 233 in the process of switching the rotation shaft mechanism 23 between the unfolded state and the folded state can be improved.

[0287] Further, the first sliding part 2351 is in sliding fit with the second slot wall surface C44 of the first sliding slot C4 in the process of switching the rotation shaft mechanism 23 between the unfolded state and the folded state. In this process, the first sliding part 2351 can keep in contact or abutment with the second slot wall surface C44. In this way, the movement stability of the first support part 233 in the process of switching the rotation shaft mechanism 23 between the unfolded state and the folded state can be further improved.

[0288] Please refer to FIG. 28a-FIG. 28b, and combine with FIG. 29b, which is a perspective view of the first support part 233 shown in FIG. 29a from another perspective. The second fitting part 2362 is formed with a second sliding slot C5, and the second sliding part 2352 is in sliding fit with the second sliding slot C5 in at least part of the stroke of switching the rotation shaft mechanism 23 between the unfolded state and the folded state.

[0289] The second sliding groove C5 comprises opposite third and fourth groove wall surfaces C51 and C52, and the third groove wall surface C51 faces away from the first support member 233. During switching of the rotating shaft mechanism 23 between the unfolded state and the folded state, the second sliding member 2352 is in sliding cooperation with the third groove wall surface C51. That is, the third groove wall surface C51 constitutes a cooperation surface for cooperation with the second sliding member 2352. In this way, the movement stability of the first support member 233 during switching of the rotating shaft mechanism 23 between the unfolded state and the folded state can be improved.

[0290] Further, during switching of the rotating shaft mechanism 23 between the unfolded state and the folded state, the second sliding member 2352 is also in sliding cooperation with the fourth groove wall surface C52. In this way, the movement stability of the first support member 233 during switching of the rotating shaft mechanism 23 between the unfolded state and the folded state can be further improved.

[0291] Please refer to FIGS. 28a-28b, and in combination with FIG. 29b, the second sliding groove C5 comprises a third limiting surface C53 located at one end of the second sliding groove C5 away from the base 230. When the rotating shaft mechanism 23 is in the unfolded state, the second sliding member 2352 abuts against the third limiting surface C53. The third limiting surface C53 can be connected between the third and fourth groove wall surfaces C51 and C52. Specifically, the second cooperation member 2362 comprises a second side wall surface n2, and when the rotating shaft mechanism 23 is in the unfolded state, the second side wall surface n2 faces away from the base 230. The second side wall surface and the third limiting surface C53 can define a stop beam H3.

[0292] In this way, the unfolded position of the first swing arm 2312 and the first support member 233 can be limited through cooperation between the second sliding member 2352 and the third limiting surface C53. Moreover, the stop beam H3 defined between the third limiting surface C53 and the second side wall surface n2 of the second cooperation member 2362 is also conducive to improving the overall structural strength of the first cooperation member 2361, thereby improving the cooperation reliability of the second cooperation member 2362 and the second sliding groove C5, and further improving the stability of the first support member 233 in the unfolded position.

[0293] In addition, since the first and second sliding members 2351 and 2352 are staggered in the arrangement direction of the rotating part 2312a and the main body part 2312b, at least a part of the stop beam H3 is located between the first and second sliding members 2351 and 2352 in the arrangement direction of the rotating part 2312a and the main body part 2312b. Therefore, the arrangement of the stop beam H3 does not increase the overall width of the first and second cooperation members 2361 and 2362, and the narrow design of the rotating shaft mechanism 23 can be realized while ensuring the stability of the first support member 233 in the unfolded position.

[0294] Further, please refer to Fig. 28a, the second sliding slot C5 further comprises a third opening C54, and the third opening C54 and the third limiting surface C53 are respectively located at two ends of the extending path of the second sliding slot C5. Among them, the third opening C54 is located at the side of the third limiting surface C53 close to the base 230. For example, please refer to Fig. 28b, when the rotating shaft mechanism 23 is in the folded state, the second sliding piece 2352 is matched with the third opening C54. Specifically, the second sliding piece 2352 can be matched with the third opening C54 in clearance fit or interference fit. In this way, the first sliding piece 2351 and the second sliding piece 2352 can respectively extrude into the first sliding slot C4 and the second sliding slot C5 from the first opening C41 and the third opening C54, and the assembly difficulty of the first swing arm 2312 and the first support piece 233 can be reduced.

[0295] In some embodiments, please refer to Fig. 28b in combination with Fig. 29b, the first support piece 233 is provided with a third avoiding hole K3, and the third avoiding hole K3 comprises an open hole located on the first bottom surface 2332. The third avoiding hole K3 penetrates through the first bottom surface 2332. When the rotating shaft mechanism 23 is in the folded state, at least a part of the second sliding piece 2352 can be accommodated in the third avoiding hole K3. That is, when the rotating shaft mechanism 23 is in the folded state, the whole or a part of the second sliding piece 2352 can be accommodated in the third avoiding hole K3.

[0296] In this way, it is beneficial to further reduce the superimposed thickness of the first support piece 233 and the second matching piece 2362, and thus the thickness of the rotating shaft mechanism 23 can be reduced, and the thin design of the rotating shaft mechanism 23 can be realized.

[0297] On this basis, in the part stroke of the rotating shaft mechanism 23 switching between the unfolded state and the folded state, the second sliding piece 2352 is in sliding fit with the inner wall surface of the third avoiding hole K3. That is, the inner wall surface of the third avoiding hole K3 constitutes part of the fit surface for sliding fit with the second sliding piece 2352. Specifically, in this embodiment, part of the fit surface for sliding fit with the second sliding piece 2352 can be formed on the slot wall surface of the second sliding slot C5, and the other part can be formed on the first support piece 233.

[0298] In this way, the thin design of the rotating shaft mechanism 23 can be realized, and the length of the sliding fit path of the second sliding piece 2352 and the second sliding slot C5 can be increased, so as to ensure the fit reliability of the second sliding piece 2352 and the second sliding slot C5.

[0299] In some embodiments, in order to further reduce the thickness of the rotating shaft mechanism 23, the third avoiding hole K3 further comprises an open hole located on the first support surface 2331, that is, the third avoiding hole K3 also penetrates through the first support surface 2331. In this case, the third avoiding hole K3 is a through hole.

[0300] Further, the third avoiding hole K3 further comprises an open hole on the end surface of the first supporting piece 233 close to the base 230, that is, the third avoiding hole K3 can also penetrate the end surface of the first supporting piece 233 close to the base 230. In this case, the third avoiding hole K3 is formed as a notch. In this way, the interference between the second sliding piece 2352 and the first supporting piece 233 can be further avoided, and the processing difficulty of the third avoiding hole K3 can be reduced.

[0301] The sliding fit structure between the second supporting piece 234 and the third swing arm 2322 in the embodiment is the same as the sliding fit structure between the first supporting piece 233 and the first swing arm 2312 in any embodiment of the application, and will not be described here again.

[0302] In still some embodiments, please refer to FIG. 30, which is a partial sectional view of the rotating shaft mechanism 23 provided in still some embodiments of the application. The rotating shaft mechanism 23 in the embodiment is different from the rotating shaft mechanism 23 in the embodiment shown in FIG. 24 in that the structure of the second fit piece 2362 in the embodiment is different from the structure of the second fit piece 2362 in the embodiment shown in FIG. 24.

[0303] Specifically, please refer to FIG. 30, the second sliding groove C5 in the embodiment penetrates the surface of the second fit piece 2362 away from the first supporting piece 233. That is, the second sliding groove C5 in the embodiment does not comprise the fourth groove wall surface C52 described above. In this case, the second sliding piece 2352 and the first sliding piece 2351 can be staggered in the thickness direction of the main body part 2312b, and at least a part of the first sliding piece 2351 can be located on the side of the second sliding piece 2352 away from the second surface m2. Alternatively, in still some embodiments, the second sliding piece 2352 and the first sliding piece 2351 can also not be staggered in the thickness direction of the main body part 2312b.

[0304] In this way, the thickness of the second fit piece 2362 can be increased, so that the distance between the second fit piece 2362 and the first supporting surface 2331 when the rotating shaft mechanism 23 is in the folded state can be increased while the sliding fit path length of the second sliding piece 2352 and the second fit piece 2362 is ensured, the third avoiding hole K3 described above does not need to be arranged on the first supporting piece 233, and the thickness of the second part F2 of the first supporting piece 233 and the second sliding piece 2352 in the second direction e2 can be ensured, thereby reducing the width of the rotating shaft mechanism 23 while improving the structural strength of the first supporting piece 233, and thereby improving the supporting performance of the first supporting piece 233.

[0305] Other structures of the hinge mechanism 23 of the embodiment can refer to the structures of the hinge mechanism 23 in any embodiment of the present application for design, and will not be repeated here. In addition, it should be understood that the technical features in different embodiments can be combined arbitrarily without contradiction.

[0306] In summary, the hinge mechanism 23 in the embodiments of the present application can effectively control the motion trajectory of the first support 233 while achieving the thinning and / or narrow design of the hinge mechanism 23, and can improve the accuracy of the unfolded position and the folded position of the first support 233, overcome the bottleneck of further thinning and / or narrowing of the foldable electronic device 100, and achieve the design of thinning, long-lasting, etc. of the foldable electronic device 100.

[0307] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0308] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, characterized in that, include: Base; A first swing arm is rotatably connected to the base and can rotate relative to the base about a first axis so that the rotating shaft mechanism can switch between an unfolded state and a folded state. The first axis extends along a first direction. The first swing arm is provided with a first slider and a second slider, which are arranged in the first direction. A first support member is rotatable relative to the base. The first support member is provided with a first mating member and a second mating member. The first mating member includes a first mating surface, and the second mating member includes a second mating surface. When the rotating shaft mechanism switches between the unfolded state and the folded state, the first sliding member slides with the first mating surface, and the second sliding member slides with the second mating surface. At least a portion of the first mating surface is located on the surface of the first mating member facing the first support member, and / or at least a portion of the second mating surface is located on the surface of the second mating member facing away from the first support member.

2. The rotating shaft mechanism according to claim 1, characterized in that, During at least a portion of the travel of the rotating shaft mechanism when switching between the unfolded state and the folded state, the orthographic projection of the first sliding member on the first reference plane overlaps with the orthographic projection of the second mating member on the first reference plane. and / or The orthographic projection of the second slider on the first reference plane overlaps with the orthographic projection of the first mating member on the first reference plane; wherein, the first reference plane is perpendicular to the first direction.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The first mating member includes a first inner end and a first outer end opposite to each other, wherein the first inner end is located on the side of the first outer end closer to the base; The first support member includes a first bottom surface facing the first swing arm, the first inner end being connected to the first bottom surface, and the first outer end being spaced apart from the first bottom surface.

4. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, The first swing arm includes a rotating part and a main body part. The rotating part is connected to the base and is located on the side of the main body part closer to the base. Both the first slider and the second slider are disposed on the main body.

5. The rotating shaft mechanism according to claim 4, characterized in that, In the arrangement direction of the rotating part and the main body, at least a portion of the first slider is located on the side of the second slider away from the rotating part.

6. The rotating shaft mechanism according to claim 4 or 5, characterized in that, The first sliding member includes a first end face and a second end face facing away from each other. The first end face faces away from the first support member and slides with the first mating surface. In the direction from the main body to the rotating part, the distance between the first end face and the second end face gradually decreases.

7. The rotating shaft mechanism according to any one of claims 4-6, characterized in that, The main body includes a first surface facing the first support member, and a first clearance hole is provided on the main body, the first clearance hole including an opening located on the first surface; The first sliding member is located inside the first clearance hole, and the first sliding member includes a first end face facing away from the first support member, and the first end face is slidably engaged with the first mating surface.

8. The rotating shaft mechanism according to claim 7, characterized in that, The first clearance hole includes a first inner wall surface and a second inner wall surface opposite to each other in the first direction. The second inner wall surface includes a first region and a second region. The second region is located on the side of the first region closer to the rotating part, and the second region is recessed relative to the first region in a direction away from the first inner wall surface, so as to form a connecting surface between the second region and the first region. The first sliding member is located between the first inner wall surface and the second region, and the second sliding member is fixedly connected to the connecting surface.

9. The rotating shaft mechanism according to any one of claims 4-8, characterized in that, The first swing arm further includes a transition section, which connects the rotating part and the main body part; The first support member includes a first bottom surface facing the first swing arm. The first support member is provided with an auxiliary support portion protruding from the first bottom surface. When the rotating shaft mechanism is in the unfolded state, the orthographic projection of the auxiliary support portion on the first bottom surface overlaps with the orthographic projection of the transition portion on the first bottom surface.

10. The rotating shaft mechanism according to any one of claims 1-9, characterized in that, The first support member includes a first bottom surface facing the first swing arm. When the pivot mechanism is in the folded state, the first sliding member is clamped between the first bottom surface and the first mating surface.

11. The rotating shaft mechanism according to any one of claims 1-10, characterized in that, The second mating member has a first positioning groove on its surface facing away from the first support member. When the rotating shaft mechanism is in the unfolded state, the second sliding member engages with the first positioning groove.

12. The rotating shaft mechanism according to any one of claims 1-11, characterized in that, The first support member includes a first bottom surface facing the first swing arm, and the second mating member protrudes from the first bottom surface; The second mating member has a second positioning groove on the surface opposite to the first support member or on the first bottom surface. When the rotating shaft mechanism is in the folded state, the second sliding member engages with the second positioning groove.

13. The rotating shaft mechanism according to any one of claims 1-12, characterized in that, The rotating shaft mechanism further includes a first connecting member, and the first support member and the first swing arm are both movably connected to the first connecting member; The first connector includes a third surface and a fourth surface facing away from each other. The third surface faces the first support. The first support has a second clearance hole. The second clearance hole includes an opening on the third surface and an opening on the fourth surface. The second clearance hole is used to avoid the first mating member and the second mating member.

14. The rotating shaft mechanism according to claim 13, characterized in that, The first connector includes a third inner end face and a third outer end face that are opposite to each other. When the rotating shaft mechanism is in the unfolded state, the third inner end face is located on the side of the third outer end face that is closer to the base. The inner wall surface of the second clearance hole is spaced apart from the third inner end face to form a first connecting beam between the second clearance hole and the third inner end face.

15. The rotating shaft mechanism according to claim 13 or 14, characterized in that, The first connector is provided with a reinforcing rib, which surrounds the outer periphery of the second clearance hole and protrudes from the third surface.

16. The rotating shaft mechanism according to claim 15, characterized in that, The first swing arm includes a second surface facing away from the first support member, and the second surface is provided with a relief groove recessed toward the first support member, and the reinforcing rib is accommodated in the relief groove.

17. The rotating shaft mechanism according to any one of claims 1-16, characterized in that, Also includes: The second swing arm is rotatably connected to the base, and the second swing arm and the first swing arm are arranged in the first direction; One of the second swing arm and the first support member is provided with a first limiting hole and the other is provided with a first limiting protrusion, and the first limiting protrusion is slidably engaged with the first limiting hole; The first limiting hole includes a first limiting surface and / or a second limiting surface. When the rotating shaft mechanism is in the unfolded state, the first limiting surface abuts against the first limiting protrusion. When the rotating shaft mechanism is in the folded state, the second limiting surface abuts against the first limiting protrusion.

18. A rotating shaft mechanism, characterized in that, include: Base; A first swing arm is rotatably connected to the base and can rotate relative to the base about a first axis so that the rotating shaft mechanism can switch between an unfolded state and a folded state. The first axis extends along a first direction. The first swing arm includes a rotating part and a main body part. The rotating part is connected to the base and is located on the side of the main body part closer to the base. The main body is provided with a first slider and a second slider, the first slider and the second slider are spaced apart in the first direction, and in the arrangement direction of the rotating part and the main body, at least a portion of the first slider is located on the side of the second slider away from the rotating part; A first support member is rotatable relative to the base between an unfolded position and a folded position. The first support member is provided with a first mating member and a second mating member. When the rotating shaft mechanism is in the folded state, the first sliding member cooperates with the first mating member to restrict the first support member from rotating in a direction away from its unfolded position. When the rotating shaft mechanism is in the unfolded state, the second sliding member cooperates with the second mating member to restrict the first support member from rotating in a direction away from its folded position.

19. The rotating shaft mechanism according to claim 18, characterized in that, The first slider and the second slider are offset in the thickness direction of the main body.

20. The rotating shaft mechanism according to claim 19, characterized in that, The main body includes a first surface and a second surface that are opposite to each other in its thickness direction. The first surface faces the first support member. In the thickness direction of the main body, at least a portion of the second slider is located on the side of the first slider that is opposite to the second surface.

21. The rotating shaft mechanism according to any one of claims 18-20, characterized in that, The first mating component is provided with a first sliding groove, the first sliding groove includes a first opening, the first opening is located at one end of the first sliding groove near the base; when the rotating shaft mechanism is in the folded state, the first sliding component is interference-fitted with the first opening.

22. The rotating shaft mechanism according to any one of claims 18-21, characterized in that, The first mating component is provided with a first sliding groove, the first sliding groove includes a second opening, the second opening is located at the end of the first sliding groove away from the base, and when the rotating shaft mechanism is in the unfolded state, the first sliding component is engaged with the second opening.

23. The rotating shaft mechanism according to any one of claims 18-22, characterized in that, The second mating component is provided with a second sliding groove, the second sliding groove includes a third limiting surface, the third limiting surface is located at the end of the second sliding groove away from the base, and when the rotating shaft mechanism is in the unfolded state, the second sliding component abuts against the third limiting surface.

24. The rotating shaft mechanism according to claim 23, characterized in that, The second groove penetrates the surface of the second mating member opposite to the first support member.

25. The rotating shaft mechanism according to claim 23 or 24, characterized in that, The first support member includes a first support surface and a first bottom surface facing away from each other. The first swing arm is located on the side facing the first bottom surface of the first support member. The first support member is provided with a third clearance hole. The third clearance hole includes an open opening located on the first bottom surface. When the rotating shaft mechanism is in a folded state, at least a portion of the second sliding member is accommodated in the third clearance hole.

26. A foldable electronic device, characterized in that, include: First shell and second shell; A rotating shaft mechanism, wherein the rotating shaft mechanism is any one of claims 1-25, and the rotating shaft mechanism is connected between the first housing and the second housing.

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