Rotating shaft mechanism and folding electronic equipment

Abstract

The embodiment of the utility model provides a rotating shaft mechanism and folding electronic equipment. The rotating shaft mechanism comprises a structural part, a movable part, a fixed part and a damping part. The moving part is arranged on the circumferential outer side of the structural part in a sleeving mode and can move relative to the structural part in the first direction. The fixing part of the fixing piece is arranged on the circumferential outer side of the structural piece in a sleeving mode and is relatively fixed to the structural piece. At least one of the moving part and the fixed part is provided with an accommodating groove on the opposite side. The damping piece is arranged on the circumferential outer side of the structural piece in a sleeving mode and located between the movable piece and the fixed part; the damping piece is provided with two end portions in the first direction, the end portion close to the containing groove is arranged in the containing groove, and the sides, away from each other, of the two end portions are connected with the moving piece and the structural piece respectively and are relatively fixed. According to the rotating shaft mechanism, the problem of shadow or failure of the folding screen due to the fact that the damping piece abuts against the folding screen can be avoided.

Description

Technical Field

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

[0002] At present, foldable electronic devices have been widely used in people's daily lives.

[0003] A foldable electronic device has a hinge mechanism to enable the foldable electronic device to switch between a flattened state and a folded state. A damping component is usually provided in the hinge mechanism. The damping component includes a structural member, a moving member and a damping member. The moving member and the damping member are both sleeved on the circumferential outer side of the structural member. During the switching process of the foldable electronic device between the folded state and the flattened state, the moving member will move relative to the structural member along a first direction so that the damping member is compressed or stretched along the first direction. The first direction is the length direction of the hinge mechanism and is parallel to the axial direction of the structural member. During the multiple opening and closing of the foldable electronic device, the damping member will be repeatedly compressed or stretched. After the damping member is compressed or stretched (referred to as telescoping) multiple times, instability will occur, so that the damping member may press against the folding screen of the foldable electronic device, causing light and shadow problems on the folding screen or even failure.

[0004] Therefore, how to prevent the damping member from pressing the folding screen after multiple extensions and contractions has become a technical problem to be solved. Utility Model Content

[0005] The present application provides a hinge mechanism and a foldable electronic device, which can prevent the folding screen from having light and shadow problems or failure due to the damping member pressing against the folding screen.

[0006] According to a first aspect of an embodiment of the present application, a rotating shaft mechanism is provided. The rotating shaft mechanism includes a damping unit. The damping unit includes:

[0007] Structural parts;

[0008] A moving member, sleeved on the circumferential outer side of the structural member, the moving member can move relative to the structural member along a first direction, and the first direction is parallel to the axial direction of the structural member;

[0009] The fixing member comprises a fixing portion, which is sleeved on the circumferential outer side of the structural member and fixed relative to the structural member; along the first direction, the fixing portion and the moving member are arranged at different positions of the structural member; at least one of the moving member and the fixing portion is provided with a receiving groove on the opposite side;

[0010] The damping member is sleeved on the circumferential outer side of the structural member and is located between the moving member and the fixed part; the damping member has two ends in the first direction, the end adjacent to the accommodating groove is arranged in the accommodating groove, and the opposite sides of the two ends are respectively connected to the moving member and the structural member and are relatively fixed.

[0011] In the embodiment of the present application, through the arrangement of the moving part and the damping part in the rotating shaft mechanism, when the moving part moves in the first direction toward one side of the damping part, the damping part can be compressed, so that the damping part will generate force feedback to the user during the opening and closing of the foldable electronic device, so that the user has an opening and closing feel during the opening and closing of the foldable electronic device. On this basis, through the arrangement of the receiving groove, and because the end of the damping part adjacent to the receiving groove is arranged in the receiving groove, the end of the damping part can be wrapped in at least one of the moving part and the fixed part. In this way, the receiving groove can guide the expansion and contraction of the damping part, so that the damping part can expand and contract in a predetermined direction, and the risk of instability of the damping part when compressed can be reduced, so as to prevent the damping part from being lateral twisted and deformed toward one side of the folding screen when compressed and pressing the folding screen, thereby avoiding the problem of light and shadow and failure of the folding screen. In addition, the present application does not need to increase the outer diameter of the structural part, and will not increase the weight of the structural part, so that the rotating shaft mechanism conforms to the lightweight design of the rotating shaft mechanism and the folding electronic device. In addition, the arrangement of the receiving groove can effectively prevent the damping member from becoming unstable when compressed, thereby extending the service life of the damping member and the service life of the foldable electronic device.

[0012] In some optional embodiments, the receiving groove has a notch and an inner bottom wall, and the end portion corresponding to the receiving groove is disposed in the receiving groove through the notch, and along the first direction, the side of the end portion away from the notch is abutted or fixedly connected to the inner bottom wall, so that the end portion of the damping member can be disposed in the receiving groove through the notch, and the end portion of the damping member can also be relatively fixed to the moving member or the fixed portion. In addition, since the side of the end portion away from the notch is abutted or fixedly connected to the inner bottom wall, when the moving member moves in the first direction, a force is applied to the side of the end portion of the damping member away from the notch at the inner bottom wall, so as to ensure that the side of the end portion away from the notch can move along the first direction toward one side of the fixed portion under the push of the force, so as to compress the damping member.

[0013] In some optional embodiments, the receiving groove has an inner side wall, which is arranged on one side of the inner bottom wall and together with the inner bottom wall forms the receiving groove, and a side of the inner side wall away from the inner bottom wall forms a notch;

[0014] When the end is arranged in the receiving groove, the inner side wall blocks the circumferential outer wall of the end so that the end is wrapped by the inner side wall of the receiving groove. At the same time, the damping member undergoes transverse twisting deformation toward one side along the second direction (Z direction) under the action of the destabilizing force and contacts the inner side wall of the receiving groove. At this time, the inner side wall will act as the groove wall of the receiving groove to exert a reaction force on the damping member, so that the damping member is offset to one side along the second direction toward the center of the receiving groove under the reaction force F', thereby reducing the risk of instability of the damping member when it is compressed.

[0015] In some optional embodiments, the groove depth of the accommodating groove is less than half of the total length of the damping member, and the groove depth of the accommodating groove and the length direction of the damping member are parallel to the first direction. In this way, while ensuring that the end is wrapped in the accommodating groove, the groove depth of the accommodating groove can be avoided to be too large, so as to reduce the length of the thin arm on the moving member and enhance the strength and structural stability of the moving member at the inner side wall. In addition, when the length of the thin arm on the moving member is reduced, the weight of the moving member can also be controlled within a smaller range to avoid the weight of the moving member from increasing and affecting the lightweight design of the rotating shaft mechanism.

[0016] In some optional embodiments, when the end is disposed in the receiving groove:

[0017] There is a gap between the circumferential outer wall and the inner side wall of the end portion so that the end portion can be arranged in the receiving groove through the notch to realize the assembly of the damping member in the moving member, and / or,

[0018] There is a gap between the circumferential inner wall of the end and the structural member, so that the structural member can be inserted into the damping member, and the damping member can be smoothly sleeved on the circumferential outer side of the structural member.

[0019] In some optional embodiments, the inner bottom wall may have a through hole for penetrating the structural member, and along the first direction, the through hole is opposite to the notch, and the inner bottom wall is perpendicular to the first direction. In this way, the structural member can pass through the notch and the through hole along the first direction, so that the moving member can be sleeved on the circumferential outer side of the structural member, and at the same time, the axial direction of the structural member can be parallel to the first direction, so as to ensure that the moving member can move along the first direction and compress the damping member.

[0020] In some optional embodiments, the movable part and the fixed part are both provided with a receiving groove on the opposite sides;

[0021] The two receiving grooves are opposite to each other in the first direction and correspond to the two ends one by one; the two ends are respectively arranged in the corresponding receiving grooves so that the two ends can be respectively wrapped in the moving part and the fixed part, so as to achieve a better effect of preventing the damping part from becoming unstable.

[0022] In some optional embodiments, the damping member has a first side and a second side in the second direction, and the first side is configured to be disposed adjacent to the folding screen;

[0023] The structural member has a concave surface on a circumferential side wall facing the first side, and along the second direction, the concave surface is opposite to at least a portion of the damping member to increase the gap between the damping member and the structural member;

[0024] The second direction is perpendicular to the first direction.

[0025] By setting the concave surface, the damping member can more easily overcome the supporting force of the structural member on the first side of the damping member under the action of the destabilizing force and undergo lateral twisting deformation toward the side (the second side) away from the folding screen, so that when the damping member undergoes lateral twisting deformation under the action of the destabilizing force, it can deform toward the second side, so as to further avoid the damping member pressing against the folding screen, causing light and shadow problems or failure of the folding screen.

[0026] In some optional embodiments, part of the damping member is exposed outside the moving member and the fixed member, and along the second direction, the recessed surface is opposite to the part of the damping member exposed outside the moving member and the fixed member, so as to ensure that when the damping member is laterally twisted and deformed under the action of the destabilizing force, the part of the damping member exposed outside the moving member and the fixed member can be deformed toward the second side, so as to further avoid the damping member pressing against the folding screen, causing light and shadow problems or failure of the folding screen.

[0027] In some optional embodiments, the concave surface has a first projection in the second direction, and the length of the first projection is greater than one quarter of the total length of the damping member and less than or equal to one half of the total length of the damping member;

[0028] The length direction of the first projection is parallel to the first direction.

[0029] By limiting the length of the first projection, the recessed surface has a certain length in the first direction to ensure that the recessed surface can be opposite to more damping members in the second direction, thereby increasing the size of the deformation space in the first direction to ensure that the damping member can deform toward the second side.

[0030] In some optional embodiments, the recessed surface is an arc-shaped surface, and the recessed surface is smoothly connected to the remaining circumferential side walls of the structural member on the first side, so as to prevent the damping member from being stuck at the position where the recessed surface connects with the remaining circumferential side walls of the structural member on the first side when the damping member extends and contracts in the first direction or the foldable electronic device shakes or accidentally falls, thereby ensuring the smooth opening and closing of the foldable electronic device.

[0031] In some optional embodiments, along the first direction, a first assembly surface and a second assembly surface are provided on the circumferential side wall of the structural member at intervals, the movable member is sleeved on the first assembly surface, and the fixed member is sleeved on the second assembly surface;

[0032] The recessed surface is located between the first assembly surface and the second assembly surface, and is recessed toward one side of the center of the structural member relative to the first assembly surface and the second assembly surface to ensure that at least part of the damping member can be opposite to the recessed surface, thereby increasing the gap between at least part of the damping member and the structural member.

[0033] In some optional embodiments, the structural member has a convex surface on the circumferential side wall facing the second side;

[0034] Along the second direction, the convex surface is opposite to the concave surface to reduce the gap between the damping member and the structural member.

[0035] By setting the raised surface, the supporting force of the structural member on the damping member at the raised surface on the second side can be increased, so that when the damping member undergoes lateral twisting deformation under the action of the instability force, it is easier to overcome the supporting force of the structural member on the damping member on the first side and deform toward the second side, so as to further avoid the damping member pressing against the folding screen, causing light and shadow problems or failure of the folding screen.

[0036] In some optional embodiments, the concave surface has a first projection in the second direction, and the convex surface has a second projection in the second direction;

[0037] The length of the second projection matches the length of the first projection;

[0038] The length directions of the first projection and the second projection are both parallel to the first direction.

[0039] By limiting the length of the second projection, the raised surface has a certain length in the first direction to ensure that the raised surface can be opposite to more damping members in the second direction, so as to reduce the gap between more parts of the damping members in the first direction and the structural member, so that the structural member has a greater supporting force on more damping members at the raised surface to ensure that the damping members can deform toward the second side.

[0040] In some optional embodiments, the raised surface is an arc-shaped surface, and the raised surface is smoothly connected to the remaining circumferential side walls of the structural member on the second side, so as to prevent the damping member from being stuck at the position where the recessed surface connects with the remaining circumferential side walls of the structural member on the second side when the damping member expands and contracts in the first direction or the foldable electronic device shakes or accidentally falls, thereby ensuring the smooth opening and closing of the foldable electronic device.

[0041] In some optional embodiments, the damping member includes a spring, and the damping member includes a circular spring, a square spring, or a rectangular spring. In this way, while ensuring that the damping member can be extended and retracted, the structure of the damping member can be more diversified to meet the requirements of the rotating shaft mechanism for different structures of the damping member.

[0042] When the damping member is a square spring or a rectangular spring, the two ends facing away from each other are respectively fitted with the moving member and the structural member and relatively fixed to ensure that the damping member has a good fitting effect with the moving member and the structural member at both ends, thereby ensuring stable contact between the end and the inner bottom wall and enhancing the stability of the connection between the damping member and the moving member and the structural member.

[0043] When the damping element is a circular spring, an arc-shaped protrusion is provided on the inner bottom wall of the accommodating groove;

[0044] The arc-shaped protrusion is located within the projection range of the damping member on the inner bottom wall, and the circumferential inner wall of the end is tangent to and in contact with the arc-shaped protrusion; the tangent angle between the circumferential inner wall of the end and the arc-shaped protrusion matches the helix angle of the damping member.

[0045] By setting the arc-shaped protrusion, it can cooperate with the receiving groove to further prevent the damping member from pressing the folding screen due to instability, causing the folding screen to have light and shadow problems or failure. In some optional embodiments, the shaft mechanism includes a shaft cover and a damping component, and the damping component includes two damping units;

[0046] The two damping units are located on both sides of the shaft cover in the third direction, and the moving parts of the two damping units are connected. The two damping units share a fixed part, and the fixed part includes two fixed parts, and the two fixed parts are respectively sleeved on the circumferential outer sides of the two structural parts;

[0047] Wherein, the third direction is the width direction of the shaft cover and is perpendicular to the first direction;

[0048] The fixing piece is fixedly connected to the shaft cover.

[0049] This can ensure the consistency of the expansion and contraction of the two damping parts in their own expansion and contraction directions, and can provide the user with greater force feedback during the opening and closing of the foldable electronic device, so that the user has a more comfortable opening and closing feel during the opening and closing of the foldable electronic device.

[0050] In some optional embodiments, the damping assembly further comprises two synchronous swing arms, the two synchronous swing arms are rotatably arranged on both sides of the shaft cover in the third direction, and the two synchronous swing arms can synchronously rotate toward the opposite side or the opposite side relative to the shaft cover;

[0051] A synchronous swing arm is respectively provided on one side of the two moving parts away from the damping part, and the moving parts are meshed with the corresponding synchronous swing arms; the synchronous swing arms are constructed to drive the meshed moving parts to move along the first direction toward one side of the damping part when rotating relative to the shaft cover.

[0052] In this way, when the two synchronous swing arms rotate synchronously, the corresponding moving member can be driven to move relative to the structural member toward one side of the damping member along the first direction, thereby achieving synchronous compression of the two damping members. In addition, the synchronous swing arm can also replace the damping swing arm in the traditional shaft mechanism to simplify the structure of the shaft mechanism.

[0053] The second aspect of the embodiment of the present application further provides a shaft mechanism, the shaft mechanism includes a damping unit, and the damping unit includes:

[0054] Structural parts;

[0055] A moving member, sleeved on the circumferential outer side of the structural member, the moving member can move relative to the structural member along a first direction, and the first direction is parallel to the axial direction of the structural member;

[0056] The fixing member comprises a fixing portion, which is sleeved on the circumferential outer side of the structural member and fixed relative to the structural member; along the first direction, the fixing portion and the moving member are arranged at different positions of the structural member;

[0057] A damping member is sleeved on the outer side of the structural member in the circumferential direction and is located between the moving member and the fixed part. The damping member has two ends in the first direction, and the two ends are respectively connected to the moving member and the structural member on opposite sides and are relatively fixed.

[0058] The damping member has a first side and a second side in the second direction, and the first side is configured to be disposed adjacent to the folding screen;

[0059] The structural member has a concave surface on the circumferential side wall facing the first side, and along the second direction, the concave surface is opposite to at least part of the damping member to increase the gap between at least part of the damping member and the structural member; the second direction is perpendicular to the first direction. By setting the concave surface on the structural member, the damping member can more easily overcome the support force of the structural member on the first side to the damping member under the action of the destabilizing force and deform laterally toward the side (the second side) away from the folding screen, so that when the damping member deforms laterally under the action of the destabilizing force, it can deform toward the second side, so as to further avoid the damping member pressing the folding screen, causing light and shadow problems or failure of the folding screen.

[0060] A third aspect of the embodiments of the present application further provides a foldable electronic device, the foldable electronic device comprising a first middle frame, a second middle frame, a foldable screen and a hinge mechanism as described above, wherein the hinge mechanism is connected between the first middle frame and the second middle frame;

[0061] The folding screen is located on the side of the hinge mechanism where the damping member is located, and connects the first middle frame and the second middle frame.

[0062] By setting up the hinge mechanism, while realizing the switching of the foldable electronic device between the folded state and the flattened state, it is possible to prevent the damping member from pressing the folding screen, causing light and shadow problems or failure of the folding screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic diagram of the structure of a foldable electronic device in a folded state provided by an embodiment of the present application;

[0064] Figure 2 for Figure 1 A schematic diagram of the structure of a foldable electronic device in an unfolded state;

[0065] Figure 3 for Figure 1 A schematic diagram of a structure of a foldable electronic device in an intermediate state between a folded state and a flattened state;

[0066] Figure 4 for Figure 1 A schematic diagram of a disassembled structure of a foldable electronic device;

[0067] Figure 5 A schematic diagram of the structure of a rotating shaft mechanism provided in an embodiment of the present application;

[0068] Figure 6 A schematic diagram of force analysis of a damping member provided in an embodiment of the present application;

[0069] Figure 7 for Figure 6 Schematic diagram of the structure in which the middle damping member undergoes lateral twisting deformation;

[0070] Figure 8 A schematic structural diagram of a first damping assembly provided in an embodiment of the present application;

[0071] Fig. 9 for Figure 8 Cross-section view in the AA direction;

[0072] Fig.10 for Fig. 9 Enlarged view at B;

[0073] Fig.11 A schematic diagram of a structure in which both the moving part and the fixed part provided in the embodiment of the present application are provided with a receiving groove;

[0074] Fig.12 for Figure 8 A partial schematic diagram of the middle damping component;

[0075] Fig.13 A schematic diagram of the structure of a structural member provided in an embodiment of the present application at a first viewing angle;

[0076] Fig.14 for Fig.13 A schematic diagram of the structure of the middle structural part at a second viewing angle;

[0077] Fig.15 An exploded view of a first damping assembly provided in an embodiment of the present application;

[0078] Fig.16 An internal schematic diagram of a second damping assembly provided in an embodiment of the present application;

[0079] Fig.17 A partial internal schematic diagram of a third damping assembly provided in an embodiment of the present application.

[0080] Reference numerals:

[0081] 100- Foldable electronic devices;

[0082] 1- Rotating shaft mechanism;

[0083] 11- shaft cover;

[0084] 12-connecting frame;

[0085] 13-main swing arm assembly; 131-main swing arm;

[0086] 14- auxiliary swing arm assembly; 141- auxiliary swing arm;

[0087] 15-fixed plate;

[0088] 16- Damping unit;

[0089] 161-structural member; 1611-recessed surface; 1612-first assembly surface; 1613-second assembly surface; 1614-convex surface;

[0090] 162- moving parts;

[0091] 163-damping member; 1631-end; 1632-end surface; 1633-first side; 1634-second side;

[0092] 164-accommodating groove; 1641-inner bottom wall; 1642-inner side wall; 1643-arc-shaped protrusion;

[0093] 165-fixing member; 1651-fixing portion; 1652-locking portion;

[0094] 166-installation group; 1661-installation sheet; 1662-circlip;

[0095] 167-synchronous swing arm; 1671-pushing cam; 167a-first synchronous swing arm; 167b-second synchronous swing arm;

[0096] 168 - engagement groove;

[0097] 169-engagement protrusion;

[0098] 17-synchronous gear;

[0099] 18-rotating shaft;

[0100] 2-Middle frame;

[0101] 21-first middle frame; 22-second middle frame; 23-middle plate; 24-frame;

[0102] 3- Back cover;

[0103] 4- Folding screen;

[0104] 41-first area; 42-second area; 43-bendable area;

[0105] 5- Non-folding screen. DETAILED DESCRIPTION

[0106] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0107] The embodiment of the present application provides a foldable electronic device, which may include but is not limited to a mobile phone, a tablet computer (i.e., a pad), a virtual reality (VR) device, a laptop computer, a personal computer (PC), an ultra-mobile personal computer (UMPC), a handheld computer, a smart wearable device, and other foldable electronic devices. The smart wearable device may include but is not limited to a smart watch and a smart bracelet.

[0108] Figures 1 to 3 Different configurations of the foldable electronic device 100 applicable to the present application are illustrated respectively. Figure 1 The foldable electronic device 100 is shown in a folded state. Figure 2 The foldable electronic device 100 is shown in a flattened configuration. Figure 3 The configuration of the foldable electronic device 100 in an intermediate state between the folded state and the flattened state is illustrated.

[0109] Combine the following Figures 1 to 3 The structure of the foldable electronic device 100 is described in detail. The foldable electronic device 100 includes a hinge mechanism 1 and two middle frames 2, which are rotatably connected through the hinge mechanism 1. The two middle frames 2 are respectively a first middle frame 21 and a second middle frame 22. The hinge mechanism 1 is connected between the first middle frame 21 and the second middle frame 22, so that the first middle frame 21 and the second middle frame 22 can rotate relative to each other around the hinge mechanism 1, thereby realizing the flattening and folding of the foldable electronic device 100.

[0110] The first middle frame 21 and the second middle frame 22 can be arranged along Figure 3 Move in the direction indicated by the arrow to achieve Figure 1 The folded state shown in . Figure 1 As shown in FIG. 1 , when the foldable electronic device 100 is in the folded state, the first middle frame 21 and the second middle frame 22 are stacked on top of each other.

[0111] The first middle frame 21 and the second middle frame 22 can also be arranged along Figure 3 Move in the opposite direction of the arrow to achieve Figure 2 See the flattened state shown in . Figure 2 As shown in FIG, when the foldable electronic device 100 is in a flattened state, the first middle frame 21 and the second middle frame 22 are in the same plane.

[0112] Foldable electronic device 100 Foldable electronic device 100 Figures 1 to 3 The structure of a foldable electronic device 100 that can be folded once is shown in FIG. In some embodiments, the foldable electronic device 100 can also be folded twice or more (more than twice). In this case, the foldable electronic device 100 can include multiple middle frames 2 that are connected and rotated in sequence. Two adjacent middle frames 2 can be relatively far apart when rotating to unfold to a flat state, and two adjacent middle frames 2 can be relatively close to each other when rotating to fold to a folded state. In the present application, the number of middle frames 2 in the foldable electronic device 100 is not particularly limited.

[0113] The structure of the foldable electronic device 100 is further described below by taking two middle frames 2 as an example.

[0114] Figure 4 Schematically shows Figure 2 The disassembled structure of the foldable electronic device 100.

[0115] See also Figure 4 As shown, the middle frame 2 includes a middle plate 23 and a frame 24 connected to each other, the frame 24 is arranged around the peripheral edge of the middle plate 23, and together with the middle plate 23, it constitutes the middle frame 2. The portion of the frame 24 exposed on the outer surface of the foldable electronic device 100 can form the appearance surface of the middle frame 2.

[0116] Continue to see Figure 4 The foldable electronic device 100 further includes a back cover 3, which can be covered on the first middle frame 21 and form a receiving cavity with the covered first middle frame 21. The receiving cavity can accommodate electronic devices such as circuit boards, batteries, and cameras of the foldable electronic device 100. Figure 4 In the figure, only one back cover 3 is shown, but this does not limit the number of back covers 3. For example, the foldable electronic device 100 may include two back covers 3, which are respectively covered on the first middle frame 21 and the second middle frame 22.

[0117] The structure of the foldable electronic device 100 is further described below by taking the example that the number of the rear cover 3 is one and the cover is arranged on the first middle frame 21 .

[0118] Continue to see Figure 4The foldable electronic device 100 may further include a display screen, and the display screen may include a foldable screen 4, which may be a flexible display screen. The foldable screen 4 may be connected to the same side of the first middle frame 21 and the second middle frame 22, and may be distributed on opposite sides of the first middle frame 21 with the back cover 3. Specifically, the foldable screen 4 includes a first area 41, a second area 42, and a bendable area 43, and the bendable area 43 is located between the first area 41 and the second area 42. The first area 41 may be fixedly connected to the first middle frame 21 to support and fix the first area 41 on the first middle frame 21. The second area 42 may be fixedly connected to the second middle frame 22 to support and fix the second area 42 on the first middle frame 21. The bendable area 43 may be arranged corresponding to the hinge mechanism 1.

[0119] During the switching process of the foldable electronic device 100 between the folded state and the flattened state, the bendable area 43 can bend so that the foldable screen 4 can be folded or unfolded with the movement of the first middle frame 21 and the second middle frame 22, so as to realize the switching of the foldable electronic device 100 between the folded state and the flattened state. At the same time, it can meet the user's needs for a large display area and easy carrying of the foldable electronic device 100.

[0120] Continue to see Figure 4 Combined with Figure 3 When the foldable electronic device 100 is in the flattened state, the foldable screen 4 is also in the flattened state. At this time, the bendable area 43 is in the flattened state without bending, and the first area 41 and the second area 42 are located on both sides of the bendable area 43 and are in the same plane with the bendable area 43, so as to provide a larger display area for the user.

[0121] Continue to see Figure 4 Combined with Figure 2 When the foldable electronic device 100 is in the folded state, the foldable screen 4 is also in the folded state. At this time, the first area 41 and the second area 42 are stacked relative to each other, and the bendable area 43 is in a bent state. When the foldable screen 4 is in the folded state, it can be surrounded by the inner side of the first middle frame 21 and the second middle frame 22 and is invisible to the user. This foldable electronic device 100 can be called an inner foldable electronic device 100.

[0122] Continue to see Figure 4 In some embodiments, in addition to the folding screen 4, the display screen may also include a non-folding screen 5, which may be a rigid display screen. The non-folding screen 5 may be connected to the side of the second middle frame 22 opposite to the folding screen 4. Both the folding screen 4 and the non-folding screen 5 are electrically connected to the circuit board inside the foldable electronic device 100, and may be used to display various information and receive information input by the user.

[0123] The hinge mechanism 1 is the key to enable the foldable electronic device 100 to be folded and unfolded. The structure of the hinge mechanism 1 is further described below in conjunction with the accompanying drawings and embodiments.

[0124] Figure 5 Schematic diagram of the structure of a rotating shaft mechanism 1 is shown. Figure 5 As shown, the pivot mechanism 1 includes a shaft cover 11, a connecting frame 12 and a connecting assembly (not marked). The shaft cover 11 is the main supporting structure of the pivot mechanism 1. The shaft cover 11 is located between the first middle frame 21 and the second middle frame 22, and the shaft cover 11 extends along the side edges of the opposite sides of the first middle frame 21 and the second middle frame 22. The shaft cover 11 can be regarded as the rotation axis of the first middle frame 21 and the second middle frame 22, and the first middle frame 21 and the second middle frame 22 rotate around a first direction relative to the length direction of the shaft cover 11. For ease of description, the length direction of the pivot mechanism 1 is defined as the first direction, the thickness direction of the pivot mechanism 1 is defined as the second direction, and the width direction of the pivot mechanism 1 is defined as the third direction. The first direction, the second direction and the third direction are perpendicular to each other. For example, the first direction is perpendicular to the second direction and the third direction, and the second direction is perpendicular to the first direction and the third direction. Among them, the first direction can refer to the accompanying drawing ( Figure 4 and Figure 5 ) in the Y direction, and the second direction can be seen in the attached figure ( Figure 4 ) in the Z direction, and the third direction can be seen in the attached figure ( Figure 4 ) in the X direction.

[0125] In the following description, the first direction is uniformly replaced by the Y direction, the second direction is uniformly replaced by the Z direction, and the third direction is uniformly replaced by the Z direction.

[0126] Continue to see Figure 5 The connecting frame 12 can be distributed on both sides of the shaft cover 11 along the X direction, and fixedly connected to the first middle frame 21 or the second middle frame 22 on the corresponding side. The connecting frame 12 can be movably connected to the shaft cover 11 through a connecting component, so that the connecting frame 12 can move relative to the shaft cover 11 through the connecting component, driving the first middle frame 21 and the second middle frame 22 to rotate relative to the shaft cover 11 around the Y direction, thereby realizing the switching of the foldable electronic device 100 between the folded state and the flattened state.

[0127] Continue to see Figure 5, the connecting assembly may include a main swing arm assembly 13. The main swing arm assembly 13 may be multiple (including two), and the multiple main swing arm assemblies 13 may be arranged on the shaft cover 11 at intervals along the Y direction. Among them, the main swing arm assembly 13 includes two main swing arms 131, and the two main swing arms 131 are located on both sides of the shaft cover 11 in the X direction, and are movably connected between the corresponding connecting frame 12 and the shaft cover 11, so that under the transmission effect of the main swing arm assembly 13, the connection frame 12 can be rotated and displaced (moved away from or close to) relative to the shaft cover 11, so as to drive the first middle frame 21 and the second middle frame 22 to rotate relative to the shaft cover 11 around the Y direction, thereby realizing the switching of the foldable electronic device 100 between the folded state and the flattened state. For example, one end of the main swing arm 131 can be slidably and rotatably connected to the corresponding connecting frame 12, and the other end of the main swing arm 131 can be slidably and rotatably connected to the shaft cover 11. The connection between the main swing arm 131 and the connecting frame 12 and the shaft cover 11 can be determined according to the structure of the existing rotating shaft mechanism 1, and will not be repeated in this application.

[0128] Continue to see Figure 5 , the connecting assembly may include an auxiliary swing arm assembly 14. There may be multiple auxiliary swing arm assemblies 14, and multiple auxiliary swing arm assemblies 14 may be arranged on the shaft cover 11 at intervals along the Y direction. Among them, the auxiliary swing arm assembly 14 includes an auxiliary swing arm 141, and the two auxiliary swing arms 141 are located on both sides of the shaft cover 11 in the X direction, and are movably connected between the corresponding connecting frame 12 and the shaft cover 11. Through the cooperation of the auxiliary swing arm assembly 14 and the main swing arm assembly 13, the connection strength between the connecting frame 12 and the shaft cover 11 can be enhanced, and the stability of the movement of the connecting frame 12 relative to the shaft cover 11 can be improved. The connection between the auxiliary swing arm 141 and the connecting frame 12 and the shaft cover 11 can be determined according to the structure of the existing rotating shaft mechanism 1, and will not be repeated in this application.

[0129] The connection assembly includes a damping assembly. The damping assembly may be one or more, and multiple damping assemblies may be arranged on the shaft cover 11 at intervals along the Y direction. In the Z direction, the damping assembly is arranged on the side of the shaft cover 11 facing the folding screen 4. The damping assembly includes two damping units 16, which are located on both sides of the shaft cover 11 in the X direction and are movably connected between the corresponding connecting frame 12 and the shaft cover 11.

[0130] In the related art, the damping unit includes a structural member, a moving member, a damping member and a damping swing arm. The structural member can be a pin shaft. The moving member can be a cam bracket. The damping swing arm is movably connected between the corresponding connecting frame 12 and the shaft cover 11. For example, one end of the damping swing arm is rotatably arranged on the shaft cover 11 and meshed with the moving member, and the other end of the damping swing arm can be slidably connected with the corresponding connecting frame 12. Along the Y direction, the moving member and the damping member are sleeved at different positions of the structural member, and the damping member is arranged on the side of the moving member away from the damping swing arm. One end of the damping member is fixed to the structural member, and the other end is connected to the moving member. The axial direction of the structural member is parallel to the Y direction. The damping member is an elastic structure that can be compressed and elastically deformed under the action of an external force, and can automatically stretch under the action of a rebound force when the external force disappears. For example, the damping member is a spring, etc.

[0131] The structure of the foldable electronic device 100 is further described below by taking the damping element as a spring as an example.

[0132] During the process of the foldable electronic device 100 opening and closing to switch between the folded state and the flattened state, the damping swing arm rotates relative to the shaft cover 11, and the movable member moves toward one side of the damping member along the Y direction under the drive of the damping swing arm, so that the damping member is compressed along the Y direction. During the compression process, the damping member generates an elastic force. At the same time, when the damping swing arm rotates relative to the shaft cover 11, the damping swing arm will have a process of not engaging with the damping member. At this time, the elastic force generated by the damping member will drive the movable member to move toward one side of the damping swing arm along the Y direction and re-engage with the damping swing arm, so that the damping member is stretched in the Y direction. The compression and stretching of the damping member are collectively referred to as telescoping hereinafter.

[0133] The elastic force generated by the damping member can also provide force feedback to the user during the opening and closing process of the foldable electronic device 100, so that the user can feel the opening and closing of the foldable electronic device 100. In this way, when the user opens and closes the foldable electronic device 100, the user can judge whether the foldable electronic device 100 can switch between the folded state and the flattened state according to the opening and closing feeling.

[0134] Figure 6 163a is a schematic diagram of a force analysis of a damping member. For ease of description, the damping member mentioned in the above related art is marked with 163a. Figure 6 As shown, when the moving member moves along the Y direction toward the side close to the damping member 163a during the opening and closing process of the foldable electronic device 100, a force F (thrust) is applied to the damping member 163a, and the damping member 163a will be compressed along the Y direction under the action of the force F.

[0135] Continue to see Figure 6As shown, since the damping member 163a is a spring, and the spring is a spiral structure, the damping member 163a has a helical angle α. The force F applied to the damping member 163a is decomposed into a force F1 and a force F2 in the spiral direction of the damping member 163a (spring) at the helical angle α. Among them, the angle between the force F2 and the force F is equal to the helical angle α. The force F1 will generate a torque T1 in the circumferential direction of the damping member 163a, and the torque T1 will drive the spring to rotate in the spiral direction. The force F2 will compress the damping member 163a. ​​In the process of the moving member 162 moving along the Y direction, the force F will be applied to multiple positions of the damping member 163a. ​​At this time, multiple torques T1 will also be generated on the circumferential side wall of the damping member 163a.

[0136] Figure 7 Indicated Figure 6 Schematic diagram of the structure of the middle damping member 163a undergoing lateral twisting deformation. Figure 7 Combined with Figure 6 As shown in FIG. 1 , during the process of opening and closing the foldable electronic device 100 multiple times, the damping member 163a will repeatedly expand and contract. After the damping member 163a has expanded and contracted multiple times, the damping member 163a will become unstable when compressed. When the instability occurs, the damping member 163a will move in the direction a (such as Figure 6 The resultant force of multiple torques T1 can be regarded as the destabilizing force that causes the damping member 163a to become destabilized. The destabilizing force is used to replace the resultant force of multiple torques T1 for description below.

[0137] It should be noted that the lateral direction of the damping member 163a can be understood as the radial direction of the damping member 163a, and therefore, the lateral distortion of the damping member 163a can be understood as the distortion of the damping member 163a in the radial direction. The radial direction of the damping member 163a includes but is not limited to a direction parallel to the a direction.

[0138] Since the damping member 163a is located on the side of the hinge mechanism 1 adjacent to the folding screen 4, if the damping member 163a is laterally twisted and deformed toward the side of the folding screen 4 when compressed, the damping member 163a may press the folding screen 4, causing light and shadow problems at the crease of the folding screen 4, affecting the user's viewing experience of the folding screen 4, and may even cause black spots, broken bright spots, etc. to appear on the folding screen 4, causing the folding screen 4 to fail.

[0139] It should be noted that the folding mark of the folding screen 4 is located in the bendable area 43 . Therefore, the light and shadow problem of the folding screen 4 can be understood as the light and shadow problem of the folding screen 4 at the folding mark of the bendable area 43 .

[0140] Therefore, how to prevent the damping member 163a from pressing the folding screen 4 during the compression process has become a technical problem to be solved.

[0141] One solution in the related art is to increase the diameter of the structural member so that the diameter of the structural member is close to the inner diameter of the damping member 163a (spring). Although this can prevent the damping member 163a from being lateral twisted and deformed when compressed to a certain extent, the outer diameter of the damping member 163a will increase after the damping member 163a is compressed, and the deformation direction or degree of the damping member 163a cannot be controlled. Therefore, it is difficult to avoid the damping member 163a pressing the folding screen 4 by increasing the diameter of the structural member. In addition, the increase in the diameter of the structural member will also increase the weight of the structural member and the hinge mechanism 1, which is contrary to the lightweight design of the hinge mechanism and the folding electronic device.

[0142] In view of this, the embodiment of the present application further provides a hinge mechanism 1. The hinge mechanism 1 also includes a structural member, a moving member, a fixed member and a damping member. The embodiment of the present application improves the structure of the moving member, the fixed member or the structural member. For example, the embodiment of the present application provides a receiving groove on at least one of the moving member and the fixed member so that the end of the damping member is disposed in the receiving groove, or a recessed surface is provided on the structural member to increase the gap between the damping member and the structural member. This can prevent the damping member from deforming toward one side of the folding screen 4 and pressing the folding screen 4 when compressed, thereby avoiding light and shadow and failure problems of the folding screen 4. At the same time, it will not conflict with the lightweight design of the hinge mechanism and the foldable electronic device.

[0143] The structure of the rotating shaft mechanism 1 is further described below in conjunction with the accompanying drawings and embodiments.

[0144] Figure 8 Schematic diagram of the structure of a damping assembly according to an embodiment of the present application. Figure 8 As shown, the damping assembly of the rotating shaft mechanism 1 also includes a damping unit 16 , similar to the related art. Figure 8 The damping assembly in the embodiment can be regarded as the first damping assembly. In the following, the embodiment of the present application also provides a second damping assembly, a third damping assembly, etc. In the following, the structure of the first damping assembly is further described.

[0145] Continue to see Figure 8As shown, in the first damping assembly, the damping unit 16 also includes a structural member 161, a moving member 162 and a damping member 163. In addition to these, the damping unit 16 also includes a fixing member 165. The structures of the structural member 161 and the moving member 162 can refer to the relevant description in the above-mentioned related technology, which will not be repeated here. Among them, the moving member 162 is sleeved on the circumferential outer side of the structural member 161. The moving member 162 can move relative to the structural member 161 along the Y direction. The Y direction is parallel to the axial direction of the structural member 161. The fixing member 165 includes a fixing portion 1651. The fixing portion 1651 is sleeved on the circumferential outer side of the structural member 161 and is relatively fixed to the structural member 161. Along the Y direction, the fixing portion 1651 and the moving member 162 are arranged at different positions of the structural member 161 to avoid the fixing portion 1651 and the moving member 162 from interfering with each other on the structural member 161. For example, along the Y direction, the fixed portion 1651 and the movable member 162 can be arranged at intervals on the structural member 161, so that the fixed portion 1651 and the movable member 162 are arranged at different positions of the structural member 161. Alternatively, along the Y direction, the fixed portion 1651 and the movable member 162 are arranged on the structural member 161 in sequence along the Y direction, and when the fixed portion 1651 and the movable member 162 are connected on the opposite sides, the fixed portion 1651 and the movable member 162 can also be arranged at different positions of the structural member 161.

[0146] It should be noted that the “A and B are relatively fixed” mentioned in this application can be understood as the positions of A and B are relatively fixed, and there will be no relative displacement between the two. For example, the “fixing portion 1651 and the structural member 161 are relatively fixed” mentioned above can be understood as the positions of the fixing portion 1651 and the structural member 161 are relatively fixed, and there will be no relative displacement between the two. In the following text, if there is a description similar to “A and B are relatively fixed”, it can be understood in this way.

[0147] In order to achieve the relative fixation between the fixing part 1651 and the structural member 161, the fixing part 165 and the structural member 161 can be installed on the shaft cover 11 and fixed relatively to the shaft cover 11, thereby ensuring that the positions of the fixing part 1651 and the structural member 161 are relatively fixed. The installation method of the structural member 161 on the shaft cover 11 can be determined according to the existing rotating shaft mechanism 1, and will not be further elaborated in this application. The installation of the fixing member 165 on the shaft cover 11 will be explained in conjunction with the corresponding drawings below, and will not be repeated here.

[0148] Fig. 9 Indicated Figure 8 Cross-section view in the AA direction. Fig. 9 As shown, at least one of the moving member 162 and the fixing portion 1651 is provided with a receiving groove 164 on the opposite side. Fig. 9The figure shows that the moving member 162 is provided with the receiving groove 164, which does not constitute a limitation on the structure of the damping unit 16. For example, the receiving groove 164 can also be provided on the fixing portion 1651, or the receiving groove 164 can also be provided on both the fixing portion 1651 and the moving member 162.

[0149] Continue to see Fig. 9 The damping member 163 is sleeved on the circumferential outer side of the structural member 161 and is located between the moving member 162 and the fixed portion 1651. It should be noted that the damping member 163 being located between the moving member 162 and the fixed portion 1651 may include but is not limited to being understood as, when along the Y direction, the damping member 163 is located in the middle area between the moving member 162 and the fixed portion 1651. The damping member 163 has two end portions 1631 in the Y direction.

[0150] The end 1631 adjacent to the receiving groove 164 is disposed in the receiving groove 164. For example, when the receiving groove 164 is only disposed on the moving member 162, the end 1631 of the damping member 163 adjacent to the moving member 162 is disposed in the receiving groove 164. For another example, when the receiving groove 164 is only disposed on the fixing portion 1651, the end 1631 of the damping member 163 adjacent to the fixing portion 1651 is disposed in the receiving groove 164. For another example, when the receiving groove 164 is disposed on both the fixing portion 1651 and the moving member 162, both ends 1631 of the damping member 163 are adjacent to one receiving groove 164, and at this time, both ends 1631 of the damping member 163 are respectively disposed in one receiving groove 164. Moreover, the opposite sides of the two ends 1631 are respectively connected to the moving member 162 and the structural member 161, and are relatively fixed.

[0151] In this way, when the moving member 162 moves toward one side of the damping member 163 in the Y direction, the damping member 163 can be compressed, so that the damping member 163 can generate force feedback to the user during the opening and closing process of the foldable electronic device 100, so that the user can feel the opening and closing of the foldable electronic device 100. Since the moving member 162 can move relative to the structural member 161 along the Y direction, the elastic force generated by the damping member 163 can also drive the moving member 162 to move toward the side away from the damping member 163 along the Y direction, so that the damping member 163 is stretched.

[0152] It should be noted that since the damping member 163 is sleeved on the axial outside of the structural member 161 and is located between the movable member 162 and the fixed portion 1651, the damping member 163 is extended and retracted in the axial direction of the structural member 161. At this time, the extension and retraction direction of the damping member 163 can be understood as the Y direction.

[0153] Fig.10 Schematically shows Fig. 9 Magnified view at B. See Fig.10As shown, on this basis, since the end 1631 of the damping member 163 adjacent to the receiving groove 164 is arranged in the receiving groove 164, the end 1631 of the damping member 163 can be wrapped in at least one of the moving member 162 and the fixed portion 1651. In this way, the receiving groove 164 can guide the expansion and contraction of the damping member 163, so that the damping member 163 can expand and contract in a predetermined direction, and the risk of instability of the damping member 163 when compressed can be reduced, so as to prevent the damping member 163 from being lateral twisted and deformed toward one side of the folding screen 4 when compressed and pressing the folding screen 4, thereby avoiding the problem of light shadow and failure of the folding screen 4.

[0154] Specifically, when the damping member 163 is compressed along the Y direction, if the damping member 163 is laterally twisted and deformed toward one side along the Z direction under the action of the destabilizing force T and contacts the groove wall of the receiving groove 164, the groove wall of the receiving groove 164 will apply a reaction force F' to the damping member 163, so that the damping member 163 is offset toward one side of the center of the receiving groove 164 along the Z direction under the reaction force F', which can reduce the risk of the damping member 163 becoming destabilized when being compressed. It should be noted that the Z direction can also be regarded as the radial direction of the damping member 163.

[0155] Since the present application does not need to increase the outer diameter of the structural member 161, the weight of the structural member 161 will not be increased. On the contrary, due to the setting of the accommodating groove 164, the weight of the movable member 162 or the fixed member 165 may be reduced. Therefore, the present application, through the setting of the accommodating groove 164, avoids the folding screen 4 from having light and shadow and failure problems due to the pressure of the damping member 163, while not increasing the weight of the hinge mechanism 1, so that the hinge mechanism 1 complies with the lightweight design of the hinge mechanism and the foldable electronic device.

[0156] Since the damping member 163 is the source of the hand-feeling force of the foldable electronic device 100 during the opening and closing process, the elastic force value of the damping member 163 is designed during the design process of the foldable electronic device 100 to ensure that the elastic force generated by the damping member 163 during the opening and closing process of the foldable electronic device 100 will generate force feedback to the user, so that the user has a more comfortable opening and closing hand feeling during the opening and closing process of the foldable electronic device 100. In this way, when the user opens and closes the foldable electronic device 100, the user can accurately judge whether the foldable electronic device 100 can achieve the switching between the folded state and the flattened state based on the opening and closing hand feeling.

[0157] If the damping member 163 becomes unstable, the attenuation of the elastic force of the damping member 163 will be accelerated, thereby affecting the user's opening and closing feel of the foldable electronic device 100, and further affecting the user's judgment on whether the foldable electronic device 100 can switch between the folded state and the unfolded state. At the same time, it may also cause the foldable electronic device 100 to not be tightly closed in the folded state, or not be unfolded in the flattened state.

[0158] Taking the elastic force value of the damping member 163 as 5N during the design process of the foldable electronic device 100, when the damping member 163 becomes unstable, the elastic force value of the damping member 163 may decay to 3N. At this time, when the user opens and closes the foldable electronic device 100, only 3N of force is needed to switch the foldable electronic device 100 between the folded state and the flattened state. The user's opening and closing feel will be reduced, and it is difficult to accurately judge whether the foldable electronic device 100 can switch between the folded state and the flattened state based on the opening and closing feel alone.

[0159] The present application solves the problem of light shadow and failure of the folding screen 4 due to the pressure of the damping member 163 by providing the receiving groove 164, and can also effectively prevent the damping member 163 from becoming unstable along the Z direction when it is compressed, especially when both the moving member 162 and the fixed member 165 are provided with the receiving groove 164, it can achieve a better effect of preventing the damping member 163 from becoming unstable along the Z direction. In this way, the service life of the damping member 163 can be extended, thereby extending the service life of the foldable electronic device 100.

[0160] See again Fig. 9 Along the Y direction, the fixed part 1651 and the movable part 162 are spaced apart on the structural part 161 so that the damping member 163 is sleeved on the circumferential outer side of the structural part 161. At the same time, the damping member 163 can also be located between the fixed part 1651 and the movable part 162 so that the damping member 163 can be connected between the fixed part 1651 and the movable part 162.

[0161] Continue to see Fig.10 In some embodiments, the accommodating groove 164 may be only provided on the movable member 162, and the accommodating groove 164 is not provided on the fixed portion 1651. At this time, the end 1631 of the damping member 163 adjacent to the movable member 162 may be provided in the accommodating groove 164 of the movable member 162, and connected to the movable member 162, and relatively fixed. The end 1631 of the damping member 163 adjacent to the fixed portion 1651 may be directly connected to the side of the fixed portion 1651 facing the movable member 162, and connected to the movable member 162, and relatively fixed. At this time, except for the part of the damping member 163 provided in the accommodating groove 164 of the movable member 162, all are exposed to the outside of the movable member 162. That is to say, the damping member 163 can be seen from the side of the shaft cover 11 facing the folding screen 4.

[0162] It should be noted that in this application, "B can be seen from one side of A" means that B can be seen when this side of A is not covered by other components, regardless of whether it can be seen in the whole machine environment or other application environments. For example, the above "the damping member 163 can be seen on the side of the shaft cover 11 facing the folding screen 4" can be understood as the damping member 163 can be seen when the folding screen 4 is not covered on the shaft cover 11. If there is a description similar to "B can be seen from one side of A" below, it can be understood in this way.

[0163] Fig.11 The schematic diagram shows a structure in which both the moving member 162 and the fixed portion 1651 are provided with a receiving groove 164. Fig.11 As shown, in other embodiments, the movable member 162 and the fixed portion 1651 may be provided with a receiving groove 164 on the opposite side. The two receiving grooves 164 are opposite in the Y direction and correspond to the two end portions 1631 one by one. That is to say, in the Y direction, the two receiving grooves 164 are arranged opposite to each other, and the two end portions 1631 are respectively provided with a receiving groove 164. The two end portions 1631 are respectively arranged in the corresponding receiving grooves 164, so that the two end portions 1631 can be respectively wrapped in the movable member 162 and the fixed portion 1651, so as to achieve a better effect of preventing the damping member 163 from becoming unstable along the Z direction.

[0164] Continue to see Fig.11 As shown, when both ends 1631 are disposed in the receiving groove 164, the portion of the damping member 163 between the two ends 1631 can be exposed outside the moving member 162 and the fixing portion 1651. The portion of the damping member 163 between the two ends 1631 can be referred to as the middle section of the damping member 163.

[0165] Alternatively, in some embodiments, the inner side wall 1642 of at least one accommodating groove 164 may also extend toward one side of the center of the damping member 163 along the Y direction, so that the notches of the two accommodating grooves 164 are connected. A portion of the damping member 163 is located in the moving member 162, and another portion is located in the fixed portion 1651. The damping member 163 may be completely covered by the moving member 162 and the fixed portion 1651, and the damping member 163 cannot be seen from the side of the shaft cover 11 facing the folding screen 4. At this time, the damping member 163 can also be understood as being located between the moving member 162 and the fixed portion 1651.

[0166] The structure of the rotating shaft mechanism 1 is further described below by taking the example that the receiving groove 164 is only provided on the moving member 162 .

[0167] See again Fig.10, the receiving groove 164 has a notch (not shown) and an inner bottom wall 1641. The end 1631 corresponding to the receiving groove 164 is arranged in the receiving groove 164 through the notch. For example, the end 1631 of the damping member 163 corresponding to the moving member 162 can be arranged in the receiving groove 164 of the moving member 162 through the notch. Along the Y direction, the side of the end 1631 away from the notch (the end face 1632 of the end 1631) is abutted or fixedly connected with the inner bottom wall 1641, so that the end 1631 of the damping member 163 can be arranged in the receiving groove 164 through the notch, and the end 1631 of the damping member 163 and the moving member 162 can be relatively fixed. Furthermore, since the side of the end 1631 away from the slot is abutted against or fixedly connected to the inner bottom wall 1641, when the movable member 162 moves in the Y direction, a force F is applied to the side of the end 1631 of the damping member 163 away from the slot at the inner bottom wall 1641, so as to ensure that the side of the end 1631 away from the slot can move toward the side of the fixed portion 1651 along the Y direction under the push of the force F, and the damping member 163 is compressed.

[0168] The side of the end 1631 away from the notch can be fixedly connected to the inner bottom wall 1641 by bonding, welding, etc. Compared with the fixed connection, when the side of the end 1631 away from the notch abuts against the inner bottom wall 1641, it is easy to replace the damping member 163. The following takes the side of the end 1631 away from the notch abutting against the inner bottom wall 1641 as an example to further explain the structure of the rotating shaft mechanism 1.

[0169] See again Fig.10 The receiving groove 164 has an inner wall 1642, and the inner wall 1642 is arranged on one side of the inner bottom wall 1641, and together with the inner bottom wall 1641, the receiving groove 164 is formed, and the side of the inner wall 1642 away from the inner bottom wall 1641 forms a notch, so that the end 1631 of the damping member 163 is arranged in the receiving groove 164 through the notch, and abuts or is fixedly connected to the inner bottom wall 1641.

[0170] When the end 1631 is arranged in the receiving groove 164, the inner wall 1642 blocks the circumferential outer wall of the end 1631 so that the end 1631 can be wrapped by the inner wall 1642 of the receiving groove 164. At the same time, the damping member 163 is laterally twisted and deformed toward one side along the Z direction under the action of the destabilizing force T and contacts the inner wall 1642 of the receiving groove 164. At this time, the inner wall 1642 will act as the groove wall of the receiving groove 164 to apply a reaction force F' to the damping member 163, so that the damping member 163 is offset to one side along the Z direction toward the center of the receiving groove 164 under the reaction force F', thereby reducing the risk of instability of the damping member 163 when being compressed.

[0171] See again Fig.10The inner bottom wall 1641 may have a hole (not shown) for passing the structural member 161 through. Along the Y direction, the hole is opposite to the notch, so that the notch and the hole will not be offset (misaligned) in the Y direction. In this way, the structural member 161 can pass through the notch and the hole along the Y direction, so that the moving member 162 can be sleeved on the circumferential outer side of the structural member 161. At the same time, the axial direction of the structural member 161 can be parallel to the Y direction to ensure that the moving member 162 can move along the Y direction and compress the damping member 163.

[0172] Since the spring is usually wound from a linear material such as spring steel, the spring is classified into a circular spring, a square spring or a rectangular spring according to the shape of the linear material at the end surface 1632. For a circular spring, the linear material is circular in shape at the end surface 1632. Correspondingly, for a square spring or a rectangular spring, the linear material is square or rectangular in shape at the end surface 1632, respectively. Fig.10 The damping member 163 shown in FIG. 1 is a square spring.

[0173] When the damping member 163 is a spring, in addition to the square spring, the damping member 163 may also include a circular spring or a rectangular spring. In this way, while ensuring that the damping member 163 can be extended and retracted along the Y direction, the structure of the damping member 163 can be made more diversified to meet the requirements of the rotating shaft mechanism 1 for different structures of the damping member 163.

[0174] The following first further describes the structure of the rotating shaft mechanism 1 when the damping member 163 is a square spring or a rectangular spring, and then further describes the structure of the rotating shaft mechanism 1 when the damping member 163 is a circular spring.

[0175] See again Fig.10 When the damping member 163 is a square spring or a rectangular spring, the two ends 1631 of the damping member 163 are respectively fitted with the moving member 162 and the structural member 161 and relatively fixed to ensure that the damping member 163 has a good fitting effect with the moving member 162 and the structural member 161 at the two ends 1631, so as to ensure the stable abutment between the end 1631 and the inner bottom wall 1641, so as to enhance the stability of the connection between the damping member 163 and the moving member 162 and the structural member 161.

[0176] The inner bottom wall 1641 is perpendicular to the Y direction. Since the end surface 1632 of the end 1631 of the square spring or rectangular spring is usually perpendicular to its own expansion and contraction direction, when the inner bottom wall 1641 is perpendicular to the Y direction and the end 1631 is arranged in the receiving groove 164, the end surface 1632 of the square spring or rectangular spring can be parallel to the inner bottom wall 1641, so that the end surface 1632 of the damping member 163 has a good fit with the inner bottom wall 1641, so as to ensure the stable contact between the damping member 163 and the inner bottom wall 1641.

[0177] For the fixing portion 1651 , the side of the fixing portion 1651 facing the moving member 162 may also be perpendicular to the Y direction to ensure that the end surface 1632 of the damping member 163 and the fixing portion 1651 have a good fit effect and achieve stable abutment between the damping member 163 and the fixing portion 1651 .

[0178] It should be noted that if the end face 1632 of the end 1631 of the square spring or the rectangular spring intersects with its own expansion and contraction direction, the side of the inner bottom wall 1641 or the fixed portion 1651 facing the movable part 162 may also intersect with the Y direction, so that the end face 1632 of the damping part 163 has a better fitting effect with the inner bottom wall 1641 and the fixed portion 1651.

[0179] See again Fig. 9 , when the inner side wall 1642 can extend toward one side of the center of the damping member 163 along the Y direction, the groove depth H of the receiving groove 164 can be increased. Since the end 1631 is wrapped by the receiving groove 164, the larger the groove depth H of the receiving groove 164 is, the larger the wrapping range of the damping member 163 will be, and the risk of the damping member 163 becoming unstable when being compressed can be further reduced. However, when the groove depth of the receiving groove 164 is larger, the length of the inner side wall 1642 will be larger. At this time, the inner side wall 1642 forms a thin wall of the receiving groove 164, and the thin wall of the receiving groove 164 will also be longer, so that the strength of the moving member 162 at the inner side wall 1642 is smaller, and the structural stability of the moving member 162 is poor.

[0180] For this reason, the groove depth H of the accommodating groove 164 can be less than or equal to one half of the total length L of the damping member 163. Wherein, the groove depth H and the length direction of the damping member 163 are parallel to the Y direction. In this way, while ensuring that the end 1631 is wrapped in the accommodating groove 164, it is possible to avoid the groove depth of the accommodating groove 164 being too large, so as to reduce the length of the thin arm on the moving member 162, and enhance the strength and structural stability of the moving member 162 at the inner side wall 1642. In addition, when the length of the thin arm on the moving member 162 is reduced, the weight of the moving member 162 can also be controlled within a smaller range, so as to avoid the weight of the moving member 162 from increasing, affecting the lightweight design of the rotating shaft mechanism 1.

[0181] It should be noted that within the range of the groove depth mentioned above, on the basis of ensuring the strength and structural stability of the moving member 162 at the inner side wall 1642, the groove depth H of the receiving groove 164 can be made as large as possible to further reduce the risk of instability of the damping member 163 when being compressed. In the present application, the minimum value of the groove depth H of the receiving groove 164 is not further limited.

[0182] See again Fig.10When the end portion 1631 is disposed in the receiving groove 164, there may be a gap between the circumferential outer wall of the end portion 1631 and the inner side wall 1642. If there is no gap between the circumferential outer wall of the end portion 1631 and the inner side wall 1642, it is not convenient for the end portion 1631 to be disposed in the receiving groove 164 through the notch. Therefore, by setting the gap between the circumferential outer wall of the end portion 1631 and the inner side wall 1642, it is convenient for the end portion 1631 to be disposed in the receiving groove 164 through the notch, so as to realize the assembly of the damping member 163 in the moving member 162.

[0183] Similarly, see again Fig.10 When the end 1631 is arranged in the accommodating groove 164, there is a gap between the circumferential inner wall of the end 1631 and the structural member 161, which can also facilitate the structural member 161 to be inserted into the damping member 163, so that the damping member 163 can be smoothly mounted on the circumferential outer side of the structural member 161.

[0184] In summary, the risk of the damping member 163 becoming unstable when compressed can be reduced by setting the accommodating groove 164. However, after the damping member 163 has been expanded and contracted multiple times, there is still a risk of becoming unstable and being pressed and folded when compressed.

[0185] In order to further prevent the damping member 163 from pressing the folding screen 4, causing light and shadow problems or failure of the folding screen 4, the embodiment of the present application also improves the shape of the structural member 161. By providing a concave surface 1611 on the structural member 161, the deformation direction of the damping member 163 can be guided when it is accidentally deformed and twisted laterally during multiple extensions and retractions, so that the damping member 163 can be deformed and twisted laterally toward the side (the second side 1634) away from the folding screen 4, so as to further prevent the damping member 163 from pressing the folding screen 4, causing light and shadow problems or failure of the folding screen 4.

[0186] The structure of the rotating shaft mechanism 1 will be further described below in conjunction with the accompanying drawings and embodiments.

[0187] Fig.12 Shows Figure 8 A partial schematic diagram of the damping assembly. Fig.12 As shown, the damping member 163 has a first side 1633 and a second side 1634 in the Z direction. The first side 1633 is configured to be disposed adjacent to the folding screen 4. Correspondingly, the second side 1634 is disposed adjacent to the shaft cover 11. The structural member 161 has a recessed surface 1611 on the circumferential side wall facing the first side 1633. Along the Z direction, the recessed surface 1611 is opposite to at least a portion of the damping member 163 to increase the gap between at least a portion of the damping member 163 and the structural member 161.

[0188] If the structural member 161 is provided with a recessed surface 1611 on the circumferential side wall of the first side 1633, the gap between at least part of the damping member 163 and the structural member 161 will be increased, and deformation space will be reserved for the damping member 163 to deform toward the second side 1634, and the support force of the structural member 161 on the damping member 163 at the recessed surface 1611 is smaller than that on the second side 1634. In this way, under the action of the destabilizing force, the damping member 163 can more easily overcome the support force of the structural member 161 on the damping member 163 on the first side 1633 and deform laterally toward the side (second side 1634) away from the folding screen 4, so that when the damping member 163 is deformed laterally under the action of the destabilizing force, it can deform toward the second side 1634, so as to further avoid the damping member 163 pressing the folding screen 4, causing the folding screen 4 to have light and shadow problems or failure.

[0189] See also Fig.12 As shown, part of the damping member 163 is exposed outside the moving member 162 and the fixing member 165, and along the Z direction, the recessed surface 1611 is opposite to the part of the damping member 163 exposed outside the moving member 162 and the fixing member 165. For example, along the Z direction, the recessed surface 1611 is opposite to the middle section of the damping member 163 and the end 1631 adjacent to the fixing portion 1651. In this way, while reducing the risk of instability of the damping member 163 when compressed through the recessed groove, the gap between the portion of the damping member 163 exposed outside the moving member 162 and the fixed member 165 and the structural member 161 can be increased through the recessed surface 1611 to ensure that when the damping member 163 is laterally twisted and deformed under the action of the instability force, the portion of the damping member 163 exposed outside the moving member 162 and the fixed member 165 can be deformed toward the second side 1634, so as to further avoid the damping member 163 pressing against the folding screen 4, causing light and shadow problems or failure of the folding screen 4.

[0190] It should be noted that, in some embodiments, along the Z direction, on the basis of being opposite to the middle section of the damping member 163 and the end 1631 adjacent to the fixed portion 1651, the recessed surface 1611 may also be opposite to at least a portion of the end 1631 of the damping member 163 disposed in the movable member 162.

[0191] Fig.13 Schematically shows a structural schematic diagram of a structural member 161 at a first viewing angle. Fig.13 Combined with Fig. 9As shown, the concave surface 1611 has a first projection in the Z direction. The length L1 of the first projection is greater than one quarter of the total length L of the damping member 163, and less than or equal to one half of the total length of the damping member 163. The length direction of the first projection is parallel to the Y direction. By limiting the length L1 of the first projection, the concave surface 1611 has a certain length in the Y direction to ensure that the concave surface 1611 can be opposite to more damping members 163 in the Z direction, thereby increasing the size of the deformation space in the Y direction to ensure that the damping member 163 can deform toward the second side 1634.

[0192] Continue to see Fig.13 , the recessed surface 1611 can be a horizontal surface or an arcuate surface. When the recessed surface 1611 is an arcuate surface, the recessed surface 1611 and the remaining circumferential side walls of the structural member 161 on the first side 1633 are smoothly connected. Compared with a horizontal surface, when the recessed surface 1611 is an arcuate surface, since the recessed surface 1611 and the remaining circumferential side walls of the structural member 161 on the first side 1633 are smoothly connected, it can prevent the damping member 163 from expanding and contracting in the Y direction or when the foldable electronic device 100 shakes or accidentally falls, the damping member 163 is stuck at the position where the recessed surface 1611 and the remaining circumferential side walls of the structural member 161 on the first side 1633 are connected, thereby ensuring the smoothness of the opening and closing of the foldable electronic device 100.

[0193] Continue to see Fig.13 , along the Y direction, a first assembly surface 1612 and a second assembly surface 1613 are also spaced apart on the circumferential side wall of the structural member 161. The moving member 162 is sleeved on the first assembly surface 1612, and the fixing portion 1651 is sleeved on the second assembly surface 1613. The recessed surface 1611 is located between the first assembly surface 1612 and the second assembly surface 1613, and is recessed on one side toward the center of the structural member 161 relative to the first assembly surface 1612 and the second assembly surface 1613. In this way, when the damping member 163 is sleeved on the circumferential outer side of the structural member 161 and is located between the moving member 162 and the fixing portion 1651, at least a portion of the damping member 163 can be opposite to the recessed surface 1611, thereby increasing the gap between at least a portion of the damping member 163 and the structural member 161.

[0194] Fig.14 Schematically shows Fig.13 A schematic diagram of the structure of the middle structural member 161 at a second viewing angle. Fig.14 Combined with Fig.13As shown, in some embodiments, the structural member 161 may further have a convex surface 1614 on the circumferential side wall facing the second side 1634. Along the Z direction, the convex surface 1614 is opposite to the concave surface 1611 to reduce the gap between the damping member 163 and the structural member 161. In this way, the support force of the structural member 161 on the convex surface 1614 on the second side 1634 on the damping member 163 can be increased, so that when the damping member 163 is laterally twisted and deformed under the action of the destabilizing force, it is easier to overcome the support force of the structural member 161 on the first side 1633 on the damping member 163 and deform toward the second side 1634, so as to further avoid the damping member 163 pressing the folding screen 4, causing the folding screen 4 to have light and shadow problems or failure.

[0195] Continue to see Fig.14 As described above, the concave surface 1611 has a first projection in the Z direction. The convex surface 1614 has a second projection in the Z direction. The length L2 of the second projection matches the length L1 of the first projection, that is, the length L2 of the second projection is the same as or close to the length L1 of the first projection. Among them, the length directions of the first projection and the second projection are parallel to the Y direction. By limiting the length L2 of the second projection, the convex surface 1614 has a certain length in the Y direction, so as to ensure that the convex surface 1614 can be opposite to more damping members 163 in the Z direction, so as to reduce the gap between more parts of the damping members 163 in the Y direction and the structural member 161, so that the structural member 161 has a greater supporting force on more damping members 163 at the convex surface 1614, so as to ensure that the damping members 163 can deform toward the second side 1634.

[0196] The raised surface 1614 may be an arcuate surface or a horizontal surface. When the raised surface 1614 is an arcuate surface, the raised surface 1614 is smoothly connected to the remaining circumferential side walls of the structural member 161 on the second side 1634. Compared with a horizontal surface, when the raised surface 1614 is an arcuate surface, since the raised surface 1614 is smoothly connected to the remaining circumferential side walls of the structural member 161 on the second side 1634, it is possible to prevent the damping member 163 from expanding and contracting in the Y direction or when the foldable electronic device 100 shakes or accidentally falls, the damping member 163 is stuck at the position where the recessed surface 1611 is connected to the remaining circumferential side walls of the structural member 161 on the second side 1634, thereby ensuring the smooth opening and closing of the foldable electronic device 100.

[0197] Fig.15 The exploded view of the first damping assembly is schematically shown. Fig.15 As described above, the shaft mechanism 1 may include a shaft cover 11 and a damping assembly, wherein the damping assembly includes two damping units 16, and the two damping units 16 are located on both sides of the shaft cover 11 in the X direction. Fig.15As shown, the moving parts 162 of the two damping units 16 are connected. For example, the two moving parts 162 can be connected by a connecting arm. The connecting arm is located between the two structural members 161. The two damping units 16 share a fixing member 165. The fixing member 165 includes two fixing portions 1651, and the two fixing portions 1651 are respectively sleeved on the circumferential outer sides of the two structural members 161, so that the two damping units 16 can share a fixing member 165, so that the two ends 1631 of the two damping members 163 on the same side can be respectively fixed by the two fixing portions 1651 of the fixing member 165.

[0198] Furthermore, since the moving parts 162 of the two damping units 16 are connected, the two moving parts 162 can be synchronously moved toward one side of the damping part 163 along the Y direction, so that the two damping parts 163 are synchronously compressed. Alternatively, the two damping parts 163 can also drive the corresponding moving parts 162 to move toward the side away from the damping part 163 along the Y direction under the action of the rebound force, so that the two moving parts 162 are synchronously stretched. In this way, the consistency of the expansion and contraction of the two damping parts 163 in their own expansion and contraction directions can be ensured, and a larger force value feedback can be generated to the user during the opening and closing process of the foldable electronic device 100, so that the user has a more comfortable opening and closing feel during the opening and closing process of the foldable electronic device 100.

[0199] It should be noted that the setting position of the damping assembly on the shaft cover 11 can be found in the relevant description above and will not be repeated here.

[0200] Continue to see Fig.15 , the fixing member 165 is fixedly connected to the shaft cover 11. Specifically, the fixing member 165 includes a locking portion 1652, and the locking portion 1652 is fixedly connected to the shaft cover 11 to achieve the installation and fixation of the fixing member 165 on the shaft cover 11. For example, the locking portion 1652 can be fixedly connected to the shaft cover 11 by fasteners such as screws and bolts. Along the X direction, the locking portion 1652 is arranged between the two structural members 161. The two fixing portions 1651 are connected to both sides of the locking portion 1652 in the X direction, so that the two fixing portions 1651 can be sleeved on the circumferential outer sides of the two structural members 161.

[0201] The rotating shaft mechanism 1 may further include two mounting groups 166, and each structural member 161 is provided with a mounting group 166. The mounting group 166 is located on the side of the fixing member 165 away from the damping member 163 in the Y direction, and at the same time, the fixing portion 1651 abuts against the mounting group 166. The mounting group 166 includes a retaining spring 1662 and a plurality of mounting plates 1661, and the plurality of mounting plates 1661 include a friction plate. The plurality of mounting plates 1661 and the retaining spring 1662 may be sequentially sleeved and fixed on the structural member 161, and the retaining spring 1662 is clamped on the end 1631 of the structural member 161. The mounting plate 1661 away from the damping member 163 is fixed to the structural member 161 by means of structures such as the retaining spring 1662, so that each mounting plate 1661 in the mounting group 166 is fixed to the structural member 161. The mounting piece 1661 adjacent to the fixing portion 1651 abuts against the fixing portion 1651 to fix the fixing member 165 on the structural member 161, thereby achieving fixation of the fixing member 165 on the structural member 161. Some mounting pieces 1661 of the two mounting groups 166 may be connected in the X direction.

[0202] Continue to see Fig.15 Combined with Figure 8 , the damping assembly can also include two synchronous swing arms 167. The two synchronous swing arms 167 are rotatably arranged on both sides of the shaft cover 11 in the X direction, and the two synchronous swing arms 167 can rotate synchronously toward the opposite or opposite sides relative to the shaft cover 11. A synchronous swing arm 167 is respectively correspondingly provided on the side of the two moving members 162 away from the damping member 163, and the moving members 162 are meshed with the corresponding synchronous swing arms 167. The synchronous swing arm 167 is constructed to drive the meshed moving member 162 to move toward one side of the damping member 163 along the Y direction when rotating relative to the shaft cover 11. In this way, when the two synchronous swing arms 167 rotate synchronously, the corresponding moving member 162 can be driven to move toward one side of the damping member 163 along the Y direction relative to the structural member 161, thereby realizing the synchronous compression of the two damping members 163 in the Y direction. In addition, the synchronous swing arm 167 can also replace the damping swing arm in the traditional rotating shaft mechanism 1 to simplify the structure of the rotating shaft mechanism 1. The structure of the synchronous swing arm 167 and the connecting frame 12 can refer to the relevant description of the damping swing arm above, which will not be repeated here.

[0203] Continue to see Fig.15 Combined with Figure 8Specifically, the synchronous swing arm 167 can be sleeved on the structural member 161. The synchronous swing arm 167 has a push-up cam 1671, and the push-up cam 1671 is sleeved on the structural member 161. The movable member 162 has a guide cam on the side facing the push-up cam 1671. The guide cam is engaged with the push-up cam 1671. During the opening and closing process of the foldable electronic device 100, the synchronous swing arm 167 rotates relative to the shaft cover 11. At this time, the push-up cam 1671 rotates around the structural member 161 and drives the guide cam to move relative to the structural member 161 along the Y direction, thereby driving the movable member 162 to move relative to the structural member 161 along the Y direction.

[0204] The guide cam and the ejection cam 1671 are provided with engagement grooves 168 and engagement protrusions 169 arranged at intervals along the circumferential direction, and the engagement groove 168 of one of the guide cam and the ejection cam 1671 is engaged with the engagement protrusion 169 of the other. In this way, when the ejection cam 1671 rotates relative to the shaft cover 11 along with the synchronous swing arm 167, the engagement protrusion 169 of the ejection cam 1671 will be disengaged from one engagement groove 168 of the guide cam and move into the next engagement groove 168 of the guide cam. When the ejection cam 1671 is disengaged from one engagement groove 168 of the guide cam, the guide cam will be driven to move toward one side of the damping member 163 along the Y direction, thereby compressing the damping member 163. Correspondingly, in the process of the ejection cam 1671 re-entering the next engagement groove 168 of the guide cam, the damping member 163 releases the elastic force and can push the guide cam to move along the Y direction toward one side of the ejection cam 1671 so that the guide cam and the ejection cam 1671 re-engage.

[0205] The synchronous swing arm 167 can be sleeved on the first assembly surface 1612 and have a clearance fit with the first assembly surface 1612, so that the synchronous swing arm 167 can be rotated relative to the structural member 161 while being sleeved on the structural member 161. In this way, the synchronous swing arm 167 can also be rotated on the shaft cover 11 through the structural member 161. The structural member 161 can be fixed on the shaft cover 11 and fixed relative to the shaft cover 11, that is, the structural member 161 does not rotate relative to the shaft cover 11 to ensure that the concave surface 1611 always faces the folding screen 4.

[0206] Continue to see Fig.15 Combined with Figure 8, the damping assembly may further include a synchronous gear set. The synchronous gear set is disposed between the two synchronous swing arms 167 and meshes with the synchronous swing arms 167 at the same time. The synchronous gear set includes an even number of synchronous gears 17 that are sequentially arranged and meshed with each other along the X direction. The synchronous gear 17 can be rotatably disposed on the shaft cover 11 via a rotating shaft 18. The rotating shaft 18 can pass through the connecting arms of the two moving members 162 and be inserted into the locking portion 1652 so as to fix the rotating shaft 18 and the connecting arms on the shaft cover 11 via the locking portion 1652. The two synchronous gears 17 located at the outermost sides of the synchronous gear set can respectively mesh with the two synchronous swing arms 167. The synchronous reverse rotation of the two synchronous swing arms 167 can be achieved through the synchronous gear set to achieve the switching of the foldable electronic device 100 between the folded state and the flattened state.

[0207] The following takes the synchronous gear set including two synchronous gears 17 as an example to further explain that the two synchronous swing arms 167 rotate synchronously and in opposite directions under the transmission of the synchronous gear set. For the convenience of description, the two synchronous swing arms 167 are respectively defined as the first synchronous swing arm 167a and the second synchronous swing arm 167b, the synchronous gear 17 meshing with the first synchronous swing arm 167a is called the first synchronous gear, and the synchronous gear 17 meshing with the second synchronous swing arm 167b is called the second synchronous gear.

[0208] See again Figure 8 , the first synchronous swing arm 167a is around the structural member 161 along w + When the gear rotates in the direction of rotation, it will drive the first synchronous gear to move synchronously along w - When the first synchronous gear rotates, it will drive the second synchronous gear to rotate synchronously along w + When the second synchronous gear rotates, it will drive the second synchronous swing arm 167b to rotate synchronously along w - Direction of rotation. + Direction and w - The directions are opposite to each other, so the synchronous reverse rotation of the two synchronous swing arms 167 can be achieved through the synchronous gear set.

[0209] It should be noted that, in some embodiments, the two synchronous swing arms 167 may also be provided with other non-synchronous gear sets to achieve synchronous reverse rotation of the two synchronous swing arms 167. For example, the non-synchronous gear set may be a synchronous slider or the like.

[0210] Continue to see Fig.15 Combined with Figure 8The two synchronous swing arms 167 can be fixed to the corresponding structural member 161 through the same fixing plate 15 to prevent the synchronous swing arms 167 from being disengaged from the structural member 161 along the Y direction when rotating around the structural member 161. At the same time, the fixing plate 15 can also be fixed to the same side of each synchronous gear 17 in the Y direction to prevent the synchronous swing arms 167 from being disengaged from the rotating shaft 18 along the Y direction when rotating.

[0211] Fig.16 The internal schematic diagram of the second damping assembly is schematically shown. The difference from the first damping assembly is that, in the second damping assembly, no receiving groove 164 is provided on the movable member 162 and the fixed portion 1651. In this way, only by providing the recessed surface 1611, or the recessed surface 1611 and the raised surface 1614 on the structural member 161, it is still possible to avoid the damping member 163 from pressing the folding screen 4 due to instability, causing light and shadow problems or failure of the folding screen 4. At this time, the end faces 1632 of the two end portions 1631 of the damping member 163 can be respectively abutted or fixedly connected with the two facing surfaces of the movable member 162 and the fixed portion 1651.

[0212] Fig.17 A partial internal schematic diagram of a third damping component is schematically shown. Fig.17 Only the assembly structure of the damping member 163 in the receiving groove 164 of the moving member 162 and the receiving groove 164 of the fixing portion 1651 is shown. Fig.17 As shown, the difference from the first damping assembly is that in the third damping assembly, the damping member 163 is only a circular spring, and the inner bottom wall 1641 of the receiving groove 164 is provided with an arc-shaped protrusion 1643. The difference of the third damping assembly is further described below in conjunction with the accompanying drawings.

[0213] If in the third damping assembly, since the end 1631 of the damping member 163 directly abuts against the inner bottom wall 1641 of the accommodating groove 164, the fit between the end 1631 of the damping member 163 and the inner bottom wall 1641 is poor, positional displacement is likely to occur during the compression process.

[0214] For this purpose, see Fig.17In the third damping assembly, an arc-shaped protrusion 1643 is provided on the inner bottom wall 1641 of the receiving groove 164 so as to form a raised arc surface on the inner bottom wall 1641. Specifically, the arc-shaped protrusion 1643 can be provided on the inner bottom wall 1641 of the receiving groove 164 of the moving member 162. The arc-shaped protrusion 1643 is located within the projection range of the damping member 163 on the inner bottom wall 1641, and the circumferential inner wall of the end 1631 is tangent to and in contact with the arc-shaped protrusion 1643. The tangent point between the circumferential inner wall of the end 1631 and the arc-shaped protrusion 1643 is P. The tangent angle between the circumferential inner wall of the end 1631 and the arc-shaped protrusion 1643 matches the helix angle of the damping member 163. In other words, the tangent angle between the circumferential inner wall of the end 1631 and the arc-shaped protrusion 1643 is the same as or similar to the helix angle of the damping member 163.

[0215] Continue to see Fig.17 Combined with Figure 6 , when the moving member 162 moves toward one side of the damping member 163 along the Y direction, the arc surface formed by the arc-shaped protrusion 1643 will exert an oblique force F on the damping member 163, and the force F will be set at an angle β with the Y direction, and the reverse extension line of the force F passes through the tangent point P and the center of the circle where the arc surface is located. The angle between the force F and the Y direction can be regarded as the tangent angle between the circumferential inner wall of the end 1631 and the arc-shaped protrusion 1643.

[0216] Furthermore, since the forces F2 and F1 mentioned above are decomposed at the helical angle α in the helical direction of the damping member 163 (spring), when the tangent angle mentioned above is closer to the helical angle α of the damping member 163, it means that the angle β is closer to the helical angle α of the damping member 163. At this time, the angle between the force F applied by the arc surface and the force F2 will gradually decrease, the force F1 will be smaller, and the resultant force (destabilizing force) of multiple forces F1 will also be smaller. When the tangent angle mentioned above is equal to the helical angle α of the damping member 163, the force F applied by the arc surface will coincide with the force F2. At this time, there is no need to decompose the force F, the force F1 is zero, and the destabilizing force will also be zero.

[0217] Therefore, by setting the arc-shaped protrusion 1643, it can cooperate with the accommodating groove 164 to further prevent the damping member 163 from pressing the folding screen 4 due to instability, thereby causing light and shadow problems or failure of the folding screen 4.

[0218] The folding screen 4 is located on the side of the hinge mechanism 1 where the damping member 163 is located, and connects the first middle frame 21 and the second middle frame 22 to prevent the damping member 163 from pressing the folding screen 4 due to instability, causing light and shadow problems or failure of the folding screen 4.

[0219] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0220] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A rotating shaft mechanism, characterized in that: A damping unit is included, wherein the damping unit comprises: Structural parts; A moving member, sleeved on the circumferential outer side of the structural member, the moving member can move relative to the structural member along a first direction, and the first direction is parallel to the axial direction of the structural member; A fixing member, comprising a fixing portion, the fixing portion being sleeved on the circumferential outer side of the structural member and being fixed relative to the structural member; along the first direction, the fixing portion and the moving member are arranged at different positions of the structural member; at least one of the moving member and the fixing portion is provided with a receiving groove on a side facing each other; A damping member is sleeved on the circumferential outer side of the structural member and is located between the movable member and the fixed portion; the damping member has two ends in the first direction, the end adjacent to the accommodating groove is arranged in the accommodating groove, and the two ends are respectively connected to the movable member and the structural member on opposite sides and are relatively fixed.

2. The rotating shaft mechanism according to claim 1, characterized in that: The receiving groove has a notch and an inner bottom wall, the end portion corresponding to the receiving groove is arranged in the receiving groove through the notch, and along the first direction, the side of the end portion away from the notch is abutted or fixedly connected to the inner bottom wall.

3. The rotating shaft mechanism according to claim 2, characterized in that: The receiving groove has an inner side wall, the inner side wall is arranged on one side of the inner bottom wall, and together with the inner bottom wall, the receiving groove is formed, and the side of the inner side wall away from the inner bottom wall forms the notch; When the end portion is disposed in the accommodating groove, the inner side wall blocks the circumferential outer wall of the end portion.

4. The rotating shaft mechanism according to claim 3, characterized in that: The groove depth of the accommodating groove is less than half of the total length of the damping member, and the groove depth of the accommodating groove and the length direction of the damping member are both parallel to the first direction.

5. The rotating shaft mechanism according to claim 3, characterized in that: When the end portion is disposed in the receiving groove: There is a gap between the circumferential outer wall of the end portion and the inner side wall, and / or there is a gap between the circumferential inner wall of the end portion and the structural member.

6. The rotating shaft mechanism according to claim 2, characterized in that: The inner bottom wall may have a penetration hole for penetrating the structural member, and along the first direction, the penetration hole is opposite to the notch, and the inner bottom wall is perpendicular to the first direction.

7. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The movable part and the fixed part are both provided with the accommodating groove on the opposite sides; The two receiving grooves are opposite to each other in the first direction and correspond to the two end portions one by one; the two end portions are respectively arranged in the corresponding receiving grooves.

8. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The damping member has a first side and a second side in the second direction, and the first side is configured to be disposed adjacent to the folding screen; The structural member has a concave surface on a circumferential side wall facing the first side, and along the second direction, the concave surface is opposite to at least a portion of the damping member to increase the gap between the damping member and the structural member; The second direction is perpendicular to the first direction.

9. The rotating shaft mechanism according to claim 8, characterized in that: Part of the damping member is exposed outside the moving member and the fixed member, and along the second direction, the concave surface is opposite to the part of the damping member exposed outside the moving member and the fixed member.

10. The rotating shaft mechanism according to claim 9, characterized in that: The concave surface has a first projection in the second direction, and the length of the first projection is greater than one quarter of the total length of the damping member and less than or equal to one half of the total length of the damping member; Wherein, the length direction of the first projection is parallel to the first direction.

11. The rotating shaft mechanism according to claim 8, characterized in that: The concave surface is an arc-shaped surface, and the concave surface is smoothly connected to the remaining circumferential side walls of the structural component on the first side.

12. The rotating shaft mechanism according to claim 8, characterized in that: Along the first direction, a first assembly surface and a second assembly surface are provided on the circumferential side wall of the structural member at intervals, the movable member is sleeved on the first assembly surface, and the fixed part is sleeved on the second assembly surface; The recessed surface is located between the first assembly surface and the second assembly surface, and is recessed on a side facing the center of the structural component relative to the first assembly surface and the second assembly surface.

13. The rotating shaft mechanism according to claim 8, characterized in that: The structural member has a convex surface on a circumferential side wall facing the second side; Along the second direction, the convex surface is opposite to the concave surface to reduce the gap between the damping member and the structural member.

14. The rotating shaft mechanism according to claim 13, characterized in that: The concave surface has a first projection in the second direction, and the convex surface has a second projection in the second direction; The length of the second projection matches the length of the first projection; The length directions of the first projection and the second projection are both parallel to the first direction.

15. The rotating shaft mechanism according to claim 13, characterized in that: The convex surface is an arc-shaped surface, and the convex surface is smoothly connected to the remaining circumferential side walls of the structural component on the second side.

16. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The damping member includes a spring, and the damping member includes a circular spring, a square spring or a rectangular spring; when the damping member is a square spring or a rectangular spring, the two ends facing away from each other are respectively in contact with the moving member and the structural member and are relatively fixed; or, When the damping member is a circular spring, the inner bottom wall of the accommodating groove is provided with an arc-shaped protrusion; The arc-shaped protrusion is located within the projection range of the damping member on the inner bottom wall, and the circumferential inner wall of the end portion is tangent to and in contact with the arc-shaped protrusion; the tangent angle between the circumferential inner wall of the end portion and the arc-shaped protrusion matches the helix angle of the damping member.

17. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The rotating shaft mechanism comprises a shaft cover and a damping assembly, and the damping assembly comprises two damping units; The two damping units are located on both sides of the shaft cover in the third direction, and the moving parts of the two damping units are connected, and the two damping units share one fixing part, and the fixing part includes two fixing parts, and the two fixing parts are respectively sleeved on the circumferential outer sides of the two structural parts; Wherein, the third direction is the width direction of the shaft cover and is perpendicular to the first direction; The fixing member is fixedly connected to the shaft cover.

18. The rotating shaft mechanism according to claim 17, characterized in that: The damping assembly further comprises two synchronous swing arms, which are rotatably arranged on both sides of the shaft cover in the third direction, and the two synchronous swing arms can synchronously rotate toward the opposite side or the opposite side relative to the shaft cover; A synchronous swing arm is respectively provided on one side of the two moving parts away from the damping part, and the moving parts are meshed with the corresponding synchronous swing arms; the synchronous swing arms are constructed to drive the meshed moving parts to move along the first direction toward one side of the damping part when rotating relative to the shaft cover.

19. A rotating shaft mechanism, characterized in that: A damping unit is included, wherein the damping unit comprises: Structural parts; A moving member, sleeved on the circumferential outer side of the structural member, the moving member can move relative to the structural member along a first direction, and the first direction is parallel to the axial direction of the structural member; A fixing member, comprising a fixing portion, wherein the fixing portion is sleeved on the circumferential outer side of the structural member and is relatively fixed to the structural member; along the first direction, the fixing portion and the moving member are arranged at different positions of the structural member; A damping member, which is sleeved on the circumferential outer side of the structural member and is located between the moving member and the fixed portion, wherein the damping member has two ends in the first direction, and the two ends are respectively connected to the moving member and the structural member on opposite sides and are relatively fixed; The damping member has a first side and a second side in the second direction, and the first side is configured to be disposed adjacent to the folding screen; Wherein, the structural member has a recessed surface on the circumferential side wall facing the first side, and along the second direction, the recessed surface is opposite to at least part of the damping member to increase the gap between at least part of the damping member and the structural member; the second direction is perpendicular to the first direction.

20. A foldable electronic device, characterized in that: It comprises a first middle frame, a second middle frame, a folding screen, and a hinge mechanism according to any one of claims 1 to 18 or claim 19, wherein the hinge mechanism is connected between the first middle frame and the second middle frame; The folding screen is located on the side of the hinge mechanism where the damping member is located, and connects the first middle frame and the second middle frame.

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