Rotating shaft mechanism and foldable terminal device

Abstract

The present application relates to a rotating shaft mechanism and a foldable terminal device, comprising a rotating shaft base, a shaft cover assembly, a rotating shaft, an eccentric part and a limiting member. The shaft cover assembly is arranged on one side of the rotating shaft base along the thickness direction of the rotating shaft base, and the shaft cover assembly is provided with a receiving groove. The rotating shaft is rotatably arranged on the rotating shaft base. The eccentric part is fixedly arranged at one end of the rotating shaft, and the eccentric part deviates from the axis of the rotating shaft. The eccentric part is rotatably arranged in the receiving groove and is in clearance fit with the receiving groove. When the rotating shaft rotates, the shaft cover assembly is driven to move along the thickness direction of the rotating shaft base by the eccentric part. The limiting member is at least partially located in the receiving groove. The limiting member is used to abut against the eccentric part during rotation. When the eccentric part rotates, the limiting member can at least fill the gap between the receiving groove and the eccentric part, and the eccentric part can limit the rotation or displacement of the limiting member relative to the inner wall of the receiving groove when the eccentric part rotates, thereby reducing abnormal noise.

Description

Technical Field

[0001] The present application relates to a hinge mechanism and a foldable terminal device. Background Art

[0002] Foldable terminal devices have two postures: unfolded and folded. Among them, the hinge mechanism is an important component to realize the unfolding and folding of foldable terminal devices. In the process of bidirectional switching of the foldable terminal device from the unfolded state to the folded state, the internal transmission mechanism of the hinge mechanism is prone to problems during transmission, which not only affects the user experience, but also reduces the life of the parts. Summary of the invention

[0003] The embodiments of the present application provide a hinge mechanism and a foldable terminal device, which are used to solve the problem of abnormal noise caused by collision between parts when the hinge mechanism rotates.

[0004] The embodiment of the present application provides a rotating shaft mechanism, including a rotating shaft base, a shaft cover assembly, a rotating shaft, an eccentric portion and a limiting member. The shaft cover assembly is arranged on one side of the rotating shaft base along the thickness direction of the rotating shaft base, and the shaft cover assembly is provided with a receiving groove. The rotating shaft is rotatably arranged on the rotating shaft base. The eccentric portion is fixedly arranged at one end of the rotating shaft, and the eccentric portion deviates from the axis of the rotating shaft. The eccentric portion is rotatably arranged in the receiving groove and is clearance-matched with the receiving groove. When the rotating shaft rotates, the shaft cover assembly is driven to move along the thickness direction of the rotating shaft base by the eccentric portion. The limiting member is at least partially located in the receiving groove. The limiting member is used to abut against the eccentric portion during rotation.

[0005] In this embodiment, when the rotating shaft rotates, it can drive the eccentric part to rotate around the axis of the rotating shaft in the receiving groove. The rotation of the eccentric part can drive the shaft cover assembly to move along the thickness direction of the rotating shaft base. Since the limiting member is at least partially located in the receiving groove, and the eccentric part can abut against the eccentric part when the eccentric part rotates. Therefore, when the eccentric part rotates, the limiting member can at least fill the gap between the receiving groove and the eccentric part, and the eccentric part can limit the rotation or displacement of the limiting member relative to the inner wall of the receiving groove when the eccentric part rotates, thereby reducing abnormal noise.

[0006] In one embodiment, the limiting member includes a first limiting layer, the first limiting layer is arranged on the inner wall of the accommodating groove, and the eccentric portion abuts against the first limiting layer.

[0007] In this embodiment, the first limiting layer can be laid on the inner wall of the accommodating groove and can occupy a larger area, so the eccentric part can have a larger contact area with the inner wall of the accommodating groove, thereby enhancing the stability of the eccentric part when rotating in the accommodating groove.

[0008] In one embodiment, the shaft cover assembly includes a relatively fixed lifting block and a shaft cover, the shaft cover is arranged on a side of the lifting block away from the rotating shaft base, and the lifting block is provided with a receiving groove. Therefore, when the shaft cover assembly moves along the thickness direction of the rotating shaft base, the lifting block drives the shaft cover to move. The lifting block is used as the setting position of the receiving groove.

[0009] In one embodiment, the limiting member further includes a second limiting layer and a connecting portion, the second limiting layer is arranged on the outer wall of the lifting block, the inner wall of the accommodating groove is opposite to the outer wall of the lifting block, and the first limiting layer and the second limiting layer are connected by the connecting portion.

[0010] In this embodiment, the first limiting layer and the second limiting layer are sandwiched between the inner wall of the receiving groove and the outer wall of the lifting block, thereby preventing the first limiting layer from falling off from the receiving groove due to sliding friction when the eccentric part rotates.

[0011] In one embodiment, the lifting block includes a bottom plate and a first side plate. The bottom plate and the first side plate surround and form at least a portion of the receiving groove. The entrance of the receiving groove is opposite to the bottom plate, and the plane where the first side plate is located extends along the axis of the rotating shaft. The first limiting layer is located on the surface of the first side plate facing the inside of the receiving groove, and the second limiting layer is located on the surface of the first side plate away from the inside of the receiving groove. The connecting portion connects the first limiting layer and the second limiting layer through the entrance of the receiving groove.

[0012] In this embodiment, the first limiting layer and the second limiting layer are respectively clamped on two surfaces of the first side plate. The first limiting layer can abut against the side wall of the limiting member, thereby increasing the contact area between the first limiting layer and the limiting member.

[0013] In one embodiment, the first limiting layer is provided with a protruding structure protruding toward the accommodating groove, and the protruding structure abuts against the eccentric portion.

[0014] In this embodiment, the protruding structure may have a certain elasticity, so it can play a buffering role on the eccentric column when the eccentric column shakes.

[0015] In one embodiment, the protruding structure is disposed in the middle of the first limiting layer. Both ends of the first limiting layer are respectively in contact with the surface of the first side plate facing the receiving groove.

[0016] In this embodiment, when the protruding structure is squeezed by the eccentric column, the force can be transmitted to the first side plate through the two ends of the first limiting layer.

[0017] In one embodiment, the protruding structure is located at one end of the first limiting layer close to the bottom plate.

[0018] In this embodiment, the protruding structure is arranged at one end of the first limiting layer close to the bottom plate, which can enhance the limitation on the end of the limiting member and avoid the collision between the limiting member and the bottom of the accommodating groove.

[0019] In one embodiment, the lifting block includes a second side plate and a third side plate. The planes where the second side plate and the third side plate are located extend along the axis of the rotating shaft and are respectively located at opposite ends of the first side plate. The bottom plate, the first side plate, the second side plate and the third side plate surround and form at least part of the accommodating groove. The first side plate, the second side plate and the third side plate surround the outer wall of the lifting block to form a first limiting groove, and the second limiting layer is located in the first limiting groove.

[0020] In this embodiment, the first limiting groove is formed by the bottom plate, the first side plate, the second side plate and the third side plate. The structure is simple and can limit the position of the second limiting layer to prevent the second limiting layer from falling off the outer wall of the lifting block.

[0021] In one embodiment, the first side plate, the second side plate and the third side plate surround the inner wall of the accommodating groove to form a second limiting groove, and the first limiting layer is located in the second limiting groove.

[0022] In this embodiment, the second limiting groove is formed by the bottom plate, the first side plate, the second side plate and the third side plate. The structure is simple and can limit the position of the first limiting layer to prevent the first limiting layer from falling off the inner wall of the accommodating groove.

[0023] In one embodiment, the lifting block includes a bottom plate, a first side plate and a fourth side plate. The entrance of the receiving groove is opposite to the bottom plate. The plane where the first side plate is located and the plane where the fourth side plate is located extend along the axis of the rotating shaft. The fourth side plate is opposite to the first side plate. The bottom plate, the first side plate and the fourth side plate surround and form at least part of the receiving groove. The first limiting layer is located on the surface of the bottom plate facing the inside of the receiving groove, and the second limiting layer is located on the surface of the bottom plate away from the inside of the receiving groove. The connecting portion connects the first limiting layer and the second limiting layer through an opening located between the first side plate and the fourth side plate.

[0024] In this embodiment, the first limiting layer and the second limiting layer are clamped on both sides of the bottom plate, and the second limiting layer is limited to the bottom wall of the receiving groove, which can reduce the collision of the limiting member with the bottom wall of the receiving groove and reduce abnormal noise.

[0025] In one embodiment, the first limiting layer, the connecting portion and the second limiting layer are integrally formed to enhance the overall strength of the limiting member.

[0026] In one embodiment, the first limiting layer, the connecting portion and the second limiting layer are metal sheets, so the limiting member has a certain toughness and elasticity, and can buffer the eccentric portion to avoid damage to the eccentric portion caused by hard contact.

[0027] In one embodiment, the first limiting layer, the second limiting layer and the connecting layer are formed on the lifting block by injection molding, which has a simple process and low cost, and can effectively match the size of the lifting block.

[0028] In one embodiment, the inner wall of the receiving groove includes a bottom wall and a side wall, wherein the bottom wall of the receiving groove is opposite to the entrance of the receiving groove, and the side wall extends along the axis of the rotating shaft. The first limiting layer is disposed on the bottom wall of the receiving groove.

[0029] In one embodiment, the bottom wall of the receiving groove is provided with two limiting steps, and the first limiting layer is sandwiched between the two limiting steps. The space between the two limiting steps can be used to limit the first limiting layer 572 to prevent the first limiting layer from falling off from the bottom wall of the receiving groove.

[0030] In one embodiment, the inner wall of the receiving groove includes a bottom wall and a side wall, the bottom wall of the receiving groove is opposite to the entrance of the receiving groove, the side wall extends along the axis of the rotating shaft, and the first limiting layer is arranged on the side wall.

[0031] In one embodiment, a third limiting groove is provided on the surface of the first limiting layer facing the inside of the accommodating groove, and the third limiting groove extends along the direction in which the rotating shaft extends. The side wall of the eccentric part can be embedded in the third limiting groove to reduce the degree of shaking of the eccentric column.

[0032] In one embodiment, the shaft mechanism further includes a guide mechanism. The guide mechanism is disposed between the shaft cover assembly and the shaft base. The guide mechanism is used to constrain the shaft cover assembly to move along the thickness direction of the shaft base. Therefore, when the eccentric portion rotates, the shaft assembly can be prevented from shaking left and right, and the shaft assembly can be restricted from moving in the vertical direction.

[0033] In one embodiment, the shaft base has a first guide hole along the thickness direction of the shaft base, the lifting block has a second guide hole, the first guide hole and the second guide hole are coaxially arranged, and guide posts are inserted into the first guide hole and the second guide hole.

[0034] In one embodiment, the eccentric portion includes an eccentric column, which is fixedly arranged at one end of the rotating shaft. The axis of the eccentric column is parallel to the axis of the rotating shaft, and the width of the receiving groove is greater than the diameter of the eccentric column. The width direction of the receiving groove is perpendicular to the axis of the rotating shaft and the thickness direction of the rotating shaft base, respectively, and the axis of the rotating shaft is perpendicular to the thickness direction of the rotating shaft base.

[0035] When the eccentric column rotates around the axis of the rotating shaft, the maximum displacement difference of the eccentric column in the thickness direction of the rotating shaft base is a first distance, the height of the accommodating groove in the thickness direction of the rotating shaft base is a second distance, and the first distance is greater than the second distance.

[0036] In one embodiment, the rotating shaft mechanism further includes a swing arm, and the swing arm is fixedly connected to the rotating shaft.

[0037] The embodiment of the present application also provides a rotating shaft mechanism. The rotating shaft base includes a rotating shaft base, a shaft cover assembly, a rotating shaft and an eccentric column. The shaft cover assembly is arranged on one side of the rotating shaft base along the thickness direction of the rotating shaft base, and the shaft cover assembly is provided with a receiving groove. The rotating shaft is rotatably arranged on the rotating shaft base. The axis of the rotating shaft is perpendicular to the thickness direction of the rotating shaft base. The eccentric column is fixedly arranged at one end of the rotating shaft. The axis of the eccentric column is parallel to the axis of the rotating shaft, the width of the receiving groove is greater than the diameter of the eccentric column, and the width direction of the receiving groove is perpendicular to the axis of the rotating shaft and the thickness direction of the rotating shaft base respectively. When the eccentric column rotates around the axis of the rotating shaft, the maximum displacement difference of the eccentric column in the thickness direction of the rotating shaft base is a first distance, and the height of the receiving groove in the thickness direction of the rotating shaft base is a second distance, and the first distance is greater than the second distance. The limiting member is at least partially located in the receiving groove, and the limiting member is used to abut against the eccentric column when rotating.

[0038] In this embodiment, since the maximum displacement difference of the eccentric column in the thickness direction of the shaft base is the first distance, and the height of the receiving groove in the thickness direction of the shaft base is the second distance, the first distance is greater than the second distance. The width of the receiving groove is greater than the diameter of the eccentric column. Therefore, the eccentric column has space to move left and right when rotating, and can contact the side wall of the receiving groove in the thickness direction of the shaft base, thereby driving the shaft cover assembly to move up and down. During the rotation and movement of the eccentric part, the limiter can at least fill the gap between the receiving groove and the eccentric part, and the eccentric part can limit the rotation or displacement of the limiter relative to the inner wall of the receiving groove when the eccentric part rotates, thereby reducing abnormal noise.

[0039] An embodiment of the present application further provides a foldable terminal device, which includes the hinge mechanism of the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of a foldable terminal device being flattened in some embodiments of the present application;

[0041] Figure 2 A schematic diagram of a foldable terminal device at a certain folding angle in some embodiments of the present application;

[0042] Figure 3 A schematic diagram of a foldable terminal device at a certain folding angle in some embodiments of the present application;

[0043] Figure 4 A side view of a foldable terminal device in a folded state in some embodiments of the present application;

[0044] Figure 5 This is a schematic diagram of a flattened state of a rotating shaft mechanism in some embodiments of the present application;

[0045] Figure 6 This is a schematic diagram of the rotating shaft mechanism at a certain folding angle in some embodiments of the present application;

[0046] Figure 7 An exploded view of a rotating shaft mechanism in some embodiments of the present application;

[0047] Figure 8 Schematic diagram of the rotating shaft and the eccentric part in some embodiments of the present application;

[0048] Fig. 9 In some embodiments of this application Figure 5 Schematic diagram of the AA section;

[0049] Fig.10 In some embodiments of this application Figure 5 Schematic diagram of the middle BB section;

[0050] Fig.10a for Fig.10 An enlarged view of position M in the embodiment shown;

[0051] Fig.11 In some embodiments of this application Figure 6 Schematic diagram of the middle BB section;

[0052] Fig.11a for Fig.11 An enlarged view of position N in the embodiment shown;

[0053] Fig.12 An exploded view of a lifting block and a limiting member included in some embodiments of the present application;

[0054] Fig.13 for Fig.12 Embodiment assembly mechanism Figure 5 BB cross-section diagram in;

[0055] Fig.14 This is a schematic diagram of the cooperation between the lifting block and the limiting member in some embodiments of the present application;

[0056] Fig.15 An exploded view of the lifting block and the limiting member in some embodiments of the present application;

[0057] Fig.16 for Fig.14 A side cross-sectional view of an embodiment assembly mechanism;

[0058] Fig.17 An exploded view of the lifting block and the limiting member in some embodiments of the present application;

[0059] Fig.18 for Fig.17 Embodiment assembly mechanism Figure 5 BB cross-section diagram in;

[0060] Fig.19 An exploded view of a lifting block and a limiting member included in some embodiments of the present application;

[0061] Fig. 20 for Fig.19 A side cross-sectional view of an embodiment assembly mechanism;

[0062] Fig.21 for Fig.19 A front cross-sectional view of the assembly mechanism of the embodiment;

[0063] Fig. 22 Schematic diagram of the limiting member in some embodiments of the present application;

[0064] Fig.23 Schematic diagram of the limiting member in some embodiments of the present application;

[0065] Fig.24 This is an assembly diagram of the lifting block and the limiting member in some embodiments of the present application;

[0066] Fig.25 An assembly diagram of a lifting block and a limiting member included in some embodiments of the present application;

[0067] Fig.26 for Fig.25 Exploded view of the lifting block and the limiting member in the embodiment.

[0068] Description of reference numerals:

[0069] Folding phone 100;

[0070] Folding screen 10;

[0071] Support device 20;

[0072] A first housing 21;

[0073] A second housing 22;

[0074] Rotating shaft mechanism 23;

[0075] A rotating shaft base 110;

[0076] Support plate 350;

[0077] A first guide hole 351;

[0078] A second connecting sleeve 340;

[0079] Connecting plate 352;

[0080] Axle cover assembly 120;

[0081] Lifting block 121;

[0082] A second guide hole 353;

[0083] Axle cover 122;

[0084] cylindrical protrusion 584;

[0085] Thread groove 583;

[0086] Rotating shaft 320;

[0087] Swing arm 300;

[0088] A first connecting sleeve 310;

[0089] A second cam 312;

[0090] second convex portion 313;

[0091] second recess 314;

[0092] Eccentric portion 330;

[0093] Limiting section 322;

[0094] Flat position 324;

[0095] Damping structure 400;

[0096] Elastic member 410;

[0097] A first cam 420;

[0098] first convex portion 421;

[0099] first recess 422;

[0100] Accommodating tank 500;

[0101] Entrance 501;

[0102] Bottom plate 550;

[0103] A first side plate 510;

[0104] Limiting opening 511;

[0105] Limiting step 512;

[0106] A second side plate 520;

[0107] A third side plate 530;

[0108] Fourth side plate 540;

[0109] Guide mechanism 560;

[0110] Guide column 561;

[0111] Limiting member 570;

[0112] A first limiting layer 572;

[0113] The third limiting groove 573;

[0114] Raised structure 574;

[0115] A second limiting layer 575;

[0116] Connecting part 576;

[0117] A first limiting groove 584;

[0118] The second limiting groove 582 . DETAILED DESCRIPTION

[0119] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0120] In the embodiment of the present application, the term "transmission connection" means that among the two connected components, the movement of one component can be transmitted to the other component, and the connection method between the two components includes but is not limited to at least one of the connection methods such as rotation connection, sliding connection, gear meshing transmission connection, sprocket transmission connection, and cam mechanism transmission connection.

[0121] The foldable terminal device in the embodiment of the present application may include an electronic device with a foldable function, such as a foldable mobile phone, a laptop computer, etc. The specific structure of the folding mechanism in the foldable terminal device is described below by taking a foldable mobile phone as an example.

[0122] See also Figure 1 , Figure 1 The three-dimensional diagram of the foldable mobile phone 100 in the unfolded state provided in some embodiments of the present application, the foldable mobile phone 100 is approximately in the shape of a rectangular flat plate in the unfolded state. In order to facilitate the description of each embodiment below, an XYZ coordinate system is established for the foldable mobile phone 100 in the unfolded state, and the length direction of the foldable mobile phone 100 is defined as the X-axis direction, the width direction of the foldable mobile phone 100 is defined as the Y-axis direction, and the thickness direction of the foldable mobile phone 100 is defined as the Z-axis direction. It can be understood that the coordinate system setting of the foldable device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the foldable mobile phone 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0123] The foldable mobile phone 100 includes a foldable screen 10 and a supporting device 20 .

[0124] The foldable screen 10 is used to display information such as images and videos. The foldable screen 10 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (micro organic light-emitting diode) screen, a quantum dot light emitting diode (QLED) screen, a liquid crystal display (LCD), and the like.

[0125] The folding screen 10 has a display area for displaying image information. The display area of ​​the folding screen 10 is exposed to present images, videos and other information to the user. The folding screen 10 includes a first display area 11, a second display area 12 and a third display area 13. The third display area 13 is connected between the first display area 11 and the second display area 12. Figure 1 In the folding mobile phone 100 shown, the folding screen 10 is in the unfolded state, and the first display area 11, the third display area 13, and the second display area 12 are arranged in sequence along the X-axis direction, so that the folding mobile phone 100 is folded in the horizontal direction. In some other embodiments, when the folding screen 10 is in the unfolded state, the first display area 11, the third display area 13, and the second display area 12 can also be arranged in sequence along the Y-axis direction. In this way, the folding mobile phone 100 is folded in the longitudinal direction. When the folding screen 10 is in the unfolded state, a large screen display can be achieved to provide users with richer information and bring users a better user experience.

[0126] At least the third display area 13 of the folding screen 10 is a flexible screen structure. In this way, the third display area 13 can be bent and deformed after being subjected to external force, so that the folding screen 10 is Figure 1 The first display area 11 and the second display area 12 of the folding screen 10 can be a flexible screen structure, a hard screen structure, or a partially flexible screen structure and a partially hard screen structure, which is not specifically limited here.

[0127] The supporting device 20 is used to support the folding screen 10. Figure 2 and Figure 3, are schematic diagrams of the support device 20 at different folding angles, respectively. The support device 20 includes a first shell 21, a second shell 22 and a hinge mechanism 23. The first shell 21 carries the first display area 11, and the second shell 22 carries the second display area 12. The hinge mechanism 23 is connected between the first shell 21 and the second shell 22, and carries the third display area 13. The hinge mechanism 23 is used to achieve the switching of the angle between the second shell 22 and the first shell 21 to support the folding screen 10 to switch between the unfolded state and the folded state. It can be understood that the hinge mechanism 23 can be multiple groups. Multiple groups of hinge mechanisms 23 can be connected between the first shell 21 and the second shell 22.

[0128] In the above embodiment, optionally, the first shell 21 and the second shell 22 may respectively include a middle frame (not shown) and a back cover (not shown) connected together, and a receiving cavity is formed between the middle frame and the back cover, and the receiving cavity is used to receive electronic components such as a motherboard, a camera module, and a battery. On this basis, the first shell 21 and the second shell 22 may be connected to the rotating shaft mechanism 23 by means of the middle frame, or may be connected to the rotating shaft mechanism 23 by means of the back cover.

[0129] The hinge mechanism 23 may include a hinge base 110 and a shaft cover assembly 120. It is understood that in a folding mobile phone 100, there may be multiple hinge mechanisms 23. Multiple hinge mechanisms 23 may share one shaft cover assembly 120. The structures of multiple hinge mechanisms 23 may be the same. The following is an explanation of one hinge mechanism 23:

[0130] The hinge base 110 can be used to support the third display area 13 of the folding screen 10. The first shell 21 and the second shell 22 can rotate around the hinge base 110. The thickness direction of the hinge base 110 ( Figure 1 The foldable screen 10 has a front side and a back side.

[0131] The shaft cover assembly 120 can be used as a protection mechanism for the shaft mechanism 23. The shaft cover assembly 120 can be used to cover the shaft base 110 in the shaft mechanism 23 and the moving parts (not shown in the figure) connected to the shaft base 110. The shaft cover assembly 120 can be arranged on the back of the shaft base 110.

[0132] In addition to the shaft base 110 and the shaft cover assembly 120, the shaft mechanism 23 may also include a swing arm 300. A swing arm 300 may be provided at each end of each shaft base 110. The two swing arms 300 may be rotatably arranged relative to the shaft base 110. That is, the two swing arms 300 may rotate with the shaft base 110 as an axis. The first housing 21 and the second housing 22 may be fixed to the two swing arms 300, respectively. The fixing method of the two swing arms 300 to the first housing 21 and the second housing 22 is not limited, as long as the first housing 21 can be fixed relative to the swing arm 300. The swing arm 300 and the first housing 21 may be fixed by screws. Therefore, the first housing 21 and the second housing 22 can rotate relative to the shaft base 110 so that the folding mobile phone 100 moves between the unfolded state and the folded state. It can be understood that in some embodiments, the shaft mechanism 23 may not need the swing arm 300. The first housing 21 and the second housing 22 are directly rotatably arranged on the shaft base 110.

[0133] Please continue to see Figure 4 When the folding screen 10 is in a folded state, the third display area 13 is folded into a water drop shape. In this shape, the third display area 13 includes an arc segment 133, a first transition segment 131 and a second transition segment 132. The first transition segment 131 is connected between the arc segment 133 and the first display area 11. The second transition segment 132 is connected between the arc segment 133 and the second display area 12. The distance between one end of the first transition segment 131 connected to the first display area 11 and one end of the second transition segment 132 connected to the second display area 12 is n, and the distance between one end of the first transition segment 131 connected to the arc segment 133 and one end of the second transition segment 132 connected to the arc segment 133 is m, and n is greater than m. It can be understood that when the foldable terminal device is in a folded state, the third display area 13 of the folding screen 10 can also be folded into other shapes according to actual needs, and this application does not limit this.

[0134] See also Figure 5 , Figure 6 and Figure 7 , Figure 5 It is a schematic diagram of the rotating shaft mechanism 23 in the unfolded state. Figure 6 Schematic diagram of a certain angle during the switching process of the rotation axis mechanism 23 from the unfolded state to the folded state. Figure 7 for Figure 5 and Figure 6 An exploded view of the rotating shaft mechanism 23 is shown.

[0135] Two first connecting sleeves 310 may be provided at one end of each swing arm 300. The two first connecting sleeves 310 may be coaxially spaced. The first connecting sleeve 310 and the swing arm 300 may be relatively fixedly arranged. In some embodiments, the first connecting sleeve 310 may be fixed to the swing arm 300 by welding or bonding. In other embodiments, the first connecting sleeve 310 and the swing arm 300 may also be integrally formed.

[0136] The shaft base 110 (such as Figure 3 The support plate 350 and the second connecting sleeve 340 may be included. The support plate 350 may be used to support the folding screen 10 (as shown in FIG. Figure 1 The third display area 13 (as shown in Figure 1 ). Every two second connecting sleeves 340 can be connected by a connecting plate 352. A second connecting sleeve 340 can be fixedly arranged at both ends of each connecting plate 352. In other words, two second connecting sleeves 340 and a connecting plate 352 can constitute a connecting sleeve assembly. Specifically, the connecting sleeve assembly can be two. In some embodiments, the second connecting sleeve 340 can be fixed to the connecting plate 352 by welding or bonding.

[0137] The width of the connecting plate 352 can be slightly larger than the width of the support plate 350, and the support plate 350 can be connected across the surface of the connecting plate 352. In other words, the connecting plate 352 and the support plate 350 can be stacked. In this case, the second connecting sleeves 340 located at both ends of the connecting plate 352 are also located on both sides of the support plate 350. The two second connecting sleeves 340 can be symmetrically fixed on both sides of the support plate 350. The connecting plate 352 and the support plate 350 can be relatively fixedly connected. The connecting plate 352 and the support plate 350 can be fixedly connected by bolts. In some embodiments, the connecting plate 352 and the support plate 350 can also be welded, riveted or bonded. In some embodiments, the connecting plate 352 and the support plate 350 can also be integrally formed.

[0138] In some embodiments, the second connecting sleeve 340 may also be directly fixed to the opposite sides of the support plate 350. Optionally, the second connecting sleeve 340 and the support plate 350 may be integrally formed. The second connecting sleeve 340 may also be fixed to the support plate 350 by a mechanical structure or a welding process. In some optional embodiments, the second connecting sleeve 340 may be fixed to the support plate 350 by screws.

[0139] In addition to the shaft base 110 (such as Figure 3), the shaft cover assembly 120 and the swing arm 300. The rotating shaft mechanism 23 may also include two rotating shafts 320. The rotating shafts 320 may extend along the Y direction. Each rotating shaft 320 may pass through two first connecting sleeves 310 and two second connecting sleeves 340. The two first connecting sleeves 310 may be located between the two second connecting sleeves 340.

[0140] A connecting plate 352 may be provided at both ends of the rotating shaft mechanism 23 in the Y direction. The length direction of the connecting plate 352 may be consistent with the X direction. The second connecting sleeves 340 at both ends of each connecting plate 352 may pass through a rotating shaft 320 respectively. The two swing arms 300 are relatively fixedly arranged on a rotating shaft 320 through the first connecting sleeves 310 respectively, and the rotating shaft 320 can rotate relative to the second connecting sleeves 340, so that the two swing arms 300 can be rotated relative to the rotating shaft base 110. For each rotating shaft 320, two second connecting sleeves 340 are arranged at both ends of the rotating shaft 320, which can play a role in limiting the two first connecting sleeves 310 to prevent the swing arms 300 from slipping off the rotating shaft 320.

[0141] The rotating shaft 320 can be fixedly connected to the first connecting sleeve 310. In other words, there is no relative rotation between the rotating shaft 320 and the first connecting sleeve 310. When the first connecting sleeve 310 rotates, it can drive the rotating shaft 320 to rotate. The rotating shaft 320 can be rotatably connected to the second connecting sleeve 340. In other words, the rotating shaft 320 can rotate freely in the second connecting sleeve 340. The rotation here means that the rotating shaft 320 can rotate around its own axis.

[0142] When the swing arm 300 revolves around the rotating shaft base 110 (such as Figure 3 ) rotates, it can drive the first connecting sleeve 310 to rotate, and the first connecting sleeve 310 is rotated and fixedly connected to the rotating shaft 320, so the first connecting sleeve 310 can drive the rotating shaft 320 to rotate. The rotating shaft 320 is rotatably matched with the second connecting sleeve 340, and the second connecting sleeve 340 is fixedly arranged relative to the support plate 350. Therefore, the rotating shaft 320 can rotate relative to the support plate 350.

[0143] See also Figure 7 and Figure 8 The rotating shaft 320 may have a limiting section 322, and a flattened portion 324 may be formed on the surface of the limiting section 322. The flattened portion 324 can prevent the rotating shaft 320 from rotating relative to the first connecting sleeve 310 in the first connecting sleeve 310, so that the rotating shaft 320 and the first connecting sleeve 310 are fixedly arranged.

[0144] See also Fig. 9 , Fig. 9 yes Figure 5and Figure 6 Cross-sectional view at AA. The shape of the inner wall of the first connecting sleeve 310 can be adapted to the shape of the surface of the limiting section 322, that is, the profile of the cross section of the limiting section 322 is substantially the same as the shape of the cross section of the first connecting sleeve 310 corresponding to the limiting section 322. The rest of the rotating shaft 320 except for the flattened section 324 can be cylindrical. When the swing arm 300 swings, it will drive the first connecting sleeve 310. The first connecting sleeve 310 will drive the rotating shaft 320 to rotate through the flattened section 324. Therefore, the swing arm 300 can swing relative to the rotating shaft base 110.

[0145] In some embodiments, the rotating shaft 320 may be interference fit with the first connecting sleeve 310 so that the rotating shaft 320 and the first connecting sleeve 310 are fixed to each other. The swing arm 300 may be fixed to the rotating shaft 320 by welding. The swing arm 300 may also be fixed to the rotating shaft 320 by mechanical connection such as riveting or screw connection.

[0146] Please continue to see Figure 5 , Figure 6 and Figure 7 , the rotating shaft mechanism 23 also includes a damping mechanism 400. The damping mechanism 400 may include an elastic member 410 and a first cam 420. Specifically, for each rotating shaft 320, an elastic member 410 and two first cams 420 are respectively configured. The elastic member 410 may be arranged between the two first cams 420. For each rotating shaft 320, along the axial direction of the rotating shaft 320, the first connecting sleeve 310, the first cam 420, the elastic member 410, the first cam 420, and the first connecting sleeve 310 are arranged in sequence. Among them, each first connecting sleeve 310 is provided with a second cam 312 at one end facing the first cam 420. The first cam 420 may have a first convex portion 421 and a first concave portion 422. The second cam 312 has a second convex portion 313 and a second concave portion 314, respectively. Exemplarily, for the adjacent first cam 420 and second cam 312, when the swing arm 300 switches from the unfolded state to the folded state, the second convex portion 313 of the second cam 312 gradually slides from the first concave portion 422 of the first cam 420 to the first convex portion 421 of the first cam 420. Therefore, the second convex portion 313 of the second cam 312 will gradually abut against the first convex portion 421 of the first cam 420, which will cause the second cam 312 to squeeze the elastic member 410 through the first cam 420. When the swing arm 300 is switched from the unfolded state to the folded state, the resistance brought by the elastic member 410 will be felt, thereby improving the hand feel. A pair of first cam 420 and second cam 312 can be provided at both ends of the rotating shaft 320, and the matching method is consistent with the description of the above embodiment, so the elastic member 410 can be squeezed from both ends respectively.

[0147] It is understood that when the swing arm 300 switches from the folded state to the unfolded state, the movement mode of the elastic member 410 is opposite, so it can assist the swing arm 300 to unfold. Exemplarily, the elastic member 410 can be a spring. The spring can be sleeved in the rotating shaft 320.

[0148] Please see again Figure 7 and Figure 8 , an eccentric portion 330 may be provided at the end of the rotating shaft 320. The eccentric portion 330 is eccentric with respect to the axis of the rotating shaft 320. That is, when the swing arm 300 drives the rotating shaft 320 to rotate, the eccentric portion 330 will rotate around the axis of the rotating shaft 320. It can be understood that when the rotating shaft 320 rotates, the eccentric portion 330 will have a displacement component in the thickness direction of the rotating shaft base 110. For example, in the process of the rotating shaft 320 rotating one circle, the eccentric portion 330 will have a highest point and a lowest point in the thickness direction of the rotating shaft base 110. The distance between the highest point and the lowest point can be the maximum displacement difference of the eccentric portion 330 in the thickness direction of the rotating shaft base 110.

[0149] Please see again Figure 5 , Figure 6 , Figure 7 (The shaft cover 122 is not shown), Fig.10 and Fig.11 . Fig.10 and Fig.11 yes Figure 5 and Figure 6 The shaft cover assembly 120 may include a shaft cover 122 and a lifting block 121. The shaft cover 122 and the lifting block 121 may be relatively fixedly arranged. The lifting block 121 may be located on the rotating shaft base 110 (eg Figure 3 ). The shaft cover 122 is arranged on the side of the lifting block 121 away from the rotating shaft base 110. That is to say, the lifting block 121 is located between the rotating shaft base 110 and the shaft cover 122. The fixing form of the shaft cover 122 and the lifting block 121 is not limited, and the shaft cover 122 and the lifting block 121 can be welded, riveted, etc. The shaft cover 122 and the lifting block 121 can also be connected by a common mechanical connection, such as a clamping or threaded connection. A receiving groove 500 can be opened on the side wall of the lifting block 121. The eccentric portion 330 can be inserted into the receiving groove 500 along the axial direction of the rotating shaft 320.

[0150] The eccentric portion 330 may be an eccentric column, see Figure 8, the eccentric column and the rotating shaft 320 can be connected by a connecting arm 321. The connecting arm 321 can be perpendicular to the eccentric column and the rotating shaft 320 respectively. The eccentric column can be rotatably arranged in the receiving groove 500. The eccentric part 330 and the receiving groove 500 are clearance-matched, that is, the cross-sectional area of ​​the eccentric part 330 can be smaller than the cross-sectional area of ​​the receiving groove 500. The eccentric part 330 has space for rotation and movement in the receiving groove 500. The diameter of the eccentric column can be smaller than the width of the receiving groove 500 along the X direction. The height of the inner wall of the receiving groove 500 in the thickness direction of the rotating shaft base 110 is smaller than the maximum displacement difference of the eccentric part 330 in the thickness direction of the rotating shaft base 110 within one rotation cycle. Therefore, in the thickness direction of the rotating shaft base 110, when the eccentric part 330 rotates, it can drive the shaft cover assembly 120 to move along the thickness direction of the rotating shaft base 110.

[0151] Please continue to see Fig.10 and Fig.11 , the shaft mechanism 23 (such as Figure 3 ) may also include a guide mechanism 560. The guide mechanism 560 may be disposed between the shaft cover assembly 120 and the shaft base 110. The guide mechanism 560 may include a guide post 561. The lifting block 121 is provided with a second guide hole 353. The shaft base 110 has a first guide hole 351 opened along the thickness direction of the shaft base 110. Specifically, the first guide hole 351 may be opened in the support plate 350. The first guide hole 351 and the second guide hole 353 are coaxially arranged, and a guide post 561 is inserted into the first guide hole 351 and the second guide hole 353. The guide post 561 passes through the first guide hole 351 and the second guide hole 353.

[0152] The guide column 561 can be a screw. A threaded groove 583 can be provided on the surface of the shaft cover 122 facing the shaft base. The screw can pass through the first guide hole 351 provided on the support plate 350 and the second guide hole 353 provided on the lifting block 381, and then be inserted into the threaded groove 583 and cooperate with the threaded groove 583. In other words, the screw is relatively fixed to the shaft cover 122 and the lifting block 121 through the threaded groove 583. The diameter of the first guide hole 351 can be slightly larger than the diameter of the screw. In other words, the first guide hole 351 can be matched with the screw clearance, so that the screw can move axially in the first guide hole 351. The first guide hole 351 can have a restraining effect on the movement of the screw. The first guide hole 351 can limit the movement of the screw in the thickness direction of the shaft base to prevent the screw from swinging in the X direction.

[0153] Further, the thread groove 583 may be formed in a cylindrical protrusion 584 on the surface of the shaft cover 122. The diameter of the cylindrical protrusion 584 may be smaller than the diameter of the second guide hole 353, so the cylindrical protrusion 584 may pass through the second guide hole 353 and approach the first guide hole 351. The first guide hole 351 may also limit the movement of the cylindrical protrusion 584 to prevent the first guide hole 351 from swinging in the X direction.

[0154] The following is an explanation of the movement process of the shaft cover assembly 120 driven by the eccentric column:

[0155] like Fig.10 and Fig.11 As shown, when the shaft mechanism 23 (such as Figure 3 When the two swing arms 300 are switched from the unfolded state to the folded state, Fig.11 It can be understood that the rotation of the eccentric column has a component moving along the X direction and a component moving along the Z direction at the same time.

[0156] As described in the above embodiment, in the Z direction, the height of the inner wall of the receiving groove 500 in the thickness direction of the shaft base 110 is less than the height of the eccentric portion 330 in the shaft base 110 (eg, Figure 3 Therefore, in the thickness direction of the shaft base 110, when the eccentric portion 330 rotates, it will contact the inner wall of the accommodating groove 500 in the Z direction, thereby driving the shaft cover assembly 120 to move along the thickness direction of the shaft base 110.

[0157] like Fig.10a and Fig.11a As shown, Fig.10a for Fig.10 The enlarged view at M, Fig.11a for Fig.11 The enlarged view at N. The top b2 of the guide column 561 (the surface of the guide column 561 away from the shaft cover 122 in the Z direction) and the top b1 of the support plate 350 (the surface of the support plate 350 away from the shaft cover 122 in the Z direction) are at Fig.10 The posture and Fig.11 When the swing arm 300 is in the unfolded state, the top b2 of the guide column 561 is lower than the top b1 of the support plate 350. When the swing arm 300 is folded to a certain angle, the top b2 of the guide column 561 will exceed the top b1 of the support plate 350. In other words, when the swing arm 300 is transformed from the unfolded state to the folded state, the shaft cover assembly 120 can move toward the direction close to the shaft base 110; when the swing arm 300 is transformed from the folded state to the unfolded state, the shaft cover assembly 120 can move toward the direction away from the shaft base 110.

[0158] In this case, the shaft cover assembly 120 is closer to the shaft base 110 when the swing arm 300 is in the folded state. When the shaft cover assembly 120 is folded, it is close to the shaft base 110, which can reduce the gap between the shaft cover assembly 120 and the shaft base 110, and to a certain extent, it can avoid the risk of the shaft base 110 and the components connected to the shaft base 110 being exposed.

[0159] It can be understood that by changing the eccentric angle or shape of the eccentric column, the movement direction of the shaft cover assembly 120 relative to the shaft base 110 can be changed. Fig.10 , when the shaft mechanism 23 (such as Figure 3 ) is in a horizontally unfolded state, when the swing arm 300 is in a horizontally unfolded state, the angle between the connecting arm 321 and the horizontal direction (X direction) is a. The connecting arm 321 can be rotated 2×(90°-a) in the counterclockwise direction shown in the figure based on the angle a, and the position of the eccentric column at this angle is used as the initial position when the swing arm 300 is converted from the unfolded state to the folded state. In this case, when the swing arm 300 is converted from the unfolded state to the folded state, the shaft cover assembly 120 can move in a direction away from the shaft base 110. When the swing arm 300 is converted from the folded state to the unfolded state, the shaft cover assembly 120 can move in a direction close to the shaft base 110, and in the folded state, a larger space can be provided between the shaft base 110 and the shaft cover assembly 120.

[0160] From the above embodiment, it can be seen that since the shaft cover assembly 120 is constrained by the guide mechanism 560 in the Z direction, that is, the shaft cover assembly 120 cannot move along the X direction with the eccentric column when the eccentric column rotates. Therefore, the eccentric column will move toward the X direction relative to the receiving groove 500.

[0161] Please continue to see Fig.10a and Fig.11a , the eccentric column has a first distance L1 from the inner wall of the receiving groove 500 in the X direction. When the swing arm 300 is converted from the unfolded state to the folded state, the eccentric column is driven by the swing arm 300 to approach the inner wall of the receiving groove 500 to the right along the X direction. At this time, the distance between the eccentric column and the inner wall of the receiving groove 500 can be a second distance L2, and the second distance L2 can be smaller than the first distance L1. In this process, the eccentric column rolls in the receiving groove 500. Due to the gap between the eccentric column and the inner wall of the receiving groove 500, the eccentric column will collide with the inner wall of the receiving groove 500 due to shaking during the rolling process, which will cause abnormal noise.

[0162] The inventors further discovered that the eccentric column will generate sliding friction with the inner wall of the receiving groove 500 during the rotation process. If the gap between the eccentric part 330 and the inner wall of the receiving groove 500 is not well controlled, the eccentric part 330 will collide with the inner wall of the receiving groove 500 during the reciprocating motion and produce abnormal noise. If the gap between the eccentric part 330 and the inner wall of the receiving groove 500 is strictly controlled, the processing accuracy of the receiving groove 500 and the eccentric part 330 will be very high, which will increase the production cost. Therefore, a low-cost solution to reduce the abnormal noise of the rotating shaft mechanism 23 is proposed.

[0163] The rotating shaft mechanism 23 of the embodiment of the present application may include a limiter. The limiter may be at least partially located in the receiving groove 500. The limiter may also be entirely disposed in the receiving groove 500. The limiter may be used to adjust the gap between the eccentric portion 330 and the inner wall of the receiving groove 500, thereby limiting the shaking of the limiter in the receiving groove 500, reducing the hard friction between the eccentric portion 330 and the inner wall of the receiving groove 500, and thus reducing abnormal noise. By reducing the gap between the eccentric portion 330 and the inner wall of the receiving groove 500 through the limiter, the machining accuracy requirements for the receiving groove 500 and the eccentric portion 330 may also be reduced, effectively reducing costs.

[0164] The material hardness of the stopper may be less than the hardness of the inner wall of the receiving groove 500 and the eccentric portion 330, and the stopper may play a buffering role between the receiving groove 500 and the eccentric portion 330. In some embodiments, the stopper may be a block or layered structure. The shape of the stopper may also be adapted to the shape of the inner wall of the receiving groove 500, and the shape of the stopper may also be adapted to the shape of the eccentric column.

[0165] See also Fig.12 and Fig.13 The limiting member 570 includes a first limiting layer 572. Fig.12 It is an exploded view of the cooperation between the lifting block 121 and the first limiting layer 572. Fig.13 for Fig.12 A cross-sectional side view of the lifting block 121 and the first limiting layer 572. The receiving slot 500 may include a bottom plate 550, a first side plate 510, a second side plate 520, and a fourth side plate 540. The bottom plate 550, the first side plate 510, the second side plate 520, and the fourth side plate 540 may surround and form the receiving slot 500. The first side plate 510, the second side plate 520, and the fourth side plate 540 are respectively arranged along the rotation axis 320 (such as Figure 7) extends along an axis of the first side plate 510, the second side plate 520 and the fourth side plate 540. The ends of the first side plate 510, the second side plate 520 and the fourth side plate 540 are respectively abutted against the bottom plate 550. The bottom plate 550 may be perpendicular to the axis of the rotating shaft 320. The plane where the first side plate 510 is located and the plane where the second side plate 520 is located may be perpendicular. The fourth side plate 540 may be arranged close to the shaft cover 122. The fourth side plate 540 may be parallel to the first side plate 510. The bottom plate 550, the first side plate 510, the second side plate 520 and the fourth side plate 540 may be spliced ​​together by a mechanical structure, or may be integrally formed.

[0166] The first side plate 510, the second side plate 520 and the fourth side plate 540 may have an inlet 501 at one end away from the bottom plate 550. That is, the bottom plate 550 may be opposite to the inlet 501. The eccentric portion 330 may enter the receiving groove 500 through the inlet 501. The surfaces of the first side plate 510, the second side plate 520 and the fourth side plate 540 facing the inside of the receiving groove 500 may constitute the side wall of the receiving groove 500. The surface of the bottom plate 550 facing the inside of the receiving groove 500 constitutes the bottom wall of the receiving groove 500. The bottom plate 550 being opposite to the inlet 501 may be understood as the bottom wall of the receiving groove 500 being opposite to the inlet 501. The bottom wall of the receiving groove 500 and the side wall of the receiving groove 500 may constitute the inner wall of the receiving groove 500.

[0167] The first limiting layer 572 may be located on the side wall of the receiving groove 500. Specifically, the first limiting layer 572 may be fixed on the surface of the fourth side plate 540 facing the inside of the receiving groove 500. The fourth side plate 540 may be closer to the shaft cover 122 relative to the first side plate 510. The first limiting layer 572 may extend along the depth direction (Y direction) of the receiving groove 500. The side wall of the eccentric column may contact the surface of the first limiting layer 572. The first limiting layer 572 may be fixed to the side wall of the receiving groove 500 by bonding or welding. The first limiting layer 572 can fill the gap between the receiving groove 500 and the eccentric column in the Z direction, reducing the collision of the eccentric column with the side wall of the receiving groove 500 in the Z direction.

[0168] It is understandable that the first limiting layer 572 can be set at any position of the inner wall of the receiving groove 500, as long as it can be located between the eccentric portion 330 and the inner wall of the receiving groove 500 to reduce the abnormal sound. In some embodiments, the first limiting layer 572 and the eccentric column can be an interference fit. The first limiting layer 572 can provide resistance to the rotation of the eccentric column, so it can have a damping effect and improve the opening and closing feel of the user during operation. It is understandable that the first limiting layer 572 can be a plate-like structure, and the thickness of the first limiting layer 572 can be set as needed.

[0169] See also Fig.14 ,exist Fig.12 and Fig.13Based on the embodiment, the surface of the first limiting layer 572 facing the inner wall of the receiving groove 500 can form a third limiting groove 573. The third limiting groove 573 extends along the direction in which the rotating shaft 320 extends. In other words, the side wall of the eccentric column can be embedded in the third limiting groove 573 to reduce the degree of shaking of the eccentric column. In some embodiments, the material of the first limiting layer 572 can be a material with a certain flexibility such as rubber, metal sheet, etc. The first limiting layer 572 can be fixed to the side wall of the receiving groove 500 by bonding or welding.

[0170] See also Fig.15 and Fig.16 , Fig.15 It is an exploded view of the cooperation between the lifting block 121 and the first limiting layer 572. Fig.16 for Fig.15 A cross-sectional side view of the cooperation between the lifting block 121 and the first limiting layer 572. Fig.12 and Fig.13 The difference between the embodiments is that the first limiting layer 572 can be located at the bottom wall of the receiving groove 500. In other words, the first limiting layer 572 can cover the bottom wall of the receiving groove 500. The end of the eccentric column can abut the bottom wall of the receiving groove 500. Therefore, the first limiting layer 572 can prevent the eccentric column from shaking axially on the rotating shaft 320. In addition, the end of the eccentric column can abut the surface of the first limiting layer 572. When the end of the eccentric column abuts the first limiting layer 572, it can avoid the end of the eccentric column directly colliding with the bottom of the receiving groove 500 due to shaking, thereby reducing abnormal noise. The abutment of the end of the eccentric column with the first limiting layer 572 can also have a damping effect on the rotation of the eccentric column.

[0171] exist Fig.15 and Fig.16 Based on the embodiment shown, the bottom wall of the receiving groove 500 is provided with a limiting step 512. The limiting step 512 can extend along the X direction on the surface of the bottom plate 550. The number of the limiting steps 512 is not limited, such as Fig.15 and Fig.16 As shown, when there are two limiting steps 512, the two limiting steps 512 can be respectively arranged at two opposite edges of the bottom wall of the receiving groove 500 and respectively close to the side wall of the receiving groove 500. The space between the two limiting steps can be used to limit the first limiting layer 572 to prevent the first limiting layer 572 from falling off the bottom wall of the receiving groove 500.

[0172] In some embodiments, when there is one limiting step 512, the first limiting layer 572 is sandwiched between the limiting step 512 and the side wall of the receiving groove 500. Exemplarily, the limiting step 512 can be located at the edge of the bottom wall of the receiving groove 500. A space can be formed between the limiting step 512 and the side wall of the receiving groove 500, and the first limiting layer 572 can be accommodated in the space to prevent the first limiting layer 572 from shaking in the receiving groove 500. The limiting step 512 can be integrally formed with the inner wall of the receiving groove 500. The limiting step 512 can also be fixed to the inner wall of the receiving groove 500 as a separate part.

[0173] See also Fig.17 and Fig.18 , Fig.17 FIG. 5 is an exploded view of the lifting block 121 and the limiting member 570 in one embodiment. Fig.18 for Fig.17 A cross-sectional schematic diagram of the cooperation between the lifting block 121 and the limiting member 570 .

[0174] In addition to the first limiting layer 572, the limiting member 570 may further include a second limiting layer 575 and a connecting portion 576. The second limiting layer 575 may be located on the outer wall of the lifting block 121. The second limiting layer 575 may be fixed to the outer wall of the lifting block 121 by bonding or embedding. The first limiting layer 572 may be located on the inner wall of the receiving groove 500. The first limiting layer 572 may be connected to the second limiting layer 575 by a connecting portion 576. The connecting portion 576 may connect the first limiting layer 572 and the second limiting layer 575 in a bent state. The projections of the first limiting layer 572 and the second limiting layer 575 on the inner wall of the receiving groove 500 may have overlapping parts or may not have overlapping parts. The second limiting layer 575 may restrain the first limiting layer 572 to prevent the first limiting layer 572 from falling off from the inner wall of the receiving groove 500. In other words, when the eccentric column rotates, the first limiting layer 572 is not easy to fall off from the inside of the receiving groove 500.

[0175] In some embodiments, the connection portion 576 can be a flexible material such as polyester, or a flexible metal material. The connection portion 576 can be a sheet structure, or a columnar structure that can be bent. The two ends of the columnar structure can be connected to the first limiting layer 572 and the second limiting layer 575 respectively. The connection portion 576 can also be embedded in the outer wall of the lifting block 121 to prevent the connection portion 576 from falling off.

[0176] The first limiting layer 572, the second limiting layer 575 and the connecting portion 576 can be integrally formed. When the first limiting layer 572, the connecting portion 576 and the second limiting layer 575 are flattened and laid on a plane, they present a flat plate structure. After the first limiting layer 572, the second limiting layer 575 and the connecting portion 576 are formed, they can be U-shaped. When the limiting member 570 is matched with the lifting block 121, the first limiting layer 572 and the second limiting layer 575 can be respectively attached between the inner wall of the receiving groove 500 and the outer wall of the lifting block 121. It can be understood that the outer wall of the lifting block 121 and the outer wall of the receiving groove 500 refer to the same surface.

[0177] The first limiting layer 572, the connecting portion 576 and the second limiting layer 575 can be formed on the lifting block 121 by injection molding. The material of the first limiting layer 572, the connecting portion 576 and the second limiting layer 575 can be soft glue, such as polyester materials such as rubber, or polycarbonate (PC) material. In some embodiments, the protruding structure 574 can also be made by a mold.

[0178] Please continue to see Fig.17 and Fig.18 In addition to the first side plate 510, the second side plate 520 and the fourth side plate 540, the receiving groove 500 may also include a third side plate 530. The plane where the first side plate 510 is located may be aligned with the rotating shaft base 110 (such as Figure 3 ) is perpendicular to the thickness direction of the first side plate 510. The second side plate 520 and the third side plate 530 can be located at opposite ends of the first side plate 510, respectively. The plane where the second side plate 520 is located and the plane where the third side plate 530 is located can extend along the axis of the rotating shaft 320. In other words, the second side plate 520 and the third side plate 530 can be parallel to the axis of the rotating shaft 320. Further, the second side plate 520 and the third side plate 530 can be parallel to the Z direction. The opposite ends of the first side plate 510 can be respectively abutted against the two opposite surfaces of the second side plate 520 and the third side plate 530. On one side of the first side plate 510, that is, on the side where the limiting block 121 is away from the accommodating groove 500, the first side plate 510, the second side plate 520 and the third side plate 530 surround and form a second limiting groove 582. On the other side of the first side plate 510, that is, one side in the receiving groove 500, the first side plate 510, the second side plate 520 and the third side plate 530 surround and constitute a part of the receiving groove 500. The second limiting layer 575 can be located in the second limiting groove 582. The second limiting layer 575 can be embedded in the second limiting groove 582 to prevent the second limiting layer 575 from falling off from the surface of the lifting block 121.

[0179] It is understandable that when the lifting block 121 is an integral structure, the second limiting groove 582 may also be a recessed structure formed on the surface of the lifting block 121. The second limiting layer 575 may be embedded in the second limiting groove 582. The shape of the second limiting groove 582 may be adapted to the shape of the second limiting layer 575. In some embodiments, the second limiting layer 575 may be rectangular, elliptical, conical, circular, etc. The depth of the second limiting groove 582 may be the same as the thickness of the second limiting layer 575. The depth of the second limiting groove 582 may also be slightly greater than the thickness of the second limiting layer 575.

[0180] The first side plate 510, the second side plate 520 and the third side plate 530 surround the inner wall of the receiving groove 500 to form a first limiting groove 584. That is to say, the first side plate 510, the second side plate 520 and the third side plate 530 surround the surface facing the inside of the receiving groove 500 to form the first limiting groove 584. The first limiting layer 572 is located at the first limiting groove 584. The second limiting groove 582 and the first limiting groove 584 can be divided into two sides located at the first side plate 510. It can be understood that the first limiting groove 584 can be a part of the receiving groove 500. The shape of the first limiting groove 584 can be adapted to the shape of the first limiting layer 572, so that the first limiting layer 572 can be prevented from shaking in the receiving groove 500. Further, the distance between the second side plate 520 and the third side plate 530 can be the same as the width of the first limiting layer 572, so as to prevent the first limiting layer 572 from shaking.

[0181] The first side plate 510, the second side plate 520, the third side plate 530 and the fourth side plate 540, one end away from the bottom plate 550, constitute the entrance 501 of the receiving groove 500. The first side plate 510, the second side plate 520, the third side plate 530 and the fourth side plate 540, one end facing the bottom plate 550, are all in contact with the surface of the bottom plate 550. In the axial direction along the rotating shaft 320, the length of the second side plate 520 and the length of the third side plate 530 can be the same, and the length of the first side plate 510 can be less than the length of the second side plate 520 and the third side plate 530. Therefore, at the entrance 501 of the receiving groove 500, the first side plate 510 is a short plate, which is equivalent to the first side plate 510 being sunken toward the bottom plate 550 to form a limiting opening 511. The connecting portion 576 can overlap the limiting opening 511 to connect the first limiting layer 572 and the second limiting layer 575. It can be understood that the first side plate 510 can have a certain thickness, and the connecting portion 576 can cover the end of the first side plate 510 forming the limiting opening 511. The limiting opening 511 can also prevent the connecting portion 576 from falling off from the limiting opening 511.

[0182] See also Fig.19 , Fig. 20 and Fig.21 , Fig.19FIG. 5 is an exploded view of the lifting block 121 and the limiting member 570 in one embodiment. Fig. 20 for Fig.19 A schematic side cross-sectional view of the cooperation between the lifting block 121 and the limiting member 570. Fig.21 for Fig.19 A schematic diagram of the front view cross section of the lifting block 121 and the stopper. Fig.17 and Fig.18 On the basis of the embodiment, the material of the first limiting layer 572, the second limiting layer 575 and the connecting part 576 is replaced by metal from soft glue. For example, the first limiting layer 572, the second limiting layer 575 and the connecting part 576 can be stainless steel. The first limiting layer 572, the second limiting layer 575 and the connecting part 576 are connected to each other to form a curved metal sheet structure. The first limiting layer 572 and the second limiting layer 575 can be the two ends of the metal sheet structure. The connecting part 576 is the curved part of the metal sheet structure. The metal sheet structure can have a certain elasticity. In some embodiments, the metal sheet structure can be made of stainless steel.

[0183] See also Fig. 22 , Fig. 22 : is a schematic diagram of a limiting member 570, wherein the first limiting layer 572 is provided with a protruding structure 574 protruding toward the receiving groove 500, and the protruding structure 574 abuts against the side wall of the eccentric column. The protruding structure 574 may have a certain elasticity, so it can buffer the eccentric column when the eccentric column shakes. In some embodiments, the number of protruding structures 574 can be set as needed, for example, a plurality of protruding structures 574 arranged at intervals can be formed on the surface of the first limiting layer 572, so that the first limiting layer 572 can form multiple contact points with the side wall of the eccentric column to improve the stability of the contact. The formation method of the protruding structure 574 is not limited, for example, the protruding structure 574 can be formed by bending the first limiting layer 572. In some embodiments, the protruding structure 574 can be formed by stamping and bending.

[0184] The protruding structure 574 is disposed in the middle of the first limiting layer 572. That is, the protruding structure 574 may not be at the end of the first limiting layer 572. Both ends of the first limiting layer 572 are respectively in contact with the surface of the first side plate 510 facing the receiving groove 500. When the protruding structure 574 is squeezed by the eccentric column, the force can be transmitted to the first side plate 510 through the end of the first limiting layer 572.

[0185] See also Fig.23 , Fig.235 is a schematic diagram of another embodiment of the stopper 570. In some embodiments, the protruding structure 574 is located at one end of the first stopper layer 572 close to the bottom plate 550. The protruding structure 574 can support and buffer the eccentric column. In some embodiments, the end of the metal sheet structure can be bent to form the protruding structure 574. The end of the metal sheet can form a folded structure supported on the surface of the first side plate 510 to enhance stability.

[0186] See also Fig.24 , Fig.24 Schematic diagram of another embodiment of the cooperation between the stopper 570 and the lifting block 121. Different from the above embodiment, the first stopper layer 572 can be located on the side of the fourth side plate 540 facing the inside of the receiving groove 500, and the second stopper layer 575 can be located on the side of the fourth side plate 540 facing away from the inside of the receiving groove 500. In other words, the first stopper layer 572 and the second stopper layer 575 are clamped on two opposite surfaces of the fourth side plate 540 through the connecting portion 576.

[0187] See also Fig.25 and 26 , Fig.25 This is a schematic diagram of the cooperation between the stopper 570 and the lifting block 121 in another embodiment. Fig.26 for Fig.25 Exploded view of the embodiment. Different from the above embodiment, in this embodiment, the first limiting layer 572 is located on the surface of the bottom plate 550 facing the inside of the receiving groove 500. The second limiting layer 575 is located on the surface of the bottom plate 550 away from the inside of the receiving groove 500. The connecting portion 576 connects the first limiting layer 572 and the second limiting layer 575 through the opening 502 located between the first side plate 510 and the fourth side plate 540.

[0188] The second limiting layer 575 can be fixed to the outer wall of the bottom plate 550 by bonding, welding, etc., so as to prevent the first limiting layer 572 from falling off the bottom plate 550. The first limiting layer 572 can reduce the impact of the end of the eccentric column on the bottom of the receiving groove 500, and can also provide damping for the rotation of the eccentric column, thereby improving the user's feel.

[0189] The opening 502 formed between the first side plate 510 and the fourth side plate 540 can be set according to size. The opening 502 between the first side plate 510 and the fourth side plate 540 can be opposite to the third side plate 530. The same end of the first side plate 510 and the fourth side plate 540 abuts against the surface of the second side plate 520 facing the receiving groove 500. The other end of the first side plate 510 and the fourth side plate 540 can be a free end to form an opening 502. Through the opening 502, the connecting portion 576 can bypass the end of the bottom plate 550 away from the second side plate 520 and connect the first limiting layer 572 and the second limiting layer 575 respectively. In some embodiments, the connecting portion 576 can be embedded in the end of the bottom plate 550 away from the second side plate 520 to enhance the stability of the cooperation between the limiting member 570 and the lifting block 121.

[0190] It can be seen from the above embodiments that the lifting block 121 can be a symmetrical structure. That is, the two receiving grooves 500 can be symmetrically arranged about the second guide hole 353. The second guide hole 353 can be located on the symmetry axis of the rotating shaft mechanism 23. The second side plate 520 can be arranged close to the second guide hole 353. The above-mentioned opening 502 can be formed on the side of the second side plate 520 away from the second guide hole 353. Each receiving groove 500 can cooperate with a limit member 570. Since the structure and cooperation relationship of each receiving groove 500 and the limit member 570 are the same, they are not repeated here.

[0191] It can be understood that the verticality and parallelism described in the embodiments of the present application are not strictly verticality and parallelism in the mathematical sense. The verticality here can be understood as a positional relationship that is close to vertical within the range of manufacturing error and operation error.

[0192] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0193] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: include: Axis base; A shaft cover assembly is arranged on one side of the shaft base along the thickness direction of the shaft base, and the shaft cover assembly is provided with a receiving groove; A rotating shaft, rotatably disposed on the rotating shaft base; An eccentric portion, fixedly disposed at one end of the rotating shaft, the eccentric portion deviating from the axis of the rotating shaft; The eccentric part is rotatably arranged in the receiving groove and is in clearance fit with the receiving groove. When the rotating shaft rotates, the eccentric part can be driven to rotate in the receiving groove. During the rotation process, the eccentric part can drive the shaft cover assembly to move along the thickness direction of the rotating shaft base. And a limiting member, at least partly located in the accommodating groove, is used to abut against the eccentric portion during rotation.

2. The rotating shaft mechanism according to claim 1, characterized in that: The limiting member includes a first limiting layer, the first limiting layer is arranged on the inner wall of the accommodating groove, and the eccentric portion abuts against the first limiting layer.

3. The rotating shaft mechanism according to claim 2, characterized in that: The shaft cover assembly comprises a lifting block and a shaft cover which are relatively fixedly arranged. The shaft cover is arranged on a side of the lifting block away from the rotating shaft base. The lifting block is provided with the accommodating groove.

4. The rotating shaft mechanism according to claim 3, characterized in that: The limiting member further includes a second limiting layer and a connecting portion, the second limiting layer is arranged on the outer wall of the lifting block, the inner wall of the accommodating groove is opposite to the outer wall of the lifting block, and the first limiting layer and the second limiting layer are connected by the connecting portion.

5. The rotating shaft mechanism according to claim 4, characterized in that: The lifting block includes a bottom plate and a first side plate, the bottom plate and the first side plate surround at least a portion of the receiving groove, the entrance of the receiving groove is opposite to the bottom plate, the plane where the first side plate is located extends along the axis of the rotating shaft, the first limiting layer is located on the surface of the first side plate facing the inside of the receiving groove, the second limiting layer is located on the surface of the first side plate away from the inside of the receiving groove, and the connecting portion connects the first limiting layer and the second limiting layer through the entrance of the receiving groove.

6. The rotating shaft mechanism according to claim 5, characterized in that: The first limiting layer is provided with a protruding structure protruding toward the accommodating groove, and the protruding structure abuts against the eccentric portion.

7. The rotating shaft mechanism according to claim 6, characterized in that: The protruding structure is arranged in the middle of the first limiting layer, and two ends of the first limiting layer are respectively in contact with the surface of the first side plate facing the containing groove.

8. The rotating shaft mechanism according to claim 6, characterized in that: The protruding structure is located at one end of the first limiting layer close to the bottom plate.

9. The rotating shaft mechanism according to any one of claims 5 to 8, characterized in that: The lifting block includes a second side plate and a third side plate, the planes where the second side plate and the third side plate are located extend along the axis of the rotating shaft and are respectively located at opposite ends of the first side plate, the bottom plate, the first side plate, the second side plate and the third side plate surround at least part of the accommodating groove, the first side plate, the second side plate and the third side plate surround the outer wall of the lifting block to form a first limiting groove, and the second limiting layer is located in the first limiting groove.

10. The rotating shaft mechanism according to claim 9, characterized in that: The bottom plate, the first side plate, the second side plate and the third side plate surround the inner wall of the accommodating groove to form a second limiting groove, and the first limiting layer is located in the second limiting groove.

11. The rotating shaft mechanism according to any one of claims 5 to 8 and 10, characterized in that: The first side plate is sunken toward the bottom plate at the entrance of the accommodating groove to form a limiting opening, and the connecting portion is located at the limiting opening.

12. The rotating shaft mechanism according to claim 4, characterized in that: The lifting block comprises a bottom plate, a first side plate and a fourth side plate, the entrance of the receiving groove is opposite to the bottom plate, the plane where the first side plate and the plane where the fourth side plate are located extend along the axis of the rotating shaft, the fourth side plate is opposite to the first side plate, and the bottom plate, the first side plate and the fourth side plate surround and form at least a part of the receiving groove; The first limiting layer is located on the surface of the bottom plate facing the interior of the accommodating groove, the second limiting layer is located on the surface of the bottom plate away from the interior of the accommodating groove, and the connecting portion connects the first limiting layer and the second limiting layer through an opening located between the first side plate and the fourth side plate.

13. The rotating shaft mechanism according to any one of claims 4 to 8, 10 and 12, characterized in that: The first limiting layer, the connecting portion and the second limiting layer are integrally formed.

14. The rotating shaft mechanism according to any one of claims 4 to 8, 10 and 12, characterized in that: The first limiting layer, the connecting portion and the second limiting layer are metal sheets.

15. The rotating shaft mechanism according to any one of claims 4 to 8, 10 and 12, characterized in that: The first limiting layer, the second limiting layer and the connecting layer are formed on the lifting block by injection molding.

16. The rotating shaft mechanism according to claim 2, characterized in that: The inner wall of the receiving groove includes a bottom wall and a side wall, the bottom wall of the receiving groove is opposite to the entrance of the receiving groove, the side wall extends along the axis of the rotating shaft, and the first limiting layer is arranged on the bottom wall of the receiving groove.

17. The rotating shaft mechanism according to claim 16, characterized in that: The bottom wall of the accommodating groove is provided with two limiting steps at intervals, and the first limiting layer is sandwiched between the two limiting steps.

18. The rotating shaft mechanism according to claim 2, characterized in that: The inner wall of the receiving groove includes a bottom wall and a side wall, the bottom wall of the receiving groove is opposite to the entrance of the receiving groove, the side wall extends along the axis of the rotating shaft, and the first limiting layer is arranged on the side wall.

19. The rotating shaft mechanism according to claim 18, characterized in that: A third limiting groove is arranged on a surface of the first limiting layer facing the interior of the accommodating groove, and the third limiting groove extends along a direction in which the rotating shaft extends.

20. The rotating shaft mechanism according to any one of claims 3 to 5, 10 and 12, characterized in that: Also includes: The guide mechanism is arranged between the shaft cover assembly and the rotating shaft base, and is used to constrain the shaft cover assembly to move along the thickness direction of the rotating shaft base.

21. The rotating shaft mechanism according to claim 20, characterized in that: The shaft base is provided with a first guide hole along the thickness direction of the shaft base, the lifting block is provided with a second guide hole, the first guide hole and the second guide hole are coaxially arranged, and guide columns are penetrated in the first guide hole and the second guide hole.

22. The rotating shaft mechanism according to any one of claims 1-8, 10, 12, 16-19, 21, characterized in that: The eccentric part comprises an eccentric column, the eccentric column is fixedly arranged at one end of the rotating shaft, the axis of the eccentric column is parallel to the axis of the rotating shaft, the width of the accommodating groove is greater than the diameter of the eccentric column, the width direction of the accommodating groove is respectively perpendicular to the axis of the rotating shaft and the thickness direction of the rotating shaft base, and the axis of the rotating shaft is perpendicular to the thickness direction of the rotating shaft base; When the eccentric column rotates around the axis of the rotating shaft, the maximum displacement difference of the eccentric column in the thickness direction of the rotating shaft base is a first distance, the height of the accommodating groove in the thickness direction of the rotating shaft base is a second distance, and the first distance is greater than the second distance.

23. The rotating shaft mechanism according to any one of claims 1-8, 10, 12, 16-19, 21, characterized in that: It also includes a swing arm fixedly connected to the rotating shaft.

24. A rotating shaft mechanism, characterized in that: include: Axis base; A shaft cover assembly is arranged on one side of the shaft base along the thickness direction of the shaft base, and the shaft cover assembly is provided with a receiving groove; A rotating shaft, rotatably disposed on the rotating shaft base, wherein the axis of the rotating shaft is perpendicular to the thickness direction of the rotating shaft base; An eccentric column is fixedly arranged at one end of the rotating shaft, the axis of the eccentric column intersects with the axis of the rotating shaft, the width of the receiving groove is greater than the diameter of the eccentric column, and the width direction of the receiving groove is perpendicular to the axis of the rotating shaft and the thickness direction of the rotating shaft base respectively; When the eccentric column rotates around the axis of the rotating shaft, the maximum displacement difference of the eccentric column in the thickness direction of the rotating shaft base is a first distance, the height of the accommodating groove in the thickness direction of the rotating shaft base is a second distance, and the first distance is greater than the second distance; as well as The limiting member is at least partially located in the accommodating groove and is used for abutting against the eccentric column during rotation.

25. The rotating shaft mechanism according to claim 24, characterized in that: The limiting member includes a first limiting layer, the first limiting layer is arranged on the inner wall of the accommodating groove, and the eccentric portion abuts against the first limiting layer.

26. The rotating shaft mechanism according to claim 25, characterized in that: The shaft cover assembly comprises a lifting block and a shaft cover which are relatively fixedly arranged. The shaft cover is arranged on a side of the lifting block away from the rotating shaft base. The lifting block is provided with the accommodating groove.

27. The rotating shaft mechanism according to claim 26, characterized in that: The limiting member also includes: A second limiting layer and a connecting portion, wherein the connecting portion is connected to the first limiting layer and the second limiting layer respectively; The lifting block includes a bottom plate and a first side plate, the bottom plate and the first side plate surround at least a portion of the receiving groove, the entrance of the receiving groove is opposite to the bottom plate, the plane where the first side plate is located extends along the axis of the rotating shaft, the first limiting layer is located on the surface of the first side plate facing the inside of the receiving groove, the second limiting layer is located on the surface of the first side plate away from the inside of the receiving groove, and the connecting portion connects the first limiting layer and the second limiting layer through the entrance of the receiving groove.

28. The rotating shaft mechanism according to claim 27, characterized in that: The lifting block includes a second side plate and a third side plate, the planes where the second side plate and the third side plate are located extend along the axis of the rotating shaft and are respectively located at two opposite ends of the first side plate, and the bottom plate, the first side plate, the second side plate and the third side plate surround and form at least a portion of the accommodating groove; The first side plate, the second side plate and the third side plate surround the outer wall of the lifting block to form a first limiting groove, and the second limiting layer is located in the first limiting groove; The first side plate, the second side plate and the third side plate surround the inner wall of the accommodating groove to form a second limiting groove, and the first limiting layer is located in the second limiting groove.

29. The rotating shaft mechanism according to claim 27 or 28, characterized in that: The first side plate is sunken toward the bottom plate at the entrance of the accommodating groove to form a limiting opening, and the connecting portion is located at the limiting opening.

30. The rotating shaft mechanism according to any one of claims 25 to 28, characterized in that: The first limiting layer is provided with a protruding structure protruding toward the accommodating groove, and the protruding structure abuts against the eccentric portion.

31. The rotating shaft mechanism according to any one of claims 24 to 28, characterized in that: Also includes: The guide mechanism is arranged between the shaft cover assembly and the rotating shaft base, and is used to constrain the shaft cover assembly to move along the thickness direction of the rotating shaft base.

32. A foldable terminal device, characterized in that: Comprising the rotating shaft mechanism described in any one of claims 1-31.

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