Rotating shaft mechanism and electronic equipment

Abstract

This application provides a pivot mechanism and an electronic device, relating to the field of electronic product technology, which can ensure the structural strength of the connection between the swing arm and the pivot base while achieving a thinner overall device thickness. The pivot mechanism includes a pivot base and a first swing arm. The pivot base includes a first mating part, a second mating part, and a third mating part arranged sequentially along the extension direction of the pivot axis. The front side of the first mating part is a first concave arc surface, the back side of the second mating part is a first convex arc surface, and the front side of the third mating part is a second concave arc surface. The first swing arm includes a fourth mating part, a fifth mating part, and a sixth mating part. The fourth mating part is located in front of the first mating part, the fifth mating part is located in back of the second mating part, and the sixth mating part is located in front of the third mating part. The fourth, fifth, and sixth mating parts can slide along the first concave arc surface, the first convex arc surface, and the second concave arc surface, respectively, so that the first swing arm rotates relative to the pivot base about the pivot axis.

Description

[0001] This application is a divisional application. The original application has the application number 202311468979.0 and the original application date is November 6, 2023. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic product technology, and more particularly to a rotating shaft mechanism and an electronic device. Background Technology

[0003] Foldable screen phones, laptops, watches and other electronic devices have a hinge mechanism, which is used to enable a rotatable connection between two adjacent parts.

[0004] Within the pivot mechanism, the structural strength of the connection between the swing arm and the pivot base affects the overall structural strength of the device. As electronic devices become thinner, the design thickness of the pivot base gradually decreases, and the thickness of the groove within the pivot base that mates with the swing arm also decreases. The thickness of the sliding components on the swing arm that engage with the groove also becomes increasingly thin, resulting in lower structural strength at the connection point and a higher risk of breakage. Therefore, existing electronic devices typically cannot simultaneously achieve a thinner overall design while maintaining the structural strength of the connection between the swing arm and the pivot base within the pivot mechanism. Summary of the Invention

[0005] This application provides a pivot mechanism and an electronic device that can ensure the structural strength of the connection between the swing arm and the pivot base while achieving a thinner overall thickness.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, a pivot mechanism is provided, which includes a pivot base and a first swing arm.

[0008] The rotating shaft base includes a first mating part, a second mating part, and a third mating part arranged sequentially along the extension direction of the rotating axis. The front side of the first mating part is a first concave arc surface, the back side of the second mating part is a first convex arc surface, and the front side of the third mating part is a second concave arc surface. The center lines of the first concave arc surface, the first convex arc surface, and the second concave arc surface are collinear with the rotating axis.

[0009] The first swing arm includes a rotating end, which comprises a fourth mating part, a fifth mating part, and a sixth mating part. The fourth mating part is located in front of the first mating part, the fifth mating part is located behind the second mating part, and the sixth mating part is located in front of the third mating part. The fourth, fifth, and sixth mating parts are capable of sliding along a first concave arc surface, a first convex arc surface, and a second concave arc surface, respectively, so that the first swing arm can rotate relative to the rotating shaft base about the rotation axis between an unfolded position and a folded position.

[0010] In this way, the first concave arc surface, the first convex arc surface, and the second concave arc surface form a virtual slide groove. The first convex arc surface forms the upper arc surface of the virtual slide groove, and the first and second concave arc surfaces form the lower arc surface of the virtual slide groove. The rotating end is set in the virtual slide groove and can slide relative to the rotating shaft base along the virtual slide groove to achieve rotation between the unfolded position and the folded position.

[0011] Based on this, the first concave arc surface, the first convex arc surface, and the second concave arc surface are also staggered along the extension direction of the rotation axis. The fourth mating part is not limited by the upper arc surface, allowing for a larger thickness; the fifth mating part is not limited by the lower arc surface, allowing for a larger thickness; and the sixth mating part is not limited by the upper arc surface, allowing for a larger thickness. This increases the thickness of the rotating end, improves its structural strength, ensures the connection strength between the rotating end and the shaft base, and prevents breakage.

[0012] Meanwhile, the radial distance between the first convex arc surface and the first concave arc surface on the first concave arc surface, and the radial distance between the first convex arc surface and the second concave arc surface on the second concave arc surface can be designed to be smaller, which can reduce the height of the rotating shaft base, thereby facilitating the thinning of electronic devices.

[0013] Furthermore, the contact surfaces between the rotating end and the shaft base are staggered along the extension direction of the rotating axis. Given that the dimensions of the shaft base along the extension direction of the rotating axis are fixed, the contact area between the rotating end and the shaft base is small, resulting in less friction, which can prevent jamming and increase rotational flexibility.

[0014] The radius of the first concave arc surface and the radius of the second concave arc surface can be greater than the radius of the first convex arc surface, less than the radius of the first convex arc surface, or equal to the radius of the first convex arc surface.

[0015] Optionally, the back side of the fourth mating part is a second convex arc surface, which mates with the first concave arc surface. The front side of the fifth mating part is a third concave arc surface, which mates with the first convex arc surface. The back side of the sixth mating part is a third convex arc surface, which mates with the second concave arc surface. In this way, when the first swing arm rotates relative to the pivot base between the unfolded and folded positions, the second convex arc surface slides relative to the first concave arc surface, the third concave arc surface slides relative to the first convex arc surface, and the third convex arc surface slides relative to the second concave arc surface. This maintains surface-to-surface contact during sliding, reducing stress concentration and preventing jamming.

[0016] Optionally, the radius of the first concave arc surface is equal to the radius of the second concave arc surface. This simplifies the profile of the shaft base and makes it easier to manufacture.

[0017] Optionally, the pivot base also includes a first limiting portion. At least a portion of the first limiting portion is disposed on the front side of the fourth mating portion. The back side of the first limiting portion is a fourth convex arc surface, and the front side of the fourth mating portion is a fourth concave arc surface. The center lines of the fourth convex arc surface and the fourth concave arc surface are both collinear with the axis of rotation, and the fourth convex arc surface and the fourth concave arc surface face each other. In this way, the first limiting portion separates the fourth mating portion from the folding screen, preventing friction, wear, and noise caused by contact movement between the fourth mating portion and the folding screen. Simultaneously, since the fourth convex arc surface of the first limiting portion and the fourth concave arc surface of the fourth mating portion face each other, and the center lines of the fourth convex arc surface and the fourth concave arc surface are both collinear with the axis of rotation, the first limiting portion can prevent interference with the sliding of the fourth mating portion along the first concave arc surface, and also improves structural compactness.

[0018] Optionally, the fourth convex arc surface and the fourth concave arc surface are spaced apart. In this way, the fourth convex arc surface and the fourth concave arc surface do not contact each other, which can reduce the contact area between the fourth mating part and the pivot base, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve the folding feel.

[0019] Optionally, the rotating shaft base further includes a second limiting portion; at least a portion of the second limiting portion is disposed on the back side of the fifth mating portion. The front side of the second limiting portion is a fifth concave arc surface, and the back side of the fifth mating portion is a fifth convex arc surface; the center line of the fifth concave arc surface and the center line of the fifth convex arc surface are collinear with the rotating axis, and the fifth concave arc surface and the fifth convex arc surface face each other.

[0020] The second limiting part can shield and protect the fifth mating part, preventing it from being exposed on the back side of the rotating shaft base, thus ensuring the overall aesthetics of the device. A separate shaft cover is not required on the back side of the rotating shaft base, simplifying the structural complexity, reducing the thickness of the electronic device, and facilitating thinner designs. Simultaneously, the fifth convex arc surface of the fifth mating part faces the fifth concave arc surface of the second limiting part, and the center lines of both the fifth convex and concave arc surfaces are collinear with the rotating shaft axis. Therefore, the second limiting part can prevent interference with the sliding of the fifth mating part along the first convex arc surface, and also improves structural compactness.

[0021] Optionally, the fifth concave arc surface and the fifth convex arc surface are spaced apart. In this way, the fifth convex arc surface and the fifth concave arc surface do not contact each other, which can reduce the contact area between the fifth mating part and the pivot base, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve the folding feel.

[0022] Optionally, the pivot base also includes a fixing part, with the first mating part, the second mating part, and the third mating part located on the same side of the fixing part. The first swing arm also includes a swing arm body, with a rotating end located at one end of the swing arm body. When the first swing arm is in the extended position, the swing arm body and the fixing part are located on opposite sides of the rotating end. This structure is simple and has a reasonable layout.

[0023] Optionally, the width of the swing arm body along the extension direction of the rotation axis is less than the distance between the first mating part and the third mating part along the extension direction of the rotation axis. The end of the first mating part away from the fixed part is the first end, and the end of the third mating part away from the fixed part is the second end. When the first swing arm is in the extended position, the swing arm body is located between the first end and the second end.

[0024] This design achieves several advantages. First, it avoids the thickness overlap between the swing arm body and the first and third mating parts when the first swing arm is in the extended position, thus reducing the thickness of the pivot base. Second, it increases the height of the first and second ends, widening the overlap between the fourth mating part and the first concave surface, and between the sixth mating part and the second concave surface, preventing jamming. Third, the swing arm body is positioned between the first and second ends, meaning they are located on opposite sides of the swing arm body. This allows the first and second ends to connect seamlessly with other parts of the pivot base, preventing local protrusions. Consequently, when the first swing arm is in the extended position, this improves the flatness of the front side of the pivot mechanism, enhancing its reliability during ball drop and sharp-point impacts.

[0025] Optionally, the pivot base is provided with at least one clearance hole, which penetrates the front side of the pivot base. When the first swing arm is in the extended position, the ends of the fourth mating part, the fifth mating part, and the sixth mating part that are away from the swing arm body are accommodated within the at least one clearance hole. By using the at least one clearance hole to allow clearance between the ends of the fourth mating part, the fifth mating part, and the sixth mating part that are away from the swing arm body, the thickness accumulation can be avoided, the thickness of the pivot base can be reduced, and this is beneficial for the thinning of electronic devices.

[0026] Optionally, the pivot base also includes a first connecting portion, which connects the second mating portion and the fixed portion. The end of the fifth mating portion furthest from the main body of the swing arm is the third end, which has a clearance notch. When the first swing arm is in the extended position, the first connecting portion is accommodated within the clearance notch. In this way, by using the first connecting portion to fix the second mating portion to the fixed portion, the second mating portion can be prevented from being suspended in the air, thereby improving structural strength.

[0027] Optionally, the inner wall surface away from the third end of the clearance notch is designated as the first stop surface. When the first swing arm is in the extended position, the first stop surface contacts the back side of the first connecting part. In this way, the first stop surface and the back side of the first connecting part cooperate to stop the first swing arm in the extended position.

[0028] Optionally, the end face of the second limiting part away from the fixed part is a second stop surface. When the first swing arm is in the extended position, the second stop surface contacts the back side of the swing arm body. In this way, by means of the cooperation between the second stop surface and the back side of the swing arm body, the first swing arm can be further stopped in the extended position.

[0029] Optionally, at least one clearance hole includes a first clearance hole and a second clearance hole spaced apart. The arrangement direction of the first clearance hole and the second clearance hole is parallel to the extension direction of the rotation axis, and the first clearance hole and the second clearance hole are located on opposite sides of the first connecting part, respectively. When the first swing arm is in the extended position, the end of the fourth mating part away from the swing arm body is accommodated in the first clearance hole, and the end of the sixth mating part away from the swing arm body is accommodated in the second clearance hole. This layout is reasonable and the structure is simple.

[0030] Optionally, the width of the clearance notch along the extension direction of the rotation axis is smaller than the width of the fifth mating part along the extension direction of the rotation axis. The portion of the fifth mating part between the fourth mating part and the clearance notch is the first sub-part, and the portion of the fifth mating part between the sixth mating part and the clearance notch is the second sub-part. When the first swing arm is in the extended position, the end of the first sub-part away from the swing arm body is accommodated in the first clearance hole, and the end of the second sub-part away from the swing arm body is accommodated in the second clearance hole. In this way, on the one hand, the contact area between the fifth mating part and the first convex surface can be increased by using the first and second sub-parts, avoiding stress concentration. On the other hand, the first and second clearance holes can prevent the first and second sub-parts from having overlapping thicknesses with the base, reducing the thickness of the base and contributing to the overall thinness of the machine.

[0031] Optionally, the rotating end also includes a second connecting portion, which is disposed between the fourth mating portion and the fifth mating portion. In this way, by means of the second connecting portion, the distance between the fourth mating portion and the fifth mating portion in the extension direction of the rotation axis can be increased, thereby improving the structural strength of the rotating end.

[0032] Optionally, the rotating end further includes a first support portion, which is disposed between the fourth mating portion and the second connecting portion. The end of the first support portion away from the main body of the swing arm is the first support end, and a first stop protrusion is provided on the back side of the first support end. The pivot base also includes a second support portion, which is located on the back side of the first support portion and is disposed between the first mating portion and the third mating portion. The end of the second support portion away from the fixed portion is the second support end, and a second stop protrusion is provided on the front side of the second support end. When the first swing arm is in the folded position, the first stop protrusion is located on the side of the second stop protrusion facing the fixed portion and contacts the second stop protrusion. In this way, the first swing arm can be limited when it is in the folded position to prevent it from detaching from the pivot base, thereby ensuring connection stability.

[0033] Optionally, the pivot base is provided with a receiving groove that extends through the front side of the pivot base. At least one of the fourth mating part, the first support part, and the second connecting part is accommodated within the receiving groove. This structure is simple, and the structural strength of the rotating end is relatively high, which can improve the connection strength between the first swing arm and the pivot base.

[0034] Optionally, the pivot base includes an upper base and a lower base located on the back side of the upper base. The upper base and the lower base are fixedly connected. A second mating part constitutes part of the upper base, and a first mating part and a third mating part constitute part of the lower base. In this way, the lower base and the upper base can respectively clamp the rotating end from the front and back sides, which can reduce the assembly difficulty of the pivot base and the rotating end and improve assembly efficiency.

[0035] In a second aspect, an electronic device is provided, comprising a first structural member and a rotating shaft mechanism as described in any of the above technical solutions, wherein a first swing arm of the rotating shaft mechanism is connected to the first structural member in a transmission manner.

[0036] Since the electronic device provided in this application includes the rotating shaft base as described in any of the above technical solutions, both can solve the same technical problem and achieve the same effect.

[0037] Optionally, the electronic device also includes a foldable screen, which includes a first display area and a second display area. A first structural member carries the first display area, and a hinge mechanism carries the second display area, with the second display area located in front of the hinge mechanism. Attached Figure Description

[0038] Figure 1 Perspective views of electronic devices in an unfolded state provided in some embodiments of this application;

[0039] Figure 2 for Figure 1 A partial exploded view of the electronic device shown.

[0040] Figure 3 for Figure 1 The diagram shows the structure of the electronic device in a folded state.

[0041] Figure 4 Assembly diagrams of the internal main frame, sub-frame, hinge mechanism, and folding screen of an electronic device in the unfolded state, provided in some embodiments of this application;

[0042] Figure 5 for Figure 4 A magnified view of a portion of region I in the electronic device shown;

[0043] Figure 6 for Figure 5 The diagram shows the structure of the electronic device when the first swing arm is in the folded position.

[0044] Figure 7 A perspective view of a rotating shaft mechanism provided in some embodiments of this application;

[0045] Figure 8 for Figure 7 The exploded structural diagram of the rotating shaft mechanism shown;

[0046] Figure 9 for Figure 7 The rotating shaft mechanism shown is a perspective sectional view along line AA when the first swing arm is in the folded position.

[0047] Figure 10 for Figure 7The rotating shaft mechanism shown is a perspective sectional view along line BB when the first swing arm is in the folded position.

[0048] Figure 11 for Figure 8 A perspective view of the first swing arm in the rotating shaft mechanism shown;

[0049] Figure 12 for Figure 11 A stereoscopic view of the first swing arm from another perspective;

[0050] Figure 13 for Figure 8 A bottom view of the upper base in the rotating shaft mechanism shown;

[0051] Figure 14 for Figure 8 A perspective view of the lower base in the rotating shaft mechanism shown;

[0052] Figure 15 for Figure 7 A three-dimensional sectional view of the rotating shaft mechanism shown along line CC;

[0053] Figure 16 for Figure 7 The rotating shaft mechanism shown is a perspective sectional view along line DD when the first swing arm is in the folded position.

[0054] Figure 17 A perspective view of a rotating shaft mechanism provided for some embodiments of this application;

[0055] Figure 18 A perspective view of a rotating shaft mechanism provided in some embodiments of this application. Detailed Implementation

[0056] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0057] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0058] In the embodiments of this application, unless otherwise specified, the description of "collinear" means approximately collinear within a certain error range, which can be a range of less than 2 mm relative to the absolute collinearity deviation.

[0059] This application provides an electronic device, which can be user equipment (UE) or terminal equipment, such as a portable Android device (PAD), laptop computer, watch, personal digital assistant (PDA), handheld device with wireless communication function, computing device, in-vehicle device, wearable device, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, and other mobile or fixed terminals.

[0060] The electronic device includes a first structural component, a second structural component, and a rotating shaft mechanism. It should be noted that the electronic device may include other structures besides the first structural component, the second structural component, and the rotating shaft mechanism; no specific limitations are made here.

[0061] The pivot mechanism is connected between the first structural member and the second structural member to enable the first structural member to rotate relative to the second structural member, so that the electronic device can switch between an unfolded state and a folded state.

[0062] The unfolded state refers to the state of the electronic device when the angle between the first structural component and the second structural component is at its maximum. Correspondingly, the folded state refers to the state of the electronic device when the angle between the first structural component and the second structural component is at its minimum.

[0063] The following embodiments are illustrated using foldable screen devices as examples. Specifically, the foldable screen device can be illustrated using a handheld device with wireless communication capabilities, such as a mobile phone.

[0064] Please see Figure 1 and Figure 2 , Figure 1 This is a perspective view of the electronic device 100 provided in some embodiments of this application in its unfolded state. Figure 2 for Figure 1 The diagram shows a partially exploded view of the electronic device 100. In its unfolded state, the electronic device 100 is approximately rectangular flat. For ease of description in the following embodiments, an XYZ coordinate system is established for the electronic device 100 in its unfolded state, defining the length direction of the electronic device 100 as the X-axis, the width direction as the Y-axis, and the thickness direction as the Z-axis. It is understood that the coordinate system setting of the electronic device 100 can be flexibly configured according to actual needs and is not specifically limited here. In other embodiments, the shape of the electronic device 100 may also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0065] The electronic device 100 includes a folding screen 10 and a support device 20.

[0066] The foldable screen 10 is used to display images, videos, and other information. 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), etc.

[0067] The foldable screen 10 has a display area for displaying image information, and the display area of ​​the foldable screen 10 is exposed to facilitate the presentation of images, videos, and other information to the user. The foldable screen 10 includes a first display area 11, a second display area 12, and a third display area 13, with the second display area 12 connected between the first display area 11 and the third display area 13. Figure 1 In the illustrated electronic device 100, the foldable screen 10 is in the unfolded state, with the first display area 11, the second display area 12, and the third display area 13 arranged sequentially along the X-axis, thus the electronic device 100 folds horizontally. In some other embodiments, when the foldable screen 10 is in the unfolded state, the first display area 11, the second display area 12, and the third display area 13 can also be arranged sequentially along the Y-axis, thus the electronic device 100 folds vertically. When the foldable screen 10 is in the unfolded state, a large-screen display can be achieved, providing users with richer information and a better user experience.

[0068] At least the second display area 12 of the foldable screen 10 is a flexible screen structure. Thus, the second display area 12 can bend and deform under external force, allowing the foldable screen 10 to... Figure 1 The unfolded state is folded to the folded state. The first display area 11 and the third display area 13 of the foldable screen 10 can be a flexible screen structure, a rigid screen structure, or a combination of both; no specific limitation is made here.

[0069] Please see Figure 3 , Figure 3 for Figure 1 The diagram shows the structure of the electronic device 100 in a folded state, where the foldable screen 10 is also folded. Specifically, when the foldable screen 10 is folded, the first display area 11 and the third display area 13 of the foldable screen 10 are approximately parallel and opposite to each other. It should be noted that the angle between the first display area 11 and the third display area 13 is within 30°, and they can be considered approximately parallel. The first display area 11 and the third display area 13 being opposite to each other means that the display surface of the first display area 11 faces the display surface of the third display area 13.

[0070] When the foldable screen 10 is in the folded state, please continue reading. Figure 3 The second display area 12 is folded into a teardrop shape. In this shape, the second display area 12 includes an arc segment 123, a first transition segment 121, and a second transition segment 122. The first transition segment 121 connects the arc segment 123 and the first display area 11. The second transition segment 122 connects the arc segment 123 and the third display area 13. The distance between the end of the first transition segment 121 connecting to the first display area 11 and the end of the second transition segment 122 connecting to the third display area 13 is a third distance. The distance between the end of the first transition segment 121 connecting to the arc segment 123 and the end of the second transition segment 122 connecting to the arc segment 123 is a fourth distance, which is greater than the third distance. It is understood that when the electronic device is in a folded state, the second display area 12 of the foldable screen 10 can also be folded into other shapes as needed, and this application does not impose any restrictions on this.

[0071] When electronic device 100 is in a folded state, please continue reading. Figure 3 The support device 20 protects the outside of the folding screen 10, which is invisible to the user and can prevent the folding screen 10 from being scratched by hard objects. This electronic device is an inward folding electronic device, and the size of the electronic device 100 is reduced, making it easy to carry.

[0072] The support device 20 is used to support the foldable screen 10. The support device 20 includes a first housing (i.e., a first structural member) 21, a second housing (i.e., a second structural member) 22, and a pivot mechanism 23. The first housing 21 supports the first display area 11, and the second housing 22 supports the third display area 13. The pivot mechanism 23 is connected between the first housing 21 and the second housing 22 and supports the second display area 12. The pivot mechanism 23 is used to realize the rotation between the second housing 22 and the first housing 21 to support the folding of the foldable screen 10 between the unfolded state and the folded state, and to enable the electronic device 100 to switch between the unfolded state and the folded state.

[0073] When the electronic device is a foldable screen device, the unfolded state can be the state in which the electronic device 100 is located when the angle between the first housing 21 and the second housing 22 is approximately 180°; the folded state can be the state in which the electronic device 100 is located when the angle between the first housing 21 and the second housing 22 is approximately 0°. When the electronic device is another type of device, the angle between the first structural member and the second structural member can also be other angles in the unfolded and folded states, and this application does not specifically limit this.

[0074] In the above embodiments, optionally, the first housing 21 may include a mid-frame and a back cover connected together. The first display area 11 of the foldable screen 10 is supported on the mid-frame of the first housing 21, and the back cover is located on the side of the mid-frame away from the first display area 11. The back cover can be replaced with a display screen (such as an LCD display). A receiving cavity is formed between the mid-frame and the back cover, which is used to accommodate electronic components such as the motherboard, camera module, and battery. Based on this, the first housing 21 can be connected to the hinge mechanism 23 via the mid-frame or via the back cover. The following embodiments are described using the example of the first housing 21 being connected to the hinge mechanism 23 via the mid-frame.

[0075] Similarly, the second housing 22 may also include a mid-frame and a back cover connected together. The third display area 13 of the foldable screen 10 is supported on the mid-frame of the second housing 22, and the back cover is located on the side of the mid-frame away from the third display area 13. The back cover can also be replaced with a display screen (such as an LCD display). A receiving cavity is formed between the mid-frame and the back cover, which is used to accommodate electronic components such as the sub-board, speaker module, array, and battery. Based on this, the second housing 22 can be connected to the hinge mechanism 23 via the mid-frame or via the back cover. The following embodiments are described using the example of the second housing 22 being connected to the hinge mechanism 23 via the mid-frame.

[0076] It should be noted that, in order to distinguish the middle frame of the first housing 21 and the middle frame of the second housing 22, in the description of the embodiments below, the middle frame of the first housing 21 is referred to as the main middle frame, which is denoted as A in the drawings, and the middle frame of the second housing 22 is referred to as the secondary middle frame, which is denoted as B in the drawings.

[0077] Please see Figure 4 , Figure 4 This is an assembly diagram of the internal main frame A, sub-frame B, hinge mechanism 23, and foldable screen 10 of an electronic device 100 provided in some embodiments of this application in its unfolded state. The hinge mechanism 23 includes a hinge base 231, a first swing arm 232, and a second swing arm 233. Figure 4 The central pivot mechanism 23 is cut along the XZ plane at the first swing arm 232 and the second swing arm 233.

[0078] The pivot base 231 provides a positional reference within the pivot mechanism 23. The main frame A is rotatably connected to the pivot base 231 via the first swing arm 232. Specifically, the main frame A can be drivenly connected to the first swing arm 232, which is rotatably connected to the pivot base 231.

[0079] In this embodiment and the embodiments described below, "transmission connection" means that the movement of one component can be transmitted to the other component among the two connected components. The connection between the two components can be a fixed connection, or at least one of the following connection methods, including but not limited to rotational connection, sliding connection, gear meshing transmission connection, sprocket transmission connection, cam mechanism transmission connection, etc.

[0080] Similarly, the sub-middle frame B is rotatably connected to the rotating shaft base 231 via the second swing arm 233. Specifically, the sub-middle frame B is connected to the second swing arm 233 via a transmission, and the second swing arm 233 is rotatably connected to the rotating shaft base 231.

[0081] The main frame A and the secondary frame B can rotate relative to the pivot base 231 via the first swing arm 232 and the second swing arm 233, respectively, so that the electronic device 100 can move between an unfolded state and a folded state. When the electronic device 100 is in the unfolded state, the first swing arm 232, the main frame A, the second swing arm 233, and the secondary frame B are all in the unfolded position; when the electronic device 100 is in the folded state, the first swing arm 232, the main frame A, the second swing arm 233, and the secondary frame B are all in the folded position.

[0082] In some embodiments, the connection method of the main frame A, the first swing arm 232, and the pivot base 231 can be the same as the connection method of the sub-frame B, the second swing arm 233, and the pivot base 231, which can reduce structural complexity and assembly difficulty.

[0083] Of course, in other embodiments, the connection method of the main frame A, the first swing arm 232, and the pivot base 231 may be different from the connection method of the sub-frame B, the second swing arm 233, and the pivot base 231. The embodiments described below are exemplified by assuming that the connection method of the main frame A, the first swing arm 232, and the pivot base 231 is the same as the connection method of the sub-frame B, the second swing arm 233, and the pivot base 231.

[0084] Based on this, the following mainly describes the connection method of the main middle frame A, the first swing arm 232, and the pivot base 231. The connection method of the sub-middle frame B, the second swing arm 233, and the pivot base 231 can be implemented with reference to the connection method of the main middle frame A, the first swing arm 232, and the pivot base 231. This application will not elaborate on this.

[0085] Please see Figure 5 , Figure 5 for Figure 4 This is a partial enlarged view of region I in the electronic device 100 shown. The rotating base 231 has an arc-shaped groove C. The first swing arm 232 includes a swing arm body 2321 and a rotating end 2322 connected to one end of the swing arm body 2321. The rotating end 2322 is accommodated in the arc-shaped groove C and can slide along the arc-shaped groove C, so that the first swing arm 232 can rotate relative to the rotating base 231 between an unfolded position and a folded position. Figure 5 In the middle, the first swing arm 232 is in the extended position, please refer to... Figure 6 , Figure 6 for Figure 5 The diagram shows the structure of the electronic device 100 when the first swing arm 232 is in the folded position.

[0086] Within the aforementioned rotating shaft mechanism 23, the structural strength of the connection between the first swing arm 232 and the rotating shaft base 231 affects the overall structural strength of the device. However, as the overall device becomes thinner, the thickness H of the rotating shaft base 231 gradually decreases, and the thickness d1 of the arc-shaped groove C within the rotating shaft base 231 that mates with the first swing arm 232 also decreases accordingly. Furthermore, the thickness d2 of the rotating end 2322 of the first swing arm 232 also becomes increasingly thinner. This results in lower structural strength at the connection point, making it prone to breakage. Therefore, the electronic device 100 cannot simultaneously achieve a thinner overall device while maintaining the structural strength of the connection between the first swing arm 232 and the rotating shaft base 231 within the rotating shaft mechanism 23.

[0087] To resolve the above issues, please refer to Figure 7 and Figure 8 , Figure 7 This is a perspective view of the rotating shaft mechanism 23 provided in some embodiments of this application. Figure 8 for Figure 7The diagram shows an exploded view of the rotating shaft mechanism 23. The rotating shaft mechanism 23 includes a rotating shaft base 231, a first swing arm 232, and a second swing arm 233.

[0088] It should be noted that in the following embodiments, the term "front side" used to describe the pivot mechanism 23 and its various parts refers to the side of the object being described facing the folding screen 10, "front side" refers to the surface of the object being described facing the folding screen 10, "back side" refers to the side of the object being described that is away from the folding screen 10, and "back side" refers to the surface of the object being described that is away from the folding screen 10. These terms will not be elaborated upon in the following text.

[0089] Additionally, it should be noted that, Figures 7-8 The rotating shaft mechanism 23 includes some components, the actual shape, size, position, and structure of which are not subject to change. Figures 7-8 The rotating shaft mechanism 23 includes, in addition to the limitations, Figures 7-8 In addition to the components shown, other components may also be included, such as shaft covers, secondary swing arms, synchronization mechanisms, and damping mechanisms, etc. This application does not specifically limit these components.

[0090] Based on the above, please refer to the following: Figure 8 The pivot base 231 provides a positional reference within the pivot mechanism 23. The pivot base 231 can be made of metal materials such as stainless steel, aluminum alloy, or magnesium-aluminum alloy, or non-metallic materials such as polycarbonate (PC), PC+glass fiber, or ABS plastic (acrylonitrile butadiene styrene plastic). The pivot base 231 includes a first mating part 2311, a second mating part 2312, and a third mating part 2313 arranged sequentially along the extension direction of the pivot axis.

[0091] The first mating part 2311 has a front side surface of a first concave arc surface m1, which is recessed towards the back side. The second mating part 2312 has a back side surface of a first convex arc surface n1, which is convex towards the back side. The third mating part 2313 has a front side surface of a second concave arc surface m2, which is recessed towards the back side.

[0092] The center lines of the first concave arc surface m1, the first convex arc surface n1, and the second concave arc surface m2 are all collinear with the axis of rotation. The radii of the first concave arc surface m1 and the second concave arc surface m2 can be greater than, less than, or equal to the radius of the first convex arc surface n1. This application uses the example of the first concave arc surface m1 and the second concave arc surface m2 being greater than the radius of the first convex arc surface n1 as an example, which should not be considered as a special limitation on this application.

[0093] Based on the above, please continue to refer to... Figure 8 The first swing arm 232 includes a rotating end 2322, which includes a fourth mating part 2322a, a fifth mating part 2322b and a sixth mating part 2322c.

[0094] Please see Figure 9 , Figure 9 for Figure 7 The diagram shows a perspective sectional view of the pivot mechanism 23 along line AA when the first swing arm 232 is in the folded position. The fourth mating part 2322a is located in front of the first mating part 2311. Please refer to [link / reference]. Figure 10 , Figure 10 for Figure 7 The diagram shows a perspective sectional view of the pivot mechanism 23 along line BB when the first swing arm 232 is in the folded position. The fifth mating part 2322b is located on the back side of the second mating part 2312. The sixth mating part 2322c is located on the front side of the third mating part 2313.

[0095] Based on this, the fourth mating part 2322a, the fifth mating part 2322b and the sixth mating part 2322c can slide along the first concave arc surface m1, the first convex arc surface n1 and the second concave arc surface m2 respectively, so that the first swing arm 232 can rotate relative to the rotating shaft base 231 around the rotation axis between the unfolded position and the folded position.

[0096] In this way, the first concave arc surface m1, the first convex arc surface n1, and the second concave arc surface m2 form a virtual slide groove. The first convex arc surface n1 forms the upper arc surface of the virtual slide groove, and the first concave arc surface m1 and the second concave arc surface m2 form the lower arc surface of the virtual slide groove. The rotating end 2322 is disposed in the virtual slide groove and can slide relative to the rotating shaft base 231 along the virtual slide groove to achieve rotation between the unfolded position and the folded position.

[0097] Based on this, the first mating part 2311, the second mating part 2312, and the third mating part 2313 are arranged sequentially along the extension direction of the rotation axis. The first concave arc surface m1, the first convex arc surface n1, and the second concave arc surface m2 are also staggered along the extension direction of the rotation axis. Therefore, the fourth mating part 2322a is not limited by the upper arc surface, and its thickness can be made larger; the fifth mating part 2322b is not limited by the lower arc surface, and its thickness can be made larger; and the sixth mating part 2322c is not limited by the upper arc surface, and its thickness can be made larger. As a result, the thickness of the rotating end 2322 can be increased, the structural strength of the rotating end 2322 can be improved, the connection strength between the rotating end 2322 and the rotating shaft base 231 can be guaranteed, and breakage can be prevented.

[0098] Meanwhile, the radial distance between the first convex arc surface n1 and the first concave arc surface m1, and the radial distance between the first convex arc surface n1 and the second concave arc surface m2, can be designed to be smaller, which can reduce the height of the rotating shaft base 231, thereby facilitating the thinning of the electronic device 100.

[0099] Furthermore, the contact surfaces of the rotating end 2322 and the rotating shaft base 231 are staggered along the extension direction of the rotating axis. Under the premise that the dimensions of the rotating shaft base 231 along the extension direction of the rotating axis are fixed, the contact area between the rotating end 2322 and the rotating shaft base 231 is small, the friction is small, which can avoid jamming and increase the rotation flexibility.

[0100] In the above embodiments, the fourth mating part 2322a, the fifth mating part 2322b and the sixth mating part 2322c can be in the form of a slider, a convex ball, a cylinder, a roller, a wheel, etc., and this application does not make specific limitations in this regard.

[0101] In some embodiments, please refer to Figure 11 and Figure 12 , Figure 11 for Figure 8 A perspective view of the first swing arm 232 in the rotating shaft mechanism 23 shown. Figure 12 for Figure 11 The first swing arm 232 shown is a stereoscopic view from another perspective.

[0102] The back side of the fourth mating part 2322a is a second convex arc surface n2, which protrudes towards the back side and is in contact with the first concave arc surface m1.

[0103] Similarly, the front side of the fifth mating part 2322b is a third concave arc surface m3, which is recessed to the back side and makes mating contact with the first convex arc surface n1.

[0104] The back side of the sixth mating part 2322c is a third convex arc surface n3, which protrudes towards the back side and is in contact with the second concave arc surface m2.

[0105] In this way, when the first swing arm 232 rotates between the unfolded position and the folded position relative to the pivot base 231, the second convex arc surface n2 slides relative to the first concave arc surface m1, the third concave arc surface m3 slides relative to the first convex arc surface n1, and the third convex arc surface n3 slides relative to the second concave arc surface m2. Thus, during the sliding process, the surfaces are kept in contact, which can reduce stress concentration and avoid jamming or other situations during the sliding process.

[0106] In some embodiments, please refer to the following: Figure 8 , Figure 10 and Figure 11 The radius of the first concave arc surface m1 can be equal to the radius of the second concave arc surface m2, and correspondingly, the radius of the second convex arc surface n2 can be equal to the radius of the third convex arc surface n3. This results in a simple profile for the rotating shaft base 231, making it easy to machine.

[0107] Of course, in some other embodiments, the radius of the first concave arc surface m1 may be different from the radius of the second concave arc surface m2, and correspondingly, the radius of the second convex arc surface n2 may be different from the radius of the third convex arc surface n3. This application does not make specific limitations in this regard.

[0108] In the above embodiments, the rotating shaft base 231 can be a single structural component or can be assembled from multiple components.

[0109] In some embodiments, please refer to the following: Figure 8 The rotating shaft base 231 may include an upper base 231a and a lower base 231b. The lower base 231b is located on the back side of the upper base 231a and is fixedly connected to the upper base 231a. Specifically, the lower base 231b can be fixedly connected to the upper base 231a by a non-removable connection method such as welding or bonding, or by a detachable connection method such as threaded connection or snap-fit. This application exemplifies the use of a detachable connection method to fix the lower base 231b to the upper base 231a. For details, please refer to [link to relevant documentation]. Figure 8 The lower base 231b can be connected to the upper base 231a with screws. This facilitates disassembly, maintenance, replacement, or cleaning of accumulated dust.

[0110] Based on the above, please continue to refer to... Figure 8 The first mating part 2311 and the third mating part 2313 can form part of the lower base 231b, and the second mating part 2312 can form part of the upper base 231a. In this way, the lower base 231b and the upper base 231a can respectively clamp the rotating end 2322 from the front and back sides, so that the fourth mating part 2322a is located on the front side of the first mating part 2311, the fifth mating part 2322b is located on the back side of the second mating part 2312, and the sixth mating part 2322c is located on the front side of the third mating part 2313. This reduces the assembly difficulty of the rotating shaft base 231 and the rotating end 2322, and improves assembly efficiency.

[0111] It should be noted that, in addition to being composed of an upper base 231a and a lower base 231b, the pivot base 231 may also have other assembly methods, which are not specifically limited in this application.

[0112] In some embodiments, please refer to Figure 8The rotating shaft base 231 may also include a first limiting part 2314, a second limiting part 2315 and a third limiting part 2316.

[0113] At least a portion of the first limiting portion 2314 is disposed on the front side of the fourth mating portion 2322a. Specifically, the first limiting portion 2314 may be entirely disposed on the front side of the fourth mating portion 2322a, or a portion may be disposed on the front side of the fourth mating portion 2322a. This embodiment is illustrated by exemplifying that a portion of the first limiting portion 2314 is disposed on the front side of the fourth mating portion 2322a, which should not be considered as a special limitation of this application.

[0114] Please see Figure 13 , Figure 13 for Figure 8 The bottom view of the upper base 231a in the rotating shaft mechanism shown shows that the back side of the first limiting part 2314 is the fourth convex arc surface n4. Please refer back to the previous section. Figure 11 The front side of the fourth mating part 2322a is the fourth concave arc surface m4.

[0115] Please return to the reference. Figure 9 The center lines of the fourth convex arc surface n4 and the fourth concave arc surface m4 are both collinear with the axis of rotation, and the fourth convex arc surface n4 and the fourth concave arc surface m4 face each other.

[0116] In this way, the fourth mating part 2322a can be separated from the folding screen 10 by means of the first limiting part 2314, which can prevent the fourth mating part 2322a from generating relative movement with the folding screen 10 and generating friction, wear and noise during the sliding process along the first concave arc surface m1.

[0117] Meanwhile, since the back side of the first limiting part 2314 is the fourth convex arc surface n4 and the front side of the fourth mating part 2322a is the fourth concave arc surface m4, the center lines of the fourth convex arc surface n4 and the fourth concave arc surface m4 are both collinear with the axis of rotation. Therefore, the first limiting part 2314 can avoid interfering with the sliding of the fourth mating part 2322a along the first concave arc surface m1, and the structural compactness can be improved.

[0118] Furthermore, the first limiting part 2314 can limit the fourth mating part 2322a, preventing one end of the fourth mating part 2322a from tilting relative to the other end during the sliding of the fourth mating part 2322a along the extension direction of the rotation axis. In addition, the first limiting part 2314 can improve the structural strength of the rotating shaft base 231.

[0119] In the above embodiments, the fourth convex arc surface n4 and the fourth concave arc surface m4 can be spaced apart or in direct contact. This application uses the spaced-apart arrangement of the fourth convex arc surface n4 and the fourth concave arc surface m4 as an example. The gap width between the fourth convex arc surface n4 and the fourth concave arc surface m4 can be less than or equal to 2mm. Specifically, the gap width can be 0.1mm, 0.5mm, 1mm, 1.5mm, or 2mm. This prevents the fourth convex arc surface n4 and the fourth concave arc surface m4 from contacting each other, reducing the contact area between the fourth mating part 2322a and the rotating shaft base 231, reducing sliding friction, decreasing wear, extending service life, reducing the possibility of jamming, and improving the folding feel.

[0120] Additionally, please see Figure 13 The aforementioned first limiting part 2314 can be disposed on the upper base 231a. This structure is simple and easy to assemble.

[0121] Please return to the reference. Figure 8 At least a portion of the second limiting portion 2315 is disposed on the back side of the fifth mating portion 2322b. Specifically, the second limiting portion 2315 may be entirely disposed on the back side of the fifth mating portion 2322b, or a portion may be disposed on the back side of the fifth mating portion 2322b. This embodiment is illustrated by exemplarily using a portion of the second limiting portion 2315 disposed on the back side of the fifth mating portion 2322b, which should not be considered as a special limitation constituting this application.

[0122] Please see Figure 12 The back surface of the fifth mating part 2322b is approximately the fifth convex arc surface n5. Please refer to [link / reference]. Figure 14 , Figure 14 for Figure 8 The three-dimensional view of the lower base 231b in the rotating shaft mechanism 23 shown shows that the front side of the second limiting part 2315 is the fifth concave arc surface m5.

[0123] Please see Figure 10 The center lines of the fifth convex arc surface n5 and the fifth concave arc surface m5 are both collinear with the axis of rotation, and the fifth convex arc surface n5 and the fifth concave arc surface m5 face each other.

[0124] In this way, the second limiting part 2315 can cover and protect the fifth mating part 2322b, preventing the fifth mating part 2322b from being exposed on the back side of the rotating shaft base 231, thereby ensuring the aesthetics of the whole machine. The shaft cover does not need to be set on the back side of the rotating shaft base 231, thus simplifying the structural complexity, reducing the thickness of the electronic device 100, and facilitating thinner design.

[0125] Meanwhile, since the back side of the fifth mating part 2322b is approximately the fifth convex arc surface n5, and the front side of the second limiting part 2315 is the fifth concave arc surface m5, the center lines of the fifth convex arc surface n5 and the fifth concave arc surface m5 are both collinear with the axis of rotation. Therefore, the second limiting part 2315 can avoid interfering with the sliding of the fifth mating part 2322b along the first convex arc surface n1, and can also improve the structural compactness.

[0126] Furthermore, the structural strength of the pivot base 231 can be improved by means of the second limiting part 2315.

[0127] In the above embodiments, the fifth convex arc surface n5 and the fifth concave arc surface m5 can be spaced apart or in direct contact. This application illustrates this by exemplifying the spaced-apart arrangement of the fifth convex arc surface n5 and the fifth concave arc surface m5. The gap width between the fifth convex arc surface n5 and the fifth concave arc surface m5 can be less than or equal to 2mm. Specifically, the gap width can be 0.1mm, 0.5mm, 1mm, 1.5mm, or 2mm. This prevents the fifth convex arc surface n5 and the fifth concave arc surface m5 from contacting each other, reducing the contact area between the fifth mating part 2322b and the rotating shaft base 231, reducing sliding friction, decreasing wear, extending service life, reducing the possibility of jamming, and improving the folding feel.

[0128] Additionally, please see Figure 14 The aforementioned second limiting part 2315 can be disposed on the lower base 231b. This structure is simple and easy to assemble.

[0129] Similarly, please refer back to the previous section. Figure 8 At least a portion of the third limiting portion 2316 is disposed on the front side of the sixth mating portion 2322c. Specifically, the third limiting portion 2316 may be entirely disposed on the front side of the sixth mating portion 2322c, or a portion may be disposed on the front side of the sixth mating portion 2322c. This embodiment is illustrated by exemplarily using a portion of the third limiting portion 2316 disposed on the front side of the sixth mating portion 2322c, which should not be considered as a special limitation of this application.

[0130] Please see Figure 13 The rear side of the third limiting part 2316 is the sixth convex arc surface n6. Please refer to [link / reference]. Figure 11 The front side of the sixth mating part 2322c is the sixth concave arc surface m6.

[0131] In Figure 13 The upper base 231a shown and Figure 11 The first swing arm 232 shown is applied to Figure 8 When assembling the structure as shown, the center line of the sixth convex arc surface n6 and the center line of the sixth concave arc surface m6 are both collinear with the axis of rotation, and the sixth convex arc surface n6 and the sixth concave arc surface m6 face each other.

[0132] In this way, the sixth mating part 2322c can be separated from the folding screen 10 by means of the third limiting part 2316, so as to avoid the sixth mating part 2322c from generating relative movement with the folding screen 10 and generating friction, wear and noise during the sliding process along the second concave arc surface m2.

[0133] Meanwhile, since the back side of the third limiting part 2316 is the sixth convex arc surface n6 and the front side of the sixth mating part 2322c is the sixth concave arc surface m6, the center lines of the sixth convex arc surface n6 and the sixth concave arc surface m6 are both collinear with the axis of rotation. Therefore, the third limiting part 2316 can avoid interfering with the sliding of the sixth mating part 2322c along the second concave arc surface m2, and the structural compactness can be improved.

[0134] Furthermore, the third limiting part 2316 can limit the sixth mating part 2322c, preventing one end of the sixth mating part 2322c from tilting relative to the other end during the sliding of the sixth mating part 2322c along the extension direction of the rotation axis. In addition, the structural strength of the rotating shaft base 231 can be improved by means of the third limiting part 2316.

[0135] In the above embodiments, the sixth convex arc surface n6 and the sixth concave arc surface m6 can be spaced apart or in direct contact. This application exemplifies this by showing the sixth convex arc surface n6 and the sixth concave arc surface m6 spaced apart. The gap width between the sixth convex arc surface n6 and the sixth concave arc surface m6 can be less than or equal to 2mm. Specifically, the gap width can be 0.1mm, 0.5mm, 1mm, 1.5mm, or 2mm. This prevents the sixth convex arc surface n6 and the sixth concave arc surface m6 from contacting each other, reducing the contact area between the sixth mating part 2322c and the rotating shaft base 231, reducing sliding friction, decreasing wear, extending service life, reducing the possibility of jamming, and improving the folding feel.

[0136] Additionally, please see Figure 13 The aforementioned third limiting part 2316 can be disposed on the upper base 231a. This structure is simple and easy to assemble.

[0137] In some other embodiments, the pivot base 231 may form openings on the front side of the fourth limiting part 2322a, the back side of the fifth limiting part 2322b, and the front side of the sixth limiting part 2322c. This application does not specifically limit this.

[0138] In some embodiments, please refer back to the reference. Figure 8The rotating shaft base 231 may further include a fixing part 2317. Specifically, the fixing part 2317 may include an upper fixing part 2317a and a lower fixing part 2317b. The upper fixing part 2317a forms part of the upper base 231a, and the lower fixing part 2317b forms part of the lower base 231b. A fixed connection structure between the upper base 231a and the lower base 231b is provided between the upper fixing part 2317a and the lower fixing part 2317b.

[0139] Based on the above, the first mating part 2311, the second mating part 2312, the third mating part 2313, and the first limiting part 2314, the second limiting part 2315, and the third limiting part 2316 are disposed on the same side of the fixing part 2317. Moreover, the first limiting part 2314, the second mating part 2312, and the third limiting part 2316 are connected to the upper fixing part 2317a and located on the same side of the upper fixing part 2317a, and the first mating part 2311, the second limiting part 2315, and the third mating part 2313 are connected to the lower fixing part 2317b and located on the same side of the lower fixing part 2317b.

[0140] Based on this, please continue reading Figure 8 The first swing arm 232 also includes a swing arm body 2321, with a rotating end 2322 disposed at one end of the swing arm body 2321. When the first swing arm 232 is in the extended position, please refer to... Figure 7 The main body 2321 of the swing arm and the fixed part 2317 are located on opposite sides of the rotating end 2322. This structure is simple and has a reasonable layout.

[0141] Based on the above embodiments, please continue to refer to Figure 7 The width w1 of the swing arm body 2321 along the extension direction of the rotation axis is less than the distance w2 between the first mating part 2311 and the third mating part 2313 along the extension direction of the rotation axis.

[0142] Based on this, the end of the first mating part 2311 that is furthest from the fixing part 2317 is the first end D1, and the end of the third mating part 2313 that is furthest from the fixing part 2317 is the second end D2. When the first swing arm 232 is in the extended position, please refer to... Figure 7 The main body of the swing arm 2321 is located between the first end D1 and the second end D2.

[0143] This approach avoids the thickness overlap between the swing arm body 2321 and the first mating part 2311 and the third mating part 2313 when the first swing arm 232 is in the extended position, thus reducing the thickness of the pivot base 231. Furthermore, it increases the height of the first end D1 and the second end D2. When the first swing arm 232 is in the folded position, please refer to [reference needed]. Figure 9This increases the overlap width between the fourth mating part 2322a and the first concave arc surface m1, and between the sixth mating part 2322c and the second concave arc surface m2, preventing jamming. Furthermore, the swing arm body 2321 is located between the first end D1 and the second end D2; in other words, the first end D1 and the second end D2 are located on opposite sides of the swing arm body 2321. This allows the first end D1 and the second end D2 to connect with other parts of the pivot base 231, avoiding local protrusions. Consequently, when the first swing arm 232 is in the extended position, the flatness of the front side of the pivot mechanism 23 is improved, enhancing the reliability of the pivot mechanism 23 during ball drop and sharp impact.

[0144] In some embodiments, please refer to Figure 7 and Figure 8 The pivot base 231 is provided with at least one clearance hole c1. "At least one" indicates one or more holes. At least one clearance hole c1 penetrates the front side of the pivot base 231. In some embodiments, please refer to [the relevant documentation / reference needed]. Figure 8 At least one clearance hole c is provided on the upper base 231a.

[0145] Based on this, when the first swing arm 232 is in the extended position, please refer to... Figure 7 and Figure 8 The end of the fourth mating part 2322a that is away from the swing arm body 2321, the end of the fifth mating part 2322b that is away from the swing arm body 2321, and the end of the sixth mating part 2322c that is away from the swing arm body 2321 are accommodated in the at least one clearance hole c1.

[0146] In this way, by using the at least one clearance hole c1 to avoid the ends of the fourth mating part 2322a that are away from the swing arm body 2321, the ends of the fifth mating part 2322b that are away from the swing arm body 2321, and the ends of the sixth mating part 2322c that are away from the swing arm body 2321, the thickness accumulation can be avoided, the thickness of the rotating shaft base 231 can be reduced, and the thinning of the electronic device 100 is beneficial.

[0147] In some embodiments, please continue reading Figure 7 and Figure 8 The pivot base 231 also includes a first connecting portion 2318, which is connected between the second mating portion 2312 and the fixing portion 2317. Specifically, the first connecting portion 2318 can be connected between the second mating portion 2312 and the upper fixing portion 2317a.

[0148] Based on the above, please refer to Figure 11 The end of the fifth mating part 2322b that is away from the main body 2321 of the swing arm is the third end D3, and the third end D3 is provided with an avoidance notch c2.

[0149] When the first swing arm 232 is in the extended position, please refer to Figure 15 , Figure 15 for Figure 7 The three-dimensional sectional view of the rotating shaft mechanism 23 along line CC shows that the first connecting part 2318 is accommodated in the clearance notch c2.

[0150] In this way, by using the first connecting part 2318 to fix the second mating part 2312 to the fixing part 2317, the second mating part 2312 can be prevented from being suspended and the structural strength can be improved.

[0151] Based on the above embodiments, please refer back to the previous section. Figure 11 The inner wall surface of the notch c2, away from the third end D3, is the first stop surface mk. When the first swing arm 232 is in the extended position, please refer to [further details]. Figure 15 The first stop surface mk contacts the back side of the first connecting part 2318. In this way, the first stop surface mk and the back side of the first connecting part 2318 cooperate to stop the first swing arm 232.

[0152] In some embodiments, please refer back to the reference. Figure 14 The end face of the second limiting part 2315 away from the fixing part 2317 is the second stop surface mj. When the first swing arm 232 is in the extended position, please refer to [the documentation / reference needed]. Figure 15 The second stop surface mj contacts the back side of the swing arm body 2321. In this way, by means of the cooperation between the second stop surface mj and the back side of the swing arm body 2321, the first swing arm 232 can be further stopped.

[0153] In other embodiments, the second mating part 2312 and the fixing part 2317 may also be spaced apart, and the gap between the second mating part 2312 and the fixing part 2317 forms part of the above-mentioned at least one clearance hole c1.

[0154] The embodiments described below are further limitations based on the fact that a first connecting part 2318 is connected between the second mating part 2312 and the fixing part 2317. This should not be considered as a special limitation on the specific structural configuration of the rotating shaft mechanism 23.

[0155] Please return to the reference. Figure 7 and Figure 8 The aforementioned at least one clearance hole c1 includes a first clearance hole c11 and a second clearance hole c12 arranged at intervals. The arrangement direction of the first clearance hole c11 and the second clearance hole c12 is parallel to the extension direction of the rotation axis, and the first clearance hole c11 and the second clearance hole c12 are respectively located on opposite sides of the first connecting portion 2318.

[0156] Moreover, please see Figure 7 The first clearance hole c11 is located between the first limiting part 2314 and the upper fixing part 2317a, and the second clearance hole c12 is located between the third limiting part 2316 and the upper fixing part 2317a.

[0157] Based on the above, when the first swing arm 232 is in the extended position, please refer to... Figure 7 The end of the fourth mating part 2322a that is away from the main body 2321 of the swing arm is housed in the first clearance hole c11, and the end of the sixth mating part 2322c that is away from the main body 2321 of the swing arm is housed in the second clearance hole c12.

[0158] This layout is reasonable and the structure is simple.

[0159] Based on the above embodiments, please refer to Figure 11 The width w3 of the clearance notch c2 along the extension direction of the rotation axis is less than the width w4 of the fifth mating part 2322b along the extension direction of the rotation axis.

[0160] Based on this, please continue reading Figure 11 The fifth mating part between the fourth mating part 2322a and the clearance gap c2 is defined as the first sub-part K1, and the fifth mating part between the sixth mating part 2322c and the clearance gap c2 is defined as the second sub-part K2.

[0161] When the first swing arm 232 is in the extended position, please refer back to the previous section. Figure 7 The end of the first sub-part K1 that is away from the main body 2321 of the swing arm is housed in the first clearance hole c11, and the end of the second sub-part K2 that is away from the main body 2321 of the swing arm is housed in the second clearance hole c12.

[0162] In this way, on the one hand, the contact area between the fifth mating part 2322b and the first convex arc surface n1 can be increased by using the first sub-part K1 and the second sub-part K2, thus avoiding stress concentration. On the other hand, the first clearance hole c11 and the second clearance hole c12 can prevent the first sub-part K1, the second sub-part K2 and the base 231 from having overlapping thicknesses, thereby reducing the thickness of the base 231 and contributing to the overall thinness of the machine.

[0163] In some embodiments, please refer to Figure 11 The rotating end 2322 of the first swing arm 232 also includes a second connecting part 2322d, which is disposed between the fourth mating part 2322a and the fifth mating part 2322b.

[0164] In this way, by means of the second connecting part 2322d, the distance between the fourth mating part 2322a and the fifth mating part 2322b in the extension direction of the rotation axis can be increased, thereby improving the structural strength of the rotating end 2322.

[0165] Based on the above, please refer back to the previous section. Figure 8 Another part of the first limiting part 2314 is located in front of the second connecting part 2322d.

[0166] Based on this, please continue reading Figure 11 The front side of the second connecting part 2322d is a concave arc surface, which is coplanar with the fourth concave arc surface m4, and the concave arc surface faces the fourth convex arc surface n4 of the first limiting part 2314.

[0167] In this way, the second connecting part 2322d can be separated from the folding screen 10 by means of the first limiting part 2314, so as to avoid the second connecting part 2322d from moving relative to the folding screen 10 during the movement of the fourth mating part 2322a and the fifth mating part 2322b, which would cause friction, wear and noise.

[0168] In some embodiments, please refer to Figure 12 The back side of the second connecting part 2322d is coplanar with the fifth convex arc surface n5. In this way, the second connecting part 2322d has a larger thickness, which can improve the structural strength of the rotating end 2322. At the same time, the first swing arm 232 has a simple shape, which can reduce the processing difficulty and cost.

[0169] In some embodiments, please refer to Figure 8 Another part of the second limiting part 2315 is located on the back side of the second connecting part 2322d. In this way, the second limiting part 2315 can also cover and protect the second connecting part 2322d, preventing the second connecting part 2322d from being exposed on the back side of the rotating shaft base 231, thereby ensuring the aesthetics of the whole machine.

[0170] In some embodiments, please refer to the following: Figure 7 The end of the second connecting portion 2322d that is away from the swing arm body 2321 is accommodated in the first clearance hole c11. In this way, the first clearance hole c11 can provide clearance for the end of the second connecting portion 2322d that is away from the swing arm body 2321, avoid the accumulation of thickness, and reduce the thickness of the pivot base 231.

[0171] In some other embodiments, the pivot base 231 may also form an opening on the front side of the second connecting portion 2322d, which is not specifically limited in this application.

[0172] In some embodiments, please continue reading Figure 11 The rotating end 2322 also includes a first support portion 2322e, which is disposed between the fourth mating portion 2322a and the second connecting portion 2322d.

[0173] Based on this, please refer to Figure 12 The end of the first support portion 2322e that is away from the main body 2321 of the swing arm is defined as the first support end D4, and the back side of the first support end D4 is provided with a first stop protrusion N1.

[0174] Accordingly, please refer to Figure 14 The pivot base 231 also includes a second support portion 2319, which is located at... Figure 11 The back side of the first support portion 2322e is shown, and the second support portion 2319 is connected between the first mating portion 2311 and the third mating portion 2313. Specifically, the second support portion 2319 can be connected between the first mating portion 2311 and the second limiting portion 2315. The end of the second support portion 2319 away from the fixing portion 2317 is defined as the second support end D5, and the front side of the second support end D5 is provided with a second stop protrusion N2.

[0175] When the first swing arm 232 is in the folded position, please refer to Figure 16 , Figure 16 for Figure 7 The rotating shaft mechanism 23 shown is a perspective cross-sectional view along line DD when the first swing arm 232 is in the folded position. The first stop protrusion N1 is located on the side of the second stop protrusion N2 facing the fixing part 2317 and is in contact with the second stop protrusion N2.

[0176] In this way, the first swing arm 232 can be limited when it is in the folded position, preventing the first swing arm 232 from detaching from the pivot base 231, thereby ensuring connection stability.

[0177] In the above embodiments, optionally, please refer to Figure 12 The back surface of the first support portion 2322e can be coplanar with the back surface of the fourth mating portion 2322a (i.e., the second convex arc surface n2). Please refer to [link / reference]. Figure 14 The front side of the second support part 2319 can be coplanar with the front side of the second limiting part 2315 (that is, the fifth concave arc surface m5).

[0178] In this way, the shapes of the first swing arm 232 and the rotating shaft base 231 are simple, which can reduce the processing difficulty and cost.

[0179] In some embodiments, when the first swing arm 232 is in the extended position, please refer back to the previous section. Figure 7 The first support end D4 and the first stop protrusion N1 can be accommodated within the first clearance hole c11. This avoids thickness accumulation, reduces the thickness of the rotating shaft base 231, and contributes to the overall thinness of the machine.

[0180] In some embodiments, please refer to Figure 11The rotating end 2322 also includes a third connecting portion 2322f, which is disposed between the fifth mating portion 2322b and the sixth mating portion 2322c. The structure of the third connecting portion 2322f can be the same as that of the second connecting portion 2322d, and will not be described in detail here.

[0181] Please continue reading. Figure 11 The rotating end 2322 also includes a third support portion 2322g, which is disposed between the third connecting portion 2322f and the sixth mating portion 2322c, and has a third stop protrusion N3. The structure of the third support portion 2322g can be the same as that of the first support portion 2322e, and the structure of the third stop protrusion N3 can be the same as that of the first stop protrusion N1, which will not be described in detail here.

[0182] Based on the above, please refer to Figure 14 The pivot base 231 also includes a fourth support portion 2320, which is located at... Figure 11 and Figure 12 The third support portion 2322g is shown on the back side, and the fourth support portion 2320 is connected between the third mating portion 2313 and the first mating portion 2311. Specifically, the fourth support portion 2320 is connected between the third mating portion 2313 and the second limiting portion 2315, and the fourth support portion 2320 is provided with a fourth stop protrusion N4. The structure of the fourth support portion 2320 can be the same as the structure of the second support portion 2319, and the structure of the fourth stop protrusion N4 can be the same as the structure of the second stop protrusion N2, which will not be described in detail here. The fourth stop protrusion N4 cooperates with the third stop protrusion N3 to further limit the first swing arm 232 when it is in the folded position.

[0183] In some embodiments, please refer to Figure 13 The upper base 231a is provided with at least one limiting post, which optionally includes a first limiting post h1 and a second limiting post h2. Accordingly, please refer to... Figure 14 The lower base 231b is provided with at least one limiting hole. Optionally, the at least one limiting hole includes a first limiting hole f1 and a second limiting hole f2. The first limiting hole f1 is used to cooperate with the first limiting post h1, and the second limiting hole f2 is used to cooperate with the second limiting post h2 to achieve limiting, thereby ensuring the positioning accuracy between the upper base 231a and the lower base 231b and preventing misalignment between the two.

[0184] In some other embodiments, the first limiting post h1 and the second limiting post h2 may also be disposed on the lower base 231b, and the first limiting hole f1 and the second limiting hole f2 may be disposed on the upper base 231a. This application does not specifically limit this.

[0185] Please see Figure 17 , Figure 17 This is a perspective view of a rotating shaft mechanism 23 provided in some embodiments of this application. In this embodiment, a receiving groove c3 is provided on the rotating shaft base 231, the receiving groove c3 penetrating the front side of the rotating shaft base 231, and at least one of the fourth mating part 2322a, the first support part 2322e, and the second connecting part 2322d is accommodated within the receiving groove c3. Figure 17 In the illustrated embodiment, the fourth mating part 2322a, the first support part 2322e, and the second connecting part 2322d are all housed within the receiving groove c3. This structure is simple, and the rotating end 2322 has high structural strength, which can improve the connection strength between the first swing arm 232 and the rotating shaft base 231.

[0186] In another embodiment, please refer to Figure 18 , Figure 18 This is a perspective view of a rotating shaft mechanism 23 provided in some embodiments of this application. In this embodiment, the first support portion 2322e and the second connecting portion 2322d are housed within the receiving groove c3. This structure is simple and can also increase the structural strength of the rotating end 2322 and improve the connection strength between the first swing arm 232 and the rotating shaft base 231.

[0187] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0188] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rotating shaft mechanism, characterized in that, include: A rotating shaft base includes a fixing part and a first mating part, a second mating part, and a third mating part arranged sequentially along the extension direction of the rotating axis. The first mating part, the second mating part, and the third mating part are located on the same side of the fixing part. The front side of the first mating part is a first concave arc surface, the back side of the second mating part is a first convex arc surface, and the front side of the third mating part is a second concave arc surface; the first concave arc surface, the second concave arc surface, and the first convex arc surface are all circular arc surfaces, and the radius of the first concave arc surface and the radius of the second concave arc surface are both greater than the radius of the first convex arc surface. A first swing arm includes a rotating end and a swing arm body. The rotating end is disposed at one end of the swing arm body. When the first swing arm is in the extended position, the swing arm body and the fixed part are respectively located on opposite sides of the rotating end. The rotating end includes a fourth mating part, a fifth mating part, a sixth mating part, a second connecting part, and a first supporting part. The fourth mating part is located in front of the first mating part, the fifth mating part is located behind the second mating part, and the sixth mating part is located in front of the third mating part. The fourth, fifth, and sixth mating parts are respectively slidable along the first concave arc surface, the first convex arc surface, and the second concave arc surface, so that the first swing arm can rotate relative to the rotating shaft base around the rotating axis between the unfolded position and the folded position; the front side of the fifth mating part is a third concave arc surface, which is a circular arc surface, and the third concave arc surface is in contact with the first convex arc surface. The second connecting portion is disposed between the fourth mating portion and the fifth mating portion; The first support portion is disposed between the fourth mating portion and the second connecting portion, and the end of the first support portion away from the swing arm body is the first support end, and the back side of the first support end is provided with a first stop protrusion. The rotating shaft base also includes a second support portion, which is located on the back side of the first support portion and is disposed between the first mating portion and the third mating portion. The end of the second support portion away from the fixed portion is the second support end, and the front side of the second support end is provided with a second stop protrusion. When the first swing arm is in the folded position, the first stop protrusion is located on the side of the second stop protrusion facing the fixed part and contacts the second stop protrusion.

2. The rotating shaft mechanism according to claim 1, characterized in that, The back side of the fourth mating part is a second convex arc surface, and the second convex arc surface is in contact with the first concave arc surface. The back side of the sixth mating part is a third convex arc surface, which is in contact with the second concave arc surface. Both the second convex arc surface and the third convex arc surface are circular arc surfaces, and the radius of the second convex arc surface and the radius of the third convex arc surface are both greater than the radius of the third concave arc surface.

3. A rotating shaft mechanism, characterized in that, include: A rotating shaft base includes a fixing part and a first mating part, a second mating part, and a third mating part arranged sequentially along the extension direction of the rotating axis. The first mating part, the second mating part, and the third mating part are located on the same side of the fixing part. The front side of the first mating part is a first concave arc surface, the back side of the second mating part is a first convex arc surface, and the front side of the third mating part is a second concave arc surface. The first concave arc surface, the first convex arc surface, and the second concave arc surface form a virtual slide groove. The first convex arc surface forms the upper arc surface of the virtual slide groove, and the first concave arc surface and the second concave arc surface form the lower arc surface of the virtual slide groove. The center line of the first concave arc surface, the center line of the first convex arc surface, and the center line of the second concave arc surface are collinear with the axis of rotation; The first swing arm includes a rotating end and a swing arm body. The rotating end is disposed at one end of the swing arm body and is located in the virtual slide groove, and can slide relative to the rotating shaft base along the virtual slide groove. When the first swing arm is in the extended position, the swing arm body and the fixed part are respectively located on opposite sides of the rotating end. The rotating end includes a fourth mating part, a fifth mating part, a sixth mating part, a second connecting part, and a first supporting part. The fourth mating part is located in front of the first mating part, the fifth mating part is located behind the second mating part, and the sixth mating part is located in front of the third mating part. The fourth mating part, the fifth mating part, and the sixth mating part can slide along the first concave arc surface, the first convex arc surface, and the second concave arc surface, respectively, so that the first swing arm can rotate relative to the rotating shaft base around the rotating axis between the unfolded position and the folded position; The front side of the fifth mating part is a third concave arc surface, which is a circular arc surface, and the third concave arc surface is in contact with the first convex arc surface. The second connecting portion is disposed between the fourth mating portion and the fifth mating portion; The first support portion is disposed between the fourth mating portion and the second connecting portion, and the end of the first support portion away from the swing arm body is the first support end, and the back side of the first support end is provided with a first stop protrusion. The rotating shaft base also includes a second support portion, which is located on the back side of the first support portion and is disposed between the first mating portion and the third mating portion. The end of the second support portion away from the fixed portion is the second support end, and the front side of the second support end is provided with a second stop protrusion. When the first swing arm is in the folded position, the first stop protrusion is located on the side of the second stop protrusion facing the fixed part and contacts the second stop protrusion.

4. The rotating shaft mechanism according to claim 3, characterized in that, The back side of the fourth mating part is a second convex arc surface, and the second convex arc surface is in contact with the first concave arc surface. The back side of the sixth mating part is a third convex arc surface, which is in contact with the second concave arc surface.

5. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The radius of the first concave arc surface is equal to the radius of the second concave arc surface.

6. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The rotating shaft base also includes a first limiting part; At least a portion of the first limiting part is disposed on the front side of the fourth mating part; The back side of the first limiting part is a fourth convex arc surface, and the front side of the fourth mating part is a fourth concave arc surface; The center line of the fourth convex arc surface and the center line of the fourth concave arc surface are collinear with the axis of rotation, and the fourth convex arc surface and the fourth concave arc surface face each other.

7. The rotating shaft mechanism according to claim 6, characterized in that, The fourth convex arc surface and the fourth concave arc surface are spaced apart.

8. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The rotating shaft base also includes a second limiting part; At least a portion of the second limiting part is disposed on the back side of the fifth mating part; The front side of the second limiting part is a fifth concave arc surface, and the back side of the fifth mating part is a fifth convex arc surface; The center line of the fifth concave arc surface and the center line of the fifth convex arc surface are collinear with the axis of rotation, and the fifth concave arc surface and the fifth convex arc surface face each other.

9. The rotating shaft mechanism according to claim 8, characterized in that, The fifth concave arc surface and the fifth convex arc surface are spaced apart.

10. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The width of the swing arm body along the extension direction of the rotation axis is less than the distance between the first mating part and the third mating part along the extension direction of the rotation axis. The end of the first mating part that is away from the fixing part is the first end, and the end of the third mating part that is away from the fixing part is the second end; When the first swing arm is in the extended position, the main body of the swing arm is located between the first end and the second end.

11. The rotating shaft mechanism according to claim 10, characterized in that, The rotating shaft base is provided with at least one clearance hole, which penetrates the front side of the rotating shaft base; When the first swing arm is in the unfolded position, the ends of the fourth mating part that are away from the swing arm body, the ends of the fifth mating part that are away from the swing arm body, and the ends of the sixth mating part that are away from the swing arm body are accommodated in the at least one clearance hole.

12. The rotating shaft mechanism according to claim 11, characterized in that, The rotating shaft base further includes a first connecting part, which connects the second mating part and the fixing part; The end of the fifth mating part that is away from the main body of the swing arm is the third end, and the third end is provided with a clearance notch; When the first swing arm is in the extended position, the first connecting portion is accommodated within the clearance notch.

13. The rotating shaft mechanism according to claim 12, characterized in that, The inner wall surface of the clearance notch away from the third end is the first stop surface; When the first swing arm is in the extended position, the first stop surface contacts the back side of the first connecting part.

14. The rotating shaft mechanism according to claim 12 or 13, characterized in that, The at least one clearance hole includes a first clearance hole and a second clearance hole that are spaced apart; The arrangement direction of the first clearance hole and the second clearance hole is parallel to the extension direction of the rotating axis, and the first clearance hole and the second clearance hole are respectively located on opposite sides of the first connecting part; When the first swing arm is in the extended position, the end of the fourth mating part away from the swing arm body is accommodated in the first clearance hole, and the end of the sixth mating part away from the swing arm body is accommodated in the second clearance hole.

15. The rotating shaft mechanism according to claim 14, characterized in that, The width of the clearance notch along the extension direction of the rotation axis is smaller than the width of the fifth mating part along the extension direction of the rotation axis. The portion of the fifth mating part between the fourth mating part and the clearance gap is the first sub-part, and the portion of the fifth mating part between the sixth mating part and the clearance gap is the second sub-part; When the first swing arm is in the extended position, the end of the first sub-part that is away from the swing arm body is accommodated in the first clearance hole, and the end of the second sub-part that is away from the swing arm body is accommodated in the second clearance hole.

16. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The rotating shaft base is provided with a receiving groove, which extends through the front side of the rotating shaft base; At least one of the fourth mating part, the first support part, and the second connecting part is housed within the receiving groove.

17. The rotating shaft mechanism according to claim 1 or 3, characterized in that, The rotating shaft base includes an upper base and a lower base located on the back side of the upper base; the upper base and the lower base are fixedly connected. The second mating part constitutes part of the upper base, and the first mating part and the third mating part constitute part of the lower base.

18. An electronic device, characterized in that, include: First structural component; The rotating shaft mechanism according to any one of claims 1-17, wherein the first swing arm of the rotating shaft mechanism is connected to the first structural member in a transmission manner.

19. The electronic device according to claim 18, characterized in that, Also includes: The foldable screen includes a first display area and a second display area; The first structural member carries the first display area, the rotating shaft mechanism carries the second display area, and the second display area is located in front of the rotating shaft mechanism.

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