Rotating shaft mechanism and electronic equipment

Abstract

The invention provides a rotating shaft mechanism and electronic equipment, relates to the technical field of electronic products, and can ensure the structural strength of a connecting part of a swing arm and a rotating shaft base while meeting the requirement of thinning the thickness of a whole machine. The rotating shaft mechanism comprises a rotating shaft base and a first swing arm. The rotating shaft base comprises a first matching part, a second matching part and a third matching part which are sequentially arranged in the extending direction of the rotating shaft line. The front side face of the first matching part is a first concave arc face, the back side face of the second matching part is a first convex arc face, and the front side face of the third matching part is a second concave arc face. The first swing arm comprises a fourth matching part, a fifth matching part and a sixth matching part, the fourth matching part is located on the front side of the first matching part, the fifth matching part is located on the back side of the second matching part, and the sixth matching part is located on the front side of the third matching part. And the fourth matching part, the fifth matching part and the sixth matching part can slide along the first concave cambered surface, the first convex cambered surface and the second concave cambered surface respectively, so that the first swing arm rotates around the rotating axis relative to the rotating shaft base.

Description

Technical Field

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

[0002] A hinge mechanism is provided in electronic devices such as foldable screen mobile phones, laptop computers, watches, etc., and the hinge mechanism is used to achieve a rotatable connection between two adjacent parts.

[0003] In the hinge mechanism, the structural strength of the connection between the swing arm and the hinge base affects the structural strength of the whole device. As the electronic device becomes thinner, the design thickness of the hinge base gradually decreases, and the thickness of the slide groove in the hinge base for cooperating with the swing arm also decreases accordingly. The thickness of the sliding member on the swing arm for cooperating with the slide groove also becomes thinner and thinner, and the structural strength of the connection part becomes lower and lower, which is easy to break. Therefore, the electronic devices in the prior art usually cannot ensure the structural strength of the connection between the swing arm and the hinge base in the hinge mechanism while meeting the requirements of the thinness of the whole device. Summary of the invention

[0004] The present application provides a hinge mechanism and an electronic device, which can ensure the structural strength of the connection between the swing arm and the hinge base in the hinge mechanism while meeting the requirement of thinning the thickness of the entire device.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a rotating shaft mechanism is provided, which includes a rotating shaft base and a first swing arm.

[0007] The rotating shaft base includes a first matching portion, a second matching portion, and a third matching portion which are sequentially arranged along the extending direction of the rotating axis. The front side surface of the first matching portion is a first concave arc surface, the back side surface of the second matching portion is a first convex arc surface, and the front side surface of the third matching portion is a second concave arc surface. 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 colinear with the rotating axis.

[0008] The first swing arm includes a rotating end, which includes a fourth matching portion, a fifth matching portion and a sixth matching portion, wherein the fourth matching portion is located at the front side of the first matching portion, the fifth matching portion is located at the back side of the second matching portion, and the sixth matching portion is located at the front side of the third matching portion. The fourth matching portion, the fifth matching portion and the sixth matching portion 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 around the rotation axis relative to the rotation shaft base between the unfolded position and the folded position.

[0009] 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, the first concave arc surface and the second concave arc surface form the lower arc surface of the virtual slide groove, the rotating end is arranged in the virtual slide groove, and can slide along the virtual slide groove relative to the shaft base to realize rotation between the unfolded position and the folded position.

[0010] Based on this, the first concave arc surface, the first convex arc surface, and the second concave arc surface are also arranged in a staggered manner along the extension direction of the rotation axis. The fourth matching part is not limited by the upper arc surface, and the thickness can be made larger. The fifth matching part is not limited by the lower arc surface, and the thickness can be made larger. The sixth matching part is not limited by the upper arc surface, and the thickness can be made larger. In this way, the thickness of the rotating end can be increased, the structural strength of the rotating end can be improved, the connection strength between the rotating end and the rotating shaft base can be guaranteed, and fracture can be prevented.

[0011] At the same time, the radial distance between the first convex arc surface and the first concave arc surface, and the radial distance between the first convex arc surface and the second concave arc surface, can be designed to be smaller, which can reduce the height of the hinge base, thereby facilitating the thinning of the electronic device.

[0012] Moreover, the contact surface between the rotating end and the shaft base is staggered along the extension direction of the rotating axis. Under the premise that the size of the shaft base along the extension direction of the rotating axis is constant, the contact surface area between the rotating end and the shaft base is smaller and the friction force is smaller, which can avoid jamming and increase rotation flexibility.

[0013] The radius of the first concave arc surface and the radius of the second concave arc surface may be greater than the radius of the first convex arc surface, or may be smaller than the radius of the first convex arc surface, or may be equal to the radius of the first convex arc surface.

[0014] Optionally, the back side surface of the fourth matching portion is a second convex arc surface, and the second convex arc surface is in matching contact with the first concave arc surface. The front side surface of the fifth matching portion is a third concave arc surface, and the third concave arc surface is in matching contact with the first convex arc surface. The back side surface of the sixth matching portion is a third convex arc surface, and the third convex arc surface is in matching contact with the second concave arc surface. In this way, when the first swing arm rotates between the unfolded position and the folded position relative to the rotating shaft base, 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, thereby maintaining surface-to-surface contact during the sliding process, which can reduce stress concentration and avoid jamming during the sliding process.

[0015] Optionally, the radius of the first concave arc surface is equal to the radius of the second concave arc surface. In this way, the profile of the rotating shaft base is simple and convenient to process.

[0016] Optionally, the rotating shaft base also includes a first limiting portion. At least part of the first limiting portion is arranged on the front side of the fourth matching portion. The back side surface of the first limiting portion is a fourth convex arc surface, and the front side surface of the fourth matching portion 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 both collinear with the rotating axis, and the fourth convex arc surface faces the fourth concave arc surface. In this way, the first limiting portion separates the fourth matching portion from the folding screen, which can avoid friction, wear and noise caused by the contact movement of the fourth matching portion and the folding screen. At the same time, since the fourth convex arc surface of the first limiting portion faces the fourth concave arc surface of the fourth matching portion, and the center line of the fourth convex arc surface and the center line of the fourth concave arc surface are both collinear with the rotating axis, the first limiting portion can be prevented from interfering with the sliding of the fourth matching portion along the first concave arc surface, and the compactness of the structure can be improved.

[0017] Optionally, the fourth convex arc surface is spaced from the fourth concave arc surface. In this way, the fourth convex arc surface does not contact the fourth concave arc surface, which can reduce the contact area between the fourth matching part and the rotating shaft base, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve folding feel.

[0018] 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 matching portion. The front side surface of the second limiting portion is a fifth concave arc surface, and the back side surface of the fifth matching 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 colinear with the rotating axis, and the fifth concave arc surface faces the fifth convex arc surface.

[0019] The second limiting portion can shield and protect the fifth matching portion, preventing the fifth matching portion from being exposed on the back side of the rotating shaft base, thereby ensuring the aesthetics of the entire device, and no additional shaft cover is required on the back side of the rotating shaft base, thereby simplifying the complexity of the structure, reducing the thickness of the electronic device, and facilitating thinning. At the same time, the fifth convex arc surface of the fifth matching portion faces the fifth concave arc surface of the second limiting portion, and the center line of the fifth convex arc surface and the center line of the fifth concave arc surface are both colinear with the rotating axis, thereby preventing the second limiting portion from interfering with the sliding of the fifth matching portion along the first convex arc surface, and improving the compactness of the structure.

[0020] Optionally, the fifth concave arc surface is spaced from the fifth convex arc surface. In this way, the fifth convex arc surface does not contact the fifth concave arc surface, which can reduce the contact area between the fifth matching part and the rotating shaft base, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve folding feel.

[0021] Optionally, the shaft base further includes a fixing portion, and the first matching portion, the second matching portion, and the third matching portion are arranged on the same side of the fixing portion. The first swing arm further includes a swing arm body, and the rotating end is arranged at one end of the swing arm body. When the first swing arm is in the unfolded position, the swing arm body and the fixing portion are respectively located on opposite sides of the rotating end. This structure is simple and the layout is reasonable.

[0022] Optionally, the width of the swing arm body along the extension direction of the rotation axis is smaller than the distance between the first matching portion and the third matching portion along the extension direction of the rotation axis. The end of the first matching portion away from the fixed portion is the first end, and the end of the third matching portion away from the fixed portion is the second end. When the first swing arm is in the deployed position, the swing arm body is located between the first end and the second end.

[0023] In this way, on the one hand, when the first swing arm is in the deployed position, the thickness overlap between the swing arm body and the first matching part and the third matching part can be avoided, which is beneficial to reducing the thickness of the shaft base. On the other hand, the height of the first end and the second end can be increased, and the overlap width between the fourth matching part and the first concave arc surface, and between the sixth matching part and the second concave arc surface can be increased to prevent jamming. On the other hand, the swing arm body is located between the first end and the second end, that is, the first end and the second end are respectively located on the opposite sides of the swing arm body, so that the first end and the second end can be connected with other parts of the shaft base to avoid local protrusion, so that when the first swing arm is in the deployed position, the flatness of the front side of the shaft mechanism can be improved, and the reliability of the shaft mechanism during falling balls and pointed head impacts can be improved.

[0024] Optionally, the rotating shaft base is provided with at least one avoidance hole, and the at least one avoidance hole passes through the front side of the rotating shaft base. When the first swing arm is in the unfolded position, the end of the fourth matching part away from the swing arm body, the end of the fifth matching part away from the swing arm body, and the end of the sixth matching part away from the swing arm body are accommodated in the at least one avoidance hole. By using the at least one avoidance hole to avoid the end of the fourth matching part away from the swing arm body, the end of the fifth matching part away from the swing arm body, and the end of the sixth matching part away from the swing arm body, it is possible to avoid thickness superposition, reduce the thickness of the rotating shaft base, and facilitate the thinning of the electronic device.

[0025] Optionally, the shaft base further includes a first connection portion, and the first connection portion is connected between the second matching portion and the fixed portion. The end of the fifth matching portion away from the swing arm body is the third end portion, and the third end portion is provided with an escape notch. When the first swing arm is in the unfolded position, the first connection portion is accommodated in the escape notch. In this way, by means of the first connection portion, the second matching portion is fixed to the fixed portion, so that the second matching portion can be avoided from being suspended, and the structural strength can be improved.

[0026] Optionally, the inner wall surface of the avoidance notch away from the third end is a first stop surface. When the first swing arm is in the deployed position, the first stop surface contacts the back side surface of the first connecting portion. In this way, the first stop surface cooperates with the back side surface of the first connecting portion to stop the first swing arm in the deployed position.

[0027] Optionally, the end surface of the second limiting portion away from the fixing portion is a second stop surface. When the first swing arm is in the extended position, the second stop surface contacts the back side surface of the swing arm body. In this way, by means of the cooperation between the second stop surface and the back side surface of the swing arm body, the first swing arm can be further stopped in the extended position.

[0028] Optionally, at least one avoidance hole includes a first avoidance hole and a second avoidance hole that are spaced apart. The arrangement direction of the first avoidance hole and the second avoidance hole is parallel to the extension direction of the rotation axis, and the first avoidance hole and the second avoidance hole are respectively located on opposite sides of the first connecting portion. When the first swing arm is in the deployed position, the end of the fourth matching portion away from the swing arm body is accommodated in the first avoidance hole, and the end of the sixth matching portion away from the swing arm body is accommodated in the second avoidance hole. This layout is reasonable and the structure is simple.

[0029] Optionally, the width of the avoidance notch along the extension direction of the rotation axis is smaller than the width of the fifth matching portion along the extension direction of the rotation axis. The portion of the fifth matching portion between the fourth matching portion and the avoidance notch is the first sub-portion, and the portion of the fifth matching portion between the sixth matching portion and the avoidance notch is the second sub-portion. When the first swing arm is in the deployed position, the end of the first sub-portion away from the swing arm body is accommodated in the first avoidance hole, and the end of the second sub-portion away from the swing arm body is accommodated in the second avoidance hole. In this way, on the one hand, the contact area between the fifth matching portion and the first convex arc surface can be increased with the help of the first sub-portion and the second sub-portion to avoid stress concentration. On the other hand, with the help of the first avoidance hole and the second avoidance hole, the thickness overlap between the first sub-portion, the second sub-portion and the base can be avoided, the thickness of the base can be reduced, and it is conducive to the thinning of the whole machine.

[0030] Optionally, the rotating end further includes a second connecting portion, which is disposed between the fourth matching portion and the fifth matching portion. In this way, the second connecting portion can be used to increase the distance between the fourth matching portion and the fifth matching portion in the extension direction of the rotation axis, thereby improving the structural strength of the rotating end.

[0031] Optionally, the rotating end also includes a first support portion, the first support portion is arranged between the fourth matching 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 shaft base also includes a second support portion, the second support portion is located on the back side of the first support portion, and the second support portion is arranged between the first matching portion and the third matching 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 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 the first swing arm from detaching from the shaft base, thereby ensuring the stability of the connection.

[0032] Optionally, the shaft base is provided with a receiving groove, which passes through the front side of the shaft base. At least one of the fourth matching portion, the first supporting portion and the second connecting portion is accommodated in the receiving groove. This structure is simple, and the structural strength of the rotating end is relatively large, which can improve the connection strength between the first swing arm and the shaft base.

[0033] Optionally, the rotating shaft base includes an upper base and a lower base located on the back side of the upper base. The upper base is fixedly connected to the lower base. The second matching portion constitutes a part of the upper base, and the first matching portion and the third matching portion constitute a part of the lower base. In this way, the lower base and the upper base can clamp the rotating end by the front side and the back side respectively, which can reduce the difficulty of assembling the rotating shaft base and the rotating end and improve the assembly efficiency.

[0034] In a second aspect, an electronic device is provided. The electronic device includes 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 transmission-connected to the first structural member.

[0035] Since the electronic device provided in the present application includes the rotating shaft base as described in any of the above technical solutions, the two can solve the same technical problems and achieve the same effects.

[0036] Optionally, the electronic device further comprises a folding screen, the folding screen comprising a first display area and a second display area. The first structural member carries the first display area, the hinge mechanism carries the second display area, and the second display area is located in front of the hinge mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A three-dimensional diagram of an electronic device in an unfolded state provided by some embodiments of the present application;

[0038] Figure 2 for Figure 1 A schematic diagram of a partial exploded structure of the electronic device shown;

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the electronic device shown in the folded state;

[0040] Figure 4 An assembly diagram of the main middle frame, the sub-middle frame, the hinge mechanism and the folding screen of the electronic device provided in some embodiments of the present application in the unfolded state;

[0041] Figure 5 for Figure 4 A partial enlarged view of area I in the electronic device shown;

[0042] Figure 6 for Figure 5 A schematic diagram of the structure of the electronic device shown when the first swing arm is in a folded position;

[0043] Figure 7 A three-dimensional diagram of a rotating shaft mechanism provided in some embodiments of the present application;

[0044] Figure 8 for Figure 7 Schematic diagram of the exploded structure of the rotating shaft mechanism shown;

[0045] Fig. 9 for Figure 7 The illustrated rotating shaft mechanism is a three-dimensional cross-sectional view along line AA when the first swing arm is in a folded position;

[0046] Fig.10 for Figure 7 The illustrated rotating shaft mechanism is a three-dimensional cross-sectional view along line BB when the first swing arm is in a folded position;

[0047] Fig.11 for Figure 8 A three-dimensional view of the first swing arm in the rotating shaft mechanism shown in one viewing angle;

[0048] Fig.12 for Fig.11 A three-dimensional view of the first swing arm shown in another viewing angle;

[0049] Fig.13 for Figure 8 A bottom view of the upper base in the rotating shaft mechanism shown;

[0050] Fig.14 for Figure 8 A three-dimensional view of the lower base in the rotating shaft mechanism shown;

[0051] Fig.15 for Figure 7 A three-dimensional cross-sectional view of the rotating shaft mechanism along line CC;

[0052] Fig.16 for Figure 7The illustrated rotating shaft mechanism is a three-dimensional cross-sectional view along line DD when the first swing arm is in a folded position;

[0053] Fig.17 A three-dimensional diagram of a rotating shaft mechanism provided in some other embodiments of the present application;

[0054] Fig.18 A three-dimensional diagram of a rotating shaft mechanism provided in some other embodiments of the present application. DETAILED DESCRIPTION

[0055] In the embodiments of the present application, the terms "first", "second", "third", "fourth", "fifth", and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", and "sixth" may explicitly or implicitly include one or more of the features.

[0056] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0057] In the embodiments of the present application, unless otherwise specified, the description of "collinearity" means approximate collinearity within a certain error range, and the error range can be less than 2 mm relative to the absolute collinearity deviation distance.

[0058] The present application provides an electronic device, which may be a user equipment (UE) or a terminal, for example, the electronic device may be a tablet computer (portable android device, PAD), a laptop computer, a watch, a personal digital assistant (PDA), a handheld device with a wireless communication function, a computing device, a vehicle-mounted device, a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and other mobile terminals or fixed terminals.

[0059] The electronic device includes a first structure, a second structure and a rotating shaft mechanism. It should be noted that the electronic device may include other structures in addition to the first structure, the second structure and the rotating shaft mechanism, which are not specifically limited here.

[0060] The rotating shaft mechanism is connected between the first structural member and the second structural member, and is used to enable the first structural member to rotate relative to the second structural member, so that the electronic device can be switched between an unfolded state and a folded state.

[0061] The unfolded state refers to the state of the electronic device when the angle between the first structural member and the second structural member is at the maximum angle, and correspondingly, the folded state refers to the state of the electronic device when the angle between the first structural member and the second structural member is at the minimum angle.

[0062] The following embodiments are exemplified by taking the electronic device as a folding screen device. Specifically, the folding screen device can be exemplified by a handheld device with a wireless communication function. The handheld device with a wireless communication function can be, for example, a mobile phone.

[0063] See also Figure 1 and Figure 2 , Figure 1 A three-dimensional diagram of an electronic device 100 in an unfolded state provided in some embodiments of the present application, Figure 2 for Figure 1A schematic diagram of a partial exploded structure of the electronic device 100 shown. The electronic device 100 is approximately in the shape of a rectangular flat plate in the unfolded state. In order to facilitate the description of the embodiments below, an XYZ coordinate system is established for the electronic device 100 in the unfolded state, and the length direction of the electronic device 100 is defined as the X-axis direction, the width direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It can be understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the electronic device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0064] The electronic device 100 includes a folding screen 10 and a supporting device 20 .

[0065] The foldable screen 10 is used to display information such as images and videos. The foldable screen 10 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (micro organic light-emitting diode) screen, a quantum dot light-emitting diode (QLED) screen, a liquid crystal display (LCD), and the like.

[0066] The folding screen 10 has a display area for displaying image information. The display area of ​​the folding screen 10 is exposed to present images, videos and other information to the user. The folding screen 10 includes a first display area 11, a second display area 12 and a third display area 13. The second display area 12 is connected between the first display area 11 and the third display area 13. Figure 1 In the electronic device 100 shown, the folding screen 10 is in the unfolded state, and the first display area 11, the second display area 12, and the third display area 13 are arranged in sequence along the X-axis direction, so that the electronic device 100 is folded in the horizontal direction. In some other embodiments, when the folding screen 10 is in the unfolded state, the first display area 11, the second display area 12, and the third display area 13 can also be arranged in sequence along the Y-axis direction. In this way, the electronic device 100 is folded in the longitudinal direction. When the folding screen 10 is in the unfolded state, a large-screen display can be achieved to provide users with richer information and bring users a better user experience.

[0067] At least the second display area 12 of the folding screen 10 is a flexible screen structure. In this way, the second display area 12 can be bent and deformed after being subjected to external force, so that the folding screen 10 is Figure 1The first display area 11 and the third display area 13 of the folding screen 10 can be a flexible screen structure, a hard screen structure, or a partially flexible screen structure and a partially hard screen structure, which is not specifically limited here.

[0068] See also Figure 3 , Figure 3 for Figure 1 The schematic diagram of the structure of the electronic device 100 shown is in a folded state, and the folding screen 10 in the electronic device 100 is also in a folded state. Specifically, when the folding screen 10 is in the folded state, the first display area 11 and the third display area 13 of the folding screen 10 are approximately parallel and opposite. It should be noted that the angle between the first display area 11 and the third display area 13 is within 30°, and the first display area 11 and the third display area 13 can be considered to be approximately parallel. The first display area 11 and the third display area 13 are opposite to each other means that the display surface of the first display area 11 and the display surface of the third display area 13 face each other.

[0069] When the foldable screen 10 is in the folded state, please continue to refer to Figure 3 , the second display area 12 is folded into a water drop shape, in which 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 is connected between the arc segment 123 and the first display area 11. The second transition segment 122 is connected between the arc segment 123 and the third display area 13. The distance between one end of the first transition segment 121 connected to the first display area 11 and one end of the second transition segment 122 connected to the third display area 13 is the third distance, and the distance between one end of the first transition segment 121 connected to the arc segment 123 and one end of the second transition segment 122 connected to the arc segment 123 is the fourth distance, and the fourth distance is greater than the third distance. It can be understood that when the electronic device is in a folded state, the second display area 12 of the folding screen 10 can also be folded into other shapes according to actual needs, and the present application does not limit this.

[0070] When the electronic device 100 is in the folded state, please continue to refer to Figure 3 The supporting device 20 is protected outside the folding screen 10, and the folding screen 10 is invisible to the user, which can prevent the folding screen 10 from being scratched by hard objects. The electronic device is an inward-folding electronic device, and the size of the electronic device 100 is reduced, which is convenient to carry.

[0071] The support device 20 is used to carry the folding screen 10. The support device 20 includes a first shell (also known as a first structural member) 21, a second shell (also known as a second structural member) 22, and a hinge mechanism 23. The first shell 21 carries the first display area 11, and the second shell 22 carries the third display area 13. The hinge mechanism 23 is connected between the first shell 21 and the second shell 22, and carries the second display area 12. The hinge mechanism 23 is used to realize the rotation between the second shell 22 and the first shell 21, so as to support the folding screen 10 to fold between the unfolded state and the folded state, and enable the electronic device 100 to switch between the unfolded state and the folded state.

[0072] When the electronic device is a folding screen device, the unfolded state may be the state of the electronic device 100 when the angle between the first housing 21 and the second housing 22 is approximately 180°; the folded state may be the state of the electronic device 100 when the angle between the first housing 21 and the second housing 22 is approximately 0°. When the electronic device is other devices, the angle between the first structural member and the second structural member may also be other angles in the unfolded state and the folded state, and this application does not specifically limit this.

[0073] In the above embodiment, optionally, the first shell 21 may include a middle frame and a back cover connected together, the first display area 11 of the folding screen 10 is carried on the middle frame of the first shell 21, and the back cover is located on the side of the middle frame away from the first display area 11, and the back cover can be replaced with a display screen (such as an LCD display screen). A accommodating cavity is formed between the middle frame and the back cover, which is used to accommodate electronic components such as a motherboard, a camera module, and a battery. On this basis, the first shell 21 can be connected to the hinge mechanism 23 with the help of the middle frame, and can also be connected to the hinge mechanism 23 with the help of the back cover. The following embodiments are described as an example of the first shell 21 being connected to the hinge mechanism 23 with the help of the middle frame.

[0074] Similarly, the second shell 22 may also include a middle frame and a back cover connected together. The third display area 13 of the folding screen 10 is carried on the middle frame of the second shell 22. The back cover is located on the side of the middle frame away from the third display area 13, and the back cover may also be replaced with a display screen (such as an LCD display screen). A accommodating cavity is formed between the middle frame and the back cover, which is used to accommodate electronic components such as sub-boards, speaker modules, arrays, batteries, etc. On this basis, the second shell 22 can be connected to the hinge mechanism 23 with the help of the middle frame, and can also be connected to the hinge mechanism 23 with the help of the back cover. The following embodiments are described by taking the second shell 22 connected to the hinge mechanism 23 with the help of the middle frame as an example.

[0075] It should be noted that in order to distinguish the middle frame of the first shell 21 from the middle frame of the second shell 22, in the description of the following embodiments, the middle frame of the first shell 21 is called the main middle frame, labeled A in the accompanying drawings, and the middle frame of the second shell 22 is called the sub-middle frame, labeled B in the accompanying drawings.

[0076] See also Figure 4 , Figure 4 The electronic device 100 provided in some embodiments of the present application has an assembly diagram of the internal main middle frame A, the sub-middle frame B, the hinge mechanism 23 and the folding screen 10 in the 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 rotating shaft mechanism 23 is cut along the XZ plane at the first swing arm 232 and the second swing arm 233 .

[0077] The rotating shaft base 231 provides a position reference in the rotating shaft mechanism 23. The main middle frame A is rotatably connected to the rotating shaft base 231 by means of the first swing arm 232. Specifically, the main middle frame A can be transmission-connected to the first swing arm 232, and the first swing arm 232 is rotatably connected to the rotating shaft base 231.

[0078] Among them, the "transmission connection" described in this embodiment and the following embodiments means that among the two connected components, the movement of one component can be transmitted to the other component, and the connection method between the two components can be a fixed connection, or it can include but is not limited to at least one of the connection methods such as rotating connection, sliding connection, gear meshing transmission connection, sprocket transmission connection, and cam mechanism transmission connection.

[0079] Similarly, the sub-middle frame B is rotatably connected to the shaft base 231 by means of the second swing arm 233 . Specifically, the sub-middle frame B is transmission-connected to the second swing arm 233 , and the second swing arm 233 is rotatably connected to the shaft base 231 .

[0080] The main middle frame A and the sub-middle frame B can be rotated relative to the rotating shaft base 231 by means of the first swing arm 232 and the second swing arm 233, respectively, so that the electronic device 100 moves between the unfolded state and the folded state. When the electronic device 100 is in the unfolded state, the first swing arm 232, the main middle frame A, the second swing arm 233 and the sub-middle 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 middle frame A, the second swing arm 233 and the sub-middle frame B are all in the folded position.

[0081] In some embodiments, the connection method of the main middle frame A, the first swing arm 232, and the hinge base 231 can be the same as the connection method of the sub-middle frame B, the second swing arm 233, and the hinge base 231, which can reduce the structural complexity and assembly difficulty.

[0082] Of course, in other embodiments, the connection method of the main middle frame A, the first swing arm 232, and the rotating shaft base 231 may be different from the connection method of the sub-middle frame B, the second swing arm 233, and the rotating shaft base 231. The following embodiments are exemplified by the connection method of the main middle frame A, the first swing arm 232, and the rotating shaft base 231 being the same as the connection method of the sub-middle frame B, the second swing arm 233, and the rotating shaft base 231.

[0083] Based on this, the following mainly introduces the connection method of the main middle frame A, the first swing arm 232, and the hinge base 231. The connection method of the sub-middle frame B, the second swing arm 233, and the hinge base 231 can be implemented with reference to the connection method of the main middle frame A, the first swing arm 232, and the hinge base 231, and this application will not go into details.

[0084] See also Figure 5 , Figure 5 for Figure 4 A partial enlarged view of area I in the electronic device 100 is shown. A circular arc groove C is provided on the rotating shaft base 231. 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 circular arc groove C and can slide along the circular arc groove C, so that the first swing arm 232 can rotate between the unfolded position and the folded position relative to the rotating shaft base 231. Figure 5 In the embodiment, the first swing arm 232 is in the extended position, see Figure 6 , Figure 6 for Figure 5 The structure diagram of the electronic device 100 is shown when the first swing arm 232 is in the folded position.

[0085] In the above-mentioned rotating shaft mechanism 23, the structural strength of the connection part between the first swing arm 232 and the rotating shaft base 231 affects the structural strength of the whole machine. However, as the whole machine becomes thinner, the thickness H of the rotating shaft base 231 gradually decreases, and the thickness d1 of the arc-shaped slide groove C in the rotating shaft base 231 for cooperating with the first swing arm 232 also decreases accordingly, and the thickness d2 of the rotating end 2322 of the first swing arm 232 also becomes thinner and thinner, which makes the structural strength of the connection part lower and easier to break. Therefore, the electronic device 100 cannot ensure the structural strength of the connection part between the first swing arm 232 and the rotating shaft base 231 in the rotating shaft mechanism 23 while meeting the requirements of the thinning of the whole machine.

[0086] To solve the above problems, see Figure 7 and Figure 8 , Figure 7 A three-dimensional diagram of a rotating shaft mechanism 23 provided in some embodiments of the present application, Figure 8 for Figure 7The exploded structural diagram of the rotating shaft mechanism 23 is shown. The rotating shaft mechanism 23 includes a rotating shaft base 231, a first swing arm 232 and a second swing arm 233.

[0087] It should be noted that, in the embodiments below, the “front side” used to describe the hinge mechanism 23 and the various parts within the hinge mechanism 23 refers to the side of the object being described facing the folding screen 10, the “front side” refers to the surface of the object being described facing the folding screen 10, the “back side” refers to the side of the object being described facing away from the folding screen 10, and the “back side” refers to the surface of the object being described facing away from the folding screen 10, which will not be elaborated one by one in the following text.

[0088] In addition, it should be noted that Figure 7-Figure 8 The shaft mechanism 23 includes some components, and the actual shape, size, position and configuration of these components are not limited to Figure 7-Figure 8 The shaft mechanism 23 includes Figure 7-Figure 8 In addition to the components shown in , other components may also be included, such as an axle cover, a secondary swing arm, a synchronization mechanism, a damping mechanism, etc., which is not specifically limited in this application.

[0089] On the basis of the above, please refer to Figure 8 The rotating shaft base 231 provides a position reference in the rotating shaft mechanism 23. The rotating shaft base 231 can be made of metal materials such as stainless steel, aluminum alloy, magnesium aluminum alloy, or non-metal materials such as polycarbonate (PC), PC+glass fiber, ABS plastic (acrylonitrile butadiene styrene plastic). The rotating shaft base 231 includes a first matching portion 2311, a second matching portion 2312, and a third matching portion 2313 which are sequentially arranged along the extension direction of the rotating axis.

[0090] The front side of the first matching portion 2311 is a first concave arc surface m1, which is concave toward the back side. The back side of the second matching portion 2312 is a first convex arc surface n1, which is convex toward the back side. The front side of the third matching portion 2313 is a second concave arc surface m2, which is concave toward the back side.

[0091] The center line of the first concave arc surface m1, the center line of the first convex arc surface n1, and the center line of the second concave arc surface m2 are all colinear with the rotation axis. The radius of the first concave arc surface m1 and the radius of the second concave arc surface m2 can be greater than the radius of the first convex arc surface n1, or less than the radius of the first convex arc surface n1, or equal to the radius of the first convex arc surface n1. This application is exemplified by the fact that the radius of the first concave arc surface m1 and the radius of the second concave arc surface m2 are greater than the radius of the first convex arc surface n1, which cannot be regarded as a special limitation on this application.

[0092] On the basis of the above, please continue to refer to Figure 8 The first swing arm 232 includes a rotating end 2322, and the rotating end 2322 includes a fourth matching portion 2322a, a fifth matching portion 2322b and a sixth matching portion 2322c.

[0093] See also Fig. 9 , Fig. 9 for Figure 7 The illustrated three-dimensional cross-sectional view of the rotating shaft mechanism 23 along line AA when the first swing arm 232 is in the folded position, the fourth matching portion 2322a is located in front of the first matching portion 2311. Fig.10 , Fig.10 for Figure 7 The three-dimensional cross-sectional view of the rotating shaft mechanism 23 along the BB line when the first swing arm 232 is in the folded position shows that the fifth matching portion 2322 b is located at the back side of the second matching portion 2312 and the sixth matching portion 2322 c is located at the front side of the third matching portion 2313 .

[0094] Based on this, the fourth matching part 2322a, the fifth matching part 2322b and the sixth matching 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 around the rotation axis relative to the rotation shaft base 231 between the unfolded position and the folded position.

[0095] 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, 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 arranged in the virtual slide groove, and can slide along the virtual slide groove relative to the shaft base 231 to realize rotation between the unfolded position and the folded position.

[0096] Based on this, the first matching part 2311, the second matching part 2312, and the third matching part 2313 are sequentially arranged along the extension direction of the rotation axis, and 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 matching part 2322a is not restricted by the upper arc surface, and the thickness can be made larger, the fifth matching part 2322b is not restricted by the lower arc surface, and the thickness can be made larger, and the sixth matching part 2322c is not restricted by the upper arc surface, and the thickness can be made larger. In this way, 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 ensured, and fracture can be prevented.

[0097] At the same time, the distance between the first convex arc surface n1 and the first concave arc surface m1 in the radial direction of the first concave arc surface m1, and the distance between the first convex arc surface n1 and the second concave arc surface m2 in the radial direction of the second concave arc surface m2 can be designed to be smaller, which can reduce the height of the hinge base 231, thereby facilitating the thinning of the electronic device 100.

[0098] Moreover, the contact surface between the rotating end 2322 and the rotating shaft base 231 is staggered along the extension direction of the rotating axis. Under the premise that the size of the rotating shaft base 231 along the extension direction of the rotating axis is constant, the contact surface area between the rotating end 2322 and the rotating shaft base 231 is smaller, the friction force is smaller, and jamming can be avoided, thereby increasing rotation flexibility.

[0099] In the above embodiments, the fourth matching portion 2322a, the fifth matching portion 2322b and the sixth matching portion 2322c may be in the shape of a slider, a convex ball, a cylinder, a drum, a roller, etc., and the present application does not make any specific limitation on this.

[0100] In some embodiments, see Fig.11 and Fig.12 , Fig.11 for Figure 8 The three-dimensional diagram of the first swing arm 232 in the rotating shaft mechanism 23 shown in FIG. 2 is a perspective diagram of the first swing arm 232 in the rotating shaft mechanism 23. Fig.12 for Fig.11 The first swing arm 232 is shown in a three-dimensional view from another perspective.

[0101] The back side surface of the fourth matching portion 2322a is a second convex arc surface n2, which protrudes toward the back side and is in matching contact with the first concave arc surface m1.

[0102] Similarly, the front side surface of the fifth matching portion 2322b is a third concave arc surface m3, the third concave arc surface m3 is recessed toward the back side, and the third concave arc surface m3 is in matching contact with the first convex arc surface n1.

[0103] The back side surface of the sixth matching portion 2322c is a third convex arc surface n3, which protrudes toward the back side and is in matching contact with the second concave arc surface m2.

[0104] In this way, when the first swing arm 232 rotates between the unfolded position and the folded position relative to the shaft 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. Therefore, during the sliding process, the surface contact is maintained, which can reduce stress concentration and avoid jamming during the sliding process.

[0105] In some embodiments, please refer to Figure 8 , Fig.10 and Fig.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. In this way, the profile of the rotating shaft base 231 is simple and easy to process.

[0106] Of course, in some other embodiments, the radius of the first concave arc surface m1 and the radius of the second concave arc surface m2 may also be different, and correspondingly, the radius of the second convex arc surface n2 and the radius of the third convex arc surface n3 may also be different, and this application does not make specific limitations on this.

[0107] In the above embodiment, the rotating shaft base 231 can be an integral structural member, or can be formed by assembling a plurality of components.

[0108] In some embodiments, please refer to 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 the lower base 231b is fixedly connected to the upper base 231a. Specifically, the lower base 231b may be fixedly connected to the upper base 231a by welding, bonding or other non-detachable connection methods, or by threaded connection, clamping or other detachable connection methods. This application is an exemplary description of the lower base 231b being fixedly connected to the upper base 231a by a detachable connection method. For details, please refer to Figure 8 The lower base 231b can be connected to the upper base 231a by screws. In this way, it is convenient to disassemble, repair, replace or clean up dust.

[0109] On the basis of the above, please continue to refer to Figure 8 , the first matching portion 2311 and the third matching portion 2313 can constitute a part of the lower base 231b, and the second matching portion 2312 can constitute a part of the upper base 231a. In this way, the lower base 231b and the upper base 231a can clamp the rotating end 2322 by the front side and the back side respectively, so that the fourth matching portion 2322a is located at the front side of the first matching portion 2311, the fifth matching portion 2322b is located at the back side of the second matching portion 2312, and the sixth matching portion 2322c is located at the front side of the third matching portion 2313. In this way, the assembly difficulty of the rotating shaft base 231 and the rotating end 2322 can be reduced, and the assembly efficiency can be improved.

[0110] It should be noted that, in addition to being composed of an upper base 231a and a lower base 231b, the shaft base 231 may also have other assembly methods, which is not specifically limited in the present application.

[0111] In some embodiments, see Figure 8The shaft base 231 may further include a first limiting portion 2314 , a second limiting portion 2315 and a third limiting portion 2316 .

[0112] At least a portion of the first position limiting portion 2314 is disposed on the front side of the fourth matching portion 2322a. Specifically, the first position limiting portion 2314 may be disposed entirely on the front side of the fourth matching portion 2322a, or a portion of the first position limiting portion 2314 may be disposed on the front side of the fourth matching portion 2322a. This embodiment is described by exemplifying that a portion of the first position limiting portion 2314 is disposed on the front side of the fourth matching portion 2322a, which cannot be considered as a special limitation to the present application.

[0113] See also Fig.13 , Fig.13 for Figure 8 The bottom view of the upper base 231a in the rotating shaft mechanism shown in the figure shows that the back side surface of the first limiting portion 2314 is the fourth convex arc surface n4. Fig.11 The front side surface of the fourth matching portion 2322a is a fourth concave arc surface m4.

[0114] Please return to Fig. 9 The center line of the fourth convex arc surface n4 and the center line of the fourth concave arc surface m4 are both colinear with the rotation axis, and the fourth convex arc surface n4 faces the fourth concave arc surface m4.

[0115] In this way, the fourth matching portion 2322a can be separated from the folding screen 10 by means of the first limiting portion 2314, so as to avoid friction, wear and noise caused by relative movement between the fourth matching portion 2322a and the folding screen 10 when sliding along the first concave arc surface m1.

[0116] At the same time, because the back side surface of the first limiting portion 2314 is the fourth convex arc surface n4, and the front side surface of the fourth matching portion 2322a is the fourth concave arc surface m4, the center line of the fourth convex arc surface n4 and the center line of the fourth concave arc surface m4 are both colinear with the rotation axis, so the first limiting portion 2314 can be avoided from interfering with the sliding of the fourth matching portion 2322a along the first concave arc surface m1, and the compactness of the structure can be improved.

[0117] Moreover, the first limiting portion 2314 can limit the fourth matching portion 2322a to prevent one end of the fourth matching portion 2322a along the extension direction of the rotation axis from tilting relative to the other end during the sliding process of the fourth matching portion 2322a along the first concave arc surface m1. In addition, the first limiting portion 2314 can improve the structural strength of the rotation shaft base 231.

[0118] In the above embodiment, the fourth convex arc surface n4 and the fourth concave arc surface m4 can be spaced apart or in direct contact. This application is exemplified by the spaced apart arrangement between the fourth convex arc surface n4 and the fourth concave arc surface m4. The width of the gap between the fourth convex arc surface n4 and the fourth concave arc surface m4 can be less than or equal to 2 mm. Specifically, the width of the gap can be 0.1 mm, 0.5 mm, 1 mm, 1.5 mm or 2 mm. In this way, the fourth convex arc surface n4 does not contact the fourth concave arc surface m4, which can reduce the contact area between the fourth matching portion 2322a and the rotating shaft base 231, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve the folding feel.

[0119] Also, see Fig.13 The first limiting portion 2314 can be disposed on the upper base 231a. This structure is simple and easy to assemble.

[0120] Please return to Figure 8 , at least a portion of the second position limiting portion 2315 is disposed on the back side of the fifth matching portion 2322b. Specifically, the second position limiting portion 2315 can be disposed entirely on the back side of the fifth matching portion 2322b, or a portion of the second position limiting portion 2315 can be disposed on the back side of the fifth matching portion 2322b. This embodiment is exemplified by a portion of the second position limiting portion 2315 being disposed on the back side of the fifth matching portion 2322b, which cannot be considered as a special limitation to the present application.

[0121] See also Fig.12 The back side surface of the fifth matching portion 2322b is substantially a fifth convex arc surface n5. Fig.14 , Fig.14 for Figure 8 In the three-dimensional view of the lower base 231b of the rotating shaft mechanism 23, the front side surface of the second limiting portion 2315 is a fifth concave arc surface m5.

[0122] See also Fig.10 The center line of the fifth convex arc surface n5 and the center line of the fifth concave arc surface m5 are both colinear with the rotation axis, and the fifth convex arc surface n5 faces the fifth concave arc surface m5.

[0123] In this way, the fifth matching portion 2322b can be shielded and protected by the second limiting portion 2315 to prevent the fifth matching portion 2322b from being exposed on the back side of the hinge base 231, thereby ensuring the aesthetics of the entire machine. No shaft cover is required on the back side of the hinge base 231, thereby simplifying the structural complexity, reducing the thickness of the electronic device 100, and facilitating thinning.

[0124] At the same time, because the back side surface of the fifth matching portion 2322b is roughly the fifth convex arc surface n5, and the front side surface of the second limiting portion 2315 is the fifth concave arc surface m5, the center line of the fifth convex arc surface n5 and the center line of the fifth concave arc surface m5 are both colinear with the rotation axis, so the second limiting portion 2315 can be avoided from interfering with the sliding of the fifth matching portion 2322b along the first convex arc surface n1, and the compactness of the structure can be improved.

[0125] Moreover, the structural strength of the rotating shaft base 231 can be improved by means of the second limiting portion 2315 .

[0126] In the above embodiment, the fifth convex arc surface n5 and the fifth concave arc surface m5 can be spaced apart or in direct contact. The present application is exemplified by the spaced apart arrangement between the fifth convex arc surface n5 and the fifth concave arc surface m5. The width of the gap between the fifth convex arc surface n5 and the fifth concave arc surface m5 can be less than or equal to 2 mm. Specifically, the width of the gap can be 0.1 mm, 0.5 mm, 1 mm, 1.5 mm or 2 mm. In this way, the fifth convex arc surface n5 does not contact the fifth concave arc surface m5, which can reduce the contact area between the fifth matching portion 2322b and the rotating shaft base 231, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve the folding feel.

[0127] Also, see Fig.14 The second position limiting portion 2315 can be disposed on the lower base 231b. This structure is simple and easy to assemble.

[0128] Likewise, please refer back to Figure 8 , at least a portion of the third position limiting portion 2316 is disposed on the front side of the sixth matching portion 2322c. Specifically, the third position limiting portion 2316 may be disposed entirely on the front side of the sixth matching portion 2322c, or a portion of the third position limiting portion 2316 may be disposed on the front side of the sixth matching portion 2322c. This embodiment is exemplified by the fact that a portion of the third position limiting portion 2316 is disposed on the front side of the sixth matching portion 2322c, which cannot be considered as a special limitation to the present application.

[0129] See also Fig.13 The back side surface of the third limiting portion 2316 is a sixth convex arc surface n6. Fig.11 The front side surface of the sixth matching portion 2322c is a sixth concave arc surface m6.

[0130] In the Fig.13 The upper base 231a and Fig.11 The first swing arm 232 is applied to Figure 8 In the assembly structure shown, the center line of the sixth convex arc surface n6 and the center line of the sixth concave arc surface m6 are both colinear with the rotation axis, and the sixth convex arc surface n6 faces the sixth concave arc surface m6.

[0131] In this way, the sixth matching portion 2322c can be separated from the folding screen 10 by means of the third limiting portion 2316 to prevent the sixth matching portion 2322c from moving relative to the folding screen 10 and generating friction, wear and noise when sliding along the second concave arc surface m2.

[0132] At the same time, because the back side surface of the third limiting portion 2316 is the sixth convex arc surface n6, and the front side surface of the sixth matching portion 2322c is the sixth concave arc surface m6, the center line of the sixth convex arc surface n6 and the center line of the sixth concave arc surface m6 are both colinear with the rotation axis, so the third limiting portion 2316 can be avoided from interfering with the sliding of the sixth matching portion 2322c along the second concave arc surface m2, and the compactness of the structure can be improved.

[0133] Moreover, the third limiting portion 2316 can limit the sixth matching portion 2322c to prevent one end of the sixth matching portion 2322c from tilting relative to the other end along the extension direction of the rotation axis when the sixth matching portion 2322c slides along the second concave arc surface m2. In addition, the third limiting portion 2316 can improve the structural strength of the rotation shaft base 231.

[0134] In the above embodiment, the sixth convex arc surface n6 and the sixth concave arc surface m6 can be spaced apart or in direct contact. The present application is exemplified by the spacing between the sixth convex arc surface n6 and the sixth concave arc surface m6. The width of the gap between the sixth convex arc surface n6 and the sixth concave arc surface m6 can be less than or equal to 2mm. Specifically, the width of the gap can be 0.1mm, 0.5mm, 1mm, 1.5mm or 2mm. In this way, the sixth convex arc surface n6 does not contact the sixth concave arc surface m6, which can reduce the contact area between the sixth matching portion 2322c and the rotating shaft base 231, reduce sliding friction, reduce wear, extend service life, reduce the possibility of jamming, and improve the folding feel.

[0135] Also, see Fig.13 The third limiting portion 2316 can be disposed on the upper base 231a. This structure is simple and easy to assemble.

[0136] In some other embodiments, the shaft base 231 may form openings on the front side of the fourth limiting portion 2322a, on the back side of the fifth limiting portion 2322b, and on the front side of the sixth limiting portion 2322c, which is not specifically limited in the present application.

[0137] In some embodiments, please refer back to Figure 8The rotating shaft base 231 may further include a fixing portion 2317. Specifically, the fixing portion 2317 may include an upper fixing portion 2317a and a lower fixing portion 2317b. The upper fixing portion 2317a constitutes a part of the upper base 231a, and the lower fixing portion 2317b constitutes a part of the lower base 231b. The fixed connection structure between the upper base 231a and the lower base 231b is arranged between the upper fixing portion 2317a and the lower fixing portion 2317b.

[0138] On the basis of the above, the first matching portion 2311, the second matching portion 2312, the third matching portion 2313, the first limiting portion 2314, the second limiting portion 2315, and the third limiting portion 2316 are arranged on the same side of the fixing portion 2317. Moreover, the first limiting portion 2314, the second matching portion 2312, and the third limiting portion 2316 are connected to the upper fixing portion 2317a and are located on the same side of the upper fixing portion 2317a, and the first matching portion 2311, the second limiting portion 2315, and the third matching portion 2313 are connected to the lower fixing portion 2317b and are located on the same side of the lower fixing portion 2317b.

[0139] Based on this, please continue to refer to Figure 8 The first swing arm 232 further includes a swing arm body 2321, and the rotating end 2322 is disposed at one end of the swing arm body 2321. When the first swing arm 232 is in the unfolded position, please refer to Figure 7 The swing arm body 2321 and the fixing portion 2317 are respectively located on opposite sides of the rotating end 2322. This structure is simple and has a reasonable layout.

[0140] Based on the above examples, please continue to refer to Figure 7 The width w1 of the swing arm body 2321 along the extending direction of the rotation axis is smaller than the distance w2 between the first matching portion 2311 and the third matching portion 2313 along the extending direction of the rotation axis.

[0141] Based on this, the end of the first matching portion 2311 away from the fixing portion 2317 is the first end D1, and the end of the third matching portion 2313 away from the fixing portion 2317 is the second end D2. Figure 7 The swing arm body 2321 is located between the first end D1 and the second end D2.

[0142] In this way, on the one hand, when the first swing arm 232 is in the unfolded position, the thickness of the swing arm body 2321 and the first matching portion 2311 and the third matching portion 2313 can be avoided to overlap, which is conducive to reducing the thickness of the rotating shaft base 231. On the other hand, the height of the first end D1 and the second end D2 can be increased. When the first swing arm 232 is in the folded position, please refer to Fig. 9, the overlap width between the fourth matching portion 2322a and the first concave arc surface m1, and between the sixth matching portion 2322c and the second concave arc surface m2 can be increased to prevent jamming. On the other hand, 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 respectively located on opposite sides of the swing arm body 2321, so that the first end D1 and the second end D2 can be connected with other parts of the shaft base 231, and local protrusion can be avoided. Therefore, when the first swing arm 232 is in the unfolded position, the flatness of the front side of the shaft mechanism 23 can be improved, and the reliability of the shaft mechanism 23 when the ball falls and the tip impacts can be improved.

[0143] In some embodiments, see Figure 7 and Figure 8 , the rotating shaft base 231 is provided with at least one avoidance hole c1. "At least one" means one or more than one. At least one avoidance hole c1 passes through the front side of the rotating shaft base 231. In some embodiments, please refer to Figure 8 , at least one avoidance hole c is provided on the upper base 231a.

[0144] Based on this, when the first swing arm 232 is in the unfolded position, please refer to Figure 7 and Figure 8 The end of the fourth matching portion 2322a away from the swing arm body 2321, the end of the fifth matching portion 2322b away from the swing arm body 2321, and the end of the sixth matching portion 2322c away from the swing arm body 2321 are accommodated in the at least one avoidance hole c1.

[0145] In this way, with the help of at least one avoidance hole c1, the end of the fourth matching part 2322a away from the swing arm body 2321, the end of the fifth matching part 2322b away from the swing arm body 2321, and the end of the sixth matching part 2322c away from the swing arm body 2321 are avoided, which can avoid thickness overlap and reduce the thickness of the hinge base 231, which is conducive to the thinning of the electronic device 100.

[0146] In some embodiments, please refer to Figure 7 and Figure 8 The shaft base 231 further includes a first connecting portion 2318, which is connected between the second matching portion 2312 and the fixing portion 2317. Specifically, the first connecting portion 2318 can be connected between the second matching portion 2312 and the upper fixing portion 2317a.

[0147] On the basis of the above, please refer to Fig.11 The end of the fifth matching portion 2322b away from the swing arm body 2321 is the third end D3, and the third end D3 is provided with an avoidance gap c2.

[0148] When the first swing arm 232 is in the extended position, see Fig.15 , Fig.15 for Figure 7 In the three-dimensional cross-sectional view of the rotating shaft mechanism 23 along the CC line, the first connecting portion 2318 is accommodated in the avoiding gap c2.

[0149] In this way, by using the first connecting portion 2318 to fix the second matching portion 2312 on the fixing portion 2317, it is possible to avoid the second matching portion 2312 being suspended in the air, thereby improving the structural strength.

[0150] Based on the above embodiments, please refer to Fig.11 The inner wall surface of the avoidance gap c2 away from the third end D3 is the first stop surface mk. When the first swing arm 232 is in the unfolded position, please continue to refer to Fig.15 , the first stop surface mk contacts the back side of the first connecting portion 2318. In this way, the first stop surface mk cooperates with the back side of the first connecting portion 2318 to stop the first swing arm 232.

[0151] In some embodiments, please refer back to Fig.14 , the end surface of the second limiting portion 2315 away from the fixing portion 2317 is the second stop surface mj. When the first swing arm 232 is in the unfolded position, please continue to refer to Fig.15 , the second stop surface mj contacts the back side of the swing arm body 2321. In this way, by means of the second stop surface mj cooperating with the back side of the swing arm body 2321, the first swing arm 232 can be further stopped.

[0152] In other embodiments, the second matching portion 2312 and the fixing portion 2317 may also be spaced apart, and the gap between the second matching portion 2312 and the fixing portion 2317 forms a part of the at least one avoidance hole c1.

[0153] The following embodiments are further limited on the basis that the first connecting portion 2318 is connected between the second matching portion 2312 and the fixing portion 2317 , which cannot be regarded as a special limitation on the specific structure of the rotating shaft mechanism 23 .

[0154] Please return to Figure 7 and Figure 8 The at least one avoidance hole c1 includes a first avoidance hole c11 and a second avoidance hole c12 that are spaced apart. The arrangement direction of the first avoidance hole c11 and the second avoidance hole c12 is parallel to the extension direction of the rotation axis, and the first avoidance hole c11 and the second avoidance hole c12 are respectively located on opposite sides of the first connection portion 2318.

[0155] Also, see Figure 7 The first avoidance hole c11 is located between the first limiting portion 2314 and the upper fixing portion 2317a, and the second avoidance hole c12 is located between the third limiting portion 2316 and the upper fixing portion 2317a.

[0156] On the basis of the above, when the first swing arm 232 is in the unfolded position, please refer to Figure 7 The end of the fourth matching portion 2322a away from the swing arm body 2321 is accommodated in the first avoidance hole c11, and the end of the sixth matching portion 2322c away from the swing arm body 2321 is accommodated in the second avoidance hole c12.

[0157] The layout is reasonable and the structure is simple.

[0158] Based on the above examples, please refer to Fig.11 , a width w3 of the avoidance gap c2 along the extending direction of the rotation axis is smaller than a width w4 of the fifth matching portion 2322b along the extending direction of the rotation axis.

[0159] Based on this, please continue to refer to Fig.11 , define the portion of the fifth matching portion between the fourth matching portion 2322a and the avoidance gap c2 as the first sub-portion K1, and the portion of the fifth matching portion between the sixth matching portion 2322c and the avoidance gap c2 as the second sub-portion K2.

[0160] When the first swing arm 232 is in the extended position, please refer to Figure 7 The end of the first sub-portion K1 away from the swing arm body 2321 is accommodated in the above-mentioned first avoidance hole c11, and the end of the second sub-portion K2 away from the swing arm body 2321 is accommodated in the above-mentioned second avoidance hole c12.

[0161] In this way, on the one hand, the contact area between the fifth matching portion 2322b and the first convex arc surface n1 can be increased by means of the first sub-portion K1 and the second sub-portion K2 to avoid stress concentration. On the other hand, by means of the first avoidance hole c11 and the second avoidance hole c12, the thickness overlap between the first sub-portion K1, the second sub-portion K2 and the base 231 can be avoided, and the thickness of the base 231 can be reduced, which is conducive to the thinning of the whole machine.

[0162] In some embodiments, see Fig.11 The rotating end 2322 of the first swing arm 232 further includes a second connecting portion 2322d, and the second connecting portion 2322d is disposed between the fourth matching portion 2322a and the fifth matching portion 2322b.

[0163] In this way, with the help of the second connecting portion 2322d, the distance between the fourth matching portion 2322a and the fifth matching portion 2322b in the extending direction of the rotation axis can be increased, and the structural strength of the rotating end 2322 can be improved.

[0164] Based on the above, please refer back to Figure 8 Another part of the first limiting portion 2314 is located at the front side of the second connecting portion 2322d.

[0165] Based on this, please continue to refer to Fig.11 The front side surface of the second connecting portion 2322d is a concave arc surface, which is coplanar with the fourth concave arc surface m4, and faces the fourth convex arc surface n4 of the first limiting portion 2314.

[0166] In this way, the second connection part 2322d can also be separated from the folding screen 10 with the help of the first limiting part 2314 to avoid the second connection part 2322d from generating relative movement with the folding screen 10 and generating friction, wear and noise during the movement of the fourth matching part 2322a and the fifth matching part 2322b.

[0167] In some embodiments, see Fig.12 The back side surface of the second connecting portion 2322d is coplanar with the fifth convex arc surface n5. In this way, the second connecting portion 2322d has a larger thickness, which can improve the structural strength of the rotating end 2322. At the same time, the profile of the first swing arm 232 is simple, which can reduce the difficulty and cost of processing.

[0168] In some embodiments, see Figure 8 Another part of the second limiting portion 2315 is also located on the back side of the second connecting portion 2322d. In this way, the second limiting portion 2315 can also shield and protect the second connecting portion 2322d, preventing the second connecting portion 2322d from being exposed on the back side of the rotating shaft base 231, thereby ensuring the aesthetics of the whole machine.

[0169] In some embodiments, please refer to Figure 7 The end of the second connection part 2322d away from the swing arm body 2321 is accommodated in the first avoidance hole c11. In this way, the end of the second connection part 2322d away from the swing arm body 2321 can be avoided by the first avoidance hole c11, so as to avoid thickness overlap and reduce the thickness of the rotating shaft base 231.

[0170] In some other embodiments, the shaft base 231 may further form an opening on the front side of the second connecting portion 2322d, which is not specifically limited in the present application.

[0171] In some embodiments, please refer to Fig.11 The rotating end 2322 further includes a first supporting portion 2322e, which is disposed between the fourth matching portion 2322a and the second connecting portion 2322d.

[0172] Based on this, see Fig.12 , the end of the first support portion 2322e away from the swing arm body 2321 is defined as the first support end D4, and the back side surface of the first support end D4 is provided with a first stop protrusion N1.

[0173] Accordingly, see Fig.14 The shaft base 231 also includes a second support portion 2319, which is located at Fig.11 The back side of the first supporting portion 2322e is shown, and the second supporting portion 2319 is connected between the first matching portion 2311 and the third matching portion 2313. Specifically, the second supporting portion 2319 can be connected between the first matching portion 2311 and the second limiting portion 2315. The end of the second supporting portion 2319 away from the fixing portion 2317 is defined as the second supporting end D5, and the front side of the second supporting end D5 is provided with a second stop protrusion N2.

[0174] When the first swing arm 232 is in the folded position, see Fig.16 , Fig.16 for Figure 7 The illustrated three-dimensional cross-sectional view of the rotating shaft mechanism 23 along line DD when the first swing arm 232 is in the folded position, wherein the first stop protrusion N1 is located on the side of the second stop protrusion N2 facing the fixing portion 2317 and contacts the second stop protrusion N2.

[0175] In this way, the first swing arm 232 can be limited when it is in the folded position to prevent the first swing arm 232 from being separated from the shaft base 231, thereby ensuring the connection stability.

[0176] In the above embodiment, optionally, see Fig.12 The back side surface of the first supporting portion 2322e may be coplanar with the back side surface of the fourth matching portion 2322a (ie, the second convex arc surface n2). Fig.14 The front side surface of the second supporting portion 2319 can be coplanar with the front side surface of the second limiting portion 2315 (that is, the fifth concave arc surface m5).

[0177] In this way, the first swing arm 232 and the rotating shaft base 231 have simple profiles, which can reduce the processing difficulty and cost.

[0178] In some embodiments, when the first swing arm 232 is in the extended position, please refer to Figure 7 The first support end D4 and the first stop protrusion N1 can be accommodated in the first avoidance hole c11. In this way, the thickness overlap can be avoided, the thickness of the rotating shaft base 231 can be reduced, and the whole machine can be made thinner.

[0179] In some embodiments, see Fig.11The rotating end 2322 further includes a third connecting portion 2322f, which is disposed between the fifth matching portion 2322b and the sixth matching portion 2322c. The structure of the third connecting portion 2322f may be the same as that of the second connecting portion 2322d, and will not be described in detail herein.

[0180] Please continue reading Fig.11 The rotating end 2322 further includes a third supporting portion 2322g, which is disposed between the third connecting portion 2322f and the sixth matching portion 2322c, and a third stop protrusion N3 is disposed on the third supporting portion 2322g. The structure of the third supporting portion 2322g may be the same as that of the first supporting portion 2322e, and the structure of the third stop protrusion N3 may be the same as that of the first stop protrusion N1, which will not be described in detail herein.

[0181] On the basis of the above, please refer to Fig.14 The shaft base 231 further includes a fourth support portion 2320, which is located at Fig.11 and Fig.12 The fourth support portion 2320 is connected between the third matching portion 2313 and the first matching portion 2311, and specifically, the fourth support portion 2320 is connected between the third matching portion 2313 and the second limiting portion 2315, and a fourth stop protrusion N4 is provided on the fourth support portion 2320. The structure of the fourth support portion 2320 can be the same as that of the second support portion 2319, and the structure of the fourth stop protrusion N4 can be the same as that of the second stop protrusion N2, which will not be described in detail. 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.

[0182] In some embodiments, see Fig.13 At least one limiting column is disposed on the upper base 231a. Optionally, the at least one limiting column includes a first limiting column h1 and a second limiting column h2. Fig.14 At least one limiting hole is provided on the lower base 231b. 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 column h1, and the second limiting hole f2 is used to cooperate with the second limiting column h2 to achieve limiting, thereby ensuring the positioning accuracy between the upper base 231a and the lower base 231b and preventing the two from being misaligned.

[0183] In some other embodiments, the first limiting column h1 and the second limiting column h2 may also be arranged on the lower base 231b, and the first limiting hole f1 and the second limiting hole f2 may be arranged on the upper base 231a, which is not specifically limited in the present application.

[0184] See also Fig.17 , Fig.17 This is a three-dimensional diagram of the shaft mechanism 23 provided in some other embodiments of the present application. In this embodiment, a receiving groove c3 is provided on the shaft base 231, and the receiving groove c3 passes through the front side of the shaft base 231. At least one of the fourth matching portion 2322a, the first supporting portion 2322e and the second connecting portion 2322d is received in the receiving groove c3. Fig.17 In the embodiment shown, the fourth matching portion 2322a, the first supporting portion 2322e and the second connecting portion 2322d are all accommodated in the receiving groove c3. This structure is simple, and the structural strength of the rotating end 2322 is relatively large, which can improve the connection strength between the first swing arm 232 and the rotating shaft base 231.

[0185] In another embodiment, see Fig.18 , Fig.18 The three-dimensional diagram of the rotating shaft mechanism 23 provided in some other embodiments of the present application. In this embodiment, the first supporting portion 2322e and the second connecting portion 2322d are accommodated in 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.

[0186] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0187] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: include: The rotating shaft base comprises a first matching portion, a second matching portion, and a third matching portion which are sequentially arranged along the extending direction of the rotating axis, wherein: The front side surface of the first matching portion is a first concave arc surface, the back side surface of the second matching portion is a first convex arc surface, and the front side surface of the third matching portion is a second concave arc surface; 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 rotation axis; A first swing arm, the first swing arm comprises a rotating end, the rotating end comprises a fourth matching portion, a fifth matching portion and a sixth matching portion, the fourth matching portion is located at the front side of the first matching portion, the fifth matching portion is located at the back side of the second matching portion, and the sixth matching portion is located at the front side of the third matching portion; The fourth matching portion, the fifth matching portion and the sixth matching portion 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 between the unfolded position and the folded position around the rotation axis relative to the rotation axis base.

2. The rotating shaft mechanism according to claim 1, characterized in that: The back side surface of the fourth matching portion is a second convex arc surface, and the second convex arc surface is in matching contact with the first concave arc surface; The front side surface of the fifth matching portion is a third concave arc surface, and the third concave arc surface is in matching contact with the first convex arc surface; The back side surface of the sixth matching portion is a third convex arc surface, and the third convex arc surface is in matching contact with the second concave arc surface.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that: The radius of the first concave arc surface is equal to the radius of the second concave arc surface.

4. The rotating shaft mechanism according to any one of claims 1 to 3, characterized in that: The rotating shaft 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 matching portion; The back side surface of the first limiting portion is a fourth convex arc surface, and the front side surface of the fourth matching portion 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 colinear with the rotation axis, and the fourth convex arc surface faces the fourth concave arc surface.

5. The rotating shaft mechanism according to claim 4, characterized in that: The fourth convex arc surface and the fourth concave arc surface are arranged at intervals.

6. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that: The rotating shaft base also includes a second limiting portion; At least a portion of the second limiting portion is disposed on the back side of the fifth matching portion; The front side surface of the second limiting portion is a fifth concave arc surface, and the back side surface of the fifth matching 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 colinear with the rotation axis, and the fifth concave arc surface faces the fifth convex arc surface.

7. The rotating shaft mechanism according to claim 6, characterized in that: The fifth concave arc surface and the fifth convex arc surface are arranged at intervals.

8. The rotating shaft mechanism according to any one of claims 1 to 7, characterized in that: The rotating shaft base further comprises a fixing portion, wherein the first matching portion, the second matching portion and the third matching portion are arranged on the same side of the fixing portion; The first swing arm further comprises a swing arm body, and the rotating end is arranged at one end of the swing arm body; When the first swing arm is in the expanded position, the swing arm body and the fixing portion are respectively located on opposite sides of the rotating end.

9. The rotating shaft mechanism according to claim 8, characterized in that: The width of the swing arm body along the extending direction of the rotation axis is smaller than the distance between the first matching portion and the third matching portion along the extending direction of the rotation axis; The end of the first matching portion away from the fixing portion is a first end, and the end of the third matching portion away from the fixing portion is a second end; When the first swing arm is in the deployed position, the swing arm body is located between the first end and the second end.

10. The rotating shaft mechanism according to claim 8 or 9, characterized in that: The rotating shaft base is provided with at least one avoidance hole, and the at least one avoidance hole passes through the front side surface of the rotating shaft base; When the first swing arm is in the deployed position, the end of the fourth matching portion away from the swing arm body, the end of the fifth matching portion away from the swing arm body, and the end of the sixth matching portion away from the swing arm body are accommodated in the at least one avoidance hole.

11. The rotating shaft mechanism according to claim 10, characterized in that: The rotating shaft base further includes a first connecting portion, wherein the first connecting portion is connected between the second matching portion and the fixing portion; The end of the fifth matching portion away from the swing arm body is a third end, and the third end is provided with an avoidance notch; When the first swing arm is in the deployed position, the first connecting portion is accommodated in the avoidance gap.

12. The rotating shaft mechanism according to claim 11, characterized in that: The inner wall surface of the avoidance gap away from the third end is a first inner wall surface; When the first swing arm is in the deployed position, the first inner wall surface contacts the back side surface of the first connecting portion.

13. The rotating shaft mechanism according to claim 11 or 12, characterized in that: The at least one avoidance hole comprises a first avoidance hole and a second avoidance hole which are arranged at intervals; The arrangement direction of the first avoidance hole and the second avoidance hole is parallel to the extension direction of the rotation axis, and the first avoidance hole and the second avoidance hole are respectively located on two opposite sides of the first connecting portion; When the first swing arm is in the deployed position, the end of the fourth matching portion away from the swing arm body is accommodated in the first avoidance hole, and the end of the sixth matching portion away from the swing arm body is accommodated in the second avoidance hole.

14. The rotating shaft mechanism according to claim 13, characterized in that: The width of the avoidance notch along the extension direction of the rotation axis is smaller than the width of the fifth matching portion along the extension direction of the rotation axis; The portion of the fifth matching portion between the fourth matching portion and the avoidance gap is the first sub-portion, and the portion of the fifth matching portion between the sixth matching portion and the avoidance gap is the second sub-portion; When the first swing arm is in the deployed position, the end of the first sub-portion away from the swing arm body is accommodated in the first avoidance hole, and the end of the second sub-portion away from the swing arm body is accommodated in the second avoidance hole.

15. The rotating shaft mechanism according to any one of claims 1 to 14, characterized in that: The rotating end further includes a second connecting portion, and the second connecting portion is arranged between the fourth matching portion and the fifth matching portion.

16. The rotating shaft mechanism according to claim 15, characterized in that: The rotating end further includes a first supporting portion, the first supporting portion is arranged between the fourth matching portion and the second connecting portion, and the end of the first supporting portion away from the swing arm body is the first supporting end, and the back side surface of the first supporting end is provided with a first stop protrusion; The shaft base further includes a second supporting portion, the second supporting portion is located on the back side of the first supporting portion, and the second supporting portion is arranged between the first matching portion and the third matching portion, the end of the second supporting portion away from the fixing portion is a second supporting end, and a second stop protrusion is arranged on the front side of the second supporting end; When the first swing arm is in the folded position, the first stop protrusion is located on a side of the second stop protrusion facing the fixing portion and contacts the second stop protrusion.

17. The rotating shaft mechanism according to claim 16, characterized in that: The rotating shaft base is provided with a receiving groove, and the receiving groove passes through the front side surface of the rotating shaft base; At least one of the fourth matching portion, the first supporting portion and the second connecting portion is accommodated in the accommodating groove.

18. The rotating shaft mechanism according to any one of claims 1 to 17, 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 is fixedly connected to the lower base; The second matching portion constitutes a portion of the upper base, and the first matching portion and the third matching portion constitute a portion of the lower base.

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

20. The electronic device according to claim 19, characterized in that: Also includes: A folding screen, the folding screen comprising a first display area and a second display area; The first structural member carries the first display area, the hinge mechanism carries the second display area, and the second display area is located at the front side of the hinge mechanism.

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