Rotating shaft mechanism and foldable electronic device

Abstract

The embodiment of the present application provides a pivot mechanism and a foldable electronic device, wherein the pivot mechanism comprises a base, a swing arm and a shaft cover, the swing arm is arranged on both sides of the axis direction of the base, the swing arm is rotationally connected with the base, so that the swing arm can be switched between an unfolded state and a folded state relative to the base, the shaft cover has a first accommodating groove, at least part of the base is located in the first accommodating groove, the first protruding part is arranged on the inner side wall of both sides of the shaft cover, the second protruding part is arranged on the outer side wall of both sides of the base, and the first protruding part is clamped with the second protruding part. The pivot mechanism and the foldable electronic device provided by the embodiment of the present application can improve the connection stability of each component in the thickness direction of the pivot mechanism, and can alleviate or solve the problems of screw loosening, welding fracture and glue separation of the pivot mechanism.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a pivot mechanism and a foldable electronic device. Background Technology

[0002] With the gradual development of flexible screen technology, foldable electronic devices have emerged. Foldable electronic devices, with their larger display area and excellent portability, have become a hot technology today. A typical foldable electronic device includes a first main body, a second main body, a hinge mechanism, and a flexible screen. The flexible screen covers the first and second main bodies. The first and second main bodies are located on either side of the hinge mechanism and connected to it. Both the first and second main bodies can rotate relative to the hinge mechanism to fold the flexible screen together or unfold it.

[0003] A hinge mechanism typically includes a swing arm and stacked hinge covers and a base, with the swing arm connected to the base. During the opening and closing of a foldable electronic device, the first and second main bodies are subjected to force, which is transmitted to the base via the swing arm. When this force exceeds a certain value, problems such as loose screws, broken welds, and delamination may occur between the hinge cover and the base. Summary of the Invention

[0004] This application provides a pivot mechanism and a foldable electronic device, which can improve the connection stability of the components in the thickness direction of the pivot mechanism and alleviate or solve problems such as loose screws, broken welds, and delamination in the pivot mechanism.

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

[0006] In a first aspect, embodiments of this application provide a rotating shaft mechanism, including a base, a swing arm, and a shaft cover. The swing arm is disposed on both sides of the base along its axial direction. The swing arm is rotatably connected to the base so that the swing arm can switch between an unfolded state and a folded state relative to the base. The shaft cover has a first receiving groove, at least a portion of the base is located in the first receiving groove, and the inner sidewalls on both sides of the shaft cover have first protrusions, and the outer sidewalls on both sides of the base have second protrusions. The first protrusions and the second protrusions engage with each other.

[0007] The hinge mechanism of this application embodiment, by providing first protrusions on the inner sidewalls of both sides of the hinge cover and second protrusions on the outer sidewalls of both sides of the base, and by engaging the first and second protrusions to fix the hinge cover and the base, enhances the structural reliability of the hinge mechanism. Compared with screw fastening between the hinge cover and the base, it reduces the space occupied by screws and screw holes, which is beneficial for weight reduction of the hinge mechanism and thus for the lightweighting of foldable electronic devices. Compared with adhesive bonding between the hinge cover and the base, it reduces the space occupied by the glue groove, avoids the impact of glue overflow, and avoids the problem of weak adhesion. Furthermore, the engagement of the first and second protrusions in this application provides better connection stability than adhesive bonding, and is less prone to detachment after engagement. Compared with welding between the hinge cover and the base, it avoids the risk of incomplete welding. The first and second protrusions will not suffer irreparable damage after being subjected to force, which can extend the service life of the hinge mechanism and facilitate future maintenance of the hinge mechanism. In addition, the method of engaging the first protrusion and the second protrusion in the rotating shaft mechanism provided in this application to achieve connection stability between the shaft cover and the base can also be used as a reinforcement method implemented on the basis of screw fastening, bonding and / or welding, thereby further enhancing the connection stability in the thickness direction between the shaft cover and the base.

[0008] In one possible implementation, the inner sidewall of the shaft cover has a first inclined surface extending from the first protrusion toward the opening of the first receiving groove, and the first inclined surface also extending from the first protrusion toward the axis away from the base. The outer sidewall of the base has a second inclined surface extending from the second protrusion away from the opening of the first receiving groove, and the second inclined surface also extending from the second protrusion toward the axis of the base. The first inclined surface and the second inclined surface are used to slide relative to each other to guide the first protrusion to engage with the second protrusion.

[0009] In this way, the assembly and fastening between the base and the bearing cover is convenient and easy to operate, which can save a lot of assembly time between the base and the bearing cover.

[0010] In one possible implementation, the first protrusion is a first stepped surface perpendicular to the thickness direction of the shaft cover, and the first stepped surface is connected to the first inclined surface; the second protrusion is a second stepped surface perpendicular to the thickness direction of the base, and the second stepped surface is connected to the second inclined surface.

[0011] Since both the first and second stepped surfaces are perpendicular to the thickness direction of the rotating shaft mechanism, the connection stability between the base and the shaft cover in the thickness direction can be further improved after the first and second protrusions are engaged. The first stepped surface is connected to the first inclined surface, and the second stepped surface is connected to the second inclined surface. Through the sliding cooperation of the first and second inclined surfaces, the first stepped surface can be directly guided to engage with the second stepped surface, making the assembly method simple and easy.

[0012] In one possible implementation, there are multiple first protrusions and multiple second protrusions, which are spaced apart along the axial direction of the base. Alternatively, the first protrusions extend from one end of the shaft cover to the other end of the shaft cover along the axial direction of the base, and the second protrusions extend from one end of the base to the other end of the base along the axial direction of the base.

[0013] This improves the connection stability between the base and the bearing cap.

[0014] In one possible implementation, the base includes a first base and a second base, the first base having a second receiving groove, at least a portion of the second base being located in the second receiving groove, and the second base being farther away from the shaft cover than the first base, one end of the swing arm connected to the base being clamped between the first base and the second base, the inner sidewalls of both sides of the first base having a third protrusion, and the outer sidewalls of both sides of the second base having a fourth protrusion, the third protrusion engaging with the fourth protrusion.

[0015] By providing third protrusions on the inner sidewalls of both sides of the first base and fourth protrusions on the outer sidewalls of both sides of the second base, and by engaging the third and fourth protrusions to fix the first and second bases, the structural reliability of the hinge mechanism can be enhanced. Compared with screw fastening between the first and second bases, the space occupied by screws and screw holes can be reduced, which is beneficial to the weight reduction of the hinge mechanism and thus to the lightweighting of foldable electronic devices. Compared with adhesive bonding between the first and second bases, the space occupied by the adhesive groove can be reduced, the influence of adhesive overflow can be avoided, and the problem of weak adhesive bonding can be avoided. Furthermore, the engagement of the third and fourth protrusions in this application has better connection stability than adhesive bonding, and it is less likely to come loose after engagement. Compared with welding between the first and second bases, the risk of poor welding can be avoided. The third and fourth protrusions will not suffer irreparable damage after being subjected to force, which can extend the service life of the hinge mechanism and facilitate future maintenance of the hinge mechanism. In addition, the method of engaging the third protrusion and the fourth protrusion in the rotating shaft mechanism provided in this application to achieve connection stability between the first base and the second base can also be used as a reinforcement method implemented on the basis of screw fastening, bonding and / or welding, thereby further strengthening the connection stability in the thickness direction between the first base and the second base.

[0016] In one possible implementation, the inner wall of the first base has a third inclined surface extending from the third protrusion toward the opening of the second receiving groove, and the third inclined surface extending from the third protrusion toward the axis away from the base. The outer wall of the second base has a fourth inclined surface extending from the fourth protrusion away from the opening of the second receiving groove, and the fourth inclined surface extending from the fourth protrusion toward the axis of the base. The third inclined surface and the fourth inclined surface are used to slide relative to each other to guide the third protrusion to engage with the fourth protrusion.

[0017] In this way, the assembly and fastening between the first base and the second base is convenient and easy to operate, which can save a lot of assembly time between the base and the shaft cover.

[0018] In one possible implementation, the third protrusion is a third step surface perpendicular to the thickness direction of the first base, and the third step surface is connected to the third inclined surface; the fourth protrusion is a fourth step surface perpendicular to the thickness direction of the second base, and the fourth step surface is connected to the fourth inclined surface.

[0019] Since both the third and fourth stepped surfaces are perpendicular to the thickness direction of the rotating shaft mechanism, the connection stability between the base and the shaft cover in the thickness direction can be further improved after the third and fourth protrusions are engaged. The third stepped surface is connected to the third inclined surface, and the fourth stepped surface is connected to the fourth inclined surface. Through the sliding cooperation between the third and fourth inclined surfaces, the third stepped surface can be directly guided to engage with the fourth stepped surface, making the assembly method simple and easy to implement.

[0020] In one possible implementation, there are multiple third protrusions and multiple fourth protrusions, which are spaced apart along the axial direction of the base. Alternatively, the third protrusions extend from one end of the first base to the other end of the first base along the axial direction of the base, and the fourth protrusions extend from one end of the second base to the other end of the second base along the axial direction of the base.

[0021] This improves the connection stability between the first base and the second base.

[0022] In one possible implementation, the rotating shaft mechanism further includes: a first fastener, wherein the first base has a first mounting hole along the thickness direction of the base, and the second base has a second mounting hole along the thickness direction of the base, and the first fastener passes through the first mounting hole and the second mounting hole to lock the second base to the first base.

[0023] By using a snap-fit ​​method combining the first fastener with the third and fourth protrusions, a double fastening effect can be formed between the first base and the second base, improving the connection stability between the first base and the second base.

[0024] In one possible implementation, the second base is connected to the first base by adhesive bonding and / or welding.

[0025] In this way, multiple fastening effects can be formed between the first base and the second base, improving the connection stability between the first base and the second base.

[0026] In one possible implementation, the rotating shaft mechanism further includes: a second fastener, an assembly post provided on the shaft cover, the assembly post having a third assembly hole, a fourth assembly hole provided along the thickness direction of the base, the assembly post passing through the fourth assembly hole, and the second fastener being assembled in the third assembly hole to lock the base to the shaft cover.

[0027] By employing a second fastener in conjunction with the snap-fit ​​mechanism of the first and second protrusions, a double-fastening effect is achieved between the shaft cover and the base, improving the connection stability between them. Furthermore, the mounting post is located on the inner side of the shaft cover, which contributes to enhancing the refined appearance of the foldable electronic device.

[0028] In one possible implementation, the base is connected to the shaft cover by adhesive bonding and / or welding.

[0029] This creates multiple fastening effects between the base and the bushing, improving the connection stability between them.

[0030] In one possible implementation, the shaft cover is provided with a guide post, and the base is provided with a guide hole, through which the guide post passes.

[0031] The guide post and guide hole fit together to facilitate the assembly between the base and the bushing, and also provide a limiting function to prevent the base from shifting relative to the bushing.

[0032] Secondly, embodiments of this application provide a foldable electronic device, including: a flexible screen, at least two main bodies, and at least one pivot mechanism as described above. Two adjacent main bodies are respectively connected to both sides of the axial direction of the base of one pivot mechanism. The two adjacent main bodies are relatively unfolded and folded through the pivot mechanism. The flexible screen is attached to one side of at least two main bodies and at least one pivot mechanism.

[0033] The foldable electronic device provided in this application includes the hinge mechanism shown above. The technical features, the technical effects achieved by the hinge mechanism, and the technical problems that the technical effects can solve are all the same as those of the hinge mechanism shown above, and will not be repeated here. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a foldable electronic device provided in an embodiment of this application;

[0035] Figure 2 A schematic diagram of the disassembled structure of a foldable electronic device provided in an embodiment of this application;

[0036] Figure 3 A schematic diagram of a flexible screen for a foldable electronic device provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram illustrating the switching between the folded and unfolded states of a foldable electronic device provided in an embodiment of this application.

[0038] Figure 5This is a partial structural schematic diagram of a rotating shaft mechanism provided in an embodiment of this application;

[0039] Figure 6 for Figure 5 An enlarged schematic diagram of part A of the rotating shaft mechanism shown in the figure;

[0040] Figure 7 According to Figure 6 The exploded structural diagram of part of the rotating shaft mechanism shown in the figure;

[0041] Figure 8 A cross-sectional schematic diagram of a portion of the structure of a rotating shaft mechanism provided in an embodiment of this application. Figure 1 ;

[0042] Figure 9 This is a partial structural schematic diagram of a base provided in one embodiment of this application;

[0043] Figure 10 This is a partial structural schematic diagram of a shaft cover provided in one embodiment of this application;

[0044] Figure 11 This is a schematic diagram of the assembly of the base and the shaft cover according to an embodiment of this application;

[0045] Figure 12 This is a partial structural schematic diagram of a rotating shaft mechanism provided in an embodiment of this application;

[0046] Figure 13 A cross-sectional schematic diagram of a portion of the structure of a rotating shaft mechanism provided in an embodiment of this application. Figure 2 ;

[0047] Figure 14 This is a partial structural schematic diagram of a first base provided in an embodiment of this application;

[0048] Figure 15 This is a partial structural schematic diagram of the second base provided in one embodiment of this application;

[0049] Figure 16 A schematic diagram of the assembled structure of the shaft cover, the first base, and the second base according to an embodiment of this application;

[0050] Figure 17 This is a cross-sectional schematic diagram of a portion of the structure of a rotating shaft mechanism provided in an embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100 - Foldable electronic devices;

[0053] 110 - Flexible screen; 110a - First fixing part; 110b - Second fixing part; 110c - Bending part;

[0054] 120 - First main body section; 130 - Second main body section;

[0055] 200-Rotating shaft mechanism;

[0056] 210 - Base; 211 - Second protrusion; 212 - Second inclined surface; 212a - Second stepped surface; 213 - First base; 2131 - Third protrusion; 2131a - Third stepped surface; 2132 - Third inclined surface; 2133 - Second receiving groove; 2134 - First mounting hole; 214 - Second base; 2141 - Fourth protrusion; 2141a - Fourth stepped surface; 2142 - Fourth inclined surface; 2143 - Second mounting hole; 215 - Fourth mounting hole; 216 - Guide hole;

[0057] 220 - Shaft cover; 221 - First protrusion; 221a - First stepped surface; 222 - First inclined surface; 223 - First receiving groove; 224 - Assembly post; 2241 - Third assembly hole; 225 - Guide post;

[0058] 230 - Swing arm; 240 - First fastener; 250 - Second fastener. Detailed Implementation

[0059] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0060] Foldable electronic devices are a type of electronic device that has a hinge mechanism to enable unfolding and folding. Foldable electronic devices can change the state of the hinge mechanism, allowing them to unfold or fold to meet different usage requirements.

[0061] The foldable electronic devices provided in this application can be terminal products such as mobile phones, tablets, televisions, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) devices, and augmented reality (AR) devices, or professional shooting equipment such as digital cameras, SLR cameras, mirrorless cameras, and action cameras. This application does not limit the specific type of foldable electronic device; any electronic device with a hinge mechanism is acceptable. For ease of understanding, this application uses a foldable mobile phone as an example for illustration.

[0062] Figure 1 This is a schematic diagram of the structure of a foldable electronic device 100 provided in an embodiment of this application. Figure 2This is a schematic diagram of the disassembled structure of a foldable electronic device 100 provided in an embodiment of this application, with reference to... Figure 1 and Figure 2 As shown, the foldable electronic device 100 provided in this embodiment includes: a flexible screen 110, a first main body 120, a second main body 130, and a hinge mechanism 200. The first main body 120 and the second main body 130 are respectively connected to both sides of the hinge mechanism 200 along its axial direction, and the hinge mechanism 200 enables the first main body 120 and the second main body 130 to be relatively unfolded and folded. The structures of the first main body 120 and the second main body 130 may be the same, not exactly the same, or completely different.

[0063] It should be noted that, in addition to using one pivot mechanism 200 and two main body parts to form a two-layer folding structure, the foldable electronic device 100 provided in this application embodiment can also use multiple pivot mechanisms 200 and two or more main body parts to form a more layered folding mechanism. In this application example, only two main body parts are used as an example for illustration. When the foldable electronic device 100 includes multiple pivot mechanisms 200 and two or more main body parts, two adjacent main body parts are respectively connected to both sides of the axis of a pivot mechanism 200, and the two adjacent main body parts can be relatively unfolded and folded through the pivot mechanism 200.

[0064] The first main body portion 120 and the second main body portion 130 may house the necessary components for the foldable electronic device 100. For example, in some embodiments of this application, the foldable electronic device 100 further includes multiple components (not shown in the figures), which can be installed within the first main body portion 120 and the second main body portion 130. These multiple components may include, for example, a motherboard, processor, internal memory, external memory interface, universal serial bus (USB) interface, charging management module, power management module, battery, antenna, communication module, camera, audio module, speaker, receiver, microphone, headphone jack, sensor module, motor, indicator, and subscriber identification module (SIM) card interface, etc. The foldable electronic device 100 may have more or fewer components than described above, may combine two or more components, or may have different component configurations. Each component can be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits.

[0065] The flexible screen 110 is attached to the surfaces of the first main body 120 and the second main body 130 that are close to or far apart when folded. For example... Figure 1As shown, from the user's perspective, when the foldable electronic device 100 is in a flattened state, the user faces the flexible screen 110, which is attached to the upper surfaces of the first main body 120 and the second main body 130. During the relative unfolding and folding of the first main body 120 and the second main body 130, the flexible screen 110 is also simultaneously unfolded and folded along with the first main body 120 and the second main body 130. When the foldable electronic device 100 includes multiple hinge mechanisms 200 and two or more main bodies, the flexible screen 110 is attached to one side of at least two main bodies and at least one hinge mechanism 200.

[0066] In one configuration, the flexible screen 110 is attached to the surfaces of the first main body 120 and the second main body 130 that are close to each other when folded. When the foldable electronic device 100 is folded, the flexible screen 110 is located inside the first main body 120 and the second main body 130, making the foldable electronic device 100 an inward-folding device. Alternatively, the flexible screen 110 can be attached to the surfaces of the first main body 120 and the second main body 130 that are far apart when folded. When the foldable electronic device 100 is folded, the flexible screen 110 is located outside the first main body 120 and the second main body 130, making the foldable electronic device 100 an outward-folding device. For example... Figure 1 and Figure 2 The foldable electronic device 100 shown is a screen-folding device.

[0067] The foldable electronic device 100 can be unfolded to a flat state, folded to a folded state, or, of course, unfolded or folded to an intermediate state. The intermediate state can be any state between the flat state and the folded state.

[0068] The flexible screen 110 includes a display module capable of displaying images and videos. The display module can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), or a quantum dot light-emitting diode (QLED). Furthermore, in some embodiments of this application, the flexible screen 110 may also include a light-transmitting cover plate, which is disposed on the outside of the display module, i.e., on the side of the display module away from the pivot mechanism 200.

[0069] Figure 3This is a schematic diagram of the flexible screen 110 of a foldable electronic device 100 provided in an embodiment of this application, with reference to... Figure 3 and combined Figure 2 As shown, the flexible screen 110 includes a curved portion 110c and a first fixing portion 110a and a second fixing portion 110b located on both sides of the curved portion 110c. The first fixing portion 110a is assembled to the first main body portion 120, and the second fixing portion 110b is assembled to the second main body portion 130. The curved portion 110c is provided corresponding to the pivot mechanism 200. During the use of the foldable electronic device 100, the first fixing portion 110a and the second fixing portion 110b generally do not deform, while the curved portion 110c deforms to allow the flexible screen 110 to be relatively unfolded and folded. For example, when the foldable electronic device 100 is fully folded, the cross-section of the curved portion 110c along the arrangement direction of the first fixing portion 110a and the second fixing portion 110b can form a teardrop shape or the like.

[0070] It should be noted that, Figure 3 The dashed line is only used to distinguish the areas of the first fixing part 110a, the second fixing part 110b, and the curved part 110c; it is not an indicator of a structural line, and the flexible screen 110 is still a complete screen. Furthermore, the length and width dimensions of the first fixing part 110a and the second fixing part 110b can be the same, not exactly the same, or completely different.

[0071] Because the aforementioned foldable electronic device 100 can switch between an unfolded and folded state, when users browse web pages, access information, watch videos, or play games, they can switch the foldable electronic device 100 from the folded state to the unfolded state, enabling a larger screen display and providing users with richer information and a better user experience. When the user is finished using the foldable electronic device 100, they can switch it from the unfolded state back to the folded state. This reduces the size of the foldable electronic device 100, making it easier to store.

[0072] Figure 4 This is a schematic diagram illustrating the switching between the folded and unfolded states of a foldable electronic device 100 provided in an embodiment of this application. (Refer to...) Figure 4 As shown in the embodiment of this application, the hinge mechanism 200 of the foldable electronic device 100 includes a base 210 and a hinge cover 220. The hinge cover 220 is disposed on the side of the base 210 away from the flexible screen 110. The hinge cover 220 can cover the base 210, which is beneficial to the aesthetic appearance of the foldable electronic device 100. The hinge cover 220 can also protect the base 210 from damage caused by impact. The first main body 120 and the second main body 130 are respectively connected to both sides of the base 210 in the axial direction.

[0073] It is readily understood that when a user drives the first main body 120 and the second main body 130 to rotate relative to the hinge mechanism 200 to unfold or fold the foldable electronic device 100, the force on the first main body 120 and the second main body 130 is transmitted to the hinge mechanism 200. This force tends to cause the base 210 and the cover 220 to separate from each other. Therefore, strengthening the connection between the base 210 and the cover 220 helps to improve the overall reliability of the hinge mechanism 200.

[0074] In related technologies, three methods are generally used to strengthen the connection between the base 210 and the shaft cover 220. The first method is to fasten the base 210 and the shaft cover 220 together with screws. The second method is to bond the base 210 and the shaft cover 220 together with adhesive. The third method is to weld the base 210 and the shaft cover 220 together.

[0075] However, each of the above three methods has its own drawbacks. The first method requires consideration of the screw fastening position, necessitating the provision of screw hole areas on the base 210 and shaft cover 220, which requires significant space to ensure the stability of the fastening between the base 210 and shaft cover 220. Furthermore, it hinders the lightweight design of the rotating shaft mechanism 200. The second method requires pre-reserving adhesive grooves on the base 210 and / or shaft cover 220, occupying considerable space. Additionally, adhesive overflow is prone to occur during the assembly of the base 210 and shaft cover 220. Furthermore, the adhesive may not adhere properly. The third method requires pre-reserving welding grooves on the base 210 and / or shaft cover 220, occupying considerable space. Moreover, the welding method carries the risk of incomplete welds; when the separation force between the base 210 and shaft cover 220 exceeds a certain value, detachment may occur, resulting in irreparable damage that affects the service life of the rotating shaft mechanism 200 and hinders future maintenance.

[0076] In view of this, this application provides a rotating shaft mechanism 200 that replaces the above three methods of fixing the base 210 and the shaft cover 220 together by means of a snap-fit ​​connection. Alternatively, it can be used as a reinforcement scheme between the base 210 and the shaft cover 220 based on the above three methods to improve the connection reliability of the rotating shaft mechanism 200.

[0077] The rotating shaft mechanism 200 provided in this application embodiment will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0078] Figure 5 This is a partial structural schematic diagram of the rotating shaft mechanism 200 provided in one embodiment of this application. Figure 6 for Figure 5 An enlarged structural schematic diagram of part A of the rotating shaft mechanism 200 shown in the figure, for reference. Figure 5 and Figure 6As shown, the rotating shaft mechanism 200 provided in this application embodiment includes: a base 210, a swing arm 230, and a shaft cover 220.

[0079] Specifically, the base 210 and the shaft cover 220 are stacked. A swing arm 230 is provided on both sides of the base 210 along its axial direction. One end of the swing arm 230 is rotatably connected to the base 210, allowing the swing arm 230 to switch between an unfolded and folded state relative to the base 210. The other end of the swing arm 230 is used to connect to the first main body 120 or the second main body 130. The switching between the unfolded and folded states of the swing arm 230 relative to the base 210 enables the foldable electronic device 100 to switch between these states.

[0080] It should be noted that, in order to keep the map concise, Figure 5 The rotating shaft mechanism 200 has omitted some components, retaining only the complete structure of part A. For example, in some embodiments of this application, the rotating shaft mechanism 200 may also include a connecting component, a damping module, a synchronization module, etc.

[0081] The connecting component is connected between the swing arm 230 and the main body, that is, the swing arm 230 is connected to the connecting component, and the connecting component is connected to the main body. The connecting component can enhance the connection stability between the swing arm 230 and the main body.

[0082] The damping module is mounted on the base 210. The damping module is used to provide damping force when the foldable electronic device 100 is in the folded state, during the unfolding process, and in the unfolded state, so that the foldable electronic device 100 can maintain the folded state, the partially unfolded state, and the unfolded state, and improve the user's feel.

[0083] The synchronization module is mounted on the base 210. The synchronization module is used to make the main body parts on both sides of the foldable electronic device 100 rotate synchronously relative to the base 210 during the folding or unfolding process.

[0084] The specific structures and working principles of the connecting components, damping modules, synchronization modules, etc., can be found in relevant technologies, and will not be elaborated upon here.

[0085] Figure 7 According to Figure 6 The exploded structural diagram of the rotating shaft mechanism 200 shown in the figure. Figure 8 A cross-sectional view of a portion of the structure of a rotating shaft mechanism 200 provided in an embodiment of this application. Figure 1 ,refer to Figure 7 and Figure 8As shown, the shaft cover 220 has a first receiving groove 223, and at least a portion of the base 210 is disposed in the first receiving groove 223. The phrase "at least a portion of the base 210 is disposed in the first receiving groove 223" means that the base 210 can be entirely disposed in the first receiving groove 223 or partially disposed in the first receiving groove 223.

[0086] The base 210 can be an integrated base, and the swing arm 230 can be rotatably connected to the base 210 by hinge. Alternatively, it can be rotatably connected to the base 210 by fixing a pivot. An arc-shaped slide can also be provided inside the base 210, and the end of the swing arm 230 connected to the base 210 can slide within the arc-shaped slide to achieve rotatable connection with the base 210.

[0087] Figure 9 This is a partial structural schematic diagram of the base 210 provided in one embodiment of this application. Figure 10 This is a partial structural schematic diagram of the shaft cover 220 provided in one embodiment of this application, with reference to... Figure 8 , Figure 9 and Figure 10 As shown, in the rotating shaft mechanism 200 provided in this application embodiment, the inner sidewalls on both sides of the shaft cover 220 have a first protrusion 221, and the outer sidewalls on both sides of the base 210 have a second protrusion 211, and the first protrusion 221 and the second protrusion 211 are engaged.

[0088] It is understood that the hinge mechanism 200 of this application embodiment, by providing first protrusions 221 on the inner sidewalls of both sides of the hinge cover 220 and second protrusions 211 on the outer sidewalls of both sides of the base 210, and by engaging the first protrusions 221 and the second protrusions 211 to fix the hinge cover 220 and the base 210, can enhance the structural reliability of the hinge mechanism 200. Compared with the method of screw fastening between the hinge cover 220 and the base 210, the space occupied by screws and screw holes can be reduced, which is beneficial to the weight reduction of the hinge mechanism 200, thereby contributing to the lightweighting of the foldable electronic device 100. Compared with the method of bonding between the hinge cover 220 and the base 210, the space occupied by the glue groove can be reduced, the influence of glue overflow can be avoided, and the problem of weak adhesion can be avoided. Furthermore, the engagement of the first protrusions 221 and the second protrusions 211 in this application has better connection stability than adhesive bonding, and it is not easy for them to come off after engagement. Compared to welding the shaft cover 220 to the base 210, this method avoids the risk of incomplete welding. The first protrusion 221 and the second protrusion 211 will not suffer irreparable damage under stress, extending the service life of the shaft mechanism 200 and facilitating future maintenance. Furthermore, the method of engaging the first protrusion 221 and the second protrusion 211 to achieve connection stability between the shaft cover 220 and the base 210 in the shaft mechanism 200 provided in this embodiment can also serve as a reinforcement method implemented based on screw fastening, bonding, and / or welding, thereby further enhancing the connection stability in the thickness direction between the shaft cover 220 and the base 210.

[0089] Of course, this application does not end here. Figure 11 This is a schematic diagram of the assembly of the base 210 and the shaft cover 220 according to an embodiment of this application. (Refer to...) Figure 11 and combined Figure 8 As shown, in some embodiments of this application, the inner wall of the shaft cover 220 has a first inclined surface 222. The first inclined surface 222 extends from the first protrusion 221 toward the opening direction of the first receiving groove 223, and extends from the first protrusion 221 toward the axis away from the base 210. The outer wall of the base 210 has a second inclined surface 212. The second inclined surface 212 extends from the second protrusion 211 away from the opening direction of the first receiving groove 223, and extends from the second protrusion 211 toward the axis of the base 210. The first inclined surface 222 and the second inclined surface 212 can be a plane, an arc surface, or an irregular concave-convex surface, etc.

[0090] The first inclined surface 222 and the second inclined surface 212 are used for relative sliding to guide the first protrusion 221 into engagement with the second protrusion 211. Please refer to... Figure 11As shown, the base 210 can be pressed into the shaft cover 220 with a force of F1, and the first inclined surface 222 and the second inclined surface 212 slide together. The first protrusion 221 and the second protrusion 211 are engaged through the guidance of the first inclined surface 222 and the second inclined surface 212, and the deformation of the base 210 and the shaft cover 220. Alternatively, the shaft cover 220 can be pressed against the base 210 with a force of F2, and the first inclined surface 222 and the second inclined surface 212 slide together. The first protrusion 221 and the second protrusion 211 are engaged through the guidance of the first inclined surface 222 and the second inclined surface 212, and the deformation of the base 210 and the shaft cover 220. This makes the assembly and fastening of the base 210 and the shaft cover 220 convenient and easy to operate, saving a significant amount of assembly time.

[0091] Please continue to refer to this. Figure 8 and Figure 11 As shown, in some embodiments of this application, the first protrusion 221 is a first stepped surface 221a perpendicular to the thickness direction of the shaft cover 220, and the first stepped surface 221a is connected to the first inclined surface 222. The second protrusion 211 is a second stepped surface 212a perpendicular to the thickness direction of the base 210, and the second stepped surface 212a is connected to the second inclined surface 212.

[0092] It is easy to understand that, since both the first stepped surface 221a and the second stepped surface 212a are perpendicular to the thickness direction of the rotating shaft mechanism 200, the connection stability between the base 210 and the shaft cover 220 in the thickness direction can be further improved after the first protrusion 221 and the second protrusion 211 are engaged. The first stepped surface 221a is connected to the first inclined surface 222, and the second stepped surface 212a is connected to the second inclined surface 212. Through the sliding cooperation of the first inclined surface 222 and the second inclined surface 212, the first stepped surface 221a can be directly guided to engage with the second stepped surface 212a, and the assembly method is simple and easy to implement.

[0093] It should be noted that in the rotating shaft mechanism 200 provided in this application embodiment, there can be multiple first protrusions 221 and multiple second protrusions 211. The multiple first protrusions 221 and multiple second protrusions 211 are arranged at intervals along the axial direction of the base 210, thereby ensuring the connection stability between the base 210 and the shaft cover 220. Alternatively, the first protrusions 221 can extend from one end of the shaft cover 220 to the other end of the shaft cover 220 along the axial direction of the base 210, covering the entire length of the shaft cover 220, and the second protrusions 211 can extend from one end of the base 210 to the other end of the base 210 along the axial direction of the base 210, covering the entire length of the base 210, thereby ensuring the connection stability between the base 210 and the shaft cover 220.

[0094] Figure 12This is a partial structural schematic diagram of a rotating shaft mechanism 200 provided in one embodiment of this application. In some embodiments of this application, the base 210 includes a first base 213 and a second base 214.

[0095] The second base 214 can serve as a support plate. The side of the second base 214 closest to the flexible screen 110 can be approximately smooth, thus providing support and protection for the flexible screen 110. The first base 213 and the second base 214 are stacked, and an arc-shaped slide can be formed between the first base 213 and the second base 214. One end of the swing arm 230 connected to the base 210 is sandwiched between the first base 213 and the second base 214. The swing arm 230 can slide in the arc-shaped slide to switch between an unfolded state and a folded state relative to the base 210.

[0096] During the movement of the swing arm 230 within the arc-shaped slide, a separation force is generated between the first base 213 and the second base 214. To enhance the connection stability between the first base 213 and the second base 214... Figure 13 A cross-sectional view of a portion of the structure of a rotating shaft mechanism 200 provided in an embodiment of this application. Figure 2 , Figure 14 This is a partial structural schematic diagram of the first base 213 provided in one embodiment of this application. Figure 15 This is a partial structural schematic diagram of the second base 214 provided in an embodiment of this application, with reference to... Figure 13 , Figure 14 and Figure 15 As shown, the first base 213 has a second receiving groove 2133, and at least a portion of the second base 214 is located in the second receiving groove 2133. "At least a portion of the second base 214 is located in the second receiving groove 2133" means that the second base 214 can be entirely or partially disposed within the second receiving groove 2133. The second base 214 is farther from the shaft cover 220 than the first base 213.

[0097] The first base 213 has a third protrusion 2131 on both inner sidewalls, and the second base 214 has a fourth protrusion 2141 on both outer sidewalls, with the third protrusion 2131 and the fourth protrusion 2141 engaging.

[0098] It is understood that the hinge mechanism 200 of this application embodiment, by providing a third protrusion 2131 on the inner sidewalls of both sides of the first base 213 and a fourth protrusion 2141 on the outer sidewalls of both sides of the second base 214, and by engaging the third protrusion 2131 and the fourth protrusion 2141 to achieve fixation between the first base 213 and the second base 214, can enhance the structural reliability of the hinge mechanism 200. Compared with the method of screw fastening between the first base 213 and the second base 214, the space occupied by screws and screw holes can be reduced, which is beneficial to the weight reduction of the hinge mechanism 200, thereby contributing to the lightweighting of the foldable electronic device 100. Compared with the method of bonding between the first base 213 and the second base 214, the space occupied by the glue groove can be reduced, the influence of glue overflow can be avoided, and the problem of weak adhesion can be avoided. Furthermore, the engagement of the third protrusion 2131 and the fourth protrusion 2141 in this application has better connection stability than adhesive bonding, and it is less likely to come loose after engagement. Compared to welding between the first base 213 and the second base 214, this method avoids the risk of incomplete welding. The third protrusion 2131 and the fourth protrusion 2141 will not suffer irreparable damage under stress, extending the service life of the rotating shaft mechanism 200 and facilitating future maintenance. Furthermore, the method of engaging the third protrusion 2131 and the fourth protrusion 2141 to achieve connection stability between the first base 213 and the second base 214 in the rotating shaft mechanism 200 provided in this embodiment can also serve as a reinforcement method implemented based on screw fastening, bonding, and / or welding, thereby further enhancing the connection stability in the thickness direction between the first base 213 and the second base 214.

[0099] Based on the above description, please refer to Figure 13 In some embodiments of this application, the inner wall of the first base 213 has a third inclined surface 2132, which extends from the third protrusion 2131 toward the opening of the second receiving groove 2133, and extends from the third protrusion 2131 toward the axis away from the base 210. The outer wall of the second base 214 has a fourth inclined surface 2142, which extends from the fourth protrusion 2141 away from the opening of the second receiving groove 2133, and extends from the fourth protrusion 2141 toward the axis of the base 210. The third inclined surface 2132 and the fourth inclined surface 2142 can be flat, curved, or irregular concave-convex surfaces, etc.

[0100] The third inclined surface 2132 and the fourth inclined surface 2142 are used for relative sliding to guide the third protrusion 2131 to engage with the fourth protrusion 2141. The second base 214 can be pressed forcefully into the first base 213, and the third inclined surface 2132 and the fourth inclined surface 2142 slide in cooperation. The engagement of the third protrusion 2131 and the fourth protrusion 2141 is achieved through the guidance of the third inclined surface 2132 and the fourth inclined surface 2142, as well as the deformation of the first base 213 and the second base 214. Alternatively, the first base 213 can be pressed forcefully against the second base 214, and the third inclined surface 2132 and the fourth inclined surface 2142 slide in cooperation. The engagement of the third protrusion 2131 and the fourth protrusion 2141 is achieved through the deformation of the third inclined surface 2132 and the fourth inclined surface 2142, as well as the deformation of the first base 213 and the second base 214. In this way, the assembly and fastening between the first base 213 and the second base 214 is convenient and easy to operate, which can save a lot of assembly time between the first base 213 and the second base 214.

[0101] Figure 16 This is a schematic diagram of the assembled structure of the shaft cover 220, the first base 213, and the second base 214 according to an embodiment of this application. (Refer to...) Figure 16 As shown, in the actual assembly process, the second base 214 can be used as the base, and the first base 213 is pressed against the second base 214 to make the third protrusion 2131 and the fourth protrusion 2141 engage, thereby fixing the first base 213 and the second base 214. Then, the shaft cover 220 is pressed against the first base 213 to make the first protrusion 221 and the second protrusion 211 engage, thereby fixing the shaft cover 220 against the first base 213. Finally, the mutual fixing between the shaft cover 220, the first base 213 and the second base 214 is achieved, completing the assembly and stacking of the rotating shaft mechanism 200 in the thickness direction.

[0102] Please continue to refer to this. Figure 13 As shown, in some embodiments of this application, the third protrusion 2131 is a third step surface 2131a perpendicular to the thickness direction of the first base 213, and the third step surface 2131a is connected to the third inclined surface 2132. The fourth protrusion 2141 is a fourth step surface 2141a perpendicular to the thickness direction of the second base 214, and the fourth step surface 2141a is connected to the fourth inclined surface 2142.

[0103] It is easy to understand that, since both the third step surface 2131a and the fourth step surface 2141a are perpendicular to the thickness direction of the rotating shaft mechanism 200, the connection stability between the base 210 and the shaft cover 220 in the thickness direction can be further improved after the third protrusion 2131 and the fourth protrusion 2141 are engaged. The third step surface 2131a is connected to the third inclined surface 2132, and the fourth step surface 2141a is connected to the fourth inclined surface 2142. Through the sliding cooperation of the third inclined surface 2132 and the fourth inclined surface 2142, the third step surface 2131a can be directly guided to engage with the fourth step surface 2141a, and the assembly method is simple and easy to implement.

[0104] It should be noted that in the rotating shaft mechanism 200 provided in this application embodiment, there can be multiple third protrusions 2131 and multiple fourth protrusions 2141. These multiple third protrusions 2131 and multiple fourth protrusions 2141 are arranged at intervals along the axial direction of the base 210, thereby ensuring the connection stability between the base 210 and the shaft cover 220. Alternatively, the third protrusion 2131 can extend from one end of the first base 213 to the other end of the first base 213 along the axial direction of the base 210, covering the entire length of the first base 213. Similarly, the fourth protrusion 2141 can extend from one end of the second base 214 to the other end of the second base 214 along the axial direction of the base 210, covering the entire length of the second base 214, thereby ensuring the connection stability between the base 210 and the shaft cover 220.

[0105] Figure 17 This is a cross-sectional schematic diagram of a portion of the structure of a rotating shaft mechanism 200 provided in an embodiment of this application, with reference to... Figure 17 and combined Figure 12 As shown, in some embodiments of this application, the rotating shaft mechanism 200 further includes a first fastener 240. A first mounting hole 2134 is formed along the thickness direction of the base 210 in the first base 213, and a second mounting hole 2143 is formed along the thickness direction of the base 210 in the second base 214. The first fastener 240 passes through the first mounting hole 2134 and the second mounting hole 2143 to lock the second base 214 onto the first base 213. By using the first fastener 240 in conjunction with the snap-fit ​​method of the third protrusion 2131 and the fourth protrusion 2141, a double fastening effect can be formed between the first base 213 and the second base 214, improving the connection stability between the first base 213 and the second base 214.

[0106] Of course, the second base 214 can also be connected to the first base 213 by means of bonding and / or welding, thereby forming multiple fastening effects between the first base 213 and the second base 214, and improving the connection stability between the first base 213 and the second base 214.

[0107] Please continue to refer to this. Figure 12 As shown in a simplified embodiment of this application, the pivot mechanism 200 further includes a second fastener 250. A mounting post 224 is provided on the shaft cover 220, and the mounting post 224 has a third mounting hole 2241. A fourth mounting hole 215 is provided on the base 210 along its thickness direction. The mounting post 224 passes through the fourth mounting hole 215, and the second fastener 250 is fitted into the third mounting hole 2241 to lock the base 210 to the shaft cover 220. By using the second fastener 250 in conjunction with the snap-fit ​​method of the first protrusion 221 and the second protrusion 211, a double fastening effect can be formed between the shaft cover 220 and the base 210, improving the connection stability between the shaft cover 220 and the base 210. Furthermore, the mounting post 224 is located on the inner side of the shaft cover 220, which helps to improve the aesthetic appearance of the foldable electronic device 100.

[0108] Of course, the base 210 can also be connected to the shaft cover 220 by means of adhesive bonding and / or welding, thereby forming multiple fastening effects between the base 210 and the shaft cover 220 and improving the connection stability between the base 210 and the shaft cover 220.

[0109] Please continue to refer to this. Figure 12 As shown, in some embodiments of this application, a guide post 225 may also be provided on the shaft cover 220, and a guide hole 216 is provided on the base 210, with the guide post 225 passing through the guide hole 216. It can be understood that the cooperation between the guide post 225 and the guide hole 216 facilitates the assembly between the base 210 and the shaft cover 220, and also provides a limiting function to prevent the base 210 from displacing relative to the shaft cover 220.

[0110] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0111] In the description of the embodiments of this application, the term "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, c can represent a, b, c, a and b, a and c, b and c, a and b and c, where a, b, and c can be a single item or a plurality of items.

[0112] In the description of embodiments of this application, "parallel," "perpendicular," "equal," and "coplanar" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximately parallelism, wherein the acceptable deviation range for approximately parallelism may be, for example, within ±10° or ±5°. "Perpendicular" includes absolute perpendicularity and approximately perpendicularity, wherein the acceptable deviation range for approximately perpendicularity may be, for example, within ±10° or ±5°; "equal" includes absolute equality and approximately equality, wherein the acceptable deviation range for approximately equality may be, for example, the difference between the two equals being less than or equal to 5% of either one. For example, an angle of 180° between two components includes both absolute 180° and approximate 180°, where an acceptable deviation range for approximate 180° could be, for example, within ±10° or ±5°; similarly, an angle of 0° between two components includes both absolute 0° and approximate 0°, where an acceptable deviation range for approximate 0° could be, for example, within ±10° or ±5°. Similarly, an angle of 90° between two components includes both absolute 90° and approximate 90°, where an acceptable deviation range for approximate 90° could be, for example, within ±10° or ±5°.

[0113] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0114] The directional terms used in the embodiments of this application, such as "inner" and "outer," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientation structure and operation. Therefore, they should not be construed as limitations on the embodiments of this application. Furthermore, unless otherwise stated in this application, "multiple" in this application refers to two or more.

[0115] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0116] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0117] The terms "first," "second," "third," "fourth," etc. (if present) in the claims, description, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0118] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotating shaft mechanism, characterized in that, include: Base; A swing arm is provided on both sides of the axial direction of the base. The swing arm is rotatably connected to the base so that the swing arm can switch between an unfolded state and a folded state relative to the base. The shaft cover has a first receiving groove, at least a portion of the base is located in the first receiving groove, the inner sidewalls of both sides of the shaft cover have a first protrusion, and the outer sidewalls of both sides of the base have a second protrusion, the first protrusion and the second protrusion are engaged.

2. The rotating shaft mechanism according to claim 1, characterized in that, The inner wall of the shaft cover has a first inclined surface, which extends from the first protrusion toward the opening of the first receiving groove, and extends from the first protrusion toward the axis away from the base. The outer wall of the base has a second inclined surface, which extends from the second protrusion away from the opening of the first receiving groove, and extends from the second protrusion toward the axis of the base. The first inclined surface and the second inclined surface are used to slide relative to each other to guide the first protrusion to engage with the second protrusion.

3. The rotating shaft mechanism according to claim 2, characterized in that, The first protrusion is a first stepped surface perpendicular to the thickness direction of the shaft cover, and the first stepped surface is connected to the first inclined surface; The second protrusion is a second stepped surface perpendicular to the thickness direction of the base, and the second stepped surface is connected to the second inclined surface.

4. The rotating shaft mechanism according to any one of claims 1-3, characterized in that, There are multiple first protrusions and multiple second protrusions, and the multiple first protrusions and multiple second protrusions are arranged at intervals along the axial direction of the base; Alternatively, the first protrusion extends from one end of the shaft cover to the other end of the shaft cover along the axial direction of the base, and the second protrusion extends from one end of the base to the other end of the base along the axial direction of the base.

5. The rotating shaft mechanism according to any one of claims 1-4, characterized in that, The base includes: a first base and a second base; The first base has a second receiving groove, at least a portion of the second base is located in the second receiving groove, and the second base is farther away from the shaft cover than the first base, and one end of the swing arm connected to the base is clamped between the first base and the second base; The first base has a third protrusion on its two inner sidewalls, and the second base has a fourth protrusion on its two outer sidewalls, and the third protrusion engages with the fourth protrusion.

6. The rotating shaft mechanism according to claim 5, characterized in that, The inner wall of the first base has a third inclined surface, which extends from the third protrusion toward the opening of the second receiving groove, and extends from the third protrusion toward the axis away from the base. The second base has a fourth inclined surface on its outer side wall. The fourth inclined surface extends from the fourth protrusion toward the opening of the second receiving groove, and extends from the fourth protrusion toward the axis of the base. The third inclined surface and the fourth inclined surface are used to slide relative to each other to guide the third protrusion to engage with the fourth protrusion.

7. The rotating shaft mechanism according to claim 6, characterized in that, The third protrusion is a third stepped surface perpendicular to the thickness direction of the first base, and the third stepped surface is connected to the third inclined surface; The fourth protrusion is a fourth stepped surface perpendicular to the thickness direction of the second base, and the fourth stepped surface is connected to the fourth inclined surface.

8. The rotating shaft mechanism according to any one of claims 5-7, characterized in that, There are multiple third protrusions and multiple fourth protrusions, and the multiple third protrusions and multiple fourth protrusions are arranged at intervals along the axial direction of the base. Alternatively, the third protrusion extends from one end of the first base to the other end of the first base along the axial direction of the base, and the fourth protrusion extends from one end of the second base to the other end of the second base along the axial direction of the base.

9. The rotating shaft mechanism according to any one of claims 5-8, characterized in that, Also includes: First fastener; The first base has a first mounting hole along the thickness direction of the base, and the second base has a second mounting hole along the thickness direction of the base. The first fastener passes through the first mounting hole and the second mounting hole to lock the second base to the first base.

10. The rotating shaft mechanism according to any one of claims 5-9, characterized in that, The second base is connected to the first base by adhesive and / or welding.

11. The rotating shaft mechanism according to any one of claims 1-10, characterized in that, Also includes: Second fastener; The shaft cover is provided with an assembly post, the assembly post has a third assembly hole, the base has a fourth assembly hole along the thickness direction of the base, the assembly post passes through the fourth assembly hole, and the second fastener is assembled in the third assembly hole to lock the base to the shaft cover.

12. The rotating shaft mechanism according to any one of claims 1-11, characterized in that, The base is connected to the shaft cover by adhesive bonding and / or welding.

13. The rotating shaft mechanism according to any one of claims 1-12, characterized in that, The shaft cover is provided with a guide post, and the base is provided with a guide hole, through which the guide post passes.

14. A foldable electronic device, characterized in that, include: The flexible screen, at least two main body parts, and at least one rotating shaft mechanism as described in any one of claims 1-13; Two adjacent main body parts are respectively connected to both sides of the axial direction of the base of the rotating shaft mechanism, and the two adjacent main body parts can be relatively unfolded and folded through the rotating shaft mechanism; The flexible screen is attached to one side of at least two of the main body parts and at least one of the rotating shaft mechanisms.

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