Main shaft, folding mechanism, and electronic device

Abstract

A main shaft (1), a folding mechanism (100), and an electronic device (1000). The main shaft is an integrally formed structural member, and the main shaft comprises a main shaft body (11), a first protrusion (12) and a second protrusion (13); the main shaft body is provided with an inner space (110), the inner space comprises a bottom wall (1101) and a first side wall (1102) and a second side wall (1103) arranged opposite to each other, and the bottom wall comprises a first arc surface (117); the first protrusion protrudes from the first side wall and is spaced apart from the bottom wall, and the surface of the first protrusion facing the bottom surface of the main shaft body comprises a second arc surface (121); the second protrusion protrudes from the second side wall and is spaced apart from the bottom wall, and the surface of the second protrusion facing the bottom surface of the main shaft body comprises a third arc surface (131); and the second arc surface of the main shaft, the first arc surface of the main shaft and the third arc surface of the main shaft are sequentially spaced apart in a first direction, and in a second direction, there is a height difference between the second arc surface of the main shaft and the first arc surface of the main shaft, and there is a height difference between the third arc surface of the main shaft and the first arc surface of the main shaft. The main shaft has a simple structure, involves low costs, and enables a thin design.

Description

Main shaft, folding mechanism and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411348696.7, filed on September 25, 2024, entitled "Main shaft, folding mechanism and electronic device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of foldable electronic products, in particular to a main shaft, a folding mechanism and an electronic device. BACKGROUND

[0003] With the development of technology and the demand of electronic device market, foldable electronic devices are more and more widely used. The folding mechanism of the traditional foldable electronic device includes a main shaft and a plurality of connecting pieces. The main shaft is movably connected to two housings through the plurality of connecting pieces. However, the traditional main shaft is formed by a plurality of structural pieces through screw locking or other fixing methods. In this way, on the one hand, the number of constituent structures of the main shaft is large, the structure is complex, and the cost is high. On the other hand, the thickness of the main shaft is thick due to the stacking of the plurality of structural pieces in the thickness direction, which is not conducive to the thin design of the main shaft. SUMMARY

[0004] The present application provides a main shaft, a folding mechanism and an electronic device with simple structure, low cost and thin design.

[0005] In a first aspect, the present application provides a main shaft. The main shaft is an integrally formed structural piece, which includes a main shaft body, a first protrusion and a second protrusion. The main shaft body includes a top surface and a bottom surface arranged oppositely, and is provided with an inner space. The inner space forms an opening at the top surface of the main shaft body, and includes a bottom wall and first and second side walls arranged oppositely. The bottom wall connects the first and second side walls.

[0006] The bottom wall includes a first curved surface. The first protrusion is protruded from the first side wall and is spaced apart from the bottom wall. The surface of the first protrusion facing the bottom surface of the main shaft body includes a second curved surface. The second protrusion is protruded from the second side wall and is spaced apart from the bottom wall. The surface of the second protrusion facing the bottom surface of the main shaft body includes a third curved surface.

[0007] The second curved surface of the main shaft, the first curved surface of the main shaft and the third curved surface of the main shaft are sequentially and spaced apart in a first direction. In a second direction different from the first direction, the second curved surface of the main shaft and the first curved surface of the main shaft have a height difference, and the third curved surface of the main shaft and the first curved surface of the main shaft have a height difference.

[0008] It can be understood that, compared with the scheme of the main shaft formed by fixing a plurality of structural members through screw locking or the like, the main shaft of the embodiment is a one-piece structural member. On the one hand, the number of constituent structures of the main shaft is small, and the structure is relatively simple; on the other hand, the process of screw locking or the like can be omitted, thereby simplifying the process steps of forming the main shaft and reducing the cost investment; and on the other hand, the connecting member such as a screw can be omitted, thereby omitting the thickness of the connecting member such as the screw in the thickness direction of the main shaft, and thus facilitating the thin design of the folding mechanism and the electronic device.

[0009] Exemplarily, the main shaft can be formed by an insert molding process. For example, plastic is first injected into a mold. After the plastic is cured, the mold is taken out. In this way, the main shaft is prepared.

[0010] It can be understood that, by arranging the second arc surface of the main shaft, the first arc surface of the main shaft and the third arc surface of the main shaft to be spaced apart along the first direction, and in the second direction, the second arc surface of the main shaft and the first arc surface of the main shaft have a height difference, and the third arc surface of the main shaft and the first arc surface of the main shaft have a height difference, the second arc surface of the main shaft, the first arc surface of the main shaft and the third arc surface of the main shaft are used to facilitate the formation of the arc-shaped groove structure of the main shaft. The arc-shaped groove structure of the main shaft can be used to form a rotating connection structure with the arc-shaped block of other structural members (for example, the first connecting member).

[0011] It can be understood that, compared with the scheme in which the two arc surfaces of the arc-shaped groove are arranged opposite to each other along the second direction, the second arc surface of the main shaft, the first arc surface of the main shaft and the third arc surface of the main shaft are arranged to be spaced apart along the first direction in the embodiment. On the one hand, during the preparation of the arc-shaped groove of the main shaft, the second arc surface of the main shaft, the first arc surface of the main shaft and the third arc surface of the main shaft do not interfere with each other, thereby making the preparation process of the arc-shaped groove of the main shaft simpler; on the other hand, the distance between the second arc surface of the main shaft and the first arc surface of the main shaft in the second direction and the distance between the third arc surface of the main shaft and the first arc surface of the main shaft in the second direction can be greatly reduced, thereby facilitating the thin design of the main shaft.

[0012] It can be understood that, when the main shaft is applied to the folding mechanism, in the closed state of the folding mechanism, the accommodation space for accommodating the flexible screen includes the inner space of the main shaft, so that the accommodation space can be greatly increased. In this way, when the second display area of the flexible screen is located in the accommodation space, the free deformation space of the second display area of the flexible screen is released, and the bending degree of the second display area of the flexible screen can be smaller. At this time, the second display area of the flexible screen is not easy to be damaged, and the reliability of the flexible screen is better. In particular, when the electronic device is in an irregular environment such as falling or impact, the folding mechanism is not easy to squeeze the flexible screen, and the flexible screen is not easy to fail.

[0013] In a possible implementation, the main shaft body is provided with a first through hole, the first through hole forms an opening at the bottom surface and the bottom wall of the main shaft body, and at least part of the first through hole is arranged opposite to the second curved surface of the main shaft.

[0014] It can be understood that, by providing the first through hole in the main shaft body, the first through hole forms an opening at the bottom surface and the bottom wall of the main shaft body, and at least part of the first through hole is arranged opposite to the second curved surface of the main shaft, so that after the second curved surface of the main shaft is formed, the mold can be taken out along the second direction and through the first through hole. In other words, the first through hole can facilitate the taking out of the mold after the second curved surface of the main shaft is formed. The mold taking-out mode of the main shaft in this embodiment is relatively simple.

[0015] In a possible implementation, the main shaft body is provided with a second through hole, the second through hole forms an opening at the bottom surface and the bottom wall of the main shaft body, and at least part of the second through hole is arranged opposite to the third curved surface of the main shaft.

[0016] It can be understood that, by providing the second through hole in the main shaft body, the second through hole forms an opening at the bottom surface and the bottom wall of the main shaft body, and at least part of the second through hole is arranged opposite to the third curved surface of the main shaft, so that after the third curved surface of the main shaft is formed, the mold can be taken out along the second direction and through the second through hole. In other words, the second through hole can facilitate the taking out of the mold after the third curved surface of the main shaft is formed. The mold taking-out mode of the main shaft in this embodiment is relatively simple.

[0017] In a possible implementation, the main shaft comprises a first reinforcing block, the first reinforcing block is located in the first through hole and is fixedly connected to the hole wall of the first through hole, and at least part of the first reinforcing block is arranged opposite to the second curved surface of the main shaft. In this way, the first reinforcing block can greatly improve the structural strength of the main shaft, so as to solve the problem of reduced structural strength caused by the first through hole, and further greatly improve the reliability of the main shaft.

[0018] In a possible implementation, the main shaft comprises a second reinforcing block, the second reinforcing block is located in the second through hole and is fixedly connected to the hole wall of the second through hole, and at least part of the second reinforcing block is arranged opposite to the third curved surface of the main shaft. In this way, the second reinforcing block can greatly improve the structural strength of the main shaft, so as to solve the problem of reduced structural strength caused by the second through hole, and further greatly improve the reliability of the main shaft.

[0019] In a possible implementation, the first reinforcing block comprises a first mold taking-out surface, the first mold taking-out surface is arranged opposite to the second curved surface of the main shaft, the first mold taking-out surface is arranged at an acute angle with the bottom surface of the main shaft, and the first mold taking-out surface and the bottom surface of the main shaft are closer to each other in a direction away from the central axis of the main shaft.

[0020] It can be understood that, by setting the first ejection surface and the bottom surface of the main shaft to be at an acute angle, and the first ejection surface and the bottom surface of the main shaft to be close to each other in a direction away from the central axis of the main shaft, after the second curved surface of the main shaft is formed, the mold can be taken out along a direction parallel to the first ejection surface and through the first through hole. Therefore, the present embodiment can adopt a side inclined slide block ejection mode. The main shaft of the present embodiment does not need to avoid the slide block in a large area, and the strength of the main shaft can be guaranteed. In other words, while the first reinforcing block is arranged to improve the structural strength of the main shaft, it can also be ensured that after the second curved surface of the main shaft is formed, the mold can be conveniently taken out.

[0021] In a possible implementation, the first ejection surface is arranged parallel to the bottom surface of the main shaft.

[0022] It can be understood that, compared with the scheme that the first ejection surface and the bottom surface of the main shaft are at an acute angle, by arranging the first ejection surface parallel to the bottom surface of the main shaft, on the one hand, the volume of the first reinforcing block as a whole can be larger, thereby further reducing the large-area avoidance of the slide block, and further guaranteeing the strength of the main shaft; on the other hand, after the second curved surface of the main shaft is formed, the mold can be taken out along a direction parallel to the first ejection surface and through the first through hole. Therefore, the present embodiment can adopt a horizontal slide block ejection mode. The ejection mode of the present embodiment is relatively simple, and the mold can be conveniently taken out.

[0023] In a possible implementation, the second reinforcing block includes a second ejection surface, the second ejection surface is arranged opposite to the third curved surface of the main shaft, the second ejection surface and the bottom surface of the main shaft are at an acute angle, and the second ejection surface and the bottom surface of the main shaft are close to each other in a direction away from the central axis of the main shaft.

[0024] It can be understood that, by setting the second ejection surface and the bottom surface of the main shaft to be at an acute angle, and the second ejection surface and the bottom surface of the main shaft to be close to each other in a direction away from the central axis of the main shaft, after the third curved surface of the main shaft is formed, the mold can be taken out along a direction parallel to the second ejection surface and through the second through hole. Therefore, the present embodiment can adopt a side inclined slide block ejection mode. The main shaft of the present embodiment does not need to avoid the slide block in a large area, and the strength of the main shaft can be guaranteed. In other words, while the second reinforcing block is arranged to improve the structural strength of the main shaft, it can also be ensured that after the third curved surface of the main shaft is formed, the mold can be conveniently taken out.

[0025] In a possible implementation, the second ejection surface is arranged parallel to the bottom surface of the main shaft.

[0026] It can be understood that, compared with the scheme that the second mold surface is arranged at an acute angle with the bottom surface of the main shaft, the second mold surface is arranged parallel to the bottom surface of the main shaft in the embodiment, which can make the overall volume of the second reinforcing block larger, thereby further reducing the large-area avoiding sliding block, and further guaranteeing the strength of the main shaft. On the other hand, after the third arc surface of the main shaft is formed, the mold can be removed along a direction parallel to the second mold surface and through the second through hole. Therefore, the horizontal sliding block mold removal mode can be adopted in the embodiment. The mold removal mode of the embodiment is relatively simple, and the mold can be conveniently taken out.

[0027] In a possible implementation, the axis of the second arc surface of the main shaft, the axis of the first arc surface of the main shaft, and the axis of the third arc surface of the main shaft are on the same straight line.

[0028] It can be understood that, by arranging the axis of the second arc surface of the main shaft, the axis of the first arc surface of the main shaft, and the axis of the third arc surface of the main shaft on the same straight line, the arc-shaped groove structure of the main shaft can form a rotating connection structure with the arc-shaped block of a connecting piece (for example, the first connecting piece) in the cooperation of the second arc surface of the main shaft, the first arc surface of the main shaft, and the third arc surface of the main shaft.

[0029] In a possible implementation, the inner space further includes oppositely arranged third and fourth side walls, and the bottom wall connects the third and fourth side walls, and the third and fourth side walls are arranged at intervals from the first and second side walls.

[0030] The bottom wall further includes a fourth arc surface, and the fourth arc surface of the main shaft is arranged at an interval from the first arc surface of the main shaft.

[0031] The main shaft further includes a third protrusion and a fourth protrusion; the third protrusion is protruded on the third side wall and arranged at an interval from the bottom wall, and the surface of the third protrusion facing the bottom surface of the main shaft body includes a fifth arc surface; the fourth protrusion is protruded on the fourth side wall and arranged at an interval from the bottom wall, and the surface of the fourth protrusion facing the bottom surface of the main shaft body includes a sixth arc surface.

[0032] The fifth arc surface of the main shaft, the fourth arc surface of the main shaft, and the sixth arc surface of the main shaft are arranged at intervals in the first direction, and in the second direction, the fifth arc surface of the main shaft and the fourth arc surface of the main shaft have a height difference, and the sixth arc surface of the main shaft and the fourth arc surface of the main shaft have a height difference.

[0033] It can be understood that, by arranging the fifth arc surface of the main shaft, the fourth arc surface of the main shaft and the sixth arc surface of the main shaft to be sequentially and spaced apart along the first direction, and in the second direction, the fifth arc surface of the main shaft and the fourth arc surface of the main shaft have a height difference, and the sixth arc surface of the main shaft and the fourth arc surface of the main shaft have a height difference, the fifth arc surface of the main shaft, the fourth arc surface of the main shaft and the sixth arc surface of the main shaft are matched to facilitate the formation of the arc-shaped groove structure of the main shaft. The arc-shaped groove structure of the main shaft can be used to form a rotating connection structure with the arc-shaped blocks of other structural members (for example, the second connecting member).

[0034] It can be understood that, compared with the scheme in which the two arc surfaces of the arc-shaped groove are arranged opposite to each other along the second direction, in the embodiment, the fifth arc surface of the main shaft, the fourth arc surface of the main shaft and the sixth arc surface of the main shaft are sequentially and spaced apart along the first direction. On the one hand, in the process of manufacturing the arc-shaped groove of the main shaft, the fifth arc surface of the main shaft, the fourth arc surface of the main shaft and the sixth arc surface of the main shaft do not interfere with each other, so that the manufacturing process of the arc-shaped groove of the main shaft is simpler. On the other hand, the distance between the fifth arc surface of the main shaft and the fourth arc surface of the main shaft in the second direction and the distance between the sixth arc surface of the main shaft and the fourth arc surface of the main shaft in the second direction can be greatly reduced, thereby facilitating the thin type arrangement of the main shaft.

[0035] In a possible implementation manner, the fourth arc surface of the main shaft and the first arc surface of the main shaft are arranged along a third direction, and the third direction is different from the first direction and the second direction. In this way, the fourth arc surface of the main shaft and the first arc surface of the main shaft are arranged more compactly.

[0036] And / or, the fifth arc surface of the main shaft and the second arc surface of the main shaft are arranged along a third direction, and the third direction is different from the first direction and the second direction. In this way, the fifth arc surface of the main shaft and the second arc surface of the main shaft are arranged more compactly.

[0037] And / or, the sixth arc surface of the main shaft and the third arc surface of the main shaft are arranged along a third direction, and the third direction is different from the first direction and the second direction. In this way, the sixth arc surface of the main shaft and the third arc surface of the main shaft are arranged more compactly.

[0038] In a possible implementation manner, the fourth arc surface of the main shaft and the first arc surface of the main shaft are a mirror-symmetrical structure. In this way, the symmetry of the main shaft is improved. And / or, the fifth arc surface of the main shaft and the second arc surface of the main shaft are a mirror-symmetrical structure. In this way, the symmetry of the main shaft is improved. And / or, the sixth arc surface of the main shaft and the third arc surface of the main shaft are a mirror-symmetrical structure. In this way, the symmetry of the main shaft is improved.

[0039] In a possible implementation manner, the axis of the fifth arc surface of the main shaft, the axis of the fourth arc surface of the main shaft and the axis of the sixth arc surface of the main shaft are on the same straight line.

[0040] It can be understood that, by setting the axis of the fifth arc surface of the main shaft, the axis of the fourth arc surface of the main shaft and the axis of the sixth arc surface of the main shaft on the same straight line, the arc-shaped groove structure of the main shaft can form a rotating connection structure with the arc-shaped block of a connecting piece (for example, the second connecting piece) in the cooperation of the fifth arc surface of the main shaft, the fourth arc surface of the main shaft and the sixth arc surface of the main shaft.

[0041] In a possible implementation, the main shaft body is provided with a third through hole, the third through hole forms an opening at the bottom surface of the main shaft body and the bottom wall, and at least part of the third through hole is arranged opposite to the fifth arc surface of the main shaft.

[0042] It can be understood that, by setting the third through hole in the main shaft body, the third through hole forms an opening at the bottom surface of the main shaft body and the bottom wall, and at least part of the third through hole is arranged opposite to the fifth arc surface of the main shaft, so that after the fifth arc surface of the main shaft is formed, the mold can be taken out along the second direction and through the third through hole. In other words, the third through hole can facilitate the taking out of the mold after the fifth arc surface of the main shaft is formed. The mold taking-out mode of the main shaft of the present embodiment is relatively simple.

[0043] In a possible implementation, the main shaft body is provided with a fourth through hole, the fourth through hole forms an opening at the bottom surface of the main shaft body and the bottom wall of the inner space, and at least part of the fourth through hole is arranged opposite to the sixth arc surface of the main shaft.

[0044] It can be understood that, by setting the fourth through hole in the main shaft body, the fourth through hole forms an opening at the bottom surface of the main shaft body and the bottom wall of the inner space, and at least part of the fourth through hole is arranged opposite to the sixth arc surface of the main shaft, so that after the sixth arc surface of the main shaft is formed, the mold can be taken out along the second direction and through the fourth through hole. In other words, the fourth through hole can facilitate the taking out of the mold after the sixth arc surface of the main shaft is formed. The mold taking-out mode of the main shaft of the present embodiment is relatively simple.

[0045] In a possible implementation, the main shaft further includes a third reinforcing block, the third reinforcing block is located in the third through hole and is fixedly connected to the hole wall of the third through hole, and at least part of the third reinforcing block is arranged opposite to the fifth arc surface of the main shaft. In this way, the third reinforcing block can greatly improve the structural strength of the main shaft to solve the problem of reduced structural strength caused by the third through hole, thereby greatly improving the reliability of the main shaft.

[0046] And / or, the main shaft further includes a fourth reinforcing block, the fourth reinforcing block is located in the fourth through hole and is fixedly connected to the hole wall of the fourth through hole, and at least part of the fourth reinforcing block is arranged opposite to the sixth arc surface of the main shaft. In this way, the fourth reinforcing block can greatly improve the structural strength of the main shaft to solve the problem of reduced structural strength caused by the fourth through hole, thereby greatly improving the reliability of the main shaft.

[0047] In a possible implementation, the third reinforcing block comprises a third ejection surface, the third ejection surface is arranged opposite to the fifth curved surface of the main shaft, the third ejection surface is arranged at an acute angle with the bottom surface of the main shaft, and the third ejection surface and the bottom surface of the main shaft are close to each other in a direction away from the central axis of the main shaft.

[0048] It can be understood that, by arranging the third ejection surface at an acute angle with the bottom surface of the main shaft and arranging the third ejection surface and the bottom surface of the main shaft to be close to each other in a direction away from the central axis of the main shaft, the mold can be ejected along a direction parallel to the third ejection surface and through the third through hole after the fifth curved surface of the main shaft is formed. Therefore, the present embodiment can adopt a side inclined slide block ejection mode. The main shaft of the present embodiment does not need to avoid the slide block in a large area, and the strength of the main shaft can be ensured. In other words, the present embodiment can ensure that the mold can be conveniently taken out after the fifth curved surface of the main shaft is formed, while the third reinforcing block is arranged to improve the structural strength of the main shaft.

[0049] In a possible implementation, the third ejection surface is arranged parallel to the bottom surface of the main shaft.

[0050] It can be understood that, compared with the scheme that the third ejection surface is arranged at an acute angle with the bottom surface of the main shaft, by arranging the third ejection surface parallel to the bottom surface of the main shaft, on the one hand, the overall volume of the third reinforcing block can be larger, so as to further reduce the large-area avoidance of the slide block, and further ensure the strength of the main shaft; on the other hand, the mold can be ejected along a direction parallel to the third ejection surface and through the third through hole after the fifth curved surface of the main shaft is formed. Therefore, the present embodiment can adopt a horizontal slide block ejection mode. The ejection mode of the present embodiment is relatively simple, and the mold can be conveniently taken out.

[0051] In a possible implementation, the fourth reinforcing block comprises a fourth ejection surface, the fourth ejection surface is arranged opposite to the sixth curved surface of the main shaft, the fourth ejection surface is arranged at an acute angle with the bottom surface of the main shaft, and the fourth ejection surface and the bottom surface of the main shaft are close to each other in a direction away from the central axis of the main shaft.

[0052] It can be understood that, by arranging the fourth ejection surface at an acute angle with the bottom surface of the main shaft and arranging the fourth ejection surface and the bottom surface of the main shaft to be close to each other in a direction away from the central axis of the main shaft, the mold can be ejected along a direction parallel to the fourth ejection surface and through the fourth through hole after the sixth curved surface of the main shaft is formed. Therefore, the present embodiment can adopt a side inclined slide block ejection mode. The main shaft of the present embodiment does not need to avoid the slide block in a large area, and the strength of the main shaft can be ensured. In other words, the present embodiment can ensure that the mold can be conveniently taken out after the sixth curved surface of the main shaft is formed, while the fourth reinforcing block is arranged to improve the structural strength of the main shaft.

[0053] In a possible implementation, the fourth die face is arranged parallel to the bottom surface of the main shaft.

[0054] It can be understood that, compared with the scheme that the fourth die face is arranged at an acute angle to the bottom surface of the main shaft, the fourth die face is arranged parallel to the bottom surface of the main shaft in the embodiment, which can make the overall volume of the fourth reinforcing block larger, thereby further reducing the large-area avoidance slider, and further guaranteeing the strength of the main shaft. On the other hand, after the sixth arc surface of the main shaft is formed, the mold can be removed along the direction parallel to the fourth die face and through the fourth through hole. Therefore, the horizontal slider ejection mode can be used in the embodiment. The ejection mode of the embodiment is relatively simple, and the mold can be conveniently taken out.

[0055] In a possible implementation, the first direction is the length direction of the main shaft, and the second direction is the thickness direction of the main shaft.

[0056] In a second aspect, the application provides a folding mechanism. The folding mechanism comprises a first connecting piece and the main shaft as above.

[0057] The first connecting piece comprises a first rotating end, the first rotating end of the first connecting piece comprises a first body part, a first protruding part and a second protruding part, the first body part of the first rotating end of the first connecting piece comprises oppositely arranged top and bottom surfaces and oppositely arranged first and second side surfaces, and the first and second side surfaces of the first body part of the first rotating end of the first connecting piece are connected between the top and bottom surfaces of the first body part of the first rotating end of the first connecting piece.

[0058] The bottom surface of the first body part of the first rotating end of the first connecting piece comprises a first arc surface.

[0059] The first protruding part of the first rotating end of the first connecting piece protrudes from the first side surface of the first body part of the first rotating end of the first connecting piece, the first protruding part of the first rotating end of the first connecting piece comprises a second arc surface, and the second arc surface of the first connecting piece and the top surface of the first body part of the first rotating end of the first connecting piece are directed to the same side.

[0060] The second protruding part of the first rotating end of the first connecting piece protrudes from the second side surface of the first body part of the first rotating end of the first connecting piece, the second protruding part of the first rotating end of the first connecting piece comprises a third arc surface, and the third arc surface of the first rotating end of the first connecting piece and the top surface of the first body part of the first rotating end of the first connecting piece are directed to the same side.

[0061] The first body part of the first rotating end of the first connecting member is located in the inner space of the main shaft and between the first protrusion and the second protrusion of the main shaft, a part of the first protruding part of the first rotating end of the first connecting member is located between the first protrusion of the main shaft and the main shaft body, and a part of the second protruding part of the first rotating end of the first connecting member is located between the second protrusion of the main shaft and the main shaft body.

[0062] The first arc surface of the first rotating end of the first connecting member is in contact with the first arc surface of the main shaft and can move relative to each other, the second arc surface of the first rotating end of the first connecting member is in contact with the second arc surface of the main shaft and can move relative to each other, and the third arc surface of the first rotating end of the first connecting member is in contact with the third arc surface of the main shaft and can move relative to each other.

[0063] It can be understood that the first rotating end of the first connecting member and the main shaft can be connected in rotation through the cooperation of the first arc surface of the first rotating end of the first connecting member and the first arc surface of the main shaft, the cooperation of the second arc surface of the first rotating end of the first connecting member and the second arc surface of the main shaft, and the cooperation of the third arc surface of the first rotating end of the first connecting member and the third arc surface of the main shaft, that is, the first rotating end of the first connecting member and the main shaft can be connected in rotation through the virtual shaft. The structure connected in rotation through the virtual shaft is simple, occupies small space, and is beneficial to reducing the thickness of the folding mechanism, so that the folding mechanism and the electronic device are more easily realized thin and light.

[0064] In addition, since the main shaft can be realized simple structure, less cost investment and thin type setting, when the main shaft is applied to the folding mechanism, the folding mechanism is also beneficial to realize simple structure, less cost investment and thin type setting.

[0065] In a possible implementation, the folding mechanism further includes a first fixed frame, and the first connecting member includes a first movable end, and the first movable end of the first connecting member is movably connected to the first fixed frame.

[0066] In a possible implementation, the folding mechanism further includes a first fixed frame, and the first connecting member includes a first movable end, and the first movable end of the first connecting member is movably connected to the first fixed frame.

[0067] It can be understood that since the folding mechanism can be realized simple structure, less cost investment and thin type setting, the electronic device can be realized simple structure, less cost investment and thin type setting.

[0068] In a possible implementation, the electronic device includes a flexible screen, the flexible screen includes a first display area, a second display area and a third display area connected in sequence, the first display area is fixed on the first shell, and the third display area is fixed on the second shell.

[0069] It can be understood that, when the electronic device is in the closed state, since the accommodation space for accommodating the flexible screen includes the inner side space of the main shaft, the accommodation space can be increased to a large extent. In this way, when the second display area of the flexible screen is located in the accommodation space, the free deformation space of the second display area of the flexible screen is released, and the bending degree of the second display area of the flexible screen can be small. At this time, the second display area of the flexible screen is not easy to be damaged, and the reliability of the flexible screen is better. In particular, when the electronic device is in an irregular environment such as falling or impact, the folding mechanism is not easy to press the flexible screen, and the flexible screen is not easy to fail. BRIEF DESCRIPTION OF DRAWINGS

[0070] FIG. 1 is a structural schematic diagram of an electronic device in a flat state according to an embodiment of the present application;

[0071] FIG. 2 is a partial cross-sectional view of the electronic device shown in FIG. 1 at A-A line according to an embodiment;

[0072] FIG. 3 is a structural schematic diagram of the electronic device shown in FIG. 1 in a closed state according to an embodiment;

[0073] FIG. 4 is a partial cross-sectional view of the electronic device shown in FIG. 3 at B-B line according to an embodiment;

[0074] FIG. 5 is a partial exploded view of an embodiment of the electronic device shown in FIG. 1;

[0075] FIG. 6 is a partial exploded view of the folding mechanism, the first shell and the second shell according to an embodiment;

[0076] FIG. 7 is a partial exploded view of an embodiment of the folding mechanism shown in FIG. 6;

[0077] FIG. 8 is an enlarged view of the main shaft shown in FIG. 7 at M1 according to an embodiment;

[0078] FIG. 9 is a structural schematic diagram of the main shaft shown in FIG. 7 from another angle;

[0079] FIG. 10 is a structural schematic diagram of the main shaft shown in FIG. 7 from still another angle;

[0080] FIG. 11 is a partial cross-sectional view of the main shaft shown in FIG. 9 at C-C line according to an embodiment;

[0081] FIG. 12 is a partial cross-sectional view of the main shaft shown in FIG. 8 at D-D line according to an embodiment;

[0082] Fig. 13 is a structural schematic view of an embodiment of the first and second connectors shown in Fig. 7;

[0083] Fig. 14 is a structural schematic view of the first and second connectors shown in Fig. 13 from another angle;

[0084] Fig. 15 is a structural schematic view of the first and second connectors shown in Fig. 13 from still another angle;

[0085] Fig. 16 is a partially exploded schematic view of an embodiment of the folding mechanism shown in Fig. 6;

[0086] Fig. 17 is a partially cross-sectional view of an embodiment of the partially folding mechanism shown in Fig. 16 at line E-E;

[0087] Fig. 18 is a partially cross-sectional view of an embodiment of the partially folding mechanism shown in Fig. 16 at line F-F;

[0088] Fig. 19 is a partially cross-sectional view of an embodiment of the partially folding mechanism shown in Fig. 16 at line G-G;

[0089] Fig. 20 is a cross-sectional schematic view of the partially folding mechanism shown in Fig. 18 in a closed state;

[0090] Fig. 21 is a structural schematic view of an embodiment of the first and second holders shown in Fig. 7;

[0091] Fig. 22 is a partially exploded schematic view of an embodiment of the folding mechanism shown in Fig. 6;

[0092] Fig. 23 is a partially exploded schematic view of an embodiment of the folding mechanism shown in Fig. 6;

[0093] Fig. 24 is a partially cross-sectional view of an embodiment of the partially folding mechanism shown in Fig. 23 at line H-H;

[0094] Fig. 25 is a partially cross-sectional view of an embodiment of the electronic device shown in Fig. 5 at line I-I;

[0095] Fig. 26 is an enlarged schematic view of an embodiment of the electronic device shown in Fig. 4 at M2;

[0096] Fig. 27 is a structural schematic view of another embodiment of the main shaft shown in Fig. 7;

[0097] Fig. 28 is a structural schematic view of the main shaft shown in Fig. 27 from another angle;

[0098] Fig. 29 is a structural schematic view of the main shaft shown in Fig. 27 from still another angle;

[0099] Fig. 30 is a partial cross-sectional view of an embodiment of the main shaft shown in Fig. 27 at line J1-J1;

[0100] Fig. 31 is a partial cross-sectional view of an embodiment of the main shaft shown in Fig. 28 at line J2-J2;

[0101] Fig. 32 is an assembly view of an embodiment of the main shaft, the first connecting member, and the second connecting member shown in Fig. 27;

[0102] Fig. 33 is a partial cross-sectional view of an embodiment of the partial folding mechanism shown in Fig. 32 at line J3-J3;

[0103] Fig. 34 is a partial cross-sectional view of the partial folding mechanism shown in Fig. 33 in a closed state;

[0104] Fig. 35 is a structural view of another embodiment of the main shaft shown in Fig. 7;

[0105] Fig. 36 is a structural view of the main shaft shown in Fig. 35 at another angle;

[0106] Fig. 37 is a partial cross-sectional view of an embodiment of the main shaft shown in Fig. 35 at line K-K;

[0107] Fig. 38 is an assembly view of an embodiment of the main shaft, the first connecting member, and the second connecting member shown in Fig. 35;

[0108] Fig. 39 is a partial cross-sectional view of an embodiment of the partial folding mechanism shown in Fig. 38 at line L-L;

[0109] Fig. 40 is a partial cross-sectional view of the partial folding mechanism shown in Fig. 39 in a closed state. DETAILED DESCRIPTION

[0110] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application.

[0111] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection", "joint" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium; can be electrical connection, or can be mechanical connection. Among them, "fixed connection" refers to the relative position relationship after being connected with each other. "Rotary connection" refers to the relative rotation after being connected with each other. "Sliding connection" refers to the relative sliding after being connected with each other. "Movable connection" refers to the relative movement after being connected with each other. In addition, the two components are integrated by the one-piece forming process (i.e. the one-piece structure) refers to the process of forming one of the two components, the component is connected with the other component, and the two components do not need to be connected together by reprocessing (such as bonding, welding, buckling connection, screw connection) method. Component A and component B are relatively arranged, component A is projected to obtain projection C along the target direction, component B is projected to obtain projection D along the target direction, and projection C and projection D can at least mostly overlap. In some embodiments, the mostly overlap can be any of the following cases: projection C is completely located in projection D. Or, projection D is completely located in projection C. Or, projection C and projection D intersect with each other, and the intersection area of projection C and projection D accounts for more than 50% of projection C or projection D.

[0112] The orientation terms mentioned in the embodiments of the present application, such as "top", "bottom", "inner", "outer" and the like, are only the directions of the drawings, therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0113] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship. "Multiple" means at least two.

[0114] In addition, in the embodiments of the present application, the mathematical concepts of symmetry, equality, parallel, perpendicular, etc. are mentioned. These definitions are for the current process level, not the absolute strict definition in the mathematical sense, and a small amount of deviation is allowed, such as approximate symmetry, approximate equality, approximate 45°, approximate parallel, approximate perpendicular, etc. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees.

[0115] FIG. 1 is a structural schematic diagram of an electronic device 1000 in a flat state according to an embodiment of the present application. FIG. 2 is a partial cross-sectional view of the electronic device 1000 shown in FIG. 1 along line A-A according to an embodiment of the present application. FIG. 3 is a structural schematic diagram of the electronic device 1000 shown in FIG. 1 in a closed state according to an embodiment of the present application. FIG. 4 is a partial cross-sectional view of the electronic device 1000 shown in FIG. 3 along line B-B according to an embodiment of the present application.

[0116] As shown in FIGS. 1 to 4, the present application provides a foldable electronic device 1000. The foldable electronic device 1000 can be a mobile phone, a tablet computer, a personal computer, a notebook computer, a vehicle-mounted device, or a wearable device (such as a smart bracelet), etc. The present application will be described in detail taking the electronic device 1000 as a mobile phone.

[0117] For ease of description, the thickness direction of the electronic device 1000 is defined as the Z-axis direction, and the extension direction of the rotation axis of the electronic device 1000 is defined as the Y-axis direction. The direction perpendicular to the Y-axis direction and the Z-axis direction is defined as the X-axis direction. It can be understood that the coordinate system of the electronic device 1000 can also be flexibly set according to specific needs.

[0118] It can be understood that in the present embodiment, the direction of the rotation axis of the electronic device 1000 is the Y-axis direction, that is, the electronic device 1000 can be relatively unfolded or folded along the Y-axis direction. In this way, when the electronic device 1000 is in a closed state, the size of the electronic device 1000 in the X-axis direction becomes smaller. The present embodiment is described taking the direction of the rotation axis of the electronic device 1000 as the Y-axis direction as an example, at this time, the electronic device 1000 can be folded left and right, and the folding and unfolding of the electronic device 1000 affects the length dimension of the electronic device 1000. In some other embodiments, the rotation axis of the electronic device 1000 can also be the X-axis direction, that is, the electronic device 1000 can be relatively unfolded or folded along the X-axis direction. At this time, the electronic device 1000 can be folded up and down, and the folding and unfolding of the electronic device 1000 affects the width dimension of the electronic device 1000.

[0119] FIG. 5 is a partially exploded view of an embodiment of the electronic device 1000 shown in FIG. 1. FIG. 6 is a partially exploded view of the folding mechanism 100, the first housing 300, and the second housing 400 shown in FIG. 5 in an embodiment.

[0120] As shown in FIGS. 5 and 6, the electronic device 1000 includes the folding mechanism 100, the flexible screen 200, the first housing 300, and the second housing 400. The flexible screen 200 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, or the like. Exemplarily, the thickness direction of the folding mechanism 100 can be the Z-axis direction, the length direction of the folding mechanism 100 can be the Y-axis direction, and the width direction of the folding mechanism 100 can be the X-axis direction. In other embodiments, it can be understood that the coordinate system of the folding mechanism 100 can also be flexibly set according to specific needs.

[0121] As shown in FIGS. 5 and 6, the folding mechanism 100 connects the first housing 300 and the second housing 400. The folding mechanism 100 is used to unfold or fold the first housing 300 and the second housing 400 relative to each other.

[0122] As shown in FIGS. 1 and 2, when the first housing 300 and the second housing 400 are unfolded relative to each other to the flat state, the electronic device 1000 is in the flat state, and the first housing 300 and the second housing 400 can be substantially 180°. In other embodiments, the first housing 300 and the second housing 400 can also have a slight deviation from 180°, for example, 165°, 177°, or 185°, etc.

[0123] As shown in FIGS. 3 and 4, when the first housing 300 and the second housing 400 are folded relative to each other to the closed state, the electronic device 1000 is in the closed state, the first housing 300 and the second housing 400 can be folded to each other, and there can be no large gap between the first housing 300 and the second housing 400. In this way, the appearance experience of the electronic device 1000 is better, and the performance of waterproof, dustproof, and foreign matter prevention is better. The folding of the first housing 300 and the second housing 400 includes the case where they abut against each other, and can also include the case where there is a small gap between them. When there is a small gap between the first housing 300 and the second housing 400, some foreign matters outside the electronic device 1000 will not enter between the first housing 300 and the second housing 400 through the gap.

[0124] The first housing 300 and the second housing 400 can also be unfolded or folded relative to each other to an intermediate state, so that the electronic device 1000 is in the intermediate state, and the intermediate state can be any state between the unfolded state and the closed state.

[0125] Referring to FIG. 5, and in combination with FIGS. 1 to 4, the flexible screen 200 includes a first display area 201, a second display area 202, and a third display area 203. The second display area 202 is connected between the first display area 201 and the third display area 203. FIGS. 1, 2, and 5 all schematically distinguish the first display area 201, the second display area 202, and the third display area 203 by dashed lines. The first display area 201 of the flexible screen 200 can be fixed to the first housing 300. The third display area 203 can be fixed to the second housing 400. During the unfolding or folding of the first housing 300 and the second housing 400 relative to each other, the first housing 300 can drive the first display area 201 to move, the second housing 400 can drive the third display area 203 to move, the first display area 201 and the third display area 203 unfold or fold relative to each other, and the second display area 202 can deform.

[0126] It can be understood that, since the first display area 201 is fixed to the first housing 300, the third display area 203 is fixed to the second housing 400, and the first housing 300 and the second housing 400 unfold or fold relative to each other, the relative unfolding and folding actions between the first display area 201 and the third display area 203 can be accurately controlled, so that the folding process and movement form of the flexible screen 200 are controllable, and the reliability is higher.

[0127] As shown in FIG. 1 and FIG. 2, when the electronic device 1000 is in the unfolded state, the flexible screen 200 can be in the unfolded state. Exemplarily, the first display area 201, the second display area 202 and the third display area 203 of the flexible screen 200 can be 180°. In other embodiments, the first display area 201, the second display area 202 and the third display area 203 can also have a slight deviation from 180°, for example, 165°, 177° or 185°, etc. At this time, the flexible screen 200 has a continuous large-area display area, that is, the flexible screen 200 can realize large-screen display, and the user experience is better.

[0128] Exemplarily, when the electronic device 1000 is in the unfolded state, at least part of the folding mechanism 100 forms a support surface 100a for supporting the second display area 202. In this way, when the second display area 202 is subjected to pressing force, extrusion force or impact force, etc., the folding mechanism 100 can be used to improve the pressure resistance and impact resistance of the second display area 202, that is, to ensure that the second display area 202 is not prone to problems such as concave.

[0129] As shown in FIG. 3 and FIG. 4, when the electronic device 1000 is in the closed state, the flexible screen 200 is in the closed state. Exemplarily, the first display area 201 and the third display area 203 of the flexible screen 200 are close to each other. The second display area 202 is in a bent shape. At this time, the flexible screen 200 can be roughly in the shape of a "water droplet".

[0130] Exemplarily, when the electronic device 1000 is in the closed state, the first display area 201 and the third display area 203 can be located between the first housing 300 and the second housing 400. In addition, at least part of the folding mechanism 100 encloses a receiving space 100b. The second display area 202 is received in the receiving space 100b. In this way, the planar size of the electronic device 1000 is small (has a small width size), which is convenient for the user to carry and store.

[0131] FIG. 7 is a partially exploded schematic view I of an embodiment of the folding mechanism 100 shown in FIG. 6.

[0132] As shown in FIG. 7, the folding mechanism 100 includes a main shaft 1, a first fixed frame 21, a second fixed frame 22, a third fixed frame 23, a fourth fixed frame 24, a first connecting piece 31, a second connecting piece 32, a third connecting piece 33, and a fourth connecting piece 34. The main shaft 1 can be located between the first housing 300 and the second housing 400. In this embodiment, the length extension direction of the main shaft 1 can be the Y-axis direction. The thickness extension direction of the main shaft 1 can be the Z-axis direction. The width extension direction of the main shaft 1 can be the X-axis direction. In other embodiments, the coordinate system of the main shaft 1 can also be flexibly set according to specific needs. For example, the length extension direction of the main shaft 1 is defined as the first direction. The thickness extension direction of the main shaft 1 is the second direction. The width extension direction of the main shaft 1 is the third direction. In other embodiments, the first direction, the second direction, and the third direction can be flexibly set according to specific needs. It is only necessary to ensure that the first direction, the second direction, and the third direction are different from each other.

[0133] It can be understood that FIG. 7 only schematically shows some components included in the folding mechanism 100, and the actual shape, actual size, actual position, and actual structure of these components are not limited by FIG. 7. In other embodiments, the folding mechanism 100 can have more or fewer components. For example, the folding mechanism 100 can have fewer components. The folding mechanism 100 can not include the third fixed frame 23, and / or the fourth fixed frame 24, and / or the third connecting piece 33, and / or the fourth connecting piece 34. The folding mechanism 100 can have more components. The folding mechanism 100 can include more fixed frames, and / or more connecting pieces, and / or synchronization pieces, and / or damping pieces, etc.

[0134] It can be understood that the third fixed frame 23, the fourth fixed frame 24, the third connecting piece 33, and the fourth connecting piece 34 can respectively have the same or similar structure, symmetrical or partially symmetrical structure, or different structure as the first fixed frame 21, the second fixed frame 22, the first connecting piece 31, and the second connecting piece 32. In this embodiment, the basic design of the component structure, the connection relationship design between the components, and the connection relationship design of the components and other structures outside the assembly of the third fixed frame 23, the fourth fixed frame 24, the third connecting piece 33, and the fourth connecting piece 34 can be respectively referred to the related schemes of the first fixed frame 21, the second fixed frame 22, the first connecting piece 31, and the second connecting piece 32, while allowing the components to be slightly different in the detailed structure or position arrangement of the components. Hereinafter, the first fixed frame 21, the second fixed frame 22, the first connecting piece 31, and the second connecting piece 32 will be described as examples. The specific structure of the third fixed frame 23, the fourth fixed frame 24, the third connecting piece 33, and the fourth connecting piece 34 will not be described.

[0135] Fig. 8 is an enlarged schematic view of one embodiment of the spindle 1 shown in Fig. 7 at M1. Fig. 9 is a schematic view of the structure of the spindle 1 shown in Fig. 7 at another angle. Fig. 10 is a schematic view of the structure of the spindle 1 shown in Fig. 7 at still another angle. Fig. 11 is a partial sectional view of one embodiment of the spindle 1 shown in Fig. 9 at C-C line. Fig. 12 is a partial sectional view of one embodiment of the spindle 1 shown in Fig. 8 at D-D line.

[0136] As shown in Figs. 8-12, the spindle 1 includes a spindle body 11, a first protrusion 12, a second protrusion 13, a third protrusion 14, and a fourth protrusion 15. The spindle 1 is a one-piece structure.

[0137] Exemplarily, the length extension direction of the spindle body 11 can be the Y-axis direction. The thickness extension direction of the spindle body 11 can be the Z-axis direction. The width extension direction of the spindle body 11 can be the X-axis direction. In other embodiments, the length extension direction, the thickness extension direction, and the width extension direction of the spindle body 11 can be flexibly set according to specific requirements.

[0138] It can be understood that the spindle 1 can have more or fewer components. For example, the spindle 1 can have more components. The spindle 1 can include more protrusions, such as a fifth protrusion, a sixth protrusion, and the like. The spindle 1 can also have fewer components. For example, the spindle 1 can not include the third protrusion 14 and the fourth protrusion 15.

[0139] In the present embodiment, the spindle 1 is a one-piece structure, so as to have a higher structural strength.

[0140] It can be understood that, compared with a solution of the spindle 1 formed by fixing a plurality of structures by screw locking or the like, the spindle 1 of the present embodiment is a one-piece structure. On the one hand, the number of constituent structures of the spindle 1 is small, and the structure is relatively simple. On the other hand, the process of screw locking or the like can be omitted, so as to simplify the process steps of forming the spindle 1 and reduce the cost investment. On the other hand, the connecting member such as a screw can be omitted, so as to omit the thickness of the connecting member such as a screw in the thickness direction (i.e., the Z-axis direction) of the spindle 1, thereby facilitating the thin design of the folding mechanism and the electronic device.

[0141] Exemplarily, the spindle 1 can be formed by an insert molding process. For example, plastic is first injected into a mold. After the plastic is cured, the mold is removed. In this way, the spindle 1 is prepared.

[0142] As shown in FIGS. 8-12, the spindle body 11 includes a top surface 111 and a bottom surface 112 disposed opposite to each other, a first side surface 113 and a second side surface 114 disposed opposite to each other, and a first end surface 115 and a second end surface 116 disposed opposite to each other. The first side surface 113 and the second side surface 114 of the spindle body 11 are connected between the top surface 111 and the bottom surface 112 of the spindle body 11. The first end surface 115 and the second end surface 116 of the spindle body 11 are connected between the top surface 111 and the bottom surface 112 of the spindle body 11, and are also connected between the first side surface 113 and the second side surface 114 of the spindle body 11. In an embodiment, the top surface 111 and the bottom surface 112 of the spindle body 11 can be arranged along the Z-axis direction. The first end surface 115 and the second end surface 116 of the spindle body 11 can be arranged along the Y-axis direction. The first side surface 113 and the second side surface 114 of the spindle body 11 can be arranged along the X-axis direction.

[0143] As shown in FIGS. 8-12, the spindle body 11 is provided with an inner space 110. The inner space 110 is open at the top surface 111, the first side surface 113, the second side surface 114, the first end surface 115 and the second end surface 116 of the spindle body 11. In other embodiments, the specific form of the inner space 110 of the spindle body 11 is not limited. For example, the inner space 110 of the spindle body 11 is only open at the top surface 111 of the spindle body 11, or is only open at the top surface 111, the first side surface 113 and the second side surface 114, etc.

[0144] As shown in FIGS. 8-12, the inner space 110 of the spindle body 11 includes a bottom wall 1101 and first and second side walls 1102, 1103 disposed opposite to each other. The first and second side walls 1102, 1103 of the inner space 110 are arranged along the length direction of the spindle 1. The bottom wall 1101 of the inner space 110 connects the first and second side walls 1102, 1103 of the inner space 110.

[0145] As shown in FIGS. 8-12, the inner space 110 of the spindle body 11 includes a bottom wall 1101 and first and second side walls 1102, 1103 disposed opposite to each other. The first and second side walls 1102, 1103 of the inner space 110 are arranged along the length direction of the spindle 1. The bottom wall 1101 of the inner space 110 connects the first and second side walls 1102, 1103 of the inner space 110.

[0146] As shown in FIGS. 8-12, the inner space 110 of the spindle body 11 includes a bottom wall 1101 and first and second side walls 1102, 1103 disposed opposite to each other. The first and second side walls 1102, 1103 of the inner space 110 are arranged along the length direction of the spindle 1. The bottom wall 1101 of the inner space 110 connects the first and second side walls 1102, 1103 of the inner space 110.

[0147] As shown in FIGS. 8-12, the surface of the first protrusion 12 facing the bottom surface 112 of the spindle body 11 includes a second arc surface 121, i.e., the second arc surface 121 of the first protrusion 12 or the second arc surface 121 of the spindle 1. The second arc surface 121 of the spindle 1 is spaced apart from the first arc surface 117 of the spindle 1 along the Y-axis direction. In addition, in the Z-axis direction, the second arc surface 121 of the spindle 1 is different in height from the first arc surface 117 of the spindle 1.

[0148] As shown in FIGS. 8-12, the surface of the second protrusion 13 facing the bottom surface 112 of the spindle body 11 includes a third arc surface 131, i.e., the third arc surface 131 of the second protrusion 13 or the third arc surface 131 of the spindle 1. The third arc surface 131 of the spindle 1 is located on the side of the first arc surface 117 of the spindle 1 away from the second arc surface 121 of the spindle 1, i.e., the second arc surface 121 of the spindle 1, the first arc surface 117 of the spindle 1 and the third arc surface 131 of the spindle 1 are sequentially spaced apart along the Y-axis direction. In addition, in the Z-axis direction, the third arc surface 131 of the spindle 1 is different in height from the first arc surface 117 of the spindle 1.

[0149] Exemplarily, the axis of the second arc surface 121 of the spindle 1, the axis of the first arc surface 117 of the spindle 1 and the axis of the third arc surface 131 of the spindle 1 are on the same straight line. It can be understood that, within the range of tolerances, the axis of the second arc surface 121 of the spindle 1, the axis of the first arc surface 117 of the spindle 1 and the axis of the third arc surface 131 of the spindle 1 being on the same straight line can allow certain errors.

[0150] Exemplarily, in the Z-axis direction, the height of the second arc surface 121 of the spindle 1 is the same as the height of the third arc surface 131 of the spindle 1. In this way, during the preparation of the spindle 1, it is beneficial to achieve that the axis of the second arc surface 121 of the spindle 1 and the axis of the third arc surface 131 of the spindle 1 are on the same straight line.

[0151] It can be understood that, by arranging the second arc surface 121 of the spindle 1, the first arc surface 117 of the spindle 1 and the third arc surface 131 of the spindle 1 to be spaced apart along the Y-axis direction, and in the Z-axis direction, the second arc surface 121 of the spindle 1 is different in height from the first arc surface 117 of the spindle 1, and the third arc surface 131 of the spindle 1 is different in height from the first arc surface 117 of the spindle 1, the cooperation of the second arc surface 121 of the spindle 1, the first arc surface 117 of the spindle 1 and the third arc surface 131 of the spindle 1 is used to facilitate the formation of the arc-shaped groove structure of the spindle 1. The arc-shaped groove structure of the spindle 1 can be used to form a rotating connection structure with the arc-shaped blocks of other structural members, such as the first connecting member 31.

[0152] It can be understood that, compared with the scheme that the two arc surfaces of the arc-shaped groove are arranged opposite along the Z-axis direction, the second arc surface 121 of the main shaft 1, the first arc surface 117 of the main shaft 1 and the third arc surface 131 of the main shaft 1 are arranged spaced apart along the Y-axis direction in the embodiment, on the one hand, during the preparation of the arc-shaped groove of the main shaft 1, the second arc surface 121 of the main shaft 1, the first arc surface 117 of the main shaft 1 and the third arc surface 131 of the main shaft 1 will not interfere with each other, thereby making the preparation process of the arc-shaped groove of the main shaft 1 simpler; on the other hand, the distance between the second arc surface 121 of the main shaft 1 and the first arc surface 117 of the main shaft 1 along the Z-axis direction, and the distance between the third arc surface 131 of the main shaft 1 and the first arc surface 117 of the main shaft 1 along the Z-axis direction can be greatly reduced, thereby facilitating the thin type setting of the main shaft 1.

[0153] As shown in FIGS. 8 to 12, the main shaft body 11 is provided with a first through hole 161 and a second through hole 162. The first through hole 161 and the second through hole 162 are both open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110. Among them, at least part of the first through hole 161 is arranged opposite to the second arc surface 121 of the first protrusion 12. At least part of the second through hole 162 is arranged opposite to the third arc surface 131 of the second protrusion 13.

[0154] It can be understood that, by providing the first through hole 161 in the main shaft body 11, the first through hole 161 is open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110, and the first through hole 161 is arranged opposite to the second arc surface 121 of the first protrusion 12, so that after the second arc surface 121 of the main shaft 1 is formed, the mold can be taken out along the Z-axis direction and through the first through hole 161. In other words, the first through hole 161 can facilitate the removal of the mold after the second arc surface 121 of the main shaft 1 is formed. The ejection mode of the main shaft 1 of the embodiment is relatively simple. Similarly, the second through hole 162 is provided in the main shaft body 11, the second through hole 162 is open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110, at least part of the second through hole 162 is arranged opposite to the third arc surface 131 of the second protrusion 13, and the second through hole 162 can facilitate the removal of the mold after the third arc surface 131 of the main shaft 1 is formed.

[0155] In other embodiments, the main shaft body 11 can only be provided with the first through hole 161 or only be provided with the second through hole 162, or neither the first through hole 161 nor the second through hole 162 can be provided.

[0156] As shown in FIGS. 8-12, the inner space 110 includes a third side wall 1104 and a fourth side wall 1105, which are oppositely arranged and arranged along the length direction of the main shaft 1. The bottom wall 1101 of the inner space 110 connects the third side wall 1104 and the fourth side wall 1105 of the inner space 110. The third side wall 1104 and the fourth side wall 1105 of the inner space 110 are spaced apart from the first side wall (1102) and the second side wall (1103) of the inner space 110.

[0157] As shown in FIGS. 8-12, the third side wall 1104 of the inner space 110 can be arranged along the X-axis direction with the first side wall 1102 of the inner space 110.

[0158] As shown in FIGS. 8-12, the fourth side wall 1105 of the inner space 110 can be arranged along the X-axis direction with the second side wall 1103 of the inner space 110.

[0159] The bottom wall 1101 of the inner space 110 includes a fourth arc surface 118, i.e., the fourth arc surface 118 of the main shaft 1. The fourth arc surface 118 of the main shaft 1 is spaced apart from the first arc surface 117 of the main shaft 1.

[0160] As shown in FIGS. 8-12, the fourth arc surface 118 of the main shaft 1 can be arranged along the X-axis direction with the first arc surface 117 of the main shaft 1.

[0161] As shown in FIGS. 8-12, the fourth arc surface 118 of the main shaft 1 can be arranged along the X-axis direction with the first arc surface 117 of the main shaft 1.

[0162] As shown in FIGS. 8-12, the third protrusion 14 is protruded from the third side wall 1104 of the inner space 110 and spaced apart from the bottom wall 1101 of the inner space 110. The fourth protrusion 15 is protruded from the fourth side wall 1105 of the inner space 110 and spaced apart from the bottom wall 1101 of the inner space 110.

[0163] As shown in FIGS. 8-12, the third protrusion 14 can be arranged along the Y-axis direction with the first protrusion 12.

[0164] As shown in FIGS. 8-12, the third protrusion 14 can be arranged along the Y-axis direction with the first protrusion 12.

[0165] As shown in FIGS. 8-12, the fifth arc surface 141 of the main shaft 1 can be arranged along the X-axis direction with the second arc surface 121 of the main shaft 1.

[0166] Exemplarily, the fifth curved surface 141 of the main shaft 1 and the second curved surface 121 of the main shaft 1 can be a mirror-symmetrical structure.

[0167] Exemplarily, the surface of the fourth protrusion 15 facing the bottom surface 112 of the main shaft body 11 comprises a sixth curved surface 151, that is, the sixth curved surface 151 of the fourth protrusion 15 or the sixth curved surface 151 of the main shaft 1. The sixth curved surface 151 of the main shaft 1 is located on the side of the fourth curved surface 118 of the main shaft 1 away from the fifth curved surface 141 of the main shaft 1, that is, the fifth curved surface 141 of the main shaft 1, the fourth curved surface 118 of the main shaft 1 and the sixth curved surface 151 of the main shaft 1 are sequentially arranged along the Y-axis direction. In addition, in the Z-axis direction, the sixth curved surface 151 of the main shaft 1 and the fourth curved surface 118 of the main shaft 1 have a height difference.

[0168] Exemplarily, the axis of the sixth curved surface 151 of the main shaft 1, the axis of the fourth curved surface 118 of the main shaft 1 and the axis of the fifth curved surface 141 of the main shaft 1 are on the same straight line. It can be understood that, within the range of tolerances, the axis of the sixth curved surface 151 of the main shaft 1, the axis of the fourth curved surface 118 of the main shaft 1 and the axis of the fifth curved surface 141 of the main shaft 1 being on the same straight line can allow certain errors.

[0169] Exemplarily, in the Z-axis direction, the height of the sixth curved surface 151 of the main shaft 1 is the same as the height of the fifth curved surface 141 of the main shaft 1. In this way, during the preparation of the main shaft 1, it is beneficial to realize that the axis of the sixth curved surface 151 of the main shaft 1 and the axis of the fifth curved surface 141 of the main shaft 1 are on the same straight line.

[0170] Exemplarily, the fourth protrusion 15 and the second protrusion 13 can be a mirror-symmetrical structure.

[0171] Exemplarily, the sixth curved surface 151 of the main shaft 1 and the third curved surface 131 of the main shaft 1 can be arranged along the X-axis direction.

[0172] Exemplarily, the sixth curved surface 151 of the main shaft 1 and the third curved surface 131 of the main shaft 1 can be a mirror-symmetrical structure.

[0173] It can be understood that, by sequentially arranging the fifth curved surface 141 of the main shaft 1, the fourth curved surface 118 of the main shaft 1 and the sixth curved surface 151 of the main shaft 1 along the Y-axis direction, and in the Z-axis direction, the fifth curved surface 141 of the main shaft 1 and the fourth curved surface 118 of the main shaft 1 have a height difference, and the sixth curved surface 151 of the main shaft 1 and the fourth curved surface 118 of the main shaft 1 have a height difference, the cooperation of the fifth curved surface 141 of the main shaft 1, the fourth curved surface 118 of the main shaft 1 and the sixth curved surface 151 of the main shaft 1 is used to facilitate the formation of the arc-shaped groove structure of the main shaft 1. The arc-shaped groove structure of the main shaft 1 can be used to form a rotating connection structure with the arc-shaped block of other structural members (for example, the second connecting member 32).

[0174] It can be understood that, compared with the scheme that the two arc surfaces of the arc-shaped groove are arranged opposite along the Z-axis direction, the fifth arc surface 141 of the main shaft 1, the fourth arc surface 118 of the main shaft 1 and the sixth arc surface 151 of the main shaft 1 are sequentially and spaced apart along the Y-axis direction in the embodiment, on the one hand, in the process of preparing the arc-shaped groove of the main shaft 1, the fifth arc surface 141 of the main shaft 1, the fourth arc surface 118 of the main shaft 1 and the sixth arc surface 151 of the main shaft 1 do not interfere with each other, so that the preparation process of the arc-shaped groove of the main shaft 1 is simpler; on the other hand, the distance between the fifth arc surface 141 of the main shaft 1 and the fourth arc surface 118 of the main shaft 1 in the Z-axis direction and the distance between the sixth arc surface 151 of the main shaft 1 and the fourth arc surface 118 of the main shaft 1 in the Z-axis direction can be greatly reduced, thereby facilitating the thin type setting of the main shaft 1.

[0175] As shown in FIGS. 8-12, the main shaft body 11 is provided with a third through hole 163 and a fourth through hole 164. The third through hole 163 and the fourth through hole 164 are both open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110. Among them, at least part of the third through hole 163 is arranged opposite to the fifth arc surface 141 of the third protrusion 14. At least part of the fourth through hole 164 is arranged opposite to the sixth arc surface 151 of the fourth protrusion 15.

[0176] It can be understood that, in the embodiment, the third through hole 163 is arranged on the main shaft body 11, the third through hole 163 is open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110, and at least part of the third through hole 163 is arranged opposite to the fifth arc surface 141 of the third protrusion 14, so that the third through hole 163 can be taken out after the fifth arc surface 141 of the main shaft 1 is formed. Similarly, the fourth through hole 164 is arranged on the main shaft body 11 and is open at the bottom surface 112 of the main shaft body 11 and the bottom wall 1101 of the inner space 110, and at least part of the fourth through hole 164 is arranged opposite to the sixth arc surface 151 of the fourth protrusion 15, so that the fourth through hole 164 can be taken out after the sixth arc surface 151 of the main shaft 1 is formed.

[0177] In other embodiments, the main shaft body 11 can only be provided with the third through hole 163 or only be provided with the fourth through hole 164, or neither the third through hole 163 nor the fourth through hole 164 can be provided.

[0178] It can be understood that FIGS. 8-12 only schematically show the structure of one end of the main shaft 1. The structure shown in FIGS. 8-12 can also be arranged at other positions of the main shaft 1. Details are not repeated here.

[0179] Fig. 13 is a structural schematic view of an embodiment of the first connecting member 31 and the second connecting member 32 shown in Fig. 7. Fig. 14 is a structural schematic view of the first connecting member 31 and the second connecting member 32 shown in Fig. 13 from another angle. Fig. 15 is a structural schematic view of the first connecting member 31 and the second connecting member 32 shown in Fig. 13 from yet another angle.

[0180] As shown in Figs. 13 and 15, exemplarily, the first connecting member 31 comprises a first rotating end 311, a first connecting section 312, and a first movable end 313. The first connecting section 312 of the first connecting member 31 is connected between the first rotating end 311 and the first movable end 313 of the first connecting member 31. The first connecting member 31 can be a one-piece structure to have a higher structural strength. In other embodiments, the first connecting member 31 can not comprise the first connecting section 312.

[0181] As shown in Figs. 13 and 15, exemplarily, the first rotating end 311 of the first connecting member 31 comprises a first body portion 3111, a first protruding portion 3112, and a second protruding portion 3113.

[0182] As shown in Figs. 13 and 15, exemplarily, the first body portion 3111 of the first rotating end 311 of the first connecting member 31 comprises a top surface 3114 and a bottom surface 3115 arranged oppositely, and a first side surface 3116 and a second side surface 3117 arranged oppositely. The first side surface 3116 and the second side surface 3117 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31 are connected between the top surface 3114 and the bottom surface 3115 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31.

[0183] Exemplarily, the bottom surface 3115 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31 comprises a first arc surface 314. In an embodiment, a portion of the bottom surface 3115 of the first body portion 3111 is recessed towards the top surface 3114 of the first body portion 3111 to form the first arc surface 314.

[0184] As shown in Figs. 13 and 15, exemplarily, the first protruding portion 3112 of the first rotating end 311 of the first connecting member 31 protrudes from the first side surface 3116 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31. The second protruding portion 3113 of the first rotating end 311 of the first connecting member 31 protrudes from the second side surface 3117 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31.

[0185] Exemplarily, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 comprises a second arc surface 315. The second arc surface 315 of the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 is towards the same side as the top surface 3114 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31.

[0186] Exemplarily, the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 comprises a third arc surface 316. The third arc surface 316 of the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 is towards the same side as the top surface 3114 of the first body portion 3111 of the first rotating end 311 of the first connecting member 31.

[0187] Exemplarily, the first protrusion 3112 and the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 can each be in an arc shape.

[0188] As shown in FIGS. 13 and 15, exemplarily, the first movable end 313 of the first connecting member 31 is provided with a rotating shaft hole 3131. In other embodiments, the first movable end 313 of the first connecting member 31 can also adopt other structures. The specific embodiments are not limited herein.

[0189] As shown in FIGS. 13 and 15, exemplarily, the second connecting member 32 can comprise a second rotating end 321, a second connecting segment 322 and a second movable end 323. The second connecting segment 322 of the second connecting member 32 is connected between the second rotating end 321 and the second movable end 323 of the second connecting member 32. The second connecting member 32 can be an integrally formed structural member to have higher structural strength. In other embodiments, the second connecting member 32 can also not comprise the second connecting segment 322.

[0190] Exemplarily, the second rotating end 321 of the second connecting member 32 comprises a second body portion 3211, a third protrusion 3212 and a fourth protrusion 3213.

[0191] As shown in FIGS. 13 and 15, the second body portion 3211 of the second rotating end 321 of the second connecting member 32 comprises oppositely arranged top and bottom surfaces 3214 and 3215, and oppositely arranged first and second side surfaces 3216 and 3217. The first and second side surfaces 3216 and 3217 of the second body portion 3211 of the second rotating end 321 of the second connecting member 32 are connected between the top and bottom surfaces 3214 and 3215 of the second body portion 3211 of the second rotating end 321 of the second connecting member 32.

[0192] Exemplarily, the bottom surface 3215 of the second body part 3211 of the second rotating end 321 of the second connecting member 32 comprises a fourth arc surface 324. In an embodiment, the bottom surface 3215 of the second body part 3211 is concave towards the top surface 3214 of the second body part 3211 to form the fourth arc surface 324 of the second connecting member 32.

[0193] As shown in FIG. 13 and FIG. 15, the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 protrudes from the first side surface 3216 of the second body part 3211 of the second rotating end 321 of the second connecting member 32. The fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 protrudes from the second side surface 3217 of the second body part 3211 of the second rotating end 321 of the second connecting member 32.

[0194] Exemplarily, the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 comprises a fifth arc surface 325. The fifth arc surface 325 of the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 is towards the same side as the top surface 3214 of the second body part 3211 of the second rotating end 321 of the second connecting member 32.

[0195] Exemplarily, the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 comprises a sixth arc surface 326. The sixth arc surface 326 of the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 is towards the same side as the top surface 3214 of the second body part 3211 of the second rotating end 321 of the second connecting member 32.

[0196] Exemplarily, the third protrusion 3212 and the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 can both be arc-shaped.

[0197] As shown in FIG. 13 and FIG. 15, exemplarily, the first movable end 313 of the first connecting member 31 is provided with a rotating shaft hole 3131. In other embodiments, the first movable end 313 of the first connecting member 31 can also adopt other structures. The specific embodiments are not limited herein.

[0198] It can be understood that the second connecting member 32 and the first connecting member 31 can be the same or similar structure, symmetrical or partially symmetrical structure, or different structure. In the present embodiment, the second connecting member 32 and the first connecting member 31 are symmetrical structure, the basic design of the component structure of the second connecting member 32, the connection relationship design between the components, and the connection relationship design of the components and other structures outside the assembly can refer to the related solutions of the first connecting member 31, and meanwhile, the second connecting member 32 and the first connecting member 31 can be slightly different in the detailed structure or position arrangement of the components.

[0199] Fig. 16 is a partially exploded schematic view II of one embodiment of the folding mechanism 100 shown in Fig. 6. Fig. 17 is a partially cross-sectional view of one embodiment of the folding mechanism 100 shown in Fig. 16 at line E-E. Fig. 18 is a partially cross-sectional view of one embodiment of the folding mechanism 100 shown in Fig. 16 at line F-F. Fig. 19 is a partially cross-sectional view of one embodiment of the folding mechanism 100 shown in Fig. 16 at line G-G.

[0200] Referring to Figs. 16-19, and in conjunction with Figs. 8-15, exemplary, the first body portion 3111 of the first rotating end 311 of the first connecting member 31 is located in the inner space 110 of the main shaft 1 and between the first protrusion 12 and the second protrusion 13 of the main shaft 1. In this way, the movement of the first rotating end 311 of the first connecting member 31 in the Y-axis direction can be limited by the cooperation of the first protrusion 12 and the second protrusion 13 of the main shaft 1, thereby preventing the first rotating end 311 of the first connecting member 31 from being pulled out in the Y-axis direction.

[0201] Referring to Figs. 16-19, and in conjunction with Figs. 8-15, exemplary, a portion of the first protruding portion 3112 of the first rotating end 311 of the first connecting member 31 is located between the first protrusion 12 of the main shaft 1 and the main shaft body 11. A portion of the second protruding portion 3113 of the first rotating end 311 of the first connecting member 31 is located between the second protrusion 13 of the main shaft 1 and the main shaft body 11. In this way, the movement of the first rotating end 311 of the first connecting member 31 in the Z-axis direction can be limited by the cooperation of the first protrusion 12 and the main shaft body 11 of the main shaft 1, and the cooperation of the second protrusion 13 and the main shaft body 11 of the main shaft 1, thereby preventing the first rotating end 311 of the first connecting member 31 from being pulled out in the Z-axis direction.

[0202] Referring to Fig. 16, and in conjunction with Figs. 8-15, exemplary, when the folding mechanism 100 is in the unfolded state, the top surface 3114 of the first rotating end 311 of the first connecting member 31 faces the same side as the top surface 111 of the main shaft 1. The bottom surface 3115 of the first rotating end 311 of the first connecting member 31 faces the bottom wall 1101 of the inner space 110 of the main shaft 1. The first movable end 313 of the first connecting member 31 is located on the side of the first side surface 113 of the main shaft 1 away from the second side surface 114 of the main shaft 1.

[0203] Referring to Fig. 17, and in conjunction with Figs. 8-15, exemplary, the first arc surface 314 of the first rotating end 311 of the first connecting member 31 is in contact with the first arc surface 117 of the inner space 110 of the main shaft 1, and the two can move relative to each other.

[0204] Please refer to FIG. 18, and in combination with FIGS. 8-15, it is shown that, for example, the second arc surface 315 of the first rotating end 311 of the first connecting member 31 is in contact with the second arc surface 121 of the first protrusion 12 of the main shaft 1, and the two can move relative to each other.

[0205] Please refer to FIG. 19, and in combination with FIGS. 8-15, it is shown that, for example, the third arc surface 316 of the first rotating end 311 of the first connecting member 31 is in contact with the third arc surface 131 of the second protrusion 13 of the main shaft 1, and the two can move relative to each other.

[0206] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it can be understood that, through the cooperation of the first arc surface 314 of the first rotating end 311 of the first connecting member 31 and the first arc surface 117 of the main shaft 1, the cooperation of the second arc surface 315 of the first rotating end 311 of the first connecting member 31 and the second arc surface 121 of the main shaft 1, and the cooperation of the third arc surface 316 of the first rotating end 311 of the first connecting member 31 and the third arc surface 131 of the main shaft 1, the first rotating end 311 of the first connecting member 31 and the main shaft 1 can form a rotating connection structure through the cooperation of the arc-shaped block and the arc-shaped groove, that is, the first rotating end 311 of the first connecting member 31 and the main shaft 1 can be rotatably connected through a virtual shaft. The structure of the virtual shaft rotating connection is simple, occupies small space, and is conducive to reducing the thickness of the folding mechanism, so that the folding mechanism and the electronic device are more easily realized thin and light.

[0207] In an embodiment, since the height of the second arc surface 121 of the main shaft 1 is the same as the height of the third arc surface 131 of the main shaft 1, the second arc surface 315 of the first rotating end 311 of the first connecting member 31 is more easily cooperated with the second arc surface 121 of the main shaft 1, and the third arc surface 316 of the first rotating end 311 of the first connecting member 31 is more easily cooperated with the third arc surface 131 of the main shaft 1.

[0208] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it is shown that, for example, when the folding mechanism 100 is in the unfolded state, most of the first body part 3111 of the first rotating end 311 of the first connecting member 31 turns into the inner space 110 of the main shaft 1, and most of it is located between the first protrusion 12 and the second protrusion 13 of the main shaft 1. In addition, most of the first protruding part 3112 of the first rotating end 311 of the first connecting member 31 turns between the first protrusion 12 of the main shaft 1 and the main shaft body 11, and most of the second protruding part 3113 of the first rotating end 311 of the first connecting member 31 turns between the second protrusion 13 of the main shaft 1 and the main shaft body 11.

[0209] FIG. 20 is a cross-sectional view of part of the folding mechanism 100 shown in FIG. 18 in a closed state.

[0210] Please refer to FIG. 20, and in combination with FIGS. 8-15, it is exemplarily shown that when the folding mechanism 100 is in the closed state, a part of the first body portion 3111 of the first rotating end 311 of the first connecting member 31 turns out of the inner space 110 of the main shaft 1, and a part is located between the first protrusion 12 and the second protrusion 13 of the main shaft 1. In addition, a part of the first protruding portion 3112 of the first rotating end 311 of the first connecting member 31 turns out of the first protrusion 12 of the main shaft 1 and the main shaft body 11, and a part of the second protruding portion 3113 of the first rotating end 311 of the first connecting member 31 turns out of the second protrusion 13 of the main shaft 1 and the main shaft body 11.

[0211] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it is shown that the second body portion 3211 of the second rotating end 321 of the second connecting member 32 is located in the inner space 110 of the main shaft 1, and between the third protrusion 14 and the fourth protrusion 15 of the main shaft 1. In this way, by cooperating with the third protrusion 14 and the fourth protrusion 15 of the main shaft 1, the movement of the second rotating end 321 of the second connecting member 32 in the Y-axis direction can be limited, so as to prevent the second rotating end 321 of the second connecting member 32 from being pulled out in the Y-axis direction.

[0212] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it is exemplarily shown that a part of the third protruding portion 3212 of the second rotating end 321 of the second connecting member 32 is located between the third protrusion 14 of the main shaft 1 and the main shaft body 11. A part of the fourth protruding portion 3213 of the second rotating end 321 of the second connecting member 32 is located between the fourth protrusion 15 of the main shaft 1 and the main shaft body 11. In this way, by cooperating with the third protrusion 14 and the main shaft body 11 of the main shaft 1, and cooperating with the fourth protrusion 15 and the main shaft body 11, the movement of the second rotating end 321 of the second connecting member 32 in the Z-axis direction can be limited, so as to prevent the second rotating end 321 of the second connecting member 32 from being pulled out in the Z-axis direction.

[0213] Please refer to FIG. 16, and in combination with FIGS. 8-15, it is exemplarily shown that when the folding mechanism 100 is in the unfolded state, the top surface 3214 of the second rotating end 321 of the second connecting member 32 faces the same side as the top surface 111 of the main shaft 1. The bottom surface 3215 of the second rotating end 321 of the second connecting member 32 faces the bottom wall 1101 of the inner space 110 of the main shaft 1. The second movable end 323 of the second connecting member 32 is located on the side of the second side surface 114 of the main shaft 1 away from the first side surface 113 of the main shaft 1.

[0214] Please refer to FIG. 17, and in combination with FIGS. 8-15, it is exemplarily shown that the fourth arc surface 324 of the second rotating end 321 of the second connecting member 32 is in contact with the fourth arc surface 118 of the main shaft 1, and the two can move relative to each other.

[0215] Please refer to FIG. 18, and in combination with FIGS. 8-15, the fifth arc surface 325 of the second rotating end 321 of the second connecting piece 32 is in contact with the fifth arc surface 141 of the third protrusion 14 of the main shaft 1, and the two can move relative to each other.

[0216] Please refer to FIG. 19, and in combination with FIGS. 8-15, the sixth arc surface 326 of the second rotating end 321 of the second connecting piece 32 is in contact with the sixth arc surface 151 of the fourth protrusion 15 of the main shaft 1, and the two can move relative to each other.

[0217] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it can be understood that through the cooperation of the fourth arc surface 324 of the second rotating end 321 of the second connecting piece 32 and the fourth arc surface 118 of the main shaft 1, the cooperation of the fifth arc surface 325 of the second rotating end 321 of the second connecting piece 32 and the fifth arc surface 141 of the main shaft 1, and the cooperation of the sixth arc surface 326 of the second rotating end 321 of the second connecting piece 32 and the sixth arc surface 151 of the main shaft 1, the second rotating end 321 of the second connecting piece 32 and the main shaft 1 can be connected through the cooperation of the arc block and the arc groove to form a rotating connection structure, that is, the second rotating end 321 of the second connecting piece 32 and the main shaft 1 can be connected through a virtual shaft. The structure of the virtual shaft rotating connection is simple, occupies small space, and is beneficial to reducing the thickness of the folding mechanism 100, so that the folding mechanism 100 and the electronic device are more easily realized to be light and thin.

[0218] In an embodiment, in the Z-axis direction, the height of the sixth arc surface 151 of the main shaft 1 is the same as the height of the fifth arc surface 141 of the main shaft 1, so that the fifth arc surface 325 of the second rotating end 321 of the second connecting piece 32 and the fifth arc surface 141 of the main shaft 1 are more easily cooperated, and the sixth arc surface 326 of the second rotating end 321 of the second connecting piece 32 and the sixth arc surface 151 of the main shaft 1 are more easily cooperated.

[0219] Please refer to FIGS. 16-19, and in combination with FIGS. 8-15, it can be understood that when the folding mechanism 100 is in the unfolded state, most of the second body part 3211 of the second rotating end 321 of the second connecting piece 32 is turned into the inner space 110 of the main shaft 1, and most of it is located between the third protrusion 14 and the fourth protrusion 15 of the main shaft 1. In addition, most of the third protrusion 3212 of the second rotating end 321 of the second connecting piece 32 is turned between the third protrusion 14 of the main shaft 1 and the main shaft body 11, and most of the fourth protrusion 3213 of the second rotating end 321 of the second connecting piece 32 is turned between the fourth protrusion 15 of the main shaft 1 and the main shaft body 11.

[0220] Please refer to FIG. 20, and in combination with FIG. 8 to FIG. 15, it is exemplarily shown that when the folding mechanism 100 is in the closed state, a part of the second body portion 3211 of the second rotating end 321 of the second connecting member 32 turns out of the inner space 110 of the main shaft 1, and a part is located between the third protrusion 14 and the fourth protrusion 15 of the main shaft 1. In addition, a part of the third protruding portion 3212 of the second rotating end 321 of the second connecting member 32 turns out between the third protrusion 14 of the main shaft 1 and the main shaft body 11, and a part of the fourth protruding portion 3213 of the second rotating end 321 of the second connecting member 32 turns out between the fourth protrusion 15 of the main shaft 1 and the main shaft body 11.

[0221] Please refer to FIG. 16 and FIG. 19, and in combination with FIG. 8 to FIG. 15, it is exemplarily shown that when the folding mechanism 100 is in the unfolded state, the first connecting member 31 and the second connecting member 32 can be opened to each other, and the first connecting member 31 and the second connecting member 32 can be substantially 180°. In other embodiments, the first connecting member 31 and the second connecting member 32 can also have a slight deviation from 180°, for example, 160°, 170° or 183°, etc.

[0222] Please refer to FIG. 20, and in combination with FIG. 8 to FIG. 15, it is exemplarily shown that when the folding mechanism 100 is in the closed state, the first connecting member 31 and the second connecting member 32 can be folded to each other, and the first connecting member 31 and the second connecting member 32 are oppositely arranged and enclose the accommodation space 10 with the main shaft 1. Among them, the inner space 110 of the main shaft 1 constitutes a part of the accommodation space 10, that is, the accommodation space 10 includes the inner space 110 of the main shaft 1.

[0223] It can be understood that, when the folding mechanism 100 is in the closed state, the accommodation space 10 can be increased to a large extent due to the fact that the accommodation space 10 comprises the inner side space 110 of the main shaft 1. When the folding mechanism 100 is applied to the electronic device 1000 with the flexible screen 200, the accommodation space 10 of the folding mechanism can be used to form the accommodation space 100b (see FIG. 4). At this time, the accommodation space 100b (see FIG. 4) can also be increased to a large extent due to the fact that the accommodation space 10 can be increased to a large extent. In this way, when the second display area 202 (see FIG. 4) of the flexible screen 200 (see FIG. 4) is located in the accommodation space 100b (see FIG. 4), the free deformation space of the second display area 202 (see FIG. 4) of the flexible screen 200 (see FIG. 4) is released, and the bending degree of the second display area 202 (see FIG. 4) of the flexible screen 200 (see FIG. 4) can be small. At this time, the second display area 202 (see FIG. 4) of the flexible screen 200 (see FIG. 4) is not easy to be damaged, and the reliability of the flexible screen 200 (see FIG. 4) is better. In particular, when the electronic device 1000 is in an irregular environment such as falling or impact, the folding mechanism 100 is not easy to squeeze the flexible screen 200 (see FIG. 4), and the flexible screen 200 (see FIG. 4) is not easy to fail.

[0224] FIG. 21 is a structural schematic diagram of an embodiment of the first fixing frame 21 and the second fixing frame 22 shown in FIG. 7.

[0225] As shown in FIG. 21, exemplarily, the first fixing frame 21 comprises a top surface 211a and a bottom surface 211b arranged oppositely.

[0226] Exemplarily, the first fixing frame 21 is provided with a first movable space 212. The first movable space 212 can form an opening on the top surface 211a of the first fixing frame 21. The first movable space 212 of the first fixing frame 21 comprises a first side wall 2121 and a second side wall 2122 arranged oppositely. The first side wall 2121 and the second side wall 2122 of the first movable space 212 of the first fixing frame 21 are each provided with a rotating shaft hole 213.

[0227] As shown in FIG. 21, exemplarily, the second fixing frame 22 comprises a top surface 221a and a bottom surface 221b arranged oppositely.

[0228] Exemplarily, the second fixing frame 22 is provided with a second movable space 222. The second movable space 222 can form an opening on the top surface 221a of the second fixing frame 22. The second movable space 222 of the second fixing frame 22 comprises a first side wall 2221 and a second side wall 2222 arranged oppositely. The first side wall 2221 and the second side wall 2222 of the second movable space 222 of the second fixing frame 22 are each provided with a rotating shaft hole 223.

[0229] Figure 22 is a partially exploded schematic view II of an embodiment of the folding mechanism 100 shown in Figure 6. Figure 23 is a partially exploded schematic view III of an embodiment of the folding mechanism 100 shown in Figure 6. Figure 24 is a partially cross-sectional view of an embodiment of the folding mechanism 100 shown in Figure 23 at the line H-H.

[0230] Referring to Figures 22-24, in combination with Figures 13, 14, 15 and 21, the first movable end 313 of the first connecting member 31 is rotationally connected to the first fixed frame 21.

[0231] Exemplarily, the folding mechanism 100 further comprises a first rotation shaft 71.

[0232] Exemplarily, the first movable end 313 of the first connecting member 31 can be located in the first movable space 212 of the first fixed frame 21. Further, the first rotation shaft 71 sequentially passes through the rotation shaft hole 3131 of the first movable end 313 of the first connecting member 31 and the rotation shaft hole 213 of the first movable space 212 of the first fixed frame 21. In an embodiment, the first rotation shaft 71 can be fixed in the rotation shaft hole 213 of the first movable space 212 of the first fixed frame 21. The first rotation shaft 71 can rotate relative to the hole wall of the rotation shaft hole 3131 of the first movable end 313 of the first connecting member 31.

[0233] In the present embodiment, the first movable end 313 of the first connecting member 31 is rotationally connected to the first fixed frame 21 through a solid shaft. At this time, the connection between the first movable end 313 of the first connecting member 31 and the first fixed frame 21 is reliable, the rotation virtual position is small, and the rotation action is accurate and stable.

[0234] In other embodiments, the first movable end 313 of the first connecting member 31 can also be rotationally connected to the first fixed frame 21 through other rotation modes. For example, the first movable end 313 of the first connecting member 31 and the first fixed frame 21 can be rotationally connected through an arc-shaped block and an arc-shaped groove to form a rotation connection structure, i.e., the first movable end 313 of the first connecting member 31 and the first fixed frame 21 can be rotationally connected through a virtual shaft. It can be understood that the structure rotationally connected through a virtual shaft is simple, occupies small space, and is conducive to reducing the thickness of the folding mechanism 100, so that the folding mechanism 100 and the electronic device 1000 are more easily realized to be light and thin.

[0235] In other embodiments, the connection mode of the first movable end 313 of the first connecting member 31 and the first fixed frame 21 is not limited to rotationally connecting. For example, the first movable end 313 of the first connecting member 31 and the first fixed frame 21 can also be slidingly connected. The specific embodiments are not limited in the present application.

[0236] Referring to FIGS. 22-24, and in combination with FIGS. 13, 14, 15, and 21, the second movable end 323 of the second connecting member 32 is rotationally connected to the second fixed frame 22.

[0237] Exemplarily, the folding mechanism 100 further comprises a second rotation shaft 72.

[0238] Exemplarily, the second movable end 323 of the second connecting member 32 can be located in the second movable space 222 of the second fixed frame 22. Further, the second rotation shaft 72 sequentially passes through the rotation shaft hole 3231 of the second movable end 323 of the second connecting member 32 and the rotation shaft hole 223 of the second movable space 222 of the second fixed frame 22. In an embodiment, the second rotation shaft 72 can be fixed in the rotation shaft hole 223 of the second movable space 222 of the second fixed frame 22. The second rotation shaft 72 can rotate relative to the hole wall of the rotation shaft hole 3231 of the second movable end 323 of the second connecting member 32.

[0239] In the embodiment, the second movable end 323 of the second connecting member 32 is rotationally connected to the second fixed frame 22 through a physical shaft. At this time, the connection between the second movable end 323 of the second connecting member 32 and the second fixed frame 22 is reliable, the virtual rotation position is small, and the rotation action is accurate and stable.

[0240] In other embodiments, the second movable end 323 of the second connecting member 32 can also be rotationally connected to the second fixed frame 22 through other rotation modes. For example, the second movable end 323 of the second connecting member 32 and the second fixed frame 22 can be rotationally connected through an arc-shaped block and an arc-shaped groove, i.e., the second movable end 323 of the second connecting member 32 and the second fixed frame 22 can be rotationally connected through a virtual shaft. It can be understood that the structure of rotationally connected through a virtual shaft is simple, occupies small space, and is conducive to reducing the thickness of the folding mechanism 100, so that the folding mechanism 100 and the electronic device are more easily realized to be light and thin.

[0241] In other embodiments, the connection mode of the second movable end 323 of the second connecting member 32 and the second fixed frame 22 is not limited to rotationally connected. For example, the second movable end 323 of the second connecting member 32 and the second fixed frame 22 can also be slidably connected. The specific embodiments are not limited herein.

[0242] FIG. 25 is a partial cross-sectional view of an embodiment of the electronic device 1000 shown in FIG. 5 at line I-I. FIG. 26 is an enlarged view of an embodiment of the electronic device 1000 shown in FIG. 4 at M2.

[0243] Referring to FIGS. 25 and 26, and in combination with FIGS. 21 to 24, the first fixed frame 21 can be fixedly connected to the first housing 300. The second fixed frame 22 can be fixedly connected to the second housing 400. Exemplarily, the first fixed frame 21 can be connected to the first housing 300 by the first fastener 101. The second fixed frame 22 can be connected to the second housing 400 by the second fastener 102. The first fastener 101 includes, but is not limited to, a screw, a bolt, a rivet, a pin, etc. The second fastener 102 includes, but is not limited to, a screw, a bolt, a rivet, a pin, etc. It can be understood that, since the first fixed frame 21 can be fixedly connected to the first housing 300, the first housing 300 can move with the first fixed frame 21, and the folding mechanism 100 can control the movement trajectory of the first housing 300 by controlling the movement trajectory of the first fixed frame 21. In addition, since the second fixed frame 22 can be fixedly connected to the second housing 400, the second housing 400 can move with the second fixed frame 22, and the folding mechanism 100 can control the movement trajectory of the second housing 400 by controlling the movement trajectory of the second fixed frame 22.

[0244] In an embodiment, when the first connecting member 31 rotates relative to the main shaft 1, it can pull the first fixed frame 21 back to be close to the main shaft 1, and can also push the first fixed frame 21 out to be away from the main shaft 1. When the first connecting member 31 cooperates with other connecting members (for example, the third connecting member 33 shown in FIG. 7), it can drive the first housing 300 to realize the inward pulling and outward pushing movement. In addition, when the second connecting member 32 rotates relative to the main shaft 1, it can pull the second fixed frame 22 back to be close to the main shaft 1, and can also push the second fixed frame 22 out to be away from the main shaft 1. When the second connecting member 32 cooperates with other connecting members (for example, the fourth connecting member 34 shown in FIG. 7), it can drive the second housing 400 to realize the inward pulling and outward pushing movement.

[0245] It can be understood that when the electronic device 1000 switches from the unfolded state to the folded state, the first shell 300 and the second shell 400 are close to each other, the first shell 300 can drive the first fixed frame 21 to rotate relative to the main shaft 1 through the first connecting piece 31, and the second shell 400 can drive the second fixed frame 22 to rotate relative to the main shaft 1 through the second connecting piece 32. During the process of unfolding the first shell 300 and the second shell 400, the first fixed frame 21 can drive the first shell 300 to move away from the main shaft 1, and the second fixed frame 22 can drive the second shell 400 to move away from the main shaft 1. That is, the folding mechanism 100 can realize the in-shell pulling movement during the process of changing from the unfolded state to the folded state, and the out-of-shell pushing movement during the process of changing from the folded state to the unfolded state. Therefore, during the unfolding or folding process, the folding mechanism 100 can reduce the risk of pulling or pressing the flexible screen 200, thereby protecting the flexible screen 200, improving the reliability of the flexible screen 200, and prolonging the service life of the flexible screen 200 and the electronic device 1000.

[0246] In other embodiments, when the folding mechanism 100 does not include the first fixed frame 21, the first movable end 313 of the first connecting piece 31 can also be directly connected to the first shell 300. When the folding mechanism 100 does not include the second fixed frame 22, the second movable end 323 of the second connecting piece 32 can also be directly connected to the second shell 400.

[0247] The foregoing describes the structure of the main shaft 1, the structure of the first connecting piece 31, and the structure of the second connecting piece 32 in detail in combination with the related drawings. In the following, several structures of the main shaft 1 will be described in detail in combination with the related drawings. It can be understood that the same technical content as the foregoing will not be described again.

[0248] FIG. 27 is a structural schematic diagram of another embodiment of the main shaft 1 shown in FIG. 7. FIG. 28 is a structural schematic diagram of the main shaft 1 shown in FIG. 27 from another angle. FIG. 29 is a structural schematic diagram of the main shaft 1 shown in FIG. 27 from still another angle.

[0249] As shown in FIGS. 27-28, the main shaft 1 further includes a first reinforcing block 171. The first reinforcing block 171 is located in the first through hole 161 and is fixedly connected to the hole wall of the first through hole 161. At least part of the first reinforcing block 171 is arranged opposite the second curved surface 121 of the first protrusion 12.

[0250] Exemplarily, the first reinforcing block 171 can be an integral molded structure with the main shaft body 11, the first protrusion 12, the second protrusion 13, the third protrusion 14, and the fourth protrusion 15.

[0251] It can be understood that the structural strength of the main shaft 1 is greatly improved by fixing the first reinforcing block 171 to the hole wall of the first through hole 161, so as to solve the problem of reduced structural strength caused by the first through hole 161, and thus greatly improve the reliability of the main shaft 1.

[0252] FIG. 30 is a partial cross-sectional view of an embodiment of the main shaft 1 shown in FIG. 27 at the J1-J1 line. FIG. 31 is a partial cross-sectional view of an embodiment of the main shaft 1 shown in FIG. 28 at the J2-J2 line.

[0253] Referring to FIGS. 30 and 31, in combination with FIGS. 27 to 28, the first reinforcing block 171 includes a first ejection surface 1711. The first ejection surface 1711 is arranged opposite to the second curved surface 121 of the main shaft 1. The first ejection surface 1711 is arranged at an acute angle with the bottom surface 112 of the main shaft 1. The first ejection surface 1711 and the bottom surface 112 of the main shaft 1 are closer to each other in a direction away from the central axis of the main shaft 1.

[0254] It can be understood that the first ejection surface 1711 is arranged at an acute angle with the bottom surface 112 of the main shaft 1, and the first ejection surface 1711 and the bottom surface 112 of the main shaft 1 are closer to each other in a direction away from the central axis of the main shaft 1, so that after the second curved surface 121 of the main shaft 1 is formed, the mold can be ejected along a direction parallel to the first ejection surface 1711 (shown by a straight line with a thickened arrow in FIGS. 30 and 31). The ejection direction can be any direction between the positive direction of the X-axis and the negative direction of the Z-axis. Therefore, the present embodiment can adopt a side surface inclined slide block ejection mode. The main shaft 1 of the present embodiment does not need to avoid the slide block in a large area, and can guarantee the strength of the main shaft 1. In other words, while the first reinforcing block 171 is arranged to improve the structural strength of the main shaft 1, it can also ensure that the mold can be easily taken out after the second curved surface 121 of the main shaft 1 is formed.

[0255] In other embodiments, the first ejection surface 1711 can also adopt other shapes.

[0256] As shown in FIGS. 27 to 31, the main shaft 1 further includes a second reinforcing block 172. The second reinforcing block 172 is located in the second through hole 162 and is fixedly connected to the hole wall of the second through hole 162. At least part of the second reinforcing block 172 is arranged opposite to the third curved surface 131 of the second protrusion 13. In this way, the second reinforcing block 172 can further improve the structural strength of the main shaft 1, so as to solve the problem of reduced structural strength caused by the second through hole 162, and thus greatly improve the reliability of the main shaft 1. It can be understood that the second reinforcing block 172 and the main shaft body 11 are an integral structure.

[0257] In addition, the second reinforcing block 172 comprises a second die face 1721. The second die face 1721 is oppositely arranged with the third arc face 131 of the main shaft 1. The arrangement of the second die face 1721 can refer to the arrangement of the first die face 1711. For example, the second die face 1721 is arranged at an acute angle with the bottom face 112 of the main shaft 1, and the second die face 1721 and the bottom face 112 of the main shaft 1 are close to each other in the direction away from the central axis of the main shaft 1. Details are not repeated here.

[0258] As shown in FIGS. 27-31, the main shaft 1 further comprises a third reinforcing block 173. The third reinforcing block 173 is located in the third through hole 163 and is fixedly connected to the hole wall of the third through hole 163. At least part of the third reinforcing block 173 is oppositely arranged with the fifth arc face 141 of the third protrusion 14. In this way, the third reinforcing block 173 can further improve the structural strength of the main shaft 1 to solve the problem of reduced structural strength caused by the third through hole 163, thereby greatly improving the reliability of the main shaft 1. It can be understood that the third reinforcing block 173 and the main shaft body 11 are an integral structure.

[0259] In addition, the third reinforcing block 173 comprises a third die face 1731. The third die face 1731 is oppositely arranged with the fifth arc face 141 of the main shaft 1. The arrangement of the third die face 1731 can refer to the arrangement of the first die face 1711. For example, the third die face 1731 is arranged at an acute angle with the bottom face 112 of the main shaft 1, and the third die face 1731 and the bottom face 112 of the main shaft 1 are close to each other in the direction away from the central axis of the main shaft 1. Details are not repeated here.

[0260] As shown in FIGS. 27-31, the main shaft 1 further comprises a fourth reinforcing block 174. The fourth reinforcing block 174 is located in the fourth through hole 164 and is fixedly connected to the hole wall of the fourth through hole 164. At least part of the fourth reinforcing block 174 is oppositely arranged with the sixth arc face 151 of the fourth protrusion 15. In this way, the fourth reinforcing block 174 can further improve the structural strength of the main shaft 1 to solve the problem of reduced structural strength caused by the fourth through hole 164, thereby greatly improving the reliability of the main shaft 1. It can be understood that the fourth reinforcing block 174 and the main shaft body 11 are an integral structure.

[0261] In addition, the fourth reinforcing block 174 comprises a fourth die face 1741. The fourth die face 1741 is oppositely arranged with the sixth arc face 151 of the main shaft 1. The arrangement of the fourth die face 1741 can refer to the arrangement of the third die face 1731. For example, the fourth die face 1741 is arranged at an acute angle with the bottom face 112 of the main shaft 1, and the fourth die face 1741 and the bottom face 112 of the main shaft 1 are close to each other in the direction away from the central axis of the main shaft 1. Details are not repeated here.

[0262] Fig. 32 is an assembly view of the main shaft 1 and the first connecting member 31 and the second connecting member 32 of one embodiment shown in Fig. 27. Fig. 33 is a partial cross-sectional view of the partial folding mechanism 100 of one embodiment shown in Fig. 32 at the line J3-J3. Fig. 34 is a partial cross-sectional view of the partial folding mechanism 100 shown in Fig. 33 in a closed state.

[0263] As shown in Figs. 32 to 34, and in conjunction with Figs. 30 and 31, when the first rotating end 311 of the first connecting member 31 is rotationally connected to the main shaft 1, a portion of the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 is located between the first protrusion 12 of the main shaft 1 and the first draft surface 1711 of the first reinforcing block 171.

[0264] Exemplarily, when the folding mechanism 100 is in the unfolded state, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be spaced apart from the first draft surface 1711 of the first reinforcing block 171. In other embodiments, when the folding mechanism 100 is in the unfolded state, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be in contact with the first draft surface 1711 of the first reinforcing block 171. The specific embodiments are not limited here.

[0265] Exemplarily, when the folding mechanism 100 is in the closed state, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be spaced apart from the first draft surface 1711 of the first reinforcing block 171. In other embodiments, when the folding mechanism 100 is in the closed state, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be in contact with the first draft surface 1711 of the first reinforcing block 171. The specific embodiments are not limited here.

[0266] As shown in Figs. 32 to 34, and in conjunction with Figs. 30 and 31, when the first rotating end 311 of the first connecting member 31 is rotationally connected to the main shaft 1, a portion of the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 is located between the second protrusion 13 of the main shaft 1 and the second draft surface 1721 of the second reinforcing block 172.

[0267] It can be understood that the positional relationship of the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 and the second draft surface 1721 of the second reinforcing block 172 can refer to the positional relationship of the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 and the first draft surface 1711. The specific embodiments are not described here.

[0268] As shown in FIGS. 32-34, and in conjunction with FIGS. 30 and 31, when the second rotating end 321 of the second connecting member 32 is rotationally connected to the main shaft 1, a portion of the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 is located between the third protrusion 14 and the third reinforcing block 173 of the main shaft 1.

[0269] It can be understood that the positional relationship between the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 and the third die surface 1731 of the third reinforcing block 173 can refer to the positional relationship between the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 and the first die surface 1711. Details are not repeated here.

[0270] As shown in FIGS. 32-34, and in conjunction with FIGS. 30 and 31, when the second rotating end 321 of the second connecting member 32 is rotationally connected to the main shaft 1, a portion of the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 is located between the fourth protrusion 15 and the fourth reinforcing block 174 of the main shaft 1.

[0271] It can be understood that the positional relationship between the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 and the fourth die surface 1741 of the fourth reinforcing block 174 can refer to the positional relationship between the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 and the first die surface 1711. Details are not repeated here.

[0272] In the following, several structures of the main shaft 1 will be further described in detail in conjunction with the relevant drawings. It can be understood that the same technical content as the foregoing will not be repeated here.

[0273] FIG. 35 is a structural schematic diagram of another embodiment of the main shaft 1 shown in FIG. 7. FIG. 36 is a structural schematic diagram of the main shaft 1 shown in FIG. 35 from another angle. FIG. 37 is a partial sectional view of the main shaft 1 shown in FIG. 35 from the K-K line.

[0274] As shown in FIGS. 35-37, for example, the first die surface 1711 is arranged parallel to the bottom surface 112 of the main shaft 1.

[0275] It can be understood that, compared with the scheme that the first ejection surface 1711 is arranged at an acute angle with the bottom surface 112 of the main shaft 1, the first ejection surface 1711 is arranged parallel to the bottom surface 112 of the main shaft 1 in the embodiment, which can make the overall volume of the first reinforcing block 171 larger, thereby further reducing the large-area avoidance slider, and further guaranteeing the strength of the main shaft 1. On the other hand, after the second curved surface 121 of the main shaft 1 is formed, the mold can be ejected along a direction parallel to the first ejection surface 1711 (for example, the ejection direction can be the positive direction of the X axis, which is shown by a straight line with a thickened arrow in FIG. 37), and ejected through the first through hole 161. Therefore, the horizontal slider ejection mode can be adopted in the embodiment. The ejection mode of the embodiment is relatively simple, and the mold can be conveniently taken out.

[0276] As shown in FIGS. 35 to 37, similarly, the second ejection surface 1721 can also be arranged parallel to the bottom surface 112 of the main shaft 1. In this way, while the second reinforcing block 172 is arranged to improve the structural strength of the main shaft 1, it can also be ensured that after the third curved surface 131 of the main shaft 1 is formed, the mold can be ejected along a direction parallel to the second ejection surface 1721, and the mold can be conveniently taken out.

[0277] As shown in FIGS. 35 to 37, similarly, the third ejection surface 1731 can also be arranged parallel to the bottom surface 112 of the main shaft 1. In this way, while the third reinforcing block 173 is arranged to improve the structural strength of the main shaft 1, it can also be ensured that after the fifth curved surface 141 of the main shaft 1 is formed, the mold can be ejected along a direction parallel to the third ejection surface 1731, and the mold can be conveniently taken out.

[0278] As shown in FIGS. 35 to 37, similarly, the fourth ejection surface 1741 can also be arranged parallel to the bottom surface 112 of the main shaft 1. In this way, while the fourth reinforcing block 174 is arranged to improve the structural strength of the main shaft 1, it can also be ensured that after the sixth curved surface 151 of the main shaft 1 is formed, the mold can be ejected along a direction parallel to the fourth ejection surface 1741, and the mold can be conveniently taken out.

[0279] FIG. 38 is an assembly schematic view of the main shaft 1 and the first connecting piece 31 and the second connecting piece 32 according to an embodiment shown in FIG. 35. FIG. 39 is a partial cross-sectional view of the partial folding mechanism 100 according to an embodiment shown in FIG. 38 at L-L line. FIG. 40 is a partial cross-sectional view of the partial folding mechanism 100 according to an embodiment shown in FIG. 39 in a closed state.

[0280] As shown in FIGS. 38-40, and in conjunction with FIGS. 35-37, exemplary, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be spaced apart from the first mold exit surface 1711 of the first reinforcing block 171 when the folding mechanism 100 is in the unfolded state. In other embodiments, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be in contact with the first mold exit surface 1711 of the first reinforcing block 171 when the folding mechanism 100 is in the unfolded state. The present embodiments are not limited in this regard.

[0281] As shown in FIGS. 38-40, and in conjunction with FIGS. 35-37, exemplary, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be spaced apart from the first mold exit surface 1711 of the first reinforcing block 171 when the folding mechanism 100 is in the unfolded state. In other embodiments, the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 can be in contact with the first mold exit surface 1711 of the first reinforcing block 171 when the folding mechanism 100 is in the unfolded state. The present embodiments are not limited in this regard.

[0282] It can be understood that the positional relationship between the second protrusion 3113 of the first rotating end 311 of the first connecting member 31 and the second mold exit surface 1721 of the second reinforcing block 172, the positional relationship between the third protrusion 3212 of the second rotating end 321 of the second connecting member 32 and the third mold exit surface 1731 of the third reinforcing block 173, and the positional relationship between the fourth protrusion 3213 of the second rotating end 321 of the second connecting member 32 and the fourth mold exit surface 1741 of the fourth reinforcing block 174 can all be referred to the positional relationship between the first protrusion 3112 of the first rotating end 311 of the first connecting member 31 and the first mold exit surface 1711. Details are not repeated here.

[0283] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict, and any combination of features in different embodiments is also within the protection scope of the present application, that is, the above-described multiple embodiments can also be combined as needed.

[0284] It should be noted that all the above-mentioned drawings are exemplary drawings of the present application, and do not represent the actual size of the product. The size ratio relationship between the components in the drawings is not limited to the actual product of the present application. The above are only some embodiments and embodiments of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A main shaft (1) characterized in that, The main shaft (1) is a one-piece structure, the main shaft (1) comprises a main shaft body (11), a first protrusion (12) and a second protrusion (13); The main shaft body (11) comprises a top surface (111) and a bottom surface (112) arranged oppositely, and is provided with an inner space (110), the inner space (110) is open at the top surface (111) of the main shaft body (11), and the inner space (110) comprises a bottom wall (1101) and first and second side walls (1102 and 1103) arranged oppositely, and the bottom wall (1101) is connected to the first and second side walls (1102 and 1103); The bottom wall (1101) comprises a first arc surface (117); The first protrusion (12) is protruded from the first side wall (1102) and is arranged spaced apart from the bottom wall (1101), and a surface of the first protrusion (12) facing the bottom surface (112) of the main shaft body (11) comprises a second arc surface (121); The second protrusion (13) is protruded from the second side wall (1103) and is arranged spaced apart from the bottom wall (1101), and a surface of the second protrusion (13) facing the bottom surface (112) of the main shaft body (11) comprises a third arc surface (131); The second arc surface (121) of the main shaft (1), the first arc surface (117) of the main shaft (1) and the third arc surface (131) of the main shaft (1) are sequentially arranged spaced apart in a first direction, and in a second direction, the second arc surface (121) of the main shaft (1) and the first arc surface (117) of the main shaft (1) have a height difference, and the third arc surface (131) of the main shaft (1) and the first arc surface (117) of the main shaft (1) have a height difference, and the second direction is different from the first direction.

2. Spindle (1) according to claim 1, characterized in that The main shaft body (11) is provided with a first through hole (161), the first through hole (161) is open at the bottom surface (112) of the main shaft body (11) and the bottom wall (1101), and at least part of the first through hole (161) is arranged opposite to the second arc surface (121) of the main shaft (1); And / or, the main shaft body (11) is provided with a second through hole (162), the second through hole (162) is open at the bottom surface (112) of the main shaft body (11) and the bottom wall (1101), and at least part of the second through hole (162) is arranged opposite to the third arc surface (131) of the main shaft (1).

3. Spindle (1) according to claim 2, characterized in that The main shaft (1) comprises a first reinforcing block (171), the first reinforcing block (171) is located in the first through hole (161) and is fixedly connected to the hole wall of the first through hole (161), and at least part of the first reinforcing block (171) is arranged opposite to the second arc surface (121) of the main shaft (1); And / or, the main shaft (1) comprises a second reinforcing block (172), the second reinforcing block (172) is located in the second through hole (162), and is fixedly connected to the hole wall of the second through hole (162), at least part of the second reinforcing block (172) is arranged opposite to the third arc surface (131) of the main shaft (1).

4. Spindle (1) according to claim 3, characterized in that The first reinforcing block (171) comprises a first ejection surface (1711), the first ejection surface (1711) is arranged opposite to the second arc surface (121) of the main shaft (1), the first ejection surface (1711) is arranged at an acute angle with the bottom surface (112) of the main shaft (1), and the first ejection surface (1711) and the bottom surface (112) of the main shaft (1) are close to each other in the direction away from the central axis of the main shaft (1), or the first ejection surface (1711) is arranged parallel to the bottom surface (112) of the main shaft (1); And / or, the second reinforcing block (172) comprises a second ejection surface (1721), the second ejection surface (1721) is arranged opposite to the third arc surface (131) of the main shaft (1), the second ejection surface (1721) is arranged at an acute angle with the bottom surface (112) of the main shaft (1), and the second ejection surface (1721) and the bottom surface (112) of the main shaft (1) are close to each other in the direction away from the central axis of the main shaft (1), or the second ejection surface (1721) is arranged parallel to the bottom surface (112) of the main shaft (1).

5. Spindle (1) according to any one of claims 1 to 4, characterized in that The axis of the second arc surface (121) of the main shaft (1), the axis of the first arc surface (117) of the main shaft (1) and the axis of the third arc surface (131) of the main shaft (1) are on the same straight line.

6. Spindle (1) according to any one of claims 1 to 5, characterized in that The inner side space (110) further comprises a third side wall (1104) and a fourth side wall (1105) arranged opposite to each other, and the bottom wall (1101) connects the third side wall (1104) and the fourth side wall (1105), the third side wall (1104) and the fourth side wall (1105) are arranged at intervals from the first side wall (1102) and the second side wall (1103); The bottom wall (1101) further comprises a fourth arc surface (118), and the fourth arc surface (118) of the main shaft (1) is arranged at intervals from the first arc surface (117) of the main shaft (1); The main shaft (1) further comprises a third protruding block (14) and a fourth protruding block (15); The third protruding block (14) is protruded on the third side wall (1104) and arranged at intervals from the bottom wall (1101), and the surface of the third protruding block (14) facing the bottom surface (112) of the main shaft body (11) comprises a fifth arc surface (141); The fourth protruding block (15) is protruded on the fourth side wall (1105) and arranged at intervals from the bottom wall (1101), and the surface of the fourth protruding block (15) facing the bottom surface (112) of the main shaft body (11) comprises a sixth arc surface (151); The fifth arc surface (141) of the main shaft (1), the fourth arc surface (118) of the main shaft (1) and the sixth arc surface (151) of the main shaft (1) are sequentially arranged along the first direction, and the fifth arc surface (141) of the main shaft (1) and the fourth arc surface (118) of the main shaft (1) have a height difference in the second direction, and the sixth arc surface (151) of the main shaft (1) and the fourth arc surface (118) of the main shaft (1) have a height difference.

7. Spindle (1) according to claim 6, characterized in that The fourth arc surface (118) of the main shaft (1) and the first arc surface (117) of the main shaft (1) are arranged along a third direction, and the third direction is different from the first direction and the second direction; And / or, the fifth arc surface (141) of the main shaft (1) and the second arc surface (121) of the main shaft (1) are arranged along a third direction, and the third direction is different from the first direction and the second direction; And / or, the sixth arc surface (151) of the main shaft (1) and the third arc surface (131) of the main shaft (1) are arranged along a third direction, and the third direction is different from the first direction and the second direction.

8. Spindle (1) according to claim 6 or 7, characterized in that The fourth arc surface (118) of the main shaft (1) and the first arc surface (117) of the main shaft (1) are mirror-symmetric structures; and / or, the fifth arc surface (141) of the main shaft (1) and the second arc surface (121) of the main shaft (1) are mirror-symmetric structures; and / or, the sixth arc surface (151) of the main shaft (1) and the third arc surface (131) of the main shaft (1) are mirror-symmetric structures.

9. Spindle (1) according to any one of claims 6 to 8, characterized in that The axis of the fifth arc surface (141) of the main shaft (1), the fourth arc surface (118) of the main shaft (1) and the sixth arc surface (151) of the main shaft (1) are on the same straight line.

10. Spindle (1) according to any one of claims 6 to 9, characterized in that The main shaft body (11) is provided with a third through hole (163), and the third through hole (163) forms an opening on the bottom surface (112) of the main shaft body (11) and the bottom wall (1101), and at least part of the third through hole (163) is arranged opposite to the fifth arc surface (141) of the main shaft (1); And / or, the main shaft body (11) is provided with a fourth through hole (164), and the fourth through hole (164) forms an opening on the bottom surface (112) of the main shaft body (11) and the bottom wall (1101) of the inner space (110), and at least part of the fourth through hole (164) is arranged opposite to the sixth arc surface (151) of the main shaft (1).

11. Spindle (1) according to claim 10, characterized in that The main shaft (1) further comprises a third reinforcing block (173), which is located in the third through hole (163) and fixedly connected to the hole wall of the third through hole (163), and at least part of the third reinforcing block (173) is arranged opposite to the fifth arc surface (141) of the main shaft (1); And / or, the main shaft (1) further comprises a fourth reinforcing block (174), the fourth reinforcing block (174) is located in the fourth through hole (164) and is fixedly connected to the hole wall of the fourth through hole (164), and at least part of the fourth reinforcing block (174) is arranged opposite to the sixth arc surface (151) of the main shaft (1).

12. Spindle (1) according to claim 11, characterized in that The third reinforcing block (173) comprises a third parting surface (1731), the third parting surface (1731) is arranged opposite to the fifth arc surface (141) of the main shaft (1), the third parting surface (1731) is arranged at an acute angle with the bottom surface (112) of the main shaft (1), and the third parting surface (1731) and the bottom surface (112) of the main shaft (1) are close to each other in a direction away from the central axis of the main shaft (1), or the third parting surface (1731) is arranged parallel to the bottom surface (112) of the main shaft (1). And / or, the fourth reinforcing block (174) comprises a fourth parting surface (1741), the fourth parting surface (1741) is arranged opposite to the sixth arc surface (151) of the main shaft (1), the fourth parting surface (1741) is arranged at an acute angle with the bottom surface (112) of the main shaft (1), and the fourth parting surface (1741) and the bottom surface (112) of the main shaft (1) are close to each other in a direction away from the central axis of the main shaft (1), or the fourth parting surface (1741) is arranged parallel to the bottom surface (112) of the main shaft (1).

13. Spindle (1) according to any one of claims 1 to 12, characterized in that The first direction is the length direction of the main shaft (1), and the second direction is the thickness direction of the main shaft (1).

14. A folding mechanism (100) characterized by, The main shaft (1) comprises a first connecting piece (31); The first connecting piece (31) comprises a first rotating end (311), the first rotating end (311) of the first connecting piece (31) comprises a first body portion (3111), a first protruding portion (3112) and a second protruding portion (3113), the first body portion (3111) of the first rotating end (311) of the first connecting piece (31) comprises a top surface (3114) and a bottom surface (3115) arranged in opposite directions, and a first side surface (3116) and a second side surface (3117) arranged in opposite directions, the first side surface (3116) and the second side surface (3117) of the first body portion (3111) of the first rotating end (311) of the first connecting piece (31) are connected between the top surface (3114) and the bottom surface (3115) of the first body portion (3111) of the first rotating end (311) of the first connecting piece (31); The bottom surface (3115) of the first body portion (3111) of the first rotating end (311) of the first connecting piece (31) comprises a first arc surface (314); The first protruding part (3112) of the first rotating end (311) of the first connecting piece (31) protrudes from the first side surface (3116) of the first body part (3111) of the first rotating end (311) of the first connecting piece (31), and the first protruding part (3112) of the first rotating end (311) of the first connecting piece (31) comprises a second arc surface (315) which is located on the same side as the top surface (3114) of the first body part (3111) of the first rotating end (311) of the first connecting piece (31); The second protruding part (3113) of the first rotating end (311) of the first connecting piece (31) protrudes from the second side surface (3117) of the first body part (3111) of the first rotating end (311) of the first connecting piece (31), and the second protruding part (3113) of the first rotating end (311) of the first connecting piece (31) comprises a third arc surface (316) which is located on the same side as the top surface (3114) of the first body part (3111) of the first rotating end (311) of the first connecting piece (31); The first body part (3111) of the first rotating end (311) of the first connecting piece (31) is located in the inner space (110) of the main shaft (1) and between the first protruding block (12) and the second protruding block (13) of the main shaft (1), a part of the first protruding part (3112) of the first rotating end (311) of the first connecting piece (31) is located between the first protruding block (12) of the main shaft (1) and the main shaft body (11), and a part of the second protruding part (3113) of the first rotating end (311) of the first connecting piece (31) is located between the second protruding block (13) of the main shaft (1) and the main shaft body (11); The first arc surface (314) of the first rotating end (311) of the first connecting piece (31) is in contact with the first arc surface (117) of the main shaft (1) and can move relative to each other, the second arc surface (315) of the first rotating end (311) of the first connecting piece (31) is in contact with the second arc surface (121) of the main shaft (1) and can move relative to each other, and the third arc surface (316) of the first rotating end (311) of the first connecting piece (31) is in contact with the third arc surface (131) of the main shaft (1) and can move relative to each other.

15. The folding mechanism (100) according to claim 14, characterized in that The folding mechanism (100) further comprises a first fixed frame (21), and the first connecting piece (31) comprises a first movable end (313) which is movably connected to the first fixed frame (21).

16. An electronic device (1000), characterized by The folding mechanism (100) is connected with the first shell (300) and the second shell (400) to unfold or fold the first shell (300) and the second shell (400), wherein the first connecting piece 31 of the folding mechanism (100) is connected with the first shell (300).

17. The electronic device (1000) according to claim 16, characterized by, The electronic device (1000) comprises a flexible screen (200), the flexible screen (200) comprises a first display area (201), a second display area (202) and a third display area (203) connected in sequence, the first display area (201) is fixed on the first shell (300), and the third display area (203) is fixed on the second shell (400).

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