Rotating mechanism and foldable electronic equipment

Abstract

The invention provides a rotating mechanism and foldable electronic equipment. The rotating mechanism comprises a first swing arm group, a bearing base and a first door plate, the first swing arm group comprises a first main swing arm and a second main swing arm, the first main swing arm comprises a first main sliding part, and the second main swing arm comprises a second main sliding part; the first door plate is provided with a first supporting face, and the first supporting face is provided with a first arc-shaped groove. The center axes of the first arc-shaped groove, the first main sliding part and the second main sliding part coincide, the length size of the first arc-shaped groove is larger than the width size of the first main sliding part, the length size of the first arc-shaped groove is larger than the width size of the second main sliding part, and when the rotating mechanism is in a folded state, the bendable part of the display screen is bent into an arc shape; and the first arc-shaped groove is used for accommodating one part of the bendable part. The first arc-shaped groove increases the inner side space when the foldable electronic equipment is in a folded state, increases the screen accommodating space, and reduces the risk of failure of the whole display screen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to a rotating mechanism and a foldable electronic device. BACKGROUND

[0002] With the development of science and technology, various electronic devices have become indispensable products in daily life and production. Among them, foldable electronic devices have gradually become a development trend because of their large display area and portability.

[0003] However, users are increasingly demanding foldable electronic devices to be thinner and lighter, but the higher the degree of thinness and lightness, the worse the anti-drop ability. When the foldable electronic device is subjected to a drop impact, the display screen will be squeezed, and the worse the anti-drop ability, the more serious the damage to the display screen, and even the display screen may fail. SUMMARY

[0004] The present application provides a rotating mechanism and a foldable electronic device, which improves the anti-drop ability of the foldable electronic device and reduces the risk of display screen failure.

[0005] The first aspect of the present application provides a rotating mechanism, which is applied to a foldable electronic device. The foldable electronic device further includes a first housing, a second housing, and a display screen. The rotating mechanism includes a first swing arm group, a bearing base, and a first door plate. The first swing arm group includes a first main swing arm and a second main swing arm. The first main swing arm includes a first main sliding part, a first connecting part, and a first rotating part fixed in sequence, and the second main swing arm includes a second main sliding part, a second connecting part, and a second rotating part fixed in sequence.

[0006] The first main swing arm and the second main swing arm are arranged on opposite sides of the bearing base, and the first main sliding part and the second main sliding part are both slidingly connected to the bearing base. The first rotating part is rotationally connected to the first housing, and the second rotating part is rotationally connected to the second housing.

[0007] The first door plate is fixed in layers with the bearing base in the thickness direction of the rotating mechanism. The side of the first door plate away from the bearing base is provided with a first supporting surface, and the first supporting surface is provided with a first arc-shaped groove. The central axes of the first arc-shaped groove, the first main sliding part, and the second main sliding part all coincide, and the central axes are parallel to the width direction of the rotating mechanism. The length dimension A of the first arc-shaped groove is greater than the width dimension B of the first main sliding part, and the length dimension A of the first arc-shaped groove is greater than the width dimension C of the second main sliding part. The length direction of the first arc-shaped groove, the width direction of the first main sliding part, and the width direction of the second main sliding part are all parallel to the length direction of the rotating mechanism.

[0008] The display screen is arranged in the first shell, the rotating mechanism and the second shell, and the bendable part of the display screen is stacked with the rotating mechanism along the thickness direction of the foldable electronic device. When the foldable electronic device is in the unfolded state, the first shell and the second shell are unfolded relative to each other, and the bendable part of the display screen is unfolded. When the foldable electronic device is in the folded state, the first shell and the second shell are folded relative to each other, and the bendable part of the display screen is bent into a drop shape, that is, the bendable part is in an arc shape. A part of the bendable part corresponding to the first main swing arm and the second main swing arm is located in the first arc-shaped groove.

[0009] To meet the strength requirements of the first main swing arm and the second main swing arm and reduce the risk of breakage of the first main swing arm and the second main swing arm, the thickness of the first connecting part and the second connecting part is relatively large. Therefore, when the foldable electronic device is folded, the first connecting part and the second connecting part occupy part of the inner space of the foldable electronic device, resulting in a decrease in the space reserved for the bendable part, that is, a decrease in the screen space. When the foldable electronic device is in the folded state and falls, the bendable part deforms towards the first connecting part and the second connecting part. Because the screen space is too small, the bendable part can be squeezed by the first connecting part, the second connecting part and the first supporting surface, and then the part of the bendable part corresponding to the first main swing arm and the second main swing arm can be dead folded, which can cause the curved display screen to fail, and finally can cause the entire display screen to fail.

[0010] In this application, the first arc-shaped groove increases the inner space when the foldable electronic device is in the folded state, thereby providing a larger space for the part of the bendable part corresponding to the first main swing arm and the second main swing arm, that is, increasing the screen space, improving the anti-falling ability of the foldable electronic device, reducing the stress concentration phenomenon, reducing the risk of failure of the bendable part being squeezed, and finally reducing the risk of failure of the entire display screen.

[0011] In some embodiments, along the length direction of the rotating mechanism, the center axis of the first arc-shaped groove and the first supporting surface coincide. Thus, the center axis of the first arc-shaped groove and the center axis of the rotating mechanism coincide, so that the bendable part on both sides of the symmetry axis can occupy the same screen space, preventing the screen space reserved for both sides of the bendable part from being inconsistent, which can cause the display screen to be squeezed.

[0012] In some embodiments, the first supporting surface further has a transition groove recessed therein. Along the length direction of the rotating mechanism, the transition groove communicates with the first arc-shaped groove, and the depth of the transition groove gradually changes, so that the first arc-shaped groove and the first supporting surface smoothly transition. This prevents a gap between the first arc-shaped groove and the first supporting surface, and prevents the display screen from being dead folded due to the gap.

[0013] In some embodiments, the first door plate comprises an end portion and a middle portion, and the end portion and the middle portion are connected along the length direction of the rotating mechanism. The first arc-shaped slot is located at the end portion. The width of the first arc-shaped slot gradually increases from the middle portion to the end portion. The first door plate comprises two end portions, which are a first end portion and a second end portion respectively. The first end portion, the middle portion and the second end portion are sequentially connected along the length direction of the rotating mechanism. The first arc-shaped slot can be located at the first end portion and / or the second end portion.

[0014] The width of the first arc-shaped slot gradually increases, specifically, the first arc-shaped slot is located at the end portion of the first door plate. The first arc-shaped slot comprises a first edge, a second edge, a third edge and a fourth edge. The first edge and the second edge are opposite to each other along the length direction of the rotating mechanism. The third edge and the fourth edge are opposite to each other along the width direction of the rotating mechanism. The first edge, the third edge, the second edge and the fourth edge are sequentially connected. The first edge is located at one side of the end portion away from the middle portion, and the second edge is located at one side of the end portion close to the middle portion. The distance between the third edge and the fourth edge gradually increases from the second edge to the first edge, and the width of the first arc-shaped slot gradually increases. That is, the first arc-shaped slot is the widest at the first edge and the narrowest at the second edge, and gradually narrows from the first edge to the second edge.

[0015] The gradually changing width of the first arc-shaped slot can uniformly disperse stress, reduce stress concentration, thereby reducing the failure risk of the bendable portion, and can also make the first supporting surface have a larger area, so that when the foldable electronic device is in the unfolded state, the display screen can be better supported, the touch feeling can be improved, the crease can be reduced, and the user experience can be improved.

[0016] In addition, when the foldable electronic device is in the folded state, if the foldable electronic device is tilted and falls, and any one end of the bearing base is the stress point, it is called a small-angle head-tail fall, which is referred to as an angle fall. If the first arc-shaped slot is not provided, and the foldable electronic device appears the angle fall, the bendable portion is most easily extruded at the position corresponding to the stress point, and the part of the bendable portion that is most easily extruded is referred to as a vulnerable part. The vulnerable part of the bendable portion corresponds to one end of the end portion of the first door plate away from the middle portion.

[0017] From the width change of the first arc-shaped slot at the end portion, it can be known that when the foldable electronic device appears the angle fall, the widest position of the first arc-shaped slot at the end portion is opposite to the vulnerable part of the bendable portion, so that the screen accommodating space provided for the bendable portion increases the most, the vulnerable part of the bendable portion is prevented from being dead-folded, the failure risk of the vulnerable part of the bendable portion is reduced, and finally the failure risk of the entire display screen is reduced.

[0018] In some embodiments, the first support surface further comprises a first transition groove, and the first transition groove is configured to accommodate a portion of the bendable portion when the rotating mechanism is in the folded state. The first transition groove is located on a side of the first arc-shaped groove close to the middle portion along the length direction of the rotating mechanism, the center axis of the first transition groove and the first arc-shaped groove coincide, the depth of the first transition groove gradually decreases, the deepest position of the first transition groove is in communication with the first arc-shaped groove, and the depth of the deepest position of the first transition groove is the same as that of the first arc-shaped groove. The first transition groove can make the side of the first arc-shaped groove close to the middle portion and the first support surface smoothly transition, prevent the first edge of the first arc-shaped groove from having a groove side perpendicular to the first support surface, and prevent the bendable portion from being dead-folded.

[0019] In some embodiments, the width of the first transition groove gradually decreases. The widest position of the first transition groove is in communication with the narrowest position of the first arc-shaped groove, and the width of the widest position of the first transition groove is the same as that of the narrowest position of the first arc-shaped groove. This can prevent the first transition groove from occupying too much space, so that the first support surface has sufficient area to support the bendable portion.

[0020] In some embodiments, the first support surface further comprises a second transition groove, and the second transition groove is configured to accommodate a portion of the bendable portion when the rotating mechanism is in the folded state. The second transition groove is located on a side of the first arc-shaped groove away from the middle portion along the length direction of the rotating mechanism, the second transition groove penetrates through the end surface of the end portion away from the middle portion, the center axis of the second transition groove and the first arc-shaped groove coincide, the depth of the second transition groove gradually decreases, and the shallowest position of the second transition groove is in communication with the first arc-shaped groove. The second transition groove can make the side of the first arc-shaped groove away from the middle portion and the first support surface smoothly transition, prevent the second edge of the first arc-shaped groove from having a groove side perpendicular to the first support surface, i.e., prevent a gap between the first arc-shaped groove and the first support surface, and further prevent the bendable portion from being dead-folded.

[0021] In some embodiments, the width of the second transition groove gradually decreases. The narrowest position of the second transition groove is in communication with the widest position of the first arc-shaped groove, and the width of the narrowest position of the second transition groove is the same as that of the widest position of the first arc-shaped groove. This can prevent the second transition groove from occupying too much space, so that the first support surface has sufficient area to support the bendable portion.

[0022] In some embodiments, the first door panel comprises an end portion and a middle portion, and the end portion and the middle portion are connected along the length direction of the rotating mechanism. The first arc-shaped groove is located in the middle portion. The width of the first arc-shaped groove gradually decreases from the center axis to one end of the first arc-shaped groove. That is, the widest position of the first arc-shaped groove is opposite to the center axis.

[0023] The width of the first arc-shaped groove gradually decreases. Specifically, the first arc-shaped groove includes a first edge, a second edge, a third edge, and a fourth edge. The first edge and the second edge are opposite to each other along the length direction of the rotating mechanism. The third edge and the fourth edge are opposite to each other along the width direction of the rotating mechanism. The first edge, the third edge, the second edge, and the fourth edge are sequentially connected. The distance between the third edge and the fourth edge gradually decreases from the central axis to the first edge, and the width of the first arc-shaped groove gradually decreases. The distance between the third edge and the fourth edge gradually decreases from the central axis to the second edge, and the width of the first arc-shaped groove gradually decreases. That is, the width of the first arc-shaped groove gradually decreases from the middle to the two ends.

[0024] The width of the first arc-shaped groove gradually changes to uniformly disperse stress, reduce stress concentration, and reduce the risk of failure of the bendable part. In addition, the first support surface has a larger area, so that the display screen can be better supported when the foldable electronic device is in an unfolded state, the touch feeling can be improved, the crease can be reduced, and the user experience can be improved.

[0025] In addition, if the middle part is not provided with the first arc-shaped groove, when the foldable electronic device is in a folded state and falls, and the side of the bearing base away from the first door panel is the stress point, the position of the bendable part corresponding to the central axis of the first arc-shaped groove along the width direction of the rotating mechanism is the vulnerable part. In this application, the widest position of the first arc-shaped groove of the middle part is opposite to the vulnerable part of the bendable part, so that the screen space provided for the bendable part is increased the most, thereby preventing the vulnerable part of the bendable part from being dead folded, reducing the risk of failure of the vulnerable part of the bendable part, and ultimately reducing the risk of failure of the entire display screen.

[0026] In some embodiments, the first support surface further comprises a third transition groove in communication with the first arc-shaped groove in the middle part along the length direction of the rotating mechanism. It can be understood that the first arc-shaped groove is provided with the third transition groove at both ends along the length direction of the rotating mechanism. When the rotating mechanism is in a folded state, the third transition groove is used to accommodate a part of the bendable part. Along the length direction of the rotating mechanism, the third transition groove coincides with the central axis of the first arc-shaped groove, and the depth of the third transition groove gradually decreases. The deepest position of the third transition groove is in communication with the first arc-shaped groove. The depth of the deepest position of the third transition groove is the same as that of the first arc-shaped groove. The third transition groove can make the first arc-shaped groove and the first support surface smoothly transition, prevent the first edge and the second edge of the first arc-shaped groove from having a groove side perpendicular to the first support surface, and prevent the bendable part from being dead folded.

[0027] In some embodiments, the third transition groove gradually decreases in width. The widest position of the third transition groove is in communication with the narrowest position of the first arc-shaped groove, and the width of the widest position of the third transition groove is the same as that of the narrowest position of the first arc-shaped groove. The third transition groove can be prevented from occupying too much space, so that the first support surface has sufficient area to support the bendable part.

[0028] In some embodiments, the arc length of the widest position of the first arc-shaped groove is L, and the radius of the circle on which the region corresponding to the widest position of the first arc-shaped groove of the bendable part is located is R when the foldable electronic device is in the folded state. L is greater than R. In this way, more space can be provided for the bendable part, the bendable part can be prevented from being crushed and failing, and the risk of failure of the entire display screen can be ultimately reduced.

[0029] In some embodiments, the arc length L and the radius R satisfy the following relationship: L = R + 0.3 mm. This can increase the screen space, prevent the screen space from occupying too much space of the first support surface, and ensure that the first support surface has sufficient area to support the display screen.

[0030] In some embodiments, the length A of the first arc-shaped groove, the width B of the first main sliding part, and the width C of the second main sliding part satisfy the following relationship: B = C = A + 0.1 mm. In this way, sufficient space can be provided for the positions corresponding to the first main swing arm and the second main swing arm of the bendable part, and the first support surface can have a larger area to better support the display screen when the foldable electronic device is in the unfolded state, so that the display screen remains flat.

[0031] In some embodiments, the first arc-shaped groove includes a first concave arc surface, the bendable part is parallel to the first concave arc surface when the rotating mechanism is in the folded state, and the bendable part and the first concave arc surface have a first gap therebetween. When the foldable electronic device falls, the bendable part can first move into the first gap, thereby buffering the impact force received by the bendable part and reducing the risk of failure of the bendable part.

[0032] In some embodiments, there are multiple first swing arm assemblies and multiple first arc-shaped slots, with each set corresponding to a specific first arc-shaped slot. The first support surface also has a second arc-shaped slot. Along the length of the rotating mechanism, any two adjacent first arc-shaped slots are provided with a second arc-shaped slot. The width of the first arc-shaped slot gradually changes, and the narrowest point of the first arc-shaped slot connects to the second arc-shaped slot. The width of the second arc-shaped slot is the same as the width of the narrowest point of the first arc-shaped slot. Multiple first arc-shaped slots and multiple second arc-shaped slots connect to form a total arc-shaped slot, which extends through the first door panel along the length of the rotating mechanism. When the rotating mechanism is in a folded state, the second arc-shaped slot is used to accommodate a portion of the bendable part. By providing the second arc-shaped slot, more space can be provided for the bendable part and other corresponding components, preventing the bendable part from folding completely. This improves the overall reliability of the display screen and reduces creases, further enhancing the reliability of the display screen.

[0033] The rotating mechanism also includes a second swing arm assembly, which comprises a first auxiliary swing arm and a second auxiliary swing arm. The first auxiliary swing arm is rotatably connected to the support base and slidably connected to the first housing, and the second auxiliary swing arm is rotatably connected to the support base and slidably connected to the second housing. Multiple second swing arm assemblies can be arranged along the length of the rotating mechanism. Along the thickness direction of the rotating mechanism, a portion of the second arc-shaped groove can be opposite to the second swing arm assembly, thereby increasing the screen space at the second swing arm assembly.

[0034] In some embodiments, the second arcuate groove includes a second concave arc surface. When the rotating mechanism is in a folded state, the bendable portion is parallel to the second concave arc surface, and a second gap exists between the bendable portion and the second concave arc surface. When the foldable electronic device is dropped, the bendable portion can first move into the second gap, thereby buffering the impact force on the bendable portion and reducing the risk of failure of the bendable portion.

[0035] In some embodiments, a buffer pad is provided within the second gap, and the buffer pad is fixed to the second concave arc surface. When the foldable electronic device is in a folded state and the supporting base is subjected to external impact force, the buffer pad can undergo compression deformation to absorb the impact force on the flexible part and prevent the flexible part from failing.

[0036] The second aspect of this application provides a foldable electronic device, including a first housing, a second housing, a display screen, and a rotating mechanism according to any one of the first aspects of this application; the display screen includes a bendable portion; the display screen is disposed in the first housing, the rotating mechanism, and the second housing; when the foldable electronic device is in a folded state, the bendable portion is in a bent state, and a portion of the bendable portion is located in a first arc-shaped groove. Attached Figure Description

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0038] Figure 1 is a structural schematic diagram of a foldable electronic device in a folded state provided by the embodiments of the present application.

[0039] Figure 2 is a structural schematic diagram of a foldable electronic device in an unfolded state provided by the embodiments of the present application.

[0040] Figure 3 is a structural schematic diagram of a main body of a foldable electronic device provided by the embodiments of the present application.

[0041] Figure 4 is a structural schematic diagram of a first shell and a second shell of the main body shown in Figure 3

[0042] is a structural schematic diagram of a rotating mechanism of the main body shown in Figure 5 Figure 3 is a structural schematic diagram of the rotating mechanism shown in

[0043] Figure 6 is a structural schematic diagram of the foldable electronic device shown in Figure 2

[0044] is a structural schematic diagram of the foldable electronic device shown in Figure 7 Figure 1 is a structural schematic diagram of the rotating mechanism shown in

[0045] Figure 8 Figure 5 is an enlarged structural schematic diagram of F of the rotating mechanism shown in

[0046] Figure 9 is a structural schematic diagram of the foldable electronic device shown in Figure 1

[0047] is a structural schematic diagram of a first door plate of the rotating mechanism shown in Figure 10 Figure 5 is an enlarged structural schematic diagram of A of the first door plate shown in

[0048] Figure 11 Figure 10 is an enlarged structural schematic diagram of B of the first door plate shown in

[0049] Figure 12 is a structural schematic diagram of F-F of Figure 11

[0050] is an enlarged structural schematic diagram of B of the first door plate shown in Figure 13 Figure 10 is an enlarged structural schematic diagram of B of the first door plate shown in​​​​​​

[0051] Figure 14 is Figure 13 a cross-sectional structure schematic view of the E-E direction of the first door plate.

[0052] Figure 15 is Figure 10 a cross-sectional structure schematic view of the D-D direction of the first door plate shown in

[0053] Figure 16 is a structure schematic view of the first door plate provided by another embodiment of the application.

[0054] Figure 17 is Figure 16 a partial structure schematic view of the first door plate shown in

[0055] Figure 18 is a cross-sectional structure schematic view of the foldable electronic device in the folded state provided by another embodiment of the application.

[0056] 1000 - foldable electronic device, 1100 - main body, 1200 - display screen, 1210 - first display part, 1220 - second display part, 1230 - bendable part, 100 - rotating mechanism, 110 - bearing base, 111 - first main sliding groove, 112 - second main sliding groove, 120 - first main swing arm, 121 - first main sliding part, 122 - first connecting part, 123 - first main rotating part, 124 - first connecting surface, 130 - second main swing arm, 131 - second main sliding part, 132 - second connecting part, 133 - second main rotating part, 134 - second connecting surface, 140 - first auxiliary swing arm, 150 - second auxiliary swing arm, 160 - second door plate, 161 - second supporting surface, 170 - third door plate, 171 - third supporting surface, 180 - first rotating shaft, 181 - second rotating shaft, 10 - first door plate, 11 - first supporting surface, 12 - first end part, 13 - middle part, 14 - second end part, 20 - first arc-shaped groove, 21 - first concave arc surface, 22 - first edge, 23 - second edge, 24 - third edge, 25 - fourth edge, 26 - first gap, 27 - first transition groove, 28 - second transition groove, 29 - third transition groove, 30 - second arc-shaped groove, 31 - second concave arc surface, 32 - second gap, 40 - buffer pad, 200 - first shell, 210 - first middle frame, 211 - first bearing piece, 212 - first bearing plate, 213 - second bearing plate, 214 - first mounting groove, 220 - first supporting plate, 221 - first supporting surface, 230 - first connecting block, 300 - second shell, 310 - second middle frame, 311 - second bearing piece, 312 - third bearing plate, 313 - fourth bearing plate, 314 - second mounting groove, 320 - second supporting plate, 321 - second supporting surface, 330 - second connecting block. DETAILED DESCRIPTION

[0057] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0058] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a foldable electronic device 1000 in a folded state provided by the embodiments of the present application. Figure 2 is a structural schematic diagram of the foldable electronic device 1000 in an unfolded state provided by the embodiments of the present application.

[0059] Figure 1 The folding angle of the foldable electronic device 1000 shown in Figure 2 The unfolding angle of the foldable electronic device 1000 shown in

[0060] It should be noted that the angles exemplified in the embodiments of the present application can have a little deviation. For example, Figure 1 The deviation of the folding angle of the foldable electronic device 1000 shown in Figure 2 The deviation of the unfolding angle of the foldable electronic device 1000 shown in

[0061] For the convenience of description, the width direction of the foldable electronic device 1000 is defined as the X-axis direction, the length direction of the foldable electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the foldable electronic device 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0062] The foldable electronic device 1000 includes a main body 1100 and a display screen 1200, and the display screen 1200 is installed on the main body 1100. The display screen 1200 is a flexible screen, and the display screen 1200 includes a display surface and a mounting surface, and the display surface and the mounting surface are arranged oppositely. The display surface is used to display text, images and videos, etc. The display screen 1200 includes a first display part 1210, a second display part 1220 and a bendable part 1230. The bendable part 1230 is located between the first display part 1210 and the second display part 1220.

[0063] Please refer to Figure 3 , Figure 3 is a structural schematic diagram of a main body 1100 of a foldable electronic device 1000 provided by embodiments of the present application. The main body 1100 includes a first shell 200, a second shell 300, and a rotating mechanism 100. The rotating mechanism 100 is mounted to the first shell 200 and the second shell 300 to achieve a rotating connection between the first shell 200 and the second shell 300. The first shell 200 and the second shell 300 can be relatively rotated by the rotating mechanism 100, so that the main body 1100 is switched between a folded state and an unfolded state.

[0064] A display screen 1200 is mounted to the main body 1100, and a mounting surface is fixedly connected to the main body 1100. Specifically, a first display portion 1210 is fixedly mounted to the first shell 200, and a second display portion 1220 is fixedly mounted to the second shell 300. The rotating mechanism 100 is arranged opposite to a bendable portion 1230 to achieve bending of the display screen 1200. The bendable portion 1230 is not fixed to the rotating mechanism 100. The side of the first shell 200 and the second shell 300 facing away from the display screen 1200 is an outer side of the electronic device, and the side carrying the display screen 1200 is an inner side.

[0065] In some embodiments, in some embodiments, refer to Figure 4 , Figure 4 is Figure 3 a structural schematic diagram of the first shell 200 and the second shell 300 of the main body 1100 shown in

[0066] The first shell 200 is provided with a first mounting groove 214. Specifically, the first shell 200 includes a first middle frame 210, a first back plate (not shown in the figure), a first support plate 220, and a first connecting block 230. The first back plate and the first support plate 220 are respectively fixed to the first middle frame 210 on two sides facing away from each other along the Z-axis direction. The first middle frame 210, the first back plate, and the first support plate 220 enclose a first accommodating cavity (not shown in the figure), which is used to mount devices such as circuit boards and batteries. The surface of the first support plate 220 facing away from the first accommodating cavity is a first support surface 221, which is used to support the first display portion 1210.

[0067] Continuing to refer to Figure 4The second housing 300 is identical in structure to the first housing 200, and the second housing 300 is provided with a second mounting groove 314. Specifically, the second housing 300 includes a second middle frame 310, a second back plate (not shown in the figure), a second support plate 320, and a second connecting block 330. The second back plate and the second support plate 320 are respectively fixed to two sides of the second middle frame 310 along the Z-axis direction. The second middle frame 310, the second back plate, and the second support plate 320 enclose a second accommodating cavity (not shown in the figure), and the second accommodating cavity is used to mount devices such as a circuit board and a battery. The surface of the second support plate 320 away from the second accommodating cavity is a second support surface 321, and the second support surface 321 is used to support the second display part 1220.

[0068] The second middle frame 310 is provided with a second bearing 311 on the side facing the first housing 200. The second bearing 311 includes a third bearing plate 312 and a fourth bearing plate 313, and the second bearing plate 213 and the second bearing plate 213 are connected in an L shape, and the second bearing plate 213 and the second bearing plate 213 enclose the second mounting groove 314. The second connecting block 330 can be a wedge-shaped block, and the second connecting block 330 is fixed in the second mounting groove 314.

[0069] In some embodiments, with reference to Figure 5 , Figure 5 is Figure 3 The schematic diagram of the split structure of the rotating mechanism 100 of the main body 1100 shown in FIG. 1. The rotating mechanism 100 includes a bearing base 110, a first main swing arm 120, a second main swing arm 130, a first auxiliary swing arm 140, a second auxiliary swing arm 150, a first door plate 10, a second door plate 160, and a third door plate 170. The first main swing arm 120 and the second main swing arm 130 form a first auxiliary swing arm 140 group, the first auxiliary swing arm 140 and the second auxiliary swing arm 150 form a second auxiliary swing arm 150 group, and the number of the first auxiliary swing arm 140 group and the second auxiliary swing arm 150 group can be different. Both the first swing arm group and the second swing arm group can be multiple, for example, the first swing arm group is six, and the second swing arm group is five.

[0070] With reference to Figure 6 , Figure 6 is Figure 2FIG. 2 is a schematic view of a cross-sectional structure of the foldable electronic device 1000 along the A-A direction. When the foldable electronic device 1000 is in the unfolded state, the first housing 200 and the second housing 300 are relatively unfolded, the first mounting groove 214 and the second mounting groove 314 are connected to form an accommodation groove, and the support base 110 is completely located in the accommodation groove. The support base 110 is arranged between the first housing 200 and the second housing 300, and the support base 110 is provided with a first main sliding groove 111 and a second main sliding groove 112. The first main swing arm 120 includes a first main sliding part 121, a first connecting part 122, and a first main rotating part 123 fixedly connected along the X-axis direction. The first main sliding part 121 is slidingly connected to the first main sliding groove 111, and the first main rotating part 123 is rotatably connected to the first connecting block 230 through the first rotating shaft 180. In the positive direction of the Z-axis, the first connecting part 122 protrudes relative to the first main sliding part 121 and the first main rotating part 123, and in the negative direction of the Z-axis, the first connecting part 122 is recessed relative to the first main sliding part 121 and the first main rotating part 123, so that the first connecting part 122 can avoid the edge of the support base 110, and the first main sliding part 121 can smoothly enter the first main sliding groove 111 beyond the edge of the support base 110. The side of the first connecting part 122 protruding relative to the first main sliding part 121 and the first main rotating part 123 is provided with a first connecting surface 124.

[0071] The second main swing arm 130 includes a second main sliding part 131, a second connecting part 132, and a second main rotating part 133 fixedly connected along the X-axis direction. The second main sliding part 131 is slidingly connected to the second main sliding groove, and the second main rotating part 133 is rotatably connected to the second connecting block 330 through the second rotating shaft 181. In the positive direction of the Z-axis, the second connecting part 132 protrudes relative to the second main sliding part 131 and the second main rotating part 133, and in the negative direction of the Z-axis, the second connecting part 132 is recessed relative to the second main sliding part 131 and the second main rotating part 133, so that the second connecting part 132 can avoid the edge of the support base 110, and the second main sliding part 131 can smoothly enter the second main sliding groove 112 beyond the edge of the support base 110. The side of the second connecting part 132 protruding relative to the second main sliding part 131 and the second main rotating part 133 is provided with a second connecting surface 134.

[0072] The first auxiliary swing arm 140 includes a first sliding part (not labeled in the figure) and a first rotating part (not labeled in the figure) fixedly connected along the X-axis direction. The first sliding part is slidingly connected to the first connecting block 230, and the first rotating part is rotatably connected to the support base 110. The second auxiliary swing arm 150 includes a second sliding part (not labeled in the figure) and a second rotating part (not labeled in the figure) fixedly connected along the X-axis direction. The second sliding part is slidingly connected to the second connecting block 330, and the second rotating part is rotatably connected to the support base 110.

[0073] The first door plate 10 is provided with a first support surface 11 in the direction of the Z axis, and the first support surface 11 is located on the side of the first door plate 10 away from the bearing base 110. The first door plate 10 is fixed in layers with the bearing base 110, and the second door plate 160 and the third door plate 170 are located on both sides of the first door plate 10 in the direction of the X axis. The second door plate 160 is slidably connected with the first connecting block 230, the first main swing arm 120 and the first auxiliary swing arm 140 respectively, and the second door plate 160 closes the first mounting slot 214. The second door plate 160 is provided with a second support surface 161, and the second support surface 161 is located on the side of the second door plate 160 away from the first mounting slot 214. The third door plate 170 is slidably connected with the second connecting block 330, the second main swing arm 130 and the second auxiliary swing arm 150 respectively, and the third door plate 170 closes the second mounting slot 314. The third door plate 170 is provided with a third support surface 171, and the third support surface 171 is located on the side of the third door plate 170 away from the second mounting slot 314.

[0074] The first support plate 220, the second door plate 160, the first door plate 10, the third door plate 170 and the second support plate 320 are arranged in sequence in the direction of the X axis, and the first support surface 221, the second support surface 161, the first support surface 11, the third support surface 171 and the second support surface 321 are arranged in sequence to form a total support surface. The first display part 1210 is fixed in layers on the first support surface 221, the second display part 1220 is fixed in layers on the second support surface 321, and the bendable part 1230 is fixed in layers on the second support surface 161, the first support surface 11 and the third support surface 171. The first display part 1210, the bendable part 1230 and the second display part 1220 are arranged in sequence in the direction of the X axis, and the display screen 1200 has a large display area. The first main sliding part 121 is located in the first main sliding slot, the first connecting part 122 is hidden below the first door plate 10 and the second door plate 160, that is, the first connecting surface 124 is hidden below the first door plate 10 and the second door plate 160. The second main sliding part 131 is located in the second main sliding slot, and the second connecting part 132 is hidden below the first door plate 10 and the third door plate 170, that is, the second connecting surface 134 is hidden below the first door plate 10 and the third door plate 170.

[0075] The rotating mechanism 100 can realize the switching of the main body 1100 between the folded state and the unfolded state. In the following detailed description, in the process of switching the foldable electronic device 1000 from the unfolded state to the folded state, the first auxiliary swing arm 140 rotates relative to the bearing base 110 and slides relative to the first shell 200, the first main swing arm 120 rotates relative to the first shell 200 and slides relative to the bearing base 110, and the first auxiliary swing arm 140 and the first main swing arm 120 drive the first shell 200 to rotate relative to the bearing base 110. At the same time, the second auxiliary swing arm 150 rotates relative to the bearing base 110 and slides relative to the second shell 300, the second main swing arm 130 rotates relative to the second shell 300 and slides relative to the bearing base 110, and the second auxiliary swing arm 150 and the second main swing arm 130 drive the second shell 300 to rotate relative to the bearing base 110, so as to switch the first shell 200 and the second shell 300 to the folded state.

[0076] In the movement of the first shell 200, the first auxiliary swing arm 140 and the first main swing arm 120, one side of the second door plate 160 slides relative to the first shell 200, and the other side of the second door plate 160 slides relative to the first main swing arm 120 and the first auxiliary swing arm 140. In the movement of the second shell 300, the second auxiliary swing arm 150 and the second main swing arm 130, one side of the third door plate 170 slides relative to the second shell 300. The other side of the third door plate 170 slides relative to the second main swing arm 130 and the second auxiliary swing arm 150.

[0077] Reference Figure 7 , Figure 7 is Figure 1A B-B cross-sectional structure diagram of the foldable electronic device 1000 is shown in FIG. 13. When the foldable electronic device 1000 is in the folded state, the first housing 200 and the second housing 300 are relatively folded, that is, the first housing 200 and the second housing 300 are stacked along the Z-axis direction, the carrying base 110 exposes the side away from the display screen 1200, forming part of the appearance of the foldable electronic device 1000. The total support surface is located on the inner side of the foldable electronic device 1000, the first support surface 221 and the second support surface 321 are opposite along the Z-axis direction, the second support surface 161 and the third support surface 171 are opposite along the Z-axis direction, and the second support surface 161 is inclined relative to the first support surface 221, and the third support surface 171 is inclined relative to the second support surface 321. The first support surface 11 is located between the second support surface 161 and the third support surface 171, and the first support surface 11 is perpendicular to the first support surface 221. The first main sliding part 121 is separated from the first main sliding groove, the first connecting part 122 is exposed relative to the first door plate 10 and the second door plate 160, and the first connecting surface 124 is located between the first support surface 11 and the second support surface 161. The second main sliding part 131 is separated from the second main sliding groove, the second connecting part 132 is exposed relative to the second door plate 160 and the second door plate 160, and the second connecting surface 134 is located between the second support surface 161 and the second support surface 161.

[0078] The display screen 1200 is installed on the total support surface, so the display screen 1200 is also located on the inner side of the foldable electronic device 1000, and is curved into a drop shape, specifically, the first display part 1210 and the second display part 1220 are opposite along the Z-axis direction, and the bendable part 1230 is curved into a drop shape, that is, at this time, the bendable part 1230 is in an arc shape. And the bendable part 1230 is stacked on the second support surface 161, the first connecting surface 124, the first support surface 11, the second connecting surface 134 and the third support surface 171.

[0079] To meet the strength requirement of the first main swing arm 120 and the second main swing arm 130 and reduce the risk of breakage of the first main swing arm 120 and the second main swing arm 130, the thickness of the first connecting part 122 and the second connecting part 132 is relatively large. Therefore, when the foldable electronic device 1000 is in the folded state, the first connecting surface 124 is protruded relative to the first supporting surface 221, and the second connecting surface 134 is protruded relative to the second supporting surface 321. That is, the first connecting part 122 and the second connecting part 132 occupy part of the inner space of the foldable electronic device 1000, resulting in a decrease in the space reserved for the bendable part 1230, that is, a decrease in the screen space. When the foldable electronic device 1000 is in the folded state and falls, the bendable part 1230 deforms towards the first connecting surface 124 and the second connecting surface 134. Due to the small screen space, the bendable part 1230 is pressed by the first connecting surface 124, the second connecting surface 134, and the first supporting surface 11, and then the bendable part 1230 and the parts corresponding to the first main swing arm 120 and the second main swing arm 130 are dead-folded, which causes the curved display screen 1200 to be invalid, and finally causes the entire display screen 1200 to be invalid.

[0080] With reference to Figure 7 and Figure 8 , Figure 8 is Figure 5 is an enlarged structural schematic view of the rotating mechanism 100 at position F shown in FIG. 1. To reduce the risk of the bendable part 1230 being pressed and invalid, in some embodiments, the first supporting surface 11 of the first door panel 10 is provided with a first arc-shaped groove 20, which is formed by downwardly recessing part of the first supporting surface 11. The first arc-shaped groove 20 has a first concave arc surface 21. The first arc-shaped groove 20 has a central axis C1 in the X-axis direction, and the central axis C1 is parallel to the X-axis direction. The central axes of the first main sliding part 121 and the second main sliding part 131 in the X-axis direction are coincident with the central axis C1. That is, in the X-axis direction, the central axes of the first arc-shaped groove 20, the first main sliding part 121, and the second main sliding part 131 are coincident. In the Y-axis direction, the length dimension A of the first arc-shaped groove 20 is greater than the width dimension B of the first main sliding part 121, and the length dimension A of the first arc-shaped groove 20 is greater than the width dimension C of the second main sliding part 131. The length direction of the first arc-shaped groove 20, the width direction of the first main sliding part 121, and the width direction of the second main sliding part 131 are parallel to the Y-axis direction.

[0081] When the foldable electronic device 1000 is in the unfolded state, the bendable part 1230 is flattened, the bendable part 1230 is stacked with and in contact with the first supporting surface 11, the bendable part 1230 covers the first arc-shaped groove 20, and there is a gap between the bendable part 1230 and the first concave arc surface 21 of the first arc-shaped groove 20.

[0082] When the foldable electronic device 1000 is in the folded state, the bendable part 1230 is bent into an arc shape, and a part of the bendable part 1230 is located in the first arc-shaped groove 20, and the bendable part 1230 is parallel to the first concave arc surface 21 of the first arc-shaped groove 20. The first arc-shaped groove 20 increases the inner space when the foldable electronic device 1000 is in the folded state, thereby providing a larger space for the part of the bendable part 1230 corresponding to the first main swing arm 120 and the second main swing arm 130, that is, increasing the screen space, improving the anti-falling ability of the foldable electronic device 1000, reducing the stress concentration phenomenon, reducing the risk of the bendable part 1230 being extruded to failure, and ultimately reducing the risk of the entire display screen 1200 being disabled.

[0083] In some embodiments, the first arc-shaped groove 20 has a center axis C2 parallel to the Y-axis direction. The center axis of the first support surface 11 along the Y-axis direction coincides with the center axis C2. That is, along the Y-axis direction, the center axes of the first arc-shaped groove 20 and the first support surface 11 coincide. In this way, the center axis of the first arc-shaped groove 20 and the center axis of the rotating mechanism 100 coincide, so that the parts of the bendable part 1230 located on both sides of the center axis C2 can occupy the same screen space, preventing the screen space reserved for the two sides of the bendable part 1230 from being inconsistent, thereby reducing the risk of the display screen 1200 being extruded. The first arc-shaped groove 20 is symmetrical about the center axis C1, and the first arc-shaped groove 20 is symmetrical about the center axis C2.

[0084] In some embodiments, with reference to Figure 8 , the length dimension A of the first arc-shaped groove 20, the width dimension B of the first main sliding part 121, and the width dimension C of the second main sliding part 131 satisfy the following relationship: B = C = A + 0.1 mm. In this way, sufficient space can be provided for the positions of the bendable part 1230 corresponding to the first main swing arm 120 and the second main swing arm 130, and the first support surface 11 has a larger area, so that when the foldable electronic device 1000 is in the unfolded state, the display screen 1200 can be better supported, the display screen 1200 can be kept in the unfolded state, the touch feeling can be improved, the folding mark can be reduced, and the user experience can be improved.

[0085] In some embodiments, with reference to Figure 7 , when the foldable electronic device 1000 is in the folded state, the bendable part 1230 and the first concave arc surface 21 have a first gap 26. When the foldable electronic device 1000 falls, the bendable part 1230 can first move into the first gap 26, thereby buffering the impact force received by the bendable part 1230 and reducing the risk of the bendable part 1230 failing.

[0086] In some embodiments, with reference to Figure 9 , Figure 9 is Figure 1A C-C cross-sectional structure schematic diagram of the foldable electronic device 1000 shown in FIG. 1. The first support surface 11 is concavely provided with the first arc-shaped slot 20. When the foldable electronic device 1000 is in an unfolded state, the part of the first support surface 11 not provided with the first arc-shaped slot 20 is used to support the bendable part 1230, so that the bendable part 1230 is flattened, which can improve the touch feeling, reduce the crease, and increase the user experience. When the foldable electronic device 1000 is in a folded state, the rest of the first support surface 11 supports the rest of the bendable part 1230, which refers to the rest of the bendable part 1230 except the part corresponding to the first main swing arm 120 and the second main swing arm 130. The rest of the bendable part 1230 has a larger radius of curvature, a smaller curvature, and a smaller bending degree, so the risk of dead folding of the rest of the bendable part 1230 is reduced.

[0087] In some embodiments, with reference to Figure 5 and Figure 10 , Figure 10 is Figure 5 A structure schematic diagram of the first door plate 10 of the rotating mechanism 100 shown in FIG. 1. The number of the first arc-shaped slots 20 is the same as the number of the first swing arm groups, for example, both the first arc-shaped slots 20 and the first swing arm groups are six, and the six first arc-shaped slots 20 and the six first swing arm groups correspond one by one. The first door plate 10 includes a first end portion 12, a middle portion 13, and a second end portion 14, which are sequentially connected along the Y-axis direction. The bearing base 110 is provided with the first main swing arm 120 and the second main swing arm 130 at positions corresponding to the first end portion 12, the middle portion 13, and the second end portion 14. Correspondingly, the first end portion 12, the middle portion 13, and the second end portion 14 are each provided with the first arc-shaped slot 20. The first swing arm groups are sequentially and spaced arranged along the Y-axis direction, and correspondingly, the plurality of first arc-shaped slots 20 are sequentially and spaced arranged along the Y-axis direction. And the first end portion 12 and the second end portion 14 are each provided with one first arc-shaped slot 20, and the middle portion 13 is provided with four first arc-shaped slots 20.

[0088] With reference to Figure 11 , Figure 11 is Figure 10The enlarged structural schematic view of the first door plate 10 at A shown in the middle. The first arc-shaped slot 20 comprises a first edge 22, a second edge 23, a third edge 24 and a fourth edge 25. In the Y-axis direction, the first edge 22 and the second edge 23 are opposite to each other. In the X-axis direction, the third edge 24 and the fourth edge 25 are opposite to each other. The first edge 22, the third edge 24, the second edge 23 and the fourth edge 25 are sequentially connected. The length of the first arc-shaped slot 20 refers to the size of the first edge 22 to the second edge 23. The width of the first arc-shaped slot 20 refers to the size of the third edge 24 to the fourth edge 25. For the first arc-shaped slot 20 at the end, in the direction from the middle part 13 to the end, the width of the first arc-shaped slot 20 gradually increases. That is, in the direction from the first edge 22 to the second edge 23, the distance between the third edge 24 and the fourth edge 25 gradually increases. Specifically, the third edge 24 and the fourth edge 25 are both inclined relative to the Y-axis direction, and the included angle a between the third edge 24 and the Y-axis direction is between 5° and 10°, and a can be 5°, 6°, 7°, 8°, 9° or 10°, etc. The third edge 24 and the fourth edge 25 can be arc-shaped or linear. When the third edge 24 and the fourth edge 25 are arc-shaped, the included angle between the third edge 24 and the Y-axis direction refers to the included angle between the line connecting the opposite ends of the first edge 22 and the Y-axis direction. The included angle between the fourth edge 25 and the Y-axis direction refers to the right angle between the line connecting the opposite ends of the fourth edge 25 and the Y-axis direction.

[0089] The width of the first arc-shaped slot 20 at the end gradually decreases, which can provide space for the bendable part 1230, so that the stress is uniformly dispersed, and the first supporting surface 11 has a larger area, so that when the foldable electronic device 1000 is in the unfolded state, the display screen 1200 can be better supported, the touch feeling can be improved, the crease can be reduced, and the user experience can be improved.

[0090] In addition, when the foldable electronic device 1000 is in the folded state, if the foldable electronic device 1000 is tilted and falls, and any one end of the bearing base 110 is the force point, it is called a small-angle head-tail fall, which is referred to as an angle fall. If the first arc-shaped slot 20 is not provided, and the foldable electronic device 1000 is in the angle fall, the bendable part 1230 is most easily extruded at the position corresponding to the force point, and the part of the bendable part 1230 that is most easily extruded is referred to as a vulnerable part. The vulnerable part of the bendable part 1230 corresponds to the end of the first door plate 10 that is away from the middle part 13.

[0091] From the width variation of the first arc-shaped groove 20 at the end, it can be seen that when the foldable electronic device 1000 appears an angle drop, the widest position of the first arc-shaped groove 20 at the end is opposite to the vulnerable part of the bendable part 1230, so that the screen space provided for the bendable part 1230 is increased the most, the vulnerable part of the bendable part 1230 is prevented from appearing a dead fold, the risk of failure of the vulnerable part of the bendable part 1230 is reduced, and finally the risk of failure of the entire display screen 1200 can be reduced.

[0092] In some embodiments, with reference to Figure 11 , the first support surface 11 is further provided with a first transition groove 27, and the first transition groove 27 is used to accommodate a part of the bendable part 1230 when the rotating mechanism 100 is in a folded state.

[0093] With reference to Figure 12 , Figure 12 is Figure 11 a schematic view of a F-F cross-sectional structure of the first transition groove 27. Along the Y-axis direction, the first transition groove 27 is located at one side of the first arc-shaped groove 20 close to the intermediate part 13, the central axis of the first transition groove 27 coincides with the central axis C2 of the first arc-shaped groove 20, and the depth of the first transition groove 27 gradually decreases. The depth of the first transition groove 27 refers to the dimension of the position of the first transition groove 27 along the Z-axis direction at the central axis C2. The depth of the first arc-shaped groove 20 refers to the dimension of the position of the first arc-shaped groove 20 along the Z-axis direction at the central axis C2. In this embodiment, the first arc-shaped groove 20 remains unchanged along the Y-axis direction, which includes the machining error. Of course, in other embodiments, the depth of the first arc-shaped groove 20 can also be varied, such as gradually shallowing from one end to the other end of the first arc-shaped groove 20, or gradually shallowing from the middle to the two ends, etc. This application is not limited.

[0094] The deepest position of the first transition groove 27 communicates with the first arc-shaped groove 20, and the depth of the deepest position of the first transition groove 27 is the same as that of the first arc-shaped groove 20. The first transition groove 27 can make the side of the first arc-shaped groove 20 close to the intermediate part 13 and the first support surface 11 smoothly transition, prevent the first edge 22 of the first arc-shaped groove 20 from appearing a groove side perpendicular to the first support surface 11, and prevent the bendable part 1230 from appearing a dead fold.

[0095] With reference to Figure 11 , the width of the first transition groove 27 gradually decreases. The widest position of the first transition groove 27 communicates with the narrowest position of the first arc-shaped groove 20, and the width of the widest position of the first transition groove 27 is the same as that of the narrowest position of the first arc-shaped groove 20. It can prevent the first transition groove 27 from occupying too much space, so that the first support surface 11 has enough area to support the bendable part 1230.

[0096] In some embodiments, with reference to Figure 11The first supporting surface 11 is further provided with a second transition groove 28, which is used to accommodate a part of the bendable portion 1230 when the rotating mechanism 100 is in the folded state, so as to increase the screen accommodating space.

[0097] In the Y-axis direction, the second transition groove 28 is located on the side of the first arc-shaped groove 20 away from the middle portion 13, the second transition groove 28 penetrates the end surface away from the middle portion 13, and the central axis of the second transition groove 28 coincides with the central axis C2 of the first arc-shaped groove 20. Referring to Figure 12 The depth of the second transition groove 28 gradually decreases, and the shallowest position of the second transition groove 28 is in communication with the first arc-shaped groove 20. The second transition groove 28 can make the side of the first arc-shaped groove 20 away from the middle portion 13 and the first supporting surface 11 smoothly transition, prevent the second edge 23 of the first arc-shaped groove 20 from having a groove side surface perpendicular to the first supporting surface 11, and prevent the bendable portion 1230 from being folded dead.

[0098] Referring to Figure 11 The width of the second transition groove 28 gradually decreases. The narrowest position of the second transition groove 28 is in communication with the widest position of the first arc-shaped groove 20, and the width of the narrowest position of the second transition groove 28 is the same as that of the widest position of the first arc-shaped groove 20. This can prevent the second transition groove 28 from occupying too much space, so that the first supporting surface 11 has sufficient area to support the bendable portion 1230.

[0099] In some embodiments, referring to Figure 13 , Figure 13 is Figure 10 an enlarged structural schematic view of B of the first door panel 10 shown in FIG. 1. For the first arc-shaped groove 20 located in the middle portion 13, from the central axis C1 to the end of the first arc-shaped groove 20. That is, the first arc-shaped groove 20 located in the middle portion 13 gradually decreases from the middle to the two ends. Specifically, the first arc-shaped groove 20 located in the middle portion 13 includes a first edge 22, a second edge 23, a third edge 24, and a fourth edge 25. The first arc-shaped groove 20 has a first concave arc surface 21. The first concave arc surface 21 is located between the first edge 22, the third edge 24, the second edge 23, and the fourth edge 25. The third edge 24 and the fourth edge 25 are both arc-shaped. In other embodiments, the third edge 24 and the fourth edge 25 can also be straight.

[0100] From the central axis C1 to the first edge 22, the width of the first arc-shaped groove 20 gradually decreases, that is, the third edge 24 and the fourth edge 25 gradually approach each other. From the central axis C1 to the second edge 23, the width of the first arc-shaped groove 20 gradually decreases, that is, the third edge 24 and the fourth edge 25 gradually approach each other. That is, the closer to the central axis C1, the wider the first arc-shaped groove 20. Conversely, the farther away from the central axis C1, the smaller the width of the first arc-shaped groove 20. That is, the first arc-shaped groove 20 is widest near the central axis C1.

[0101] The first arc-shaped groove 20 gradually decreases in width from the middle to the two ends, which can increase the space provided to the bendable part 1230, can make the stress uniformly dispersed, reduce the stress concentration phenomenon, thereby reducing the failure risk of the bendable part 1230, and can also make the first supporting surface 11 have a larger area, so that the display screen 1200 can be better supported when the foldable electronic device 1000 is in an unfolded state, the touch feeling can be improved, the crease can be reduced, and the user experience can be improved.

[0102] In addition, if the middle part 13 is not provided with the first arc-shaped groove 20, the foldable electronic device 1000 is in a folded state and falls, and the side of the bearing base 110 away from the first door plate 10 is the force point, the position corresponding to the center axis C1 of the bendable part 1230 is the vulnerable part. In the embodiment of the application, the widest position of the first arc-shaped groove 20 of the middle part 13 is opposite to the vulnerable part of the bendable part 1230, so that the screen accommodating space provided to the bendable part 1230 is increased the most, thereby preventing the vulnerable part of the bendable part 1230 from being dead folded, reducing the failure risk of the vulnerable part of the bendable part 1230, and ultimately reducing the failure risk of the entire display screen 1200.

[0103] In some embodiments, referring to Figure 13 , the first supporting surface 11 is further provided with a third transition groove 29, which is in communication with the first arc-shaped groove 20 located in the middle part 13 along the Y-axis direction. It can be understood that the two ends of the first arc-shaped groove 20 along the Y-axis direction are both provided with the third transition groove 29. When the rotating mechanism 100 is in a folded state, the third transition groove 29 is used to accommodate a part of the bendable part 1230 to increase the screen accommodating space.

[0104] Referring to Figure 14 , Figure 14 is Figure 13 an E-E cross-sectional structure schematic view. Along the Y-axis direction, the center axis of the third transition groove 29 coincides with the center axis C2 of the first arc-shaped groove 20, and the depth of the third transition groove 29 gradually decreases, and the deepest position of the third transition groove 29 is in communication with the first arc-shaped groove 20. The deepest position of the third transition groove 29 has the same depth as the first arc-shaped groove 20. The third transition groove 29 can make the first arc-shaped groove 20 and the first supporting surface 11 smoothly transition, prevent the first edge 22 and the second edge 23 of the first arc-shaped groove 20 from having a groove side perpendicular to the first supporting surface 11, and prevent the bendable part 1230 from being dead folded.

[0105] Referring to Figure 13The third transition groove 29 gradually decreases in width. The widest position of the third transition groove 29 communicates with the narrowest position of the first arc-shaped groove 20, and the width of the widest position of the third transition groove 29 is the same as that of the narrowest position of the first arc-shaped groove 20. The third transition groove 29 can be prevented from occupying too much space, so that the first support surface 11 has sufficient area to support the bendable part 1230.

[0106] That is, the first support surface 11 is also concavely provided with a transition groove, which communicates with the first arc-shaped groove 20 along the Y-axis direction, and the depth of the transition groove gradually changes to smoothly transition between the first arc-shaped groove 20 and the first support surface 11. The transition groove includes the first transition groove 27 and the third transition groove 29. The first arc-shaped groove 20 and the first support surface 11 are prevented from having a gap, and the display screen 1200 is prevented from being dead-folded due to the gap.

[0107] In some embodiments, with reference to Figure 15 , Figure 15 is Figure 10 is a schematic view of the D-D cross-sectional structure of the first door panel 10 shown in FIG. 1. The arc length L of the widest position of the first arc-shaped groove 20 is greater than the radius R of the circle in which the vulnerable part of the bendable part 1230 is located. Thus, the vulnerable part of the bendable part 1230 can be provided with more space, thereby preventing the bendable part 1230 from failing, and ultimately reducing the risk of failure of the entire display screen 1200. Specifically, the arc length L and the radius R satisfy the following condition: L = R + 0.3 mm. The screen space can be increased, and the screen space can be prevented from occupying too much space of the first support surface 11, thereby ensuring that the first support surface 11 has sufficient area to support the display screen 1200.

[0108] In some embodiments, the depth H of the first arc-shaped groove 20 is related to the center O of the circle in which the vulnerable part of the bendable part 1230 is located. If the bendable part 1230 moves upward, that is, the center O of the circle in which the vulnerable part of the bendable part 1230 is located moves upward, then the depth H of the first arc-shaped groove 20 can be reduced accordingly. Conversely, if the bendable part 1230 moves downward, that is, the center O of the circle in which the vulnerable part of the bendable part 1230 is located moves downward, then the depth H of the first arc-shaped groove 20 can be increased accordingly.

[0109] In other embodiments, with reference to Figure 16 and Figure 17 , Figure 16 is a structural schematic view of the first door panel 10 provided by another embodiment of the present application, Figure 17 is Figure 16A partial structure diagram of the first door plate is shown in FIG. 1. The first support surface 11 of the first door plate 10 is concavely provided with a first arc-shaped slot 20 and a second arc-shaped slot 30. The first arc-shaped slot 20 is the same as that in the above embodiment and will not be described again. The second arc-shaped slot 30 is communicated with the first arc-shaped slot 20 along the Y-axis direction. Along the Y-axis direction, the central axis of the second arc-shaped slot 30 coincides with the central axis C2 of the first arc-shaped slot 20. The second arc-shaped slot 30 has a second concave arc surface 31. There is a second arc-shaped slot 30 between any two adjacent first arc-shaped slots 20. The plurality of first arc-shaped slots 20 and the plurality of second arc-shaped slots 30 are communicated to form a total arc-shaped slot, which penetrates the first door plate 10 along the Y-axis direction. After the first rotating part and the second rotating part are respectively rotationally connected with the bearing base 110, along the Z-axis direction, the first rotating part and the second rotating part are opposite to the second arc-shaped slot 30. In this way, more space can be provided for the position corresponding to the bendable part 1230 and the first auxiliary swing arm 140 and the second auxiliary swing arm 150, so as to prevent the bendable part 1230 from being dead folded. The overall reliability of the display screen 1200 is improved, and the folding mark of the display screen 1200 is reduced.

[0110] In some embodiments, the width of the first arc-shaped slot 20 gradually changes, the narrowest position of the first arc-shaped slot 20 is communicated with the second arc-shaped slot 30, and the width of the second arc-shaped slot 30 is the same as the width of the narrowest position of the first arc-shaped slot 20. In this way, the first support surface 11 has sufficient area to reliably support the bendable part 1230 when the foldable electronic device 1000 is in the unfolded state, so that the bendable part 1230 remains in the flat state.

[0111] When the foldable electronic device 1000 is in the unfolded state, the bendable part 1230 is flat, and the bendable part 1230 is fixed in layers on the first support surface 11. The bendable part 1230 covers the first arc-shaped slot 20 and the second arc-shaped slot 30. When the foldable electronic device 1000 is in the folded state, the bendable part 1230 is bent into a water drop shape. Part of the bendable part 1230 is located in the second arc-shaped slot 30, and the bendable part 1230 is parallel to the second concave arc surface 31 of the second arc-shaped slot 30. By providing the second arc-shaped slot 30, more space can be provided for the position corresponding to the bendable part 1230 and other components such as the first auxiliary swing arm 140 and the second auxiliary swing arm 150, so as to prevent the bendable part 1230 from being dead folded and invalid, and further improve the reliability of the display screen 1200.

[0112] Reference Figure 18 , Figure 18is a cross-sectional structure schematic diagram of the foldable electronic device 1000 in the folded state provided by another embodiment of the present application. The second gap 32 is between the bendable portion 1230 and the second concave arc surface 31. The second gap 32 is provided with a buffer pad 40, and the buffer pad 40 is fixed to the second concave arc surface 31. The buffer pad 40 can be made of foam or rubber, etc. The function of the second gap 32 is referred to the first gap 26. When the foldable electronic device 1000 is in the folded state and the bearing base 110 is subjected to an external impact force, the buffer pad 40 can be compressed and deformed to absorb the impact force received by the bendable portion 1230, preventing the bendable portion 1230 from failing.

[0113] The above is only part of the embodiments and implementations 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 by 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 rotating mechanism, characterized in that, include: The first swing arm assembly, the bearing base, and the first door panel; the first swing arm assembly includes a first main swing arm and a second main swing arm, the first main swing arm includes a first main sliding part, and the second main swing arm includes a second main sliding part; The first main swing arm and the second main swing arm are disposed on opposite sides of the bearing base, and the first main sliding part and the second main sliding part are slidably and rotatably connected to the bearing base; Along the thickness direction of the rotating mechanism, the first door panel and the bearing base are stacked and fixed together; the first door panel is provided with a first support surface on the side opposite to the bearing base, and the first support surface is recessed with a first arc-shaped groove; Along the width direction of the rotating mechanism, the central axes of the first arc-shaped groove, the first main sliding part, and the second main sliding part all coincide; along the length direction of the rotating mechanism, the size of the first arc-shaped groove is larger than the size of the first main sliding part, and the size of the first arc-shaped groove is larger than the size of the second main sliding part.

2. The swivel mechanism of claim 1, wherein Along the length of the rotating mechanism, the central axis of the first arc-shaped groove and the first support surface coincide.

3. A swivel mechanism according to claim 1 or 2, characterized in that The first door panel includes an end portion and a middle portion, which are connected along the length of the rotating mechanism; at least a portion of the first arc-shaped groove is located at the end portion; the width of the first arc-shaped groove gradually increases from the middle portion to the end portion.

4. A swivel mechanism according to claim 1 or 2, characterized in that The first door panel includes an end portion and a middle portion, which are connected along the length of the rotating mechanism; at least a portion of the first arc-shaped groove is located in the middle portion; the width of the first arc-shaped groove gradually decreases from the central axis to one end of the first arc-shaped groove.

5. The swivel mechanism according to claim 1 or 2, characterized in that The first support surface is also recessed with a transition groove. Along the length direction of the rotating mechanism, the transition groove communicates with the first arc-shaped groove, and the depth of the transition groove gradually changes so as to make a smooth transition between the first arc-shaped groove and the first support surface.

6. The swivel mechanism of claim 5, wherein, The transition groove includes a first transition groove. Along the length of the rotating mechanism, the first transition groove and the first arc-shaped groove are arranged sequentially. The central axes of the first transition groove and the first arc-shaped groove coincide. The depth of the first transition groove gradually decreases. The deepest position of the first transition groove is connected to the first arc-shaped groove. The deepest position of the first transition groove is the same as the depth of the first arc-shaped groove.

7. The swivel mechanism of claim 6, wherein, Along the length of the rotating mechanism, the width of the first transition groove gradually decreases, and the width of the first arc-shaped groove gradually decreases; the widest position of the first transition groove is connected to the narrowest position of the first arc-shaped groove, and the width dimensions of the widest position of the first transition groove and the narrowest position of the first arc-shaped groove are the same.

8. The swivel mechanism of claim 7, wherein, The first support surface is also provided with a second transition groove. Along the length direction of the rotating mechanism, the second transition groove is located on the side of the first arc groove away from the first transition groove. The second transition groove penetrates the end face of the first door panel. The central axis of the second transition groove and the first arc groove coincide. The depth of the second transition groove gradually decreases. The shallowest position of the second transition groove is connected to the first arc groove.

9. The swivel mechanism of claim 8, wherein, Along the length of the rotating mechanism, the width of the second transition groove gradually decreases; the narrowest position of the second transition groove is connected to the widest position of the first arc-shaped groove, and the width of the narrowest position of the second transition groove is the same as that of the widest position of the first arc-shaped groove.

10. The rotating mechanism according to claim 5, characterized in that, The transition groove includes a third transition groove. Along the length of the rotating mechanism, the third transition groove and the first arc-shaped groove are arranged sequentially. The central axis of the third transition groove coincides with that of the first arc-shaped groove, and the depth of the third transition groove gradually decreases. The deepest position of the third transition groove is connected to the first arc-shaped groove. The deepest position of the third transition groove is the same as the depth of the first arc-shaped groove.

11. The rotating mechanism according to claim 10, characterized in that, Along the length of the rotating mechanism, the width of the third transition groove gradually decreases, and the width of the first arc-shaped groove gradually decreases from the middle to both ends; the widest position of the third transition groove is connected to the narrowest position of the first arc-shaped groove, and the width of the widest position of the third transition groove is the same as the width of the narrowest position of the first arc-shaped groove.

12. The rotating mechanism according to claim 1 or 2, characterized in that, Along the length of the rotating mechanism, the size of the first arc-shaped groove is A, the size of the first main sliding part is B, and the size of the second main sliding part is C. A, B, and C satisfy the following relationship: B = C = A + 0.1 mm.

13. The rotating mechanism according to claim 1 or 2, characterized in that, There are multiple first swing arm groups and multiple first arc grooves, and the multiple first swing arm groups and multiple first arc grooves correspond one-to-one; the first support surface is also provided with a second arc groove, and along the length direction of the rotating mechanism, the second arc groove is provided between any two adjacent first arc grooves.

14. The rotating mechanism according to claim 13, characterized in that, The width of the first arc-shaped groove gradually changes, and the narrowest point of the first arc-shaped groove is connected to the second arc-shaped groove. The width of the second arc-shaped groove is the same as the width of the narrowest point of the first arc-shaped groove. Multiple first arc-shaped grooves and multiple second arc-shaped grooves are connected to form a total arc-shaped groove, which penetrates the first door panel along the length direction of the rotating mechanism.

15. The rotating mechanism according to claim 13, characterized in that, The second arc-shaped groove is equipped with a buffer pad.

16. A foldable electronic device, characterized in that, The device includes a first housing, a second housing, a display screen, and a rotating mechanism as described in any one of claims 1 to 15; the display screen includes a bendable portion; the display screen is disposed in the first housing, the rotating mechanism, and the second housing; when the foldable electronic device is in a folded state, the bendable portion is in a bent state, and a portion of the bendable portion is located within the first arcuate groove.

17. The foldable electronic device according to claim 16, characterized in that, The arc length of the widest position of the first arc groove is L; when the foldable electronic device is in a folded state, the radius R of the circle containing the area of ​​the flexible part corresponding to the widest position of the first arc groove is L greater than R.

18. The foldable electronic device according to claim 17, characterized in that, The arc length L and the radius R satisfy the following relationship: L = R + 0.3 mm.

19. The foldable electronic device according to any one of claims 16 to 18, characterized in that, The first arc-shaped groove includes a first concave arc surface. When the rotating mechanism is in a folded state, the flexible part is parallel to the first concave arc surface, and there is a first gap between the flexible part and the first concave arc surface.

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