Rotating shaft mechanism and foldable electronic equipment

Abstract

The invention relates to the technical field of foldable electronic equipment, provides a rotating shaft mechanism and foldable electronic equipment, and can solve the problem that the rotating shaft mechanism is easy to move and stop after the foldable electronic equipment falls off in the related technology. The rotating shaft mechanism comprises a base and a swing arm assembly connected to the base. The swing arm assembly comprises a first swing arm, a second swing arm, a supporting plate and a connecting piece, and the connecting piece is slidably connected with the first swing arm; a sliding part and a first stopping part are arranged on the second swing arm, the sliding part is located on the back side of the supporting plate, and the first stopping part is arranged at the end, close to the base, of the second swing arm and used for stopping the supporting plate at the position of the first stopping part; a first receding groove used for receding the connecting piece is formed between the first stopping part and the sliding part, a second stopping part is further arranged at the position of the first receding groove, and the second stopping part is used for stopping the supporting plate so as to prevent the supporting plate from being inserted into the first receding groove. The method can be applied to electronic equipment such as a mobile phone.

Description

Hinge mechanism and foldable electronic device Technical Field

[0001] The present application relates to the technical field of foldable electronic devices, and in particular to a hinge mechanism and a foldable electronic device. Background Art

[0002] Foldable electronic devices, such as foldable phones and tablets, are increasingly popular among users due to their large display area when flattened and compact size when folded. However, foldable devices are subject to drops during use, and ensuring they remain functional after a drop has become a key issue in the industry.

[0003] A foldable electronic device in the related art includes a display screen, two housings, and a hinge mechanism. The housings support the display screen, and the hinge mechanism is disposed at the junction of the two housings and is connected to each of the housings to enable the two housings to switch between an unfolded state and a folded state. However, when the foldable electronic device in the related art is in the folded state and falls, the moving parts of the hinge mechanism may move relative to each other due to inertia, causing misalignment between the moving parts. This can easily cause the hinge mechanism to jam, thereby preventing the foldable electronic device from unfolding properly.

[0004] Utility Model Content

[0005] Embodiments of the present application provide a hinge mechanism and a foldable electronic device, which are used to solve the problem in the related art that the hinge mechanism of the foldable electronic device is prone to motion lag after falling.

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

[0007] In a first aspect, an embodiment of the present application provides a hinge mechanism for a foldable electronic device, comprising a base and a swing arm assembly connected to the base, the swing arm assembly being movable relative to the base between an unfolded position and a folded position; the swing arm assembly comprising a first swing arm, a second swing arm, a support plate, and a connector, the first swing arm and the second swing arm being rotatably connected to the base, and the connector being slidably connected to the first swing arm; the front of the support plate is used to accommodate a display screen of the foldable electronic device, the back of the support plate being rotatably connected to the connector, and the back of the support plate being slidably connected to the first swing arm; the second swing arm is provided with a sliding portion and a first stop portion, the sliding portion being located on the back side of the support plate, the connector being slidable relative to the sliding portion in directions toward and away from the base, the first stop portion being located at an end of the second swing arm near the base and being used to stop the support plate at the position of the first stop portion; a first avoidance groove for avoiding the connector is formed between the first stop portion and the sliding portion, and a second stop portion is further provided at the position of the first avoidance groove, the second stop portion being used to stop the support plate to prevent the support plate from being inserted into the first avoidance groove.

[0008] The hinge mechanism in the embodiment of the present application is provided with a second stopper at the position of the first avoidance groove. Thus, when the swing arm assembly is in the folded position and falls, the second stopper can abut against the support plate to stop the support plate, thereby preventing the support plate from inserting into the first avoidance groove. This avoids the support plate from being stuck in the movement due to insertion into the first avoidance groove, and the swing arm assembly of the hinge mechanism can be normally unfolded, thereby ensuring that the foldable electronic device can be normally unfolded. At the same time, the first and second stopper stop the support plate, thereby preventing the support plate from being too close to the base, thereby preventing the support plate from excessively squeezing the space in the bending area accommodating the display screen, thereby ensuring that the bending area of ​​the display screen is not damaged due to excessive squeezing.

[0009] In some embodiments, the first stop and the sliding portion both protrude from the first side surface of the second swing arm, and the second stop is disposed between the first avoidance groove and the first side surface. The first stop, the second stop, and the sliding portion enclose the first avoidance groove. A flange is provided on an edge of the support plate near the base, the flange being configured to abut against the first stop. The distance L1 between the end of the flange near the first side surface and the first side surface is less than the distance L2 between the first avoidance groove and the first side surface. This arrangement increases the strength of the first stop, thereby reducing the risk of the first stop being broken by the support plate when the foldable electronic device is dropped.

[0010] In some embodiments, the first stop portion has a first stop surface on its side proximal to the support plate, and the second stop portion has a second stop surface on its side proximal to the support plate, with the second stop surface being flush with the first stop surface. This arrangement prevents the second stop surface from protruding beyond the first stop surface, thereby forming a raised platform structure. This prevents the flange of the foldable electronic device from colliding with the sharp corners of the raised platform structure and causing damage to the flange when it is dropped.

[0011] In some embodiments, the second stop portion further comprises a bottom surface disposed opposite to the second stop surface, the bottom surface being flush with the end of the sliding portion proximal to the base. With this arrangement, the second stop portion can better support the first stop portion, thereby reducing the risk of the first stop portion being broken by the support plate.

[0012] In some embodiments, the second stop portion is fixedly connected to the first side surface. In this way, the second stop portion can better support the first stop portion, and the risk of the first stop portion being broken by the support plate can be further reduced.

[0013] In some embodiments, an edge of one end of the first avoidance groove close to the first side surface is chamfered, thereby reducing the risk of the connecting member slipping and getting stuck.

[0014] In some embodiments, along the length of the base, the first side surfaces are located at opposite ends of the second swing arm, and each first side surface is provided with a first stop and a sliding portion. The support plate is provided with a plurality of flanges arranged along the length of the base, each flange being configured to abut a corresponding first stop. This arrangement can prevent the second swing arm from tilting.

[0015] In some embodiments, the first stopper, the second stopper, and the sliding portion are an integrated structure, which can reduce the number of components and facilitate the assembly of the second swing arm of the rotating shaft mechanism.

[0016] In some embodiments, the connecting member is provided with a first receiving groove, into which the second swing arm extends. A first sliding groove is provided on at least one side edge of the first receiving groove, with one end of the first sliding groove being closer to the base and the other end being further away from the base. The sliding portion slides in engagement with the first sliding groove. This arrangement allows for smoother sliding of the connecting member relative to the second swing arm.

[0017] In some embodiments, the connector is provided with a second receiving slot and a second sliding slot. The second receiving slot is for the end of the first swing arm away from the base to extend into. The second sliding slot is located at the edge of at least one side of the second receiving slot. The second sliding slot has a first end disposed near the support plate and a second end disposed away from the support plate. The distance from the first end to the rotation center of the first swing arm is greater than the distance from the second end to the rotation center of the first swing arm. The end of the first swing arm away from the base is provided with a sliding protrusion. The sliding protrusion slidably engages with the second sliding slot to enable the connector to be slidably connected to the first swing arm. This configuration reduces the space occupied by the first swing arm outside the connector and allows the distance between the ends of the two shells and the base to be adjusted, thereby allowing the hinge mechanism to well adapt to changes in the length of the first and second areas of the display screen when the display screen is folded and unfolded.

[0018] In some embodiments, a first curved piece is provided on the back of the support plate, and a first curved groove is provided on the connecting member. The first curved piece is located at the end of the support plate along the length of the base. The first curved piece and the first curved groove slidably engage to rotatably connect the back of the support plate to the connecting member. This arrangement prevents the first curved piece from occupying the space otherwise reserved for the first and second swing arms.

[0019] In some embodiments, a slide member is provided on the back of the support plate, and a third slide member is provided on the slide member. The third slide member is inclined relative to the thickness direction of the support plate, and has a first end located closer to the base and a second end located further away from the base. The distance between the first end and the support plate is greater than the distance between the second end and the support plate. A sliding fitting is provided on the first swing arm, and the sliding fitting slidably engages with the third slide member to slidably connect the back of the support plate to the first swing arm. This configuration can reduce the space occupied by the third slide member on the first swing arm, thereby making the first swing arm more compact with respect to the support plate.

[0020] In some embodiments, a second escape groove is provided on the first swing arm, extending through the first swing arm. A slide member is provided within the second escape groove, and a sliding fitting serves as an axis, with both ends of the sliding fitting connected to opposite sides of the second escape groove. This arrangement can reduce the space occupied by the slide member outside the first swing arm and prevent the sliding fitting from occupying space outside the second escape groove.

[0021] In some embodiments, the first swing arm is provided with a second curved piece, and the base is provided with a second curved groove. The base includes a base body and a fixing member detachably connected to the base body. The second curved groove is formed between the base body and the fixing member. The second curved piece slidably engages with the second curved groove to rotatably connect the first swing arm to the base. This arrangement facilitates maintenance and replacement of the first swing arm.

[0022] In some embodiments, the base is connected to two opposing sides of the base, each of which is connected to a swing arm assembly. The second swing arms of the swing arm assemblies are connected via an even number of gears, so that the swing arm assemblies connected to the opposing sides of the base can move synchronously between the folded position and the unfolded position. This arrangement can ensure synchronous movement of the swing arm assemblies relative to the base.

[0023] In the second aspect, an embodiment of the present application provides a foldable electronic device, comprising a display screen, at least two shells, and the hinge mechanism of the first aspect, wherein the shell is used to support the display screen, the hinge mechanism is located at the junction of two adjacent shells, and a pair of swing arm assemblies of the hinge mechanism are respectively connected to the corresponding shells.

[0024] The beneficial effects of the electronic device in the embodiment of the present application are the same as the beneficial effects of the hinge mechanism in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a rotating shaft mechanism in the related art with one side of the swing arm assembly removed;

[0026] FIG2 is an exploded view of the rotating shaft mechanism shown in FIG1 ;

[0027] FIG3 is a schematic structural diagram of a second swing arm of the rotating shaft mechanism in FIG1 ;

[0028] FIG4 is an AA cross-sectional view of the rotating shaft mechanism in FIG1 with the base removed;

[0029] FIG5 is a schematic structural diagram of a foldable electronic device (mobile phone) in an unfolded state in some embodiments of the present application;

[0030] FIG6 is a schematic structural diagram of the foldable electronic device in FIG5 in a folded state;

[0031] FIG7 is an exploded view of the foldable electronic device in FIG6 ;

[0032] FIG8 is a sectional view taken along line BB of FIG6 (the support plate on one side of the rotating shaft mechanism is removed in the figure);

[0033] FIG9 is a schematic structural diagram of a rotating shaft mechanism in some embodiments of the present application;

[0034] FIG10 is a partial view of the swing arm assembly with one side of the rotating shaft mechanism in FIG9 removed;

[0035] FIG11 is an exploded view of the rotating shaft mechanism in FIG10 at a different viewing angle;

[0036] FIG12 is an exploded view of the rotating shaft mechanism in FIG10 from another perspective;

[0037] FIG13 is a schematic structural diagram of a connecting member of the rotating shaft mechanism shown in FIG10;

[0038] FIG14 is a schematic structural diagram of a second swing arm of the rotating shaft mechanism shown in FIG10 ;

[0039] FIG15 is a CC sectional view of the rotating shaft mechanism shown in FIG10;

[0040] FIG16 is a partial enlarged view of the rotating shaft mechanism shown in FIG10;

[0041] FIG17 is a partial enlarged view of point D in FIG16;

[0042] FIG18 is a schematic structural diagram of the second swing arm in FIG14 from another perspective;

[0043] FIG19 is a diagram showing the positional relationship among the first stopper, the second stopper, and the sliding portion in some other embodiments of the present application;

[0044] FIG20 is a second diagram showing the positional relationship among the first stopper, the second stopper, and the sliding portion in other embodiments of the present application;

[0045] FIG21 is a DD sectional view of the rotating shaft mechanism shown in FIG10;

[0046] FIG22 is a cross-sectional view taken along line EE of the rotating shaft mechanism 100 shown in FIG10 ;

[0047] FIG23 is a sectional view taken along line FF of the rotating shaft mechanism shown in FIG10 ;

[0048] FIG24 is a cross-sectional view of the rotating shaft mechanism shown in FIG9 . DETAILED DESCRIPTION

[0049] The technical solutions in some embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0050] As shown in Figures 1 and 2, Figure 1 is a schematic diagram of a hinge mechanism in the related art with one swing arm assembly 02 removed, and Figure 2 is an exploded view of the hinge mechanism shown in Figure 1. This hinge mechanism is used in foldable electronic devices and includes a base 01 and a swing arm assembly 02 connected to the base 01 (only one swing arm assembly 02 is shown in the figure). The swing arm assembly 02 can move relative to the base 01 between an unfolded position and a folded position (as shown in Figure 1).

[0051] The swing arm assembly 02 includes a first swing arm 03, a second swing arm 04, a support plate 05 (also called a door panel), and a connector 06. Both the first and second swing arms 03 and 04 are rotatably connected to the base 01. Connector 06 is used to connect to the housing of the foldable electronic device. For example, connector 06 is provided with a connection hole 061, through which a fastener (such as a screw) is threadedly connected to the housing. Connector 06 is slidably connected to the first swing arm 03, for example, the end of the first swing arm 03 slides in a groove a on connector 06.

[0052] The front side 051 of the support plate 05 is used to set the display screen of the foldable electronic device, and the back side 052 of the support plate 05 is rotatably connected to the connecting member 06, for example, the arc-shaped piece 053 on the back side 052 of the support plate 05 slides with the arc-shaped groove 062 on the connecting member 06 to realize the rotational connection between the support plate 05 and the connecting member 06; and the back side 052 of the support plate 05 is also slidably connected to the first swing arm 03, for example, the slide groove b set on the back side 052 of the support plate 05 slides with the slide shaft 031 set on the first swing arm 03 to realize the sliding connection between the support plate 05 and the first swing arm 03.

[0053] As shown in Figures 1, 3, and 4, Figure 3 is a schematic structural diagram of the second swing arm 04 of the rotating shaft mechanism in Figure 1, and Figure 4 is an AA cross-sectional view of the rotating shaft mechanism in Figure 1 with the base 01 removed. The second swing arm 04 is provided with a sliding portion 041 and a first stop portion 042. The sliding portion 041 is located on the back side of the support plate 05. The connecting member 06 can slide relative to the sliding portion 041 in directions toward and away from the base 01. The first stop portion 042 is located at the end of the second swing arm 04 close to the base 01 and is used to stop the supporting plate 05 at the position of the first stop portion 042 to limit the distance between the supporting plate 05 and the base 01. A clearance groove 043 is formed between the first stop portion 042 and the sliding portion 041 for avoiding the connecting member 06.

[0054] As shown in Figures 1 and 4, when the swing arm assembly 02 is in the folded position, there is a fitting gap between the support plate 05 and the connecting member 06 and the first swing arm 03, and there is also a fitting gap between the first swing arm 03 and the base 01. When the foldable electronic device falls, under the action of inertia, the flange 054 of the support plate 05 moves toward the direction close to the base 01 (that is, the downward direction in Figure 4), and after hitting the first stop part 042, it is easily inserted into the avoidance groove 043, thereby causing the support plate 05 to jam, and thus making the foldable electronic device unable to unfold normally.

[0055] To this end, an embodiment of the present application provides a hinge mechanism and a foldable electronic device, in which a second stop portion is provided at the avoidance groove of the second swing arm to prevent the support plate from being inserted into the avoidance groove. In this way, when the foldable electronic device falls, the problem of movement jamming of the support plate of the hinge mechanism can be solved, thereby ensuring that the foldable electronic device can be unfolded normally.

[0056] The foldable electronic device in the embodiments of the present application can be a mobile phone, tablet computer, laptop computer, wearable device, or other electronic device. The following uses a mobile phone as an example to illustrate the specific structure of the hinge mechanism in the foldable electronic device. The hinge mechanism in other foldable electronic devices can be configured similarly to the hinge mechanism in the mobile phone embodiment, and will not be described in detail here.

[0057] Figure 5 is a structural schematic diagram of a foldable electronic device (mobile phone) in an unfolded state in some embodiments of the present application, Figure 6 is a structural schematic diagram of the foldable electronic device in Figure 5 in a folded state, Figure 7 is an exploded view of the foldable electronic device in Figure 6, and Figure 8 is a BB sectional view of Figure 6 (the support plate on one side of the hinge mechanism 100 is removed in the figure).

[0058] As shown in Figures 5, 6 and 7, the foldable electronic device in the embodiment of the present application includes a display screen 200, two shells 300 and a hinge mechanism 100. The shell 300 is used to support the display screen 200. The hinge mechanism 100 is arranged at the junction of the two shells 300 so that the two shells 300 can switch between an unfolded state (as shown in Figure 5) and a folded state (as shown in Figure 6).

[0059] The display screen 200 is inherently flexible and can bend and deform under external force. As shown in Figure 5 , when the two housings 300 are in the unfolded state, the display screen 200 is unfolded, exposing the display area of ​​the display screen 200 to facilitate displaying image information to the user. The display screen 200 includes a first area 210 and two second areas 220 located on opposite sides of the first area 210. The first area 210 covers the hinge mechanism 100, and the second area 220 covers the display screen support surface 310 of the housing 300.

[0060] Among them, the display screen 200 can be a completely flexible screen structure, for example, the first area 210 and the second area 220 of the display screen 200 are both flexible screen structures; of course, the display screen 200 can also have a flexible screen structure in the middle folding part and a hard screen structure on both sides, for example, the first area 210 of the display screen 200 is a flexible screen structure, and the second area 220 is a hard screen structure.

[0061] As shown in Figures 6 and 8, when the two shells 300 are in a folded state, the display screen 200 is folded between the two shells 300, and the two second areas 220 of the display screen 200 are stacked, and the first area 210 is folded into a teardrop shape. Here, "stacked" means that the two second areas 220 are superimposed in the thickness direction, and the thickness directions of the two second areas 220 are parallel or approximately parallel (for example, the deviation is within 10°), wherein the two stacked second areas 220 can be attached together, or there can be a gap between the first area 210 and the second area 220, which is not specifically limited here. The above-mentioned first area 210 is not limited to being folded into a teardrop shape, and can also be folded into other shapes.

[0062] The foldable electronic device in the embodiment of the present application is not limited to having two shells 300, but may also have more than two shells 300, such as three shells 300, etc. Two adjacent shells 300 can be switched between the unfolded state and the folded state, and the hinge mechanism 100 is set at the junction of the two adjacent shells 300.

[0063] As shown in Figures 8 and 9, Figure 9 is a schematic structural diagram of a hinge mechanism 100 in some embodiments of the present application. The hinge mechanism 100 includes a base 1 and a swing arm assembly 2 connected to the base 1. The swing arm assembly 2 can move relative to the base 1 between an unfolded position and a folded position (as shown in Figures 8 and 9).

[0064] Specifically, the swing arm assembly 2 is respectively connected to the opposite sides of the base 1, and each swing arm assembly 2 is respectively connected to the corresponding shell 300. For example, as shown in Figure 8, the swing arm assembly 2 connected to the left side of the base 1 is connected to the shell 300 located on the left side, and the swing arm assembly 2 connected to the right side of the base 1 is connected to the shell 300 located on the right side.

[0065] Specifically, the swing arm assemblies 2 are connected to opposite sides of the base 1. Specifically, the swing arm assemblies 2 are connected to opposite sides of the base 1. For example, as shown in FIG8 , one swing arm assembly 2 is connected to the left side of the base 1, and the other swing arm assembly 2 is connected to the right side of the base 1. In some embodiments, as shown in FIG8 , the swing arm assemblies 2 are symmetrically distributed on both sides of the midplane 10 of the base 1 along the width direction X thereof.

[0066] As shown in Figures 9 to 12, Figure 10 is a partial view of the swing arm assembly 2 with one side of the rotating shaft mechanism 100 in Figure 9 removed, Figure 11 is an exploded view of the rotating shaft mechanism 100 in Figure 10 from one perspective, and Figure 12 is an exploded view of the rotating shaft mechanism 100 in Figure 10 from another perspective. The swing arm assembly 2 includes a first swing arm 3, a second swing arm 4, a support plate 5, and a connector 6. The first swing arm 3 and the second swing arm 4 are both rotatably connected to the base 1. The connector 6 is connected to the housing 300 of the foldable electronic device. For example, the connector 6 can be threadedly connected to the housing 300 using a fastener (such as a screw). The connector 6 is provided with a connection hole 60 for the fastener to pass through. The connector 6 is also slidably connected to the first swing arm 3.

[0067] The front side 51 of the support plate 5 is used to set the display screen 200 of the foldable electronic device. The back side 52 of the support plate 5 is rotatably connected to the connecting member 6 and is also slidably connected to the first swing arm 3 .

[0068] As shown in Figures 13, 14, and 15, Figure 13 is a schematic structural diagram of the connector 6 of the hinge mechanism 100 shown in Figure 10, Figure 14 is a schematic structural diagram of the second swing arm 4 of the hinge mechanism 100 shown in Figure 10, and Figure 15 is a CC cross-sectional view of the hinge mechanism 100 shown in Figure 10. The second swing arm 4 is provided with a sliding portion 41, which is located on the back side of the support plate 5 (i.e., the side of the support plate 5 away from the display screen 200). The connector 6 can slide relative to the sliding portion 41 in directions toward and away from the base 1.

[0069] In some embodiments, as shown in Figures 13, 14 and 15, a first accommodating groove 61 is provided on the connecting member 6, and the second swing arm 4 extends into the first accommodating groove 61. The first accommodating groove 61 has a first sliding groove 62 at both side edges (or one side edge). One end of the first sliding groove 62 is close to the base 1, and the other end is away from the base 1. The sliding portion 41 slides in cooperation with the first sliding groove 62.

[0070] By extending the second swing arm 4 into the first accommodating groove 61 , the structure between the second swing arm 4 and the connecting member 6 can be made more compact, thereby reducing the space occupied by the second swing arm 4 outside the connecting member 6 .

[0071] By slidingly cooperating with the sliding portion 41 and the first sliding groove 62, the first sliding groove 62 and the sliding portion 41 play a role of mutual limitation, reducing the shaking of the connecting member 6 during the sliding process relative to the second swing arm 4, thereby making the sliding of the connecting member 6 relative to the second swing arm 4 more stable.

[0072] As shown in FIG14 , the sliding portion 41 and the second swing arm 4 are an integral structure, but the present invention is not limited thereto. The sliding portion 41 and the second swing arm 4 may also be designed as separate bodies.

[0073] In some embodiments, as shown in FIG14 , the sliding portion 41 is a rib, but is not limited thereto, and the sliding portion 41 may also be configured as other structures.

[0074] As shown in Figures 14, 15, and 16 (Figure 16 is a partial enlarged view of the rotating shaft mechanism 100 shown in Figure 10), the second swing arm 4 is provided with a first stopper 42. The first stopper 42 is located at the end of the second swing arm 4 close to the base 1 and is used to stop the support plate 5 at the position of the first stopper 42 to limit the distance between the support plate 5 and the base 1.

[0075] A first avoidance groove 43 for avoiding the connecting member 6 is formed between the first stop portion 42 and the sliding portion 41 . A second stop portion 44 is also provided at the position of the first avoidance groove 43 . The second stop portion 44 is used to stop the support plate 5 to prevent the support plate 5 from being inserted into the first avoidance groove 43 .

[0076] The hinge mechanism 100 in the embodiment of the present application is provided with a second stopper 44 at the position of the first avoidance groove 43. In this way, when the swing arm assembly 2 is in the folded position and falls, the second stopper 44 can abut against the support plate 5 to stop the support plate 5, thereby preventing the support plate 5 from being inserted into the first avoidance groove 43. In this way, the swing arm assembly 2 of the hinge mechanism 100 can be normally unfolded, thereby ensuring that the foldable electronic device can be normally unfolded. At the same time, the first stopper 42 and the second stopper 44 stop the support plate 5, thereby preventing the support plate 5 from being too close to the base 1, as shown in Figure 8. In this way, the support plate 5 is prevented from excessively squeezing the space of the bending area (i.e., the first area 210) that accommodates the display screen, thereby ensuring that the bending area of ​​the display screen is not damaged due to excessive squeezing.

[0077] It should be noted that: when the swing arm assembly 2 moves normally between the folded position and the unfolded position, the support plate 5 will abut against the first stop portion 42 and will not abut against the second stop portion 44. When the swing arm assembly 2 is in the folded position and the foldable electronic device falls, due to the impact of inertia, the support plate 5 will move to the position of the second stop portion 44 and abut against the second stop portion 44. The second stop portion 44 prevents the support plate 5 from being inserted into the first avoidance groove 43.

[0078] In some embodiments, as shown in Figure 14, the first stop portion 42 and the sliding portion 41 both protrude from the first side surface 40 of the second swing arm 4, and the second stop portion 44 is arranged between the first avoidance groove 43 and the first side surface 40. The first stop portion 42, the second stop portion 44 and the sliding portion 41 form the first avoidance groove 43.

[0079] As shown in Figures 16 and 17, Figure 17 is a partial enlarged view of point D in Figure 16. A flange 53 is provided on one side edge of the support plate 5 near the base 1. The flange 53 is used to abut against the first stopper 42. The distance L1 between the end of the flange 53 near the first side surface 40 and the first side surface 40 is less than the distance L2 between the first avoidance groove 43 and the first side surface 40. As shown in Figure 17, the distance L1 between the first avoidance groove 43 and the first side surface 40 is the distance from the side wall of the first avoidance groove 43 near the first side surface 40 to the first side surface 40.

[0080] By setting the distance L1 from the flange 53 to the first side 40 to be smaller than the distance L2 between the first avoidance groove 43 and the first side 40, when the foldable electronic device falls, the second stop portion 44 can be located on the movement trajectory of the flange 53, so that the second stop portion 44 can stop the flange 53, thereby preventing the support plate 5 from being inserted into the first avoidance groove 43.

[0081] By arranging the second stop portion 44 between the first avoidance groove 43 and the first side surface 40, and the first stop portion 42, the second stop portion 44 and the sliding portion 41 form the first avoidance groove 43, the second stop portion 44 supports and strengthens the first stop portion 42, thereby increasing the strength of the first stop portion 42, thereby reducing the risk of the first stop portion 42 being broken by the support plate 5 when the foldable electronic device falls.

[0082] In some embodiments, as shown in Figures 16 and 17 , the first stop portion 42 has a first stop surface 421 on its side near the support plate 5, and the second stop portion 44 has a second stop surface 441 on its side near the support plate 5. The second stop surface 441 is flush with the first stop surface 421. This arrangement prevents the second stop surface 441 from protruding beyond the first stop surface 421 to form a boss structure. This prevents the flange 53 from colliding with the sharp corners of the boss structure and causing damage to the flange 53 when the foldable electronic device is dropped.

[0083] In some embodiments, as shown in Figures 16 and 18 (Figure 18 is a schematic structural diagram of the second swing arm 4 in Figure 14 from another perspective), the second stop portion 44 further includes a bottom surface 442 disposed opposite the second stop surface 441. The bottom surface 442 is flush with the end of the sliding portion 41 proximal to the base 1 (i.e., the bottom end of the sliding portion 41 shown in Figure 18). This arrangement increases the dimension of the second stop portion 44 in the groove depth direction Z of the first avoidance groove 43. This allows the second stop portion 44 to better support the first stop portion 42, thereby increasing the strength of the first stop portion 42 and reducing the risk of the first stop portion 42 being broken by the support plate 5 when the foldable electronic device falls.

[0084] In some embodiments, as shown in Figures 16 and 17, the second stopper 44 is fixedly connected to the first side surface 40. In this manner, the second stopper 44 can better support the first stopper 42, thereby increasing the strength of the first stopper 42. This can further reduce the risk of the first stopper 42 being broken by the support plate 5 when the foldable electronic device falls.

[0085] Of course, in addition to being fixedly connected to the first side surface 40, the second stop portion 44 can also be spaced apart from the first side surface 40, as shown in FIG19 , which is a diagram showing the positional relationship between the first stop portion 42, the second stop portion 44, and the sliding portion 41 in some other embodiments of the present application. The second stop portion 44 can also be a stop wall disposed between the first stop portion 42 and the sliding portion 41.

[0086] In some embodiments, as shown in Figures 16 and 17 , the first stopper 42, the second stopper 44, and the sliding portion 41 are integrally formed. This configuration can reduce the number of components, thereby facilitating the assembly of the second swing arm 4 of the shaft mechanism 100.

[0087] Of course, the second stop portion 44 may also be designed separately from the first stop portion 42 and the sliding portion 41 , and the second stop portion 44 is assembled with the first stop portion 42 and the sliding portion 41 .

[0088] In some embodiments, as shown in FIG17 , a chamfer 431 is provided on one edge of the first avoidance groove 43 near the first side surface 40. With this arrangement, when the connector 6 shakes and there is a slight misalignment between the first avoidance groove 43 and the connector 6, the chamfer 431 at the edge of the first avoidance groove 43 can guide the connector 6, allowing the connector 6 to slide into the first avoidance groove 43 via the chamfer 431, thereby reducing the risk of the connector 6 sliding and getting stuck.

[0089] In some embodiments, as shown in Figures 14, 15, and 16, along the length direction Y of the base 1, the first side surfaces 40 are located at opposite ends of the second swing arm 4, and each first side surface 40 is provided with a first stop 42 and a sliding portion 41. The support plate 5 is provided with a plurality of flanges 53, which are arranged along the length direction Y of the base 1, and each flange 53 is configured to abut a corresponding first stop 42. With this arrangement, if the foldable electronic device falls, the first stop 42 at each end of the second swing arm 4 will collide with the flange 53 of the support plate 5, thereby maintaining a force balance on the second swing arm 4 and preventing the second swing arm 4 from tilting.

[0090] In the rotating shaft mechanism 100 in the embodiment of the present application, the second stop portion 44 may be set at other positions in addition to the above-mentioned settings, as shown in Figure 20. Figure 20 is a second diagram of the positional relationship between the first stop portion 42, the second stop portion 44 and the sliding portion 41 in other embodiments of the present application. The second stop portion 44 is arranged on the first stop portion 42 and protrudes from the surface of the first stop portion 42. The second stop portion 44 is located at the edge of the first avoidance groove 43. As shown in Figure 20, the second stop portion 44 is a convex rib, but it is not limited to this. The second stop portion 44 may also be a stop column, a stop block, etc., which is not specifically limited here. The number of the second stop portions 44 may be one or more, which is not specifically limited here.

[0091] In some embodiments, as shown in Figures 10, 11 and 13, a second accommodating groove 63 is provided on the connecting member 6, and the second accommodating groove 63 is for the end of the first swing arm 3 away from the base 1 to extend into, and the second accommodating groove 63 has second sliding grooves 64 at both side edges (or one side edge).

[0092] As shown in Figures 12, 13, and 21, Figure 21 is a DD cross-sectional view of the rotating shaft mechanism 100 shown in Figure 10. The second slide groove 64 has a first end c1 disposed near the support plate 5 and a second end c2 disposed away from the support plate 5. The distance from the first end c1 to the rotation center O1 of the first swing arm 3 is greater than the distance from the second end c2 to the rotation center O1 of the first swing arm 3. A sliding protrusion 31 is provided on the end of the first swing arm 3 away from the base 1. The sliding protrusion 31 slidably engages with the second slide groove 64 to slidingly connect the connector to the first swing arm 3.

[0093] As shown in Figures 11 and 12 , the sliding protrusion 31 is a bump provided on the first swing arm 3, but the present invention is not limited thereto and the sliding protrusion 31 may be provided in other structures. As shown in Figure 21 , the distance from the first end c1 and the second end c2 to the rotation center O1 of the first swing arm 3 may be the distance from the first end c1 and the second end c2 of a side wall of the second chute 64 (e.g., wall 641 or wall 642) to the rotation center O1 of the first swing arm 3.

[0094] By extending the end of the first swing arm 3 into the second receiving groove 63, the structure between the first swing arm 3 and the connecting member 6 can be made more compact, reducing the space occupied by the first swing arm 3 outside the connecting member 6. By setting the distance from the first end c1 to the rotation center O1 of the first swing arm 3 to be greater than the distance from the second end c2 to the rotation center O1 of the first swing arm 3, when the swing arm assembly 2 moves between the unfolded position and the folded position, the connecting member 6 can move closer to and away from the base 1 under the action of the sliding protrusion 31. In this way, the distance between the ends of the two shells 300 (such as the end a shown in Figure 5) and the base 1 can be adjusted, so that the hinge mechanism 100 can adapt well to the changes in the length of the first area 210 and the second area 220 of the display screen 200 when the display screen 200 is folded and unfolded, thereby preventing the display screen 200 from being pulled by the shell 300 during the unfolding and folding processes.

[0095] In some embodiments, as shown in Figures 11, 12, and 22, Figure 22 is a cross-sectional view taken along line EE of the rotating shaft mechanism 100 shown in Figure 10. A first curved piece 54 is provided on the back surface 52 of the support plate 5, and a first curved groove 65 is provided on the connecting member 6. Along the length direction Y of the base 1, the first curved piece 54 is located at the end of the support plate 5. The first curved piece 54 and the first curved groove 65 are slidably engaged to enable the back surface 52 of the support plate 5 to be rotatably connected to the connecting member 6. By disposing the first curved piece 54 at the end of the support plate 5, the first curved piece 54 can be prevented from occupying the space for disposing the first swing arm 3 and the second swing arm 4, thereby facilitating an optimized layout of the positions between the first swing arm 3, the second swing arm 4, and the connecting member 6.

[0096] As shown in FIG22 , the first arc-shaped piece 54 and the support plate 5 are an integral structure, but the present invention is not limited thereto. The first arc-shaped piece 54 and the support plate 5 may also be separately provided, and the first arc-shaped piece 54 and the support plate 5 are assembled together.

[0097] Of course, the first arc-shaped piece 54 may also be arranged at the middle position of the support plate 5 along the length direction Y of the base 1 according to actual conditions.

[0098] In some embodiments, as shown in Figures 10, 12, and 23, Figure 23 is a sectional view (FF) of the rotating shaft mechanism 100 shown in Figure 10. A sliding groove 55 is provided on the back surface 52 of the support plate 5. A third sliding groove 551 is arranged obliquely relative to the thickness direction H of the support plate 5. The third sliding groove 551 has a first groove end c3 disposed near the base 1 and a second groove end c4 disposed away from the base 1. The distance from the first groove end c3 to the support plate 5 is greater than the distance from the second groove end c4 to the support plate 5. The sliding fitting 32 on the first swing arm 3 slidably cooperates with the third sliding groove 551 to ensure a sliding connection between the back surface 52 of the support plate 5 and the first swing arm 3.

[0099] By tilting the third slide groove 551 relative to the thickness direction H of the support plate 5, the distance from the first groove end c3 to the support plate 5 is greater than the distance from the second groove end c4 to the support plate 5. With this arrangement, when the swing arm assembly 2 moves between the unfolded position and the folded position, the sliding accessory 32 can slide along the tilted third slide groove 551, so that the support plate 5 can swing with the first swing arm 3, thereby supporting the first area 210 of the display screen 200.

[0100] At the same time, compared with setting the third slide groove 551 on the first swing arm 3, by setting the slide groove member 55 on the back side of the support plate 5, the space occupied by the third slide groove 551 on the first swing arm 3 can be reduced. In the width direction X of the base 1, the size of the first swing arm 3 can be reduced, so that the first swing arm 3 and the support plate 5 are more compact.

[0101] In some embodiments, as shown in Figures 12 and 23, a second avoidance groove 33 is provided on the first swing arm 3, the second avoidance groove 33 passes through the first swing arm 3, the slide member 55 is passed through the second avoidance groove 33, the sliding fitting 32 is an axis, and the two ends of the sliding fitting 32 are respectively connected to the groove walls on opposite sides of the second avoidance groove 33.

[0102] By inserting the slide member 55 into the second avoidance groove 33, the space occupied by the slide member 55 outside the first swing arm 3 can be reduced, thereby making the first swing arm 3 and the support plate 5 more compact. By configuring the sliding fitting 32 as an axis, and connecting the two ends of the sliding fitting 32 to the groove walls on opposite sides of the second avoidance groove 33, the sliding fitting 32 can be prevented from occupying space outside the second avoidance groove 33, thereby making the sliding fitting 32 and the first swing arm 3 more compact, thereby helping to reduce the space occupied by the hinge mechanism 100 on the foldable electronic device.

[0103] As shown in FIG23 , the slide member 55 and the support plate 5 are an integrated structure, but the present invention is not limited thereto. The slide member 55 and the support plate 5 may also be separately provided, and the slide member 55 and the support plate 5 are assembled together.

[0104] In some embodiments, as shown in Figures 10 and 21, a second arc-shaped piece 34 is provided on the first swing arm 3, and a second arc-shaped groove 11 is provided on the base 1. The base 1 includes a base body 12 and a fixing member 13 detachably connected to the base body 12. The second arc-shaped groove 11 is formed between the base body 12 and the fixing member 13. The second arc-shaped piece 34 slidably cooperates with the second arc-shaped groove 11 to enable the first swing arm 3 to be rotatably connected to the base 1.

[0105] By detachably connecting the fixing member 13 to the base body 12 , when the second arc-shaped piece 34 of the first swing arm 3 is damaged, the fixing member 13 can be detached from the base body 12 , thereby facilitating the repair and replacement of the first swing arm 3 .

[0106] As shown in FIG21 , the second curved piece 34 and the first swing arm 3 are integrally formed, but the present invention is not limited thereto. The second curved piece 34 and the first swing arm 3 may also be provided separately, and the second curved piece 34 and the first swing arm 3 may be assembled together. As shown in FIG21 , the fixing member 13 and the base body 12 may be detachably connected by fasteners (such as screws), but the present invention is not limited thereto. The fixing member 13 may also be detachably connected to the base body 12 by means of clamping, bonding, or the like.

[0107] In some embodiments, as shown in FIG21 , the base 1 further includes a shaft cover 14, which is located on the back side of the base body 12 (i.e., the side away from the display screen 200). The shaft cover 14 is a cosmetic component of the foldable electronic device and can cover components such as the base body 12 to ensure the appearance of the hinge mechanism 100 when the foldable electronic device is folded.

[0108] The shaft cover 14 and the base body 12 can be detachably connected by fasteners (such as screws), but it is not limited thereto. The shaft cover 14 can also be detachably connected to the base body 12 by means of snap connection, bonding, etc.

[0109] In some embodiments, as shown in FIG24 , which is a GG cross-sectional view of the rotating shaft mechanism 100 shown in FIG9 , the second swing arms 4 of the swing arm assemblies 2 are connected to each other via an even number of gears 7, so that the swing arm assemblies 2 connected to opposite sides of the base 1 can move synchronously relative to the base 1 between the folded position and the unfolded position.

[0110] By connecting an even number of gears 7 between the second swing arms 4 of the swing arm assembly 2, when the second swing arm 4 of the swing arm assembly 2 on one side rotates a certain angle relative to the base 1, the second swing arm 4 can transmit power to the second swing arm 4 of the swing arm assembly 2 on the other side through the even number of gears 7, so that the second swing arm 4 of the swing arm assembly 2 on the other side also rotates the same angle relative to the base 1, thereby realizing the synchronous rotation of the second swing arms 4 on both sides relative to the base 1, and then making the swing arm assembly 2 move synchronously relative to the base 1.

[0111] In some embodiments, as shown in Figure 24, the number of gears 7 transmission-connected between the second swing arms 4 is four, the four gears 7 are rotatably connected to the base 1, and two adjacent gears 7 are meshed, wherein the two outermost gears 7 are fixedly connected to the corresponding second swing arms 4.

[0112] The number of gears 7 connected to the second swing arms 4 is not limited to four, and may also be two, six, or eight, depending on the actual situation. When there are two gears 7, each gear 7 is fixedly connected to a corresponding second swing arm 4. The gears 7 fixedly connected to the second swing arm 4 may be integral with the second swing arm 4 (as shown in FIG. 24 ) or separate from the second swing arm 4, depending on the actual situation.

[0113] The even-numbered gears 7 connected to the second swing arm 4 can all be partial gears, all be complete gears, or a combination of partial and complete gears, without specific limitation. For example, as shown in FIG24 , of the four gears 7 , the two outermost gears 7 are partial gears, and the two middle gears 7 are complete gears.

[0114] The incomplete gear means that teeth and tooth grooves are distributed on a part of the circumferential surface of the gear 7 in the circumferential direction; the complete gear means that teeth and tooth grooves are distributed on the entire circumferential surface of the gear 7 in the circumferential direction.

[0115] The types of hatching in the drawings of this application are for the purpose of distinguishing different components and should not be understood as limiting the materials of the components. The drawings of this application are for the purpose of illustrating the structural composition and are not shown to scale with the actual product.

[0116] Although the description of this application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to these embodiments. On the contrary, the purpose of introducing the application in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of this application. In order to provide a deep understanding of this application, the above description will contain many specific details. This application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of this application, some specific details will be omitted in the description. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other unless there is a conflict.

[0117] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of the features.

[0118] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0119] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of the present application, such as "up", "down", "left", "right", "inside", "outside", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0120] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hinge mechanism for a foldable electronic device, characterized in that: It comprises a base (1), and a swing arm assembly (2) connected to the base (1), wherein the swing arm assembly (2) can move relative to the base (1) between an unfolded position and a folded position; The swing arm assembly (2) comprises a first swing arm (3), a second swing arm (4), a support plate (5) and a connecting piece (6); the first swing arm (3) and the second swing arm (4) are both rotatably connected to the base (1); the connecting piece (6) is slidably connected to the first swing arm (3); the front side (51) of the support plate (5) is used to set the display screen (200) of the foldable electronic device; the back side (52) of the support plate (5) is rotatably connected to the connecting piece (6), and the back side (52) of the support plate (5) is also slidably connected to the first swing arm (3); The second swing arm (4) is provided with a sliding portion (41) and a first stop portion (42); the sliding portion (41) is located on the back side of the support plate (5); the connecting member (6) can slide relative to the sliding portion (41) in a direction approaching and moving away from the base (1); the first stop portion (42) is provided at an end of the second swing arm (4) close to the base (1) and is used to stop the support plate (5) at the position of the first stop portion (42); A first avoidance groove (43) for avoiding the connecting member (6) is formed between the first stopper (42) and the sliding portion (41), and a second stopper (44) is also provided at the position of the first avoidance groove (43), and the second stopper (44) is used to stop the support plate (5) to prevent the support plate (5) from being inserted into the first avoidance groove (43).

2. The rotating shaft mechanism according to claim 1, characterized in that: The first stopper (42) and the sliding part (41) both protrude from the first side surface (40) of the second swing arm (4); the second stopper (44) is arranged between the first avoidance groove (43) and the first side surface (40); the first stopper (42), the second stopper (44) and the sliding part (41) enclose the first avoidance groove (43); A flange (53) is provided at one side edge of the support plate (5) close to the base (1), and the flange (53) is used to abut against the first stop portion (42), and a distance L1 from an end of the flange (53) close to the first side surface (40) to the first side surface (40) is smaller than a distance L2 between the first avoidance groove (43) and the first side surface (40).

3. The rotating shaft mechanism according to claim 2, characterized in that: The first stop portion (42) has a first stop surface (421) on a side close to the support plate (5), and the second stop portion (44) has a second stop surface (441) on a side close to the support plate (5), and the second stop surface (441) is flush with the first stop surface (421).

4. The rotating shaft mechanism according to claim 3, characterized in that: The second stop portion (44) further comprises a bottom surface (442) disposed opposite to the second stop surface (441), and the bottom surface (442) is flush with an end of the sliding portion (41) close to the base (1).

5. The rotating shaft mechanism according to any one of claims 2 to 4, characterized in that: The second stop portion (44) is fixedly connected to the first side surface (40).

6. The rotating shaft mechanism according to any one of claims 2 to 5, characterized in that: An edge of one end of the first avoidance groove (43) close to the first side surface (40) is provided with a chamfer (431).

7. The rotating shaft mechanism according to any one of claims 2 to 6, characterized in that: Along the length direction (Y) of the base (1), the first side surfaces (40) are respectively located at the edges of the two opposite ends of the second swing arm (4), and each of the first side surfaces (40) is provided with the first stop portion (42) and the sliding portion (41); The support plate (5) is provided with a plurality of flanges (53), which are arranged along the length direction (Y) of the base (1), and each flange (53) is used to abut against the corresponding first stop portion (42).

8. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The first stop portion (42), the second stop portion (44) and the sliding portion (41) are an integrated structure.

9. The rotating shaft mechanism according to any one of claims 1 to 8, characterized in that: The connecting member (6) is provided with a first receiving groove (61), the second swing arm (4) extends into the first receiving groove (61), at least one side edge of the first receiving groove (61) is provided with a first sliding groove (62), one end of the first sliding groove (62) is close to the base (1), and the other end is far away from the base (1), and the sliding part (41) is slidably matched with the first sliding groove (62).

10. The rotating shaft mechanism according to any one of claims 1 to 9, characterized in that: The connecting member (6) is provided with a second receiving groove (63) and a second sliding groove (64), wherein the second receiving groove (63) is for the end of the first swing arm (3) away from the base (1) to extend into, and the second sliding groove (64) is located at the edge of at least one side of the second receiving groove (63), and the second sliding groove (64) has a first end (c1) arranged close to the support plate (5), and a second end (c2) arranged away from the support plate (5), and the distance from the first end (c1) to the rotation center of the first swing arm (3) is greater than the distance from the second end (c2) to the first The distance of the center of rotation of the swing arm (3); A sliding protrusion (31) is provided on the end of the first swing arm (3) away from the base (1), and the sliding protrusion (31) is slidably matched with the second sliding groove (64) so ​​that the connecting member (6) is slidably connected to the first swing arm (3).

11. The rotating shaft mechanism according to any one of claims 1 to 10, characterized in that: The back side (52) of the support plate (5) is provided with a first arc-shaped piece (54), and the connecting member (6) is provided with a first arc-shaped groove (65). Along the length direction (Y) of the base (1), the first arc-shaped piece (54) is located at the end of the support plate (5), and the first arc-shaped piece (54) and the first arc-shaped groove (65) are slidably matched so that the back side (52) of the support plate (5) and the connecting member (6) can be rotatably connected.

12. The rotating shaft mechanism according to any one of claims 1 to 11, characterized in that: A slide groove member (55) is provided on the back side (52) of the support plate (5), and a third slide groove (551) is provided on the slide groove member (55), and the third slide groove (551) is arranged obliquely relative to the thickness direction (H) of the support plate (5), and the third slide groove (551) has a first groove end (c3) arranged close to the base (1), and a second groove end (c4) arranged away from the base (1), and the distance from the first groove end (c3) to the support plate (5) is greater than the distance from the second groove end (c4) to the support plate (5); The first swing arm (3) is provided with a sliding accessory (32), and the sliding accessory (32) is slidably matched with the third sliding groove (551) so that the back side (52) of the support plate (5) is slidably connected to the first swing arm (3).

13. The rotating shaft mechanism according to claim 12, characterized in that: The first swing arm (3) is provided with a second avoidance groove (33), the second avoidance groove (33) passes through the first swing arm (3), the slide member (55) is inserted into the second avoidance groove (33), the slide member (32) is an axis, and the two ends of the slide member (32) are respectively connected to the groove walls on two opposite sides of the second avoidance groove (33).

14. The rotating shaft mechanism according to any one of claims 1 to 13, characterized in that: The first swing arm (3) is provided with a second arc-shaped piece (34), the base (1) is provided with a second arc-shaped groove (11), the base (1) comprises a base (1) body, and a fixing member (13) detachably connected to the base (1) body, the second arc-shaped groove (11) is formed between the base (1) body and the fixing member (13), the second arc-shaped piece (34) is slidably matched with the second arc-shaped groove (11), so that the first swing arm (3) and the base (1) are rotatably connected.

15. The rotating shaft mechanism according to any one of claims 1 to 14, characterized in that: The swing arm assemblies (2) are respectively connected to opposite sides of the base (1), and the second swing arms (4) of the swing arm assemblies (2) are transmission-connected via an even number of gears (7), so that the swing arm assemblies (2) connected to opposite sides of the base (1) move synchronously between the folded position and the unfolded position.

16. A foldable electronic device, characterized in that: The invention comprises a display screen (200), at least two shells (300), and a hinge mechanism (100) according to any one of claims 1 to 15, wherein the shell (300) is used to support the display screen (200), the hinge mechanism (100) is located at the junction of two adjacent shells (300), and a pair of swing arm assemblies (2) of the hinge mechanism (100) are respectively connected to the corresponding shells (300).

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