Foldable electronic device

Abstract

The invention provides foldable electronic equipment, and relates to the technical field of electronic products. The foldable electronic equipment comprises a first shell and a rotating shaft mechanism, the rotating shaft mechanism comprises a base, a first door plate and a first hinge piece. The first door plate is provided with a first matching part and a first connecting part; the first hinge piece is fixedly connected with the first shell, and the first hinge piece is hinged to one end of the base; the first hinge piece is provided with a first connecting structure, and the first connecting structure is provided with a first arc surface and a first arc sliding surface; circle center lines of the first arc surface and the first arc sliding surface are first circle center lines, and the first arc surface and the first arc sliding surface are located on the same side of the first circle center lines and face opposite directions; the first arc surface and the first arc sliding surface are distributed in the extension direction of the first circle center line; when the foldable electronic equipment is switched between the unfolded state and the folded state, the first matching part slides along the first arc surface, and the first connecting part slides along the first arc sliding surface, so that the thinning of the rotating shaft mechanism is facilitated.

Description

Foldable electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 22, 2024, with application number 202410092918.7 and invention name “Foldable Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to a foldable electronic device. Background Art

[0003] With the development of foldable electronic devices, they are becoming increasingly popular among consumers. A foldable electronic device may include a foldable screen and a support device. The support device may include a first housing, a second housing, and a hinge mechanism connecting the first and second housings. The support device is used to support the foldable screen. The first and second housings are configured to rotate relative to each other via the hinge mechanism, thereby enabling the folding and unfolding of the foldable electronic device.

[0004] As foldable electronic devices become thinner and thinner, the hinge mechanism must also become thinner. In the related art, the hinge mechanism is relatively thick and needs to be further thinned. Summary of the Invention

[0005] The present application provides a foldable electronic device, which is conducive to reducing the thickness of the hinge mechanism and achieving thinning of the foldable electronic device.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In the first aspect, the present application provides a foldable electronic device, comprising: a first shell and a hinge mechanism; the hinge mechanism comprises a base, a first door panel and a first hinge; the first door panel is provided with a first matching portion and a first connecting portion; the first hinge is fixedly connected to the first shell, and the first hinge is hinged to one side of the base; the first hinge is provided with a first connecting structure corresponding to the first matching portion and the first connecting portion on the first door panel, and the first connecting structure is provided with a first arc surface and a first arc sliding surface; the center lines of the first arc surface and the first arc sliding surface are both the first center line, and the first arc surface and the first arc sliding surface are on the same side of the first center line and face opposite directions; the first arc surface and the first arc sliding surface are distributed in the extension direction of the first center line; when the foldable electronic device switches between the unfolded state and the folded state, the first matching portion slides along the first arc surface, and the first connecting portion slides along the first arc sliding surface.

[0008] According to the foldable electronic device of the present application, since the first connecting structure is provided with a first arc surface and a first arc sliding surface, the center lines of the first arc surface and the first arc sliding surface are both the first center line, and the first arc surface and the first arc sliding surface are on the same side of the first center line, so that when the foldable electronic device switches between the unfolded state and the folded state, the first matching portion slides along the first arc surface, and the first connecting portion slides along the first arc sliding surface, which can achieve relative rotation between the first door panel and the first hinge member with the first center line as the rotation center line. Moreover, since the first arc surface and the first arc sliding surface are oriented in opposite directions, in the radial direction of the first arc surface, the first matching portion and the first connecting portion can be limited between the first arc surface and the first arc sliding surface, or the first arc surface and the first arc sliding surface can be limited between the first matching portion and the first connecting portion, thereby achieving high reliability of the matching. Furthermore, since the first arc surface and the first arc sliding surface are distributed in the extension direction of the first center line. In this way, the first arc surface and the first arc sliding surface are offset in the radial direction of the first arc surface. Therefore, the matching reliability between the first matching portion and the first arc surface, and the matching reliability between the first connecting portion and the first arc sliding surface are not limited by the radial distance between the first arc surface and the first arc sliding surface. This is beneficial for reducing the overall thickness of the first hinge and the first connecting structure by reducing the radial distance between the first arc surface and the first arc sliding surface in the first arc surface, while ensuring that the first arc surface and the first arc sliding surface have a relatively large arc length to ensure reliable matching between the first hinge and the first door panel, thereby facilitating the thinning of the rotating shaft mechanism.

[0009] In one possible implementation of the first aspect of the present application, the first connecting structure is an opening formed in the first hinge member, the first arc surface and the first arc sliding surface are both disposed within the opening, and the first mating portion and the first connecting portion are located in the opening. This results in a compact structure and a small volume of the rotating shaft mechanism, which facilitates further reducing the thickness of the rotating shaft mechanism and further achieving a thinner design of the rotating shaft mechanism.

[0010] In one possible implementation of the first aspect of the present application, the opening has a first side wall surface, a second side wall surface, and a third side wall surface, the first side wall surface and the second side wall surface facing each other in the direction of extension of the first center line; the third side wall surface is connected between an end of the first side wall surface adjacent to the base and an end of the second side wall surface adjacent to the base; a boss extending toward the second side wall surface is provided on the first side wall surface, the first mating portion is located between the boss and the third side wall surface, and the first arc surface is formed on the surface of the boss facing the first mating portion. Thus, the structure is simple.

[0011] In one possible implementation of the first aspect of the present application, the first mating portion includes a first arcuate mating surface. The first mating portion forms a limited space between the first door panel and the side toward which the first arcuate mating surface faces. The boss is located within the limited space, and the first mating portion slidably engages with the first arcuate surface via the first arcuate mating surface. This results in a compact structure and a small size of the hinge mechanism, further reducing the thickness of the hinge mechanism and achieving a thinner design for the hinge mechanism.

[0012] In one possible implementation of the first aspect of the present application, the second sidewall surface includes a first region and a second region, the second region being recessed relative to the first region in a direction away from the first sidewall surface to define a recessed groove, the first arcuate sliding surface being formed on a sidewall of the recessed groove, and the first connecting portion being located within the recessed groove. This results in a compact structure and a small volume of the rotating shaft mechanism, further reducing the thickness of the rotating shaft mechanism and achieving a thinner design of the rotating shaft mechanism.

[0013] In a possible implementation of the first aspect of the present application, the first matching portion has a limiting portion, and in the extension direction of the first center line, the limiting portion is limited between the first side wall surface and the first area. In this way, on the one hand, it is beneficial to limit the first matching portion and the first connecting portion as a whole at the opening, and on the other hand, it is also beneficial to limit the first door panel and the first hinge in the extension direction of the first center line, preventing the two from moving relative to each other in the extension direction of the first center line, thereby improving the reliability of the matching between the two. In a possible implementation of the first aspect of the present application, a connecting rib is provided at one end of the first arc matching surface adjacent to the first connecting portion. The connecting rib is respectively connected to the first door panel and the first connecting portion. In this way, it is beneficial to improve the overall structural strength of the first matching portion, the first connecting portion and the first door panel.

[0014] In one possible implementation of the first aspect of the present application, the connecting rib and the first connecting portion are integrally constrained between the bottom wall of the recessed groove and the boss. This, on the one hand, facilitates integrally constraining the first mating portion and the first connecting portion at the opening, and on the other hand, facilitates constraining the first door panel and the first hinge member in the direction extending from the first centerline, preventing relative movement between the two in the direction extending from the first centerline, thereby improving the reliability of their engagement.

[0015] In a possible implementation of the first aspect of the present application, the opening extends to an end of the first hinge member away from the base, thereby preventing the connecting rib, the first matching portion, and the first connecting portion from interfering with the first hinge member during switching between the unfolded state and the folded state.

[0016] In one possible implementation of the first aspect of the present application, the surface of the first mating portion facing away from the first arcuate surface is a curved structural surface, and the centerline of the curved structural surface is the first centerline. This not only simplifies the structure and facilitates manufacturing, but also, because the curved structural surface is centered around the first centerline, the distance between the curved structural surface and the third sidewall remains unchanged during the transition of the foldable electronic device between the unfolded and folded states, thereby preventing interference between the curved structural surface and the third sidewall.

[0017] In a possible implementation of the first aspect of the present application, an avoidance surface is formed at one end of the arcuate structural surface away from the first door panel; in a plane perpendicular to the first center line of a circle, the tangent of one end of the arcuate structural surface adjacent to the avoidance surface is the first tangent, and the avoidance surface is located on the side of the first tangent close to the first door panel. In this way, when the opening is a through hole, the avoidance surface can prevent interference with the first shell during the relative rotation between the first door panel and the first hinge; when the opening is a blind hole, the avoidance surface can prevent interference with the bottom wall of the blind hole during the relative rotation between the first door panel and the first hinge. At the same time, the provision of the avoidance surface can also reduce the overall thickness of the first door panel and the first matching portion, thereby facilitating further reduction in the thickness of the pivot mechanism.

[0018] In one possible implementation of the first aspect of the present application, the absolute value of the difference between the diameters of the first arc surface and the first arc sliding surface is greater than or equal to 0 and less than or equal to 2 mm. This facilitates further reducing the overall thickness of the first hinge and the first connecting structure, further achieving a thinner design for the hinge mechanism.

[0019] Specifically, the absolute value of the difference between the diameters of the first arc surface and the first arc sliding surface is greater than or equal to 0 and less than or equal to 1 mm.

[0020] In one possible implementation of the first aspect of the present application, the first mating portion includes a first arc mating surface, the centerline of the first arc mating surface being the first centerline, the first arc mating surface and the first arc surface having equal diameters, and the first mating portion slidingly engages with the first arc surface via the first arc mating surface. Because the first arc mating surface and the first arc surface share a common centerline and have equal diameters, the contact area between the first arc mating surface and the first arc surface is large, and the sliding engagement between the two is highly reliable.

[0021] In one possible implementation of the first aspect of the present application, the first connecting portion includes a first arcuate fitting surface, the centerline of the first arcuate fitting surface being the first centerline, the first arcuate fitting surface and the first arcuate sliding surface having equal diameters, and the first connecting portion slidingly engages with the first arcuate sliding surface via the first arcuate fitting surface. Because the first arcuate fitting surface and the first arcuate sliding surface share a common centerline and have equal diameters, the contact area between the first arcuate fitting surface and the first arcuate sliding surface is large, and the sliding engagement between the two is highly reliable.

[0022] Specifically, the limiting portion protrudes from the first arc matching surface.

[0023] In a possible implementation of the first aspect of the present application, the orthographic projection of the entire first connecting portion on the first door panel is located on the first door panel, and the structure is compact.

[0024] Specifically, the surface of the first connecting portion further includes a first plane and a second plane, circumferentially along the cylindrical surface where the first arcuate matching surface resides. The first connecting portion is secured to the first door panel via the first plane. One end of the first plane is connected to one end of the second plane. The other end of the first plane and the other end of the second plane extend away from each other, with the angle between them being less than or equal to 90°. The first arcuate matching surface is connected between the other end of the first plane and the other end of the second plane. This results in a compact structure.

[0025] In a possible implementation of the first aspect of the present application, the foldable electronic device includes a second shell; the hinge mechanism also includes a second door panel and a second hinge; the second door panel is provided with a second matching portion and a second connecting portion; the second hinge is fixedly connected to the second shell, and the second hinge is hinged to the other side of the base; the second hinge is provided with a second connection structure corresponding to the second matching portion and the second connecting portion on the second door panel, and the second connection structure is provided with a second arc surface and a second arc sliding surface; the center lines of the second arc surface and the second arc sliding surface are both the second center line, and the second arc surface and the second arc sliding surface are on the same side of the second center line and in opposite directions; the second arc surface and the second arc sliding surface are distributed in the extension direction of the second center line, and the second center line is parallel to the first center line; when the foldable electronic device switches between the unfolded state and the folded state, the second matching portion slides along the second arc surface, and the second connecting portion slides along the second arc sliding surface.

[0026] According to the foldable electronic device of the present application, since the second connecting structure is provided with a second arc surface and a second arc sliding surface, the center lines of the second arc surface and the second arc sliding surface are both the second center line, and the second arc surface and the second arc sliding surface are on the same side of the second center line. Thus, when the foldable electronic device switches between the unfolded state and the folded state, the second mating portion slides along the second arc surface, and the second connecting portion slides along the second arc sliding surface, enabling relative rotation between the second door panel and the second hinge member about the second center line. Furthermore, since the second arc surface and the second arc sliding surface are oriented in opposite directions, the second mating portion and the second connecting portion can be constrained in the radial direction of the second arc surface, or the second arc surface and the second arc sliding surface can be constrained in the radial direction of the second arc surface, thereby enhancing the reliability of the mating. Furthermore, since the second arc surface and the second arc sliding surface are distributed in the direction extending from the second center line, the second arc surface and the second arc sliding surface are offset in the radial direction of the second arc surface. Therefore, the matching reliability between the second matching portion and the second arc surface, and the matching reliability between the second connecting portion and the second arc sliding surface will not be limited by the radial distance between the second arc surface and the second arc sliding surface. This is beneficial for reducing the overall thickness of the second hinge and the second connecting member by reducing the radial distance between the second arc surface and the second arc sliding surface in the second arc surface, while ensuring that the second arc surface and the second arc sliding surface have a relatively large arc length to ensure that the second hinge and the second door panel can match reliably, thereby facilitating the thinning of the rotating shaft mechanism.

[0027] In a possible implementation of the first aspect of the present application, a foldable electronic device includes a foldable screen. The foldable screen includes a first display portion, a second display portion, and a third display portion. The third display portion is connected between the first display portion and the second display portion. The first housing has a first support surface, and the second housing has a second support surface. The hinge mechanism has a third support surface. The first display portion is stacked and fixed to the first support surface. The second display portion is stacked and fixed to the second support surface, and the third display portion is supported on the third support surface. In the unfolded state, the first display portion, the third display portion, and the second display portion are arranged in sequence, and the display surfaces of the first display portion, the third display portion, and the second display portion are coplanar.

[0028] Furthermore, the foldable electronic device is an inward-folding electronic device.

[0029] In the second aspect, the present application provides a foldable electronic device, comprising: a hinge mechanism and a first shell; the hinge mechanism comprises a base, a first door panel and a first hinge; the first door panel is provided with a first matching portion and a first connecting portion; the first hinge is fixedly connected to the first shell, and the first hinge is hinged to one side of the base; the first hinge is provided with a first connecting structure corresponding to the first matching portion and the first connecting portion on the first door panel, and the first connecting structure is provided with a first arc surface; a first fixing structure is provided on the first shell, and the first fixing structure is provided with a first arc surface; the center lines of the first arc surface and the first arc surface are both the first center line, and the first arc surface and the first arc surface are both on the same side of the first center line and in opposite directions; on at least a section of the switching path in which the foldable electronic device switches between the unfolded state and the folded state, the first matching portion slides along the first arc surface, and the first connecting portion slides along the first arc surface.

[0030] According to the foldable electronic device of the present application, since the first housing and the first hinge are fixedly connected, the first engaging portion slides along the first arcuate surface and the first connecting portion slides along the first curved surface. This not only enables relative rotation between the first door panel and the first hinge about the first centerline of the circle, but also, because the first arcuate surface and the first curved surface are oriented in opposite directions, the first engaging portion and the first connecting portion can be constrained between the first arcuate surface and the first curved surface, or the first arcuate surface and the first curved surface can be constrained between the first engaging portion and the first connecting portion in the radial direction of the first arcuate surface, thereby enhancing the reliability of the engagement. Furthermore, providing the first curved surface on the first housing avoids the need for a curved surface on the first hinge for sliding engagement with the first connecting portion, or reduces the length of the curved surface on the first hinge for sliding engagement with the first connecting portion, thereby reducing the thickness of the first hinge and the hinge mechanism, further achieving a thinner design for the hinge mechanism.

[0031] In a possible implementation of the second aspect of the present application, the first curved surface is located on the side of the first curved surface away from the first center line of the circle, and faces the first curved surface. Therefore, a first curved slot can be defined between the two, and when the foldable electronic device switches between the unfolded state and the folded state, the first connecting portion and the first matching portion are both located in the first curved slot. In this way, the structure is simple and the reliability of the matching is higher. In addition, since the first curved surface is located on the side of the first curved surface away from the first center line of the circle, the diameter of the first curved surface is larger than the diameter of the first curved surface. When the first door panel rotates the same angle, the movement path of the first connecting portion must be larger than the movement path of the first matching portion. At this time, for the solution of setting the first curved surface on the first shell, it is more conducive to optimizing the arc length of the first curved surface, improving the reliability of the matching between the first connecting portion and the first curved surface, and improving the reliability of the matching between the first hinge and the first door panel.

[0032] In a possible implementation of the second aspect of the present application, an arc-shaped slider is provided on the first door panel, and the arc-shaped surfaces on both radial sides of the arc-shaped slider are respectively a first arc mating surface and a first arc adapting surface, the first mating portion is the first arc mating surface, and the first connecting portion is the first arc adapting surface; the center lines of the first arc mating surface and the first arc adapting surface are both the first center lines; wherein the diameter of the first arc mating surface is equal to the diameter of the first arc surface, and the diameter of the first arc adapting surface is equal to the diameter of the first arc surface. As a result, the contact area between the first arc mating surface and the first arc surface is large, and the reliability of the sliding fit between the two is high, and the contact area between the first arc adapting surface and the first arc surface is large, and the reliability of the sliding fit between the two is high.

[0033] In one possible implementation of the second aspect of the present application, in the expanded state, the overlap width between the first arcuate matching surface and the first curved surface is greater than or equal to 0.3 mm and less than or equal to 2 mm. This facilitates further balancing the reliability of the fit between the first door panel and the first hinge member and the thin design of the hinge mechanism.

[0034] In one possible implementation of the second aspect of the present application, the first connecting structure is a through hole formed in the first hinge member, the first arc surface is formed on the wall of the through hole, and the first fixing structure is located within the through hole. This provides a compact structure, which helps reduce the overall thickness of the hinge mechanism and achieve a thin design for the hinge mechanism.

[0035] In one possible implementation of the second aspect of the present application, a connecting rib is provided at one end of the curved slider in the direction extending along the first centerline. The connecting rib is connected to the first door panel, thereby improving the connection strength between the curved slider and the first door panel.

[0036] To prevent the connecting rib from interfering with the relative movement between the first door panel and the first hinge, a relief hole is provided on the first hinge. The relief hole is located at one end of the through hole in the direction of extension of the first centerline and communicates with the through hole. The connecting rib is passed through the relief hole.

[0037] On this basis, in order to prevent interference between the connecting rib and the first hinge, the avoidance hole extends to the end of the first hinge away from the base.

[0038] In one possible implementation of the second aspect of the present application, the first arcuate surface and the first circular arc surface are distributed in the extension direction of the first circle centerline. This facilitates further reducing the overall thickness of the first hinge member and the first connecting structure by reducing the distance between the first circular arc surface and the first circular arc surface in the radial direction of the first circular arc surface, thereby further achieving a thinner shaft mechanism.

[0039] In one possible implementation of the second aspect of the present application, the first connecting portion slides only along the first curved surface throughout the entire transition path of the foldable electronic device between the unfolded and folded states. In this case, no additional curved surface is required on the first hinge for slidingly engaging with the first connecting portion, thereby further reducing the thickness of the first hinge and the hinge mechanism.

[0040] In one possible implementation of the second aspect of the present application, the first connecting structure is provided with a first arcuate sliding surface, the first arcuate sliding surface and the first curved surface being co-cylindrical; the first arcuate sliding surface is located on a side of the first curved surface extending along its own arcuate trajectory, closer to the base; and the first connecting portion slidably engages with the first arcuate sliding surface. This facilitates improving the reliability of the engagement between the first hinge and the first door panel.

[0041] In a possible implementation of the second aspect of the present application, the first arcuate sliding surface is formed on a hole wall of the through hole that faces the first arcuate surface, and the first arcuate sliding surface faces the first arcuate surface. This helps to improve the reliability of the fit between the first hinge and the first door panel. In a possible implementation of the second aspect of the present application, when the first arcuate surface and the first arcuate surface are distributed in the extension direction of the first center line, the first arcuate sliding surface and the first arcuate surface are also distributed in the extension direction of the first center line.

[0042] On this basis, the specific distribution method of the first arc sliding surface and the first arc surface in the extension direction of the first center line can refer to any one of the technical solutions in the above-mentioned first aspect, and will not be repeated here.

[0043] In a possible implementation of the second aspect of the present application, the first shell includes a first middle frame and a first connecting plate; the first middle frame has a first supporting surface, and the first middle frame also has a first side surface facing the hinge mechanism; the first connecting plate is located on a side of the first middle frame close to the hinge mechanism; the first connecting plate and the first supporting surface are located at opposite ends of the first side surface; and the first fixing structure is fixed to a surface of the first connecting plate that is aligned with the first supporting surface and is located at an end of the first connecting plate close to the first side surface. In this way, the first door panel and the first hinge can be shielded by the first connecting plate, thereby allowing the first connecting plate to protect this portion of the structure, while also improving the appearance and making the structure more compact.

[0044] In a possible implementation of the second aspect of the present application, the foldable electronic device includes a second shell; a second fixing structure is provided on the second shell, and the second fixing structure is provided with a second arc surface; the hinge mechanism also includes a second door panel and a second hinge; the second door panel is provided with a second matching portion and a second connecting portion; the second hinge is fixedly connected to the second shell, and the second hinge is hinged to the other side of the base; the second hinge is provided with a second connecting structure corresponding to the second matching portion and the second connecting portion on the second door panel, and the second connecting structure is provided with a second arc surface; the center lines of the second arc surface and the second arc surface are both the second center line, the second arc surface and the second arc surface are both on the same side of the second center line and in opposite directions, and the second center line is parallel to the first center line; on at least one section of the switching path in which the foldable electronic device switches between the unfolded state and the folded state, the second matching portion slides along the second arc surface, and the second connecting portion slides along the second arc surface.

[0045] According to the foldable electronic device of the present application, since the second housing and the second hinge are fixedly connected, the second engaging portion slides along the second arc surface and the second connecting portion slides along the second curved surface. This not only enables relative rotation between the second door panel and the second hinge with the second centerline as the rotation centerline, but also, because the second arc surface and the second curved surface are oriented in opposite directions, the second engaging portion and the second connecting portion can be constrained between the second arc surface and the second curved surface, or between the second engaging portion and the second connecting portion, in the radial direction of the second arc surface, thereby enhancing the reliability of the engagement. Furthermore, providing the second curved surface on the second housing avoids providing a curved surface on the second hinge for sliding engagement with the second connecting portion, or reduces the arc length of the curved surface provided on the second hinge for sliding engagement with the second connecting portion, thereby facilitating a reduction in the thickness of the second hinge and the hinge mechanism, further achieving a thinner design of the hinge mechanism.

[0046] In a possible implementation of the second aspect of the present application, a foldable electronic device includes a foldable screen. The foldable screen includes a first display portion, a second display portion, and a third display portion. The third display portion is connected between the first display portion and the second display portion. The first housing has a first support surface, and the second housing has a second support surface. The hinge mechanism has a third support surface. The first display portion is stacked and fixed to the first support surface. The second display portion is stacked and fixed to the second support surface, and the third display portion is supported on the third support surface. In the unfolded state, the first display portion, the third display portion, and the second display portion are arranged in sequence, and the display surfaces of the first display portion, the third display portion, and the second display portion are coplanar.

[0047] Furthermore, the foldable electronic device is an inward-folding electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a perspective view of a foldable electronic device in an unfolded state provided by an embodiment of the present application;

[0049] FIG2 is an exploded schematic diagram of a folding screen and a supporting device in the foldable electronic device shown in FIG1 ;

[0050] FIG3 is a perspective view of the foldable electronic device shown in FIG1 in a folded state;

[0051] FIG4 is a cross-sectional view of the foldable electronic device shown in FIG1 taken along line AA;

[0052] FIG5 is a schematic diagram of the first housing shown in FIG4 ;

[0053] FIG6 a is a schematic diagram of the rotating shaft mechanism shown in FIG4 ;

[0054] FIG6 b is an exploded view of the rotating shaft mechanism shown in FIG6 a ;

[0055] FIG7 is a schematic cross-sectional view of the rotating shaft mechanism shown in FIG6a and FIG6b at line BB;

[0056] FIG8 is a schematic diagram of a rotating shaft mechanism in an expanded state according to some other embodiments of the present application;

[0057] FIG9 is a schematic diagram of the rotating shaft mechanism in a folded state according to FIG8 ;

[0058] FIG10 is a partial structural diagram of a rotating shaft mechanism provided in some other embodiments of the present application;

[0059] FIG11 is an exploded schematic diagram of the rotating shaft mechanism shown in FIG10 ;

[0060] FIG12 is an enlarged view of the circled portion at C of the structure shown in FIG11 ;

[0061] FIG13 is an enlarged view of the circled portion at D of the structure shown in FIG10 ;

[0062] FIG14 is a partial schematic diagram of the first door panel, the first matching portion, and the first connecting portion shown in FIG12 and FIG13 ;

[0063] FIG15 is a side view of the structure shown in FIG14;

[0064] FIG16 is a schematic diagram of a support device in a folded state according to some further embodiments of the present application;

[0065] FIG17 is a schematic diagram of the coordination of the first door panel, the first middle frame, and the first hinge member in the cross-sectional structure of the support device at line EE shown in FIG16 ;

[0066] FIG18 is an enlarged view of the portion circled at F according to the structure shown in FIG17 ;

[0067] FIG19 is a partial schematic diagram of the rotating shaft mechanism shown in FIG18 during switching between the unfolded state and the folded state;

[0068] FIG20 is an exploded schematic diagram of the partial structure of the first door panel and the first hinge member shown in FIG17 ;

[0069] FIG21 is an assembly diagram of the partial structure of the first door panel and the first hinge member shown in FIG20 ;

[0070] FIG22 is an assembled cross-sectional view of the first middle frame, the first hinge, and the first door panel of some other embodiments provided by the present application;

[0071] FIG23 is an enlarged view of the circled portion at H of the structure shown in FIG22 ;

[0072] FIG24 is a partial schematic diagram of the foldable electronic device according to the structure shown in FIG22 during the process of switching between the unfolded state and the folded state;

[0073] FIG25 is a partial schematic diagram of the process of switching between the unfolded state and the folded state of the foldable electronic device in some other embodiments of the present application. DETAILED DESCRIPTION

[0074] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being more preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0075] In the description of the embodiments of this application, the term "and / or" refers to and encompasses any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects are in an "or" relationship.

[0076] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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.

[0077] In the description of the embodiments of the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In the absence of further restrictions, an element limited by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0078] In the description of the embodiments of the present application, the terms "coplanar", "collinear", "perpendicular", "parallel", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a specific amount (i.e., the limitations of the measurement system). For example, "collinear" means approximately collinearity within a certain error range is allowed, and the error range can be an angular deviation within 5°, 10°, or 15° relative to absolute collinearity, or a spacing deviation of no more than 0.05mm, 0.1mm, 0.2mm, 0.5mm, or 1mm relative to absolute collinearity. "Coplanar" means approximately coplanarity within a certain error range is allowed, and the error range can be an angular deviation within 5°, 10°, or 15° relative to absolute coplanarity, or a step difference of no more than 0.05mm, 0.1mm, 0.2mm, 0.5mm, or 1mm relative to absolute coplanarity. "Parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, an angular deviation within 5°, 8°, or 10°. "Perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°, 8°, or 10°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, that the difference between the two is less than or equal to 5% of either.

[0079] The specific structure of the foldable electronic device of the present application is described in detail below.

[0080] Embodiments of the present application provide a foldable electronic device. The foldable electronic device may be any electronic device capable of changing the foldable screen and the unfolded or folded form of the device itself. Specifically, the foldable electronic device may be a user equipment (UE) or a terminal device, for example, a mobile phone, a portable Android device (PAD), or a laptop computer. The foldable electronic device may also be a foldable stand.

[0081] Please refer to Figures 1 and 2. Figure 1 is a perspective view of a foldable electronic device 100 in an unfolded state provided in an embodiment of the present application, and Figure 2 is an exploded schematic view of the foldable screen 20 and the support device 10 in the foldable electronic device 100 shown in Figure 1. In this embodiment, the foldable electronic device 100 is a mobile phone.

[0082] The foldable electronic device 100 is approximately in the shape of a rectangular flat plate in the unfolded state. To facilitate the description of the various embodiments below, an XYZ coordinate system is established for the foldable electronic device 100 in the unfolded state, defining the width direction of the foldable electronic device 100 as the X-axis direction, the length direction of the foldable electronic device 100 as the Y-axis direction, and the thickness direction of the foldable electronic device 100 as the Z-axis direction. It is understandable that the coordinate system setting of the foldable electronic device 100 can be flexibly set according to actual needs and is not specifically limited here. In some other embodiments, the shape of the foldable electronic device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0083] The foldable electronic device 100 includes a foldable screen 20 and a supporting device 10 .

[0084] It is understandable that FIG1 and FIG2 only schematically illustrate some components included in the foldable electronic device 100, and the actual shape, actual size, actual position and actual structure of these components are not limited by FIG1 and FIG2.

[0085] The foldable screen 20 is used to display images, videos, and other information. The foldable screen 20 can switch between an unfolded state and a folded state. Specifically, referring to Figures 1 and 2 , the foldable screen 20 may include a first display portion 201 , a second display portion 202 , and a third display portion 203 .

[0086] The third display portion 203 is connected between the first display portion 201 and the second display portion 202 .

[0087] Continuing with Figures 1 and 2, when the foldable screen 20 is in the unfolded state, the first display portion 201, the third display portion 203, and the second display portion 202 are arranged sequentially along the X-axis, with their display surfaces coplanar. In other embodiments, when the foldable screen 20 is in the unfolded state, the first display portion 201, the third display portion 203, and the second display portion 202 can also be arranged sequentially along the Y-axis. When the foldable screen 20 is in the unfolded state, a large-screen display can be achieved, providing users with richer information and a better user experience.

[0088] At least the third display portion 203 of the foldable screen 20 is a flexible screen structure. This allows the third display portion 203 to bend and deform under external force, allowing the foldable screen 20 to fold from the unfolded state shown in Figure 1 to the folded state. The first display portion 201 and second display portion 202 of the foldable screen 20 can be flexible screen structures, rigid screen structures, or partially flexible and partially rigid screen structures, without specific limitation.

[0089] Please refer to Figure 3, which is a perspective view of the foldable electronic device 100 shown in Figure 1 in a folded state. The foldable screen 20 of the foldable electronic device 100 is also in a folded state. When the foldable screen 20 is in the folded state, the third display portion 203 is bent, and the first display portion 201 and the second display portion 202 of the foldable screen 20 are parallel and opposite to each other.

[0090] When the foldable screen 20 is folded, as shown in Figure 3, the third display portion 203 is folded into a teardrop shape. Specifically, the third display portion 203 includes a first transition section 2032, a second transition section 2033, and an arcuate section 2031. The first transition section 2032 connects between the arcuate section 2031 and the first display portion 201. The second transition section 2033 connects between the arcuate section 2031 and the second display portion 202.

[0091] The distance between the end of the first transition section 2032 connecting to the first display portion 201 and the end of the second transition section 2033 connecting to the second display portion 202 is a first distance d1, and the distance between the end of the first transition section 2032 connecting to the curved section 2031 and the end of the second transition section 2033 connecting to the curved section 2031 is a second distance d2. The second distance d2 is greater than the first distance d1. This allows the third display portion 203 to have a larger bending radius, allowing the third display portion 203 to bend more naturally when the foldable screen 20 is folded, thereby reducing creases on the foldable screen 20 and reducing wear and tear on the foldable screen 20, making it more durable. It is understood that when the foldable electronic device 100 is in the folded state, the third display portion 203 can also be folded into other shapes as needed, and this application does not limit this.

[0092] Please continue to refer to Figure 3. When the folding screen 20 is in the folded state, the first display part 201 of the folding screen 20 faces the display surface of the second display part 202. The folding screen 20 is not visible to the user, and the supporting device 10 is protected outside the folding screen 20 to prevent the folding screen 20 from being scratched by hard objects. This foldable electronic device 100 is an inward-folding electronic device, and the size of the foldable electronic device 100 is reduced, which is convenient to carry. In other examples, the foldable electronic device 100 can also be an outward-folding electronic device. For outward-folding electronic devices. In the folded state, the supporting device 10 is between the first display part 201 and the second display part 202, and the display surface of the first display part 201 is opposite to the display surface of the second display part 202.

[0093] The support device 10 is used to support the folding screen 20. Please continue to refer to Figures 2 and 3. The support device 10 includes a first shell 1, a second shell 2 and a rotating shaft mechanism 3.

[0094] It is understandable that FIG. 2 and FIG. 3 only schematically illustrate some components of the supporting device 10 , and the actual shape, actual size, actual position and actual structure of these components are not limited by FIG. 3 .

[0095] The first housing 1 has a first supporting surface M1. The first display portion 201 is stacked and fixed on the first supporting surface M1. Exemplarily, the connection between the first supporting surface M1 and the first display portion 201 includes, but is not limited to, gluing.

[0096] The second housing 2 has a second supporting surface M2. The second display portion 202 is stacked and fixed on the second supporting surface M2. For example, the connection between the second supporting surface M2 and the second display portion 202 includes, but is not limited to, gluing.

[0097] The hinge mechanism 3 is connected between the first shell 1 and the second shell 2. The first shell 1 and the second shell 2 are configured to be rotatably connected through the hinge mechanism 3, thereby realizing the relative folding or relative unfolding of the first shell 1 and the second shell 2, and further realizing the folding or unfolding of the folding screen 20.

[0098] The hinge mechanism 3 has a third support surface M3 , which can support the third display portion 203 of the folding screen 20 .

[0099] Specifically, referring to Figure 2 , in the unfolded state, the first support surface M1 of the first housing 1, the second support surface M2 of the second housing 2, and the third support surface M3 of the hinge mechanism 3 are coplanar and oriented in the same direction. This ensures reliable support for the foldable screen 20 and ensures its flatness.

[0100] In the folded state, please continue to refer to Figure 3. The first shell 1 and the second shell 2 are stacked and spaced apart, and the first support surface M1 of the first shell 1 and the second support surface M2 of the second shell 2 face each other, so as to hide the folding screen 20 between the first shell 1 and the second shell 2, thereby achieving protection for the folding screen 20.

[0101] Please refer to Figure 4, which is a cross-sectional view of the foldable electronic device 100 shown in Figure 1 at line AA. The first housing 1 may include a first middle frame 11 and a first back cover 12. The first middle frame 11 has a first support surface M1. The first back cover 12 is fixedly connected to a side of the first middle frame 11 away from the first display portion 201. A first accommodating cavity C1 is formed between the first middle frame 11 and the first back cover 12. The first accommodating cavity C1 can be used to accommodate electronic components such as a motherboard, a camera module, and a battery.

[0102] Similarly, the second housing 2 can include a second middle frame 21 and a second back cover 22. The second middle frame 21 has a second support surface M2. The second back cover 22 is fixedly connected to the side of the second middle frame 21 away from the second display portion 202. A second accommodating cavity C2 is formed between the second middle frame 21 and the second back cover 22. The second accommodating cavity C2 can be used to accommodate electronic components such as the sub-board, speaker module, array, and battery.

[0103] In other examples, the second housing 2 may not include the second back cover 22. In this case, the foldable electronic device 100 may include a secondary display screen (not shown). The secondary display screen may be fixedly connected to a side of the second middle frame 21 away from the second display portion 202. A second receiving cavity C2 is formed between the second middle frame 21 and the secondary display screen.

[0104] Please continue to refer to FIG4 and FIG5 together, which is a schematic diagram of the first housing 1 shown in FIG4 . The first middle frame 11 includes a first middle plate 111 and a first side frame 112 .

[0105] The first middle plate 111 is stacked and spaced apart from the first back cover 12. The first middle plate 111 has a first support surface M1. The first frame 112 surrounds the edge of the first middle plate 111 and is fixedly connected to the first middle plate 111 and the first back cover 12 to define a first receiving cavity C1.

[0106] The first housing 1 further includes two first extending plates 14 and a first connecting plate 13 .

[0107] The two first extension plates 14 are located on one side of the first middle frame 11 close to the hinge mechanism 3. The two first extension plates 14 are connected to the two ends of the first middle frame 11 in the Y-axis direction in a one-to-one correspondence, and the two first extension plates 14 are arranged opposite to each other in the Y-axis direction.

[0108] Continuing to refer to FIG. 4 and FIG. 5 , the first frame 112 has a first side surface 1121 facing the hinge mechanism 3 .

[0109] The first connecting plate 13 is located on the side of the first middle frame 11 near the hinge mechanism 3. The first connecting plate 13 is connected to the end of the first side surface 1121 that is away from the first support surface M1. The first connecting plate 13 is connected between the two first extension plates 14. The first connecting plate 13, the two first extension plates 14, and the first side surface 1121 define a fixed space C3, within which a portion of the hinge mechanism 3 is located. This not only facilitates the fixing of the hinge mechanism 3 but also improves its concealment.

[0110] Specifically, to simplify the processing of the first housing 1, reduce manufacturing costs, and improve the structural strength of the first housing 1, the first middle frame 11, the first extension plate 14, and the first connecting plate 13 are integrally formed. In other examples, the first middle frame 11 and the first extension plate 14, the first middle frame 11 and the first connecting plate 13, and the first connecting plate 13 and the first extension plate 14 can also be connected by gluing, welding, clamping, or screwing.

[0111] Similarly, a fixed space may also be formed on the second housing 2 to accommodate another portion of the rotating shaft mechanism 3. The structure of the second housing 2 may refer to that of the first housing 1 and will not be described in detail here.

[0112] 6a and 6b, FIG6a is a schematic diagram of the rotating shaft mechanism 3 shown in FIG4. The third supporting surface M3 on the rotating shaft mechanism 3 includes a first sub-supporting surface M31, a second sub-supporting surface M32 and a third sub-supporting surface M33.

[0113] Continuing to refer to Figures 6a and 6b, Figure 6b is an exploded view of the hinge mechanism 3 shown in Figure 6a. The hinge mechanism 3 includes a base 31, a first door panel 32, a first hinge 34, a first main swing arm 3a, a first auxiliary swing arm 3c, a first door panel swing arm 38, a second door panel 33, a second hinge 35, a second main swing arm 3b, a second auxiliary swing arm 3d, and a second door panel swing arm 39.

[0114] FIG. 6 a and FIG. 6 b only schematically illustrate some components of the rotating shaft mechanism 3 , and the actual shapes, actual sizes, actual positions and actual structures of these components are not limited by FIG. 6 a and FIG. 6 b .

[0115] The base 31 can provide a mounting base for other components of the rotating shaft mechanism 3. The length direction of the base 31 is parallel to the Y-axis direction, the width direction is parallel to the X-axis direction, and the thickness direction is parallel to the Z-axis direction.

[0116] Please continue to refer to FIG. 6 b , the base 31 includes a support plate 311 and a shaft cover 312 .

[0117] The support plate 311 is in the shape of a flat plate and has a second sub-support surface M32 . The second sub-support surface M32 is used to support the arc segment 2031 .

[0118] The shaft cover 312 is disposed on a side of the support plate 311 away from the second sub-support surface M32 .

[0119] Referring to Figure 6b , the shaft cover 312 includes a bottom plate 3121 and side panels 3122. The side panels 3122 surround the outer edge of the bottom plate 3121, defining a storage space between the side panels 3122 and the bottom plate 3121. Several components of the hinge mechanism 3 can be accommodated within this space. This allows some components of the hinge mechanism 3 to be concealed within the shaft cover 312, enhancing the aesthetics of the foldable electronic device 100.

[0120] The first hinge 34 is fixed to the first housing 1. Specifically, the first hinge 34 is fixed to the first middle frame 11. In other examples, the first hinge 34 can also be fixed to the first back cover 12. The connection between the first hinge 34 and the first housing 1 includes, but is not limited to, gluing, welding, clamping, or screwing.

[0121] The first hinge 34 is slidably and rotatably connected to one side of the base 31. As shown in Figure 6b, the first hinge 34 is slidably and rotatably connected to one side of the base 31 via the first main swing arm 3a. Specifically, one end of the first main swing arm 3a slidably and rotatably connects to the base 31 and extends along the Y-axis relative to the rotation axis of the base 31. The first hinge 34 is hingedly connected to the other end of the first main swing arm 3a and extends along the Y-axis relative to the hinge axis of the first main swing arm 3a.

[0122] The first auxiliary swing arm 3c and the first hinge 34 are located on the same side of the base 31. The first auxiliary swing arm 3c is hinged to one side of the base 31. The hinge axis of the first auxiliary swing arm 3c relative to the base 31 extends along the Y-axis direction. The first auxiliary swing arm 3c and the first main swing arm 3a are arranged in the Y-axis direction. The hinge axis of the first main swing arm 3a relative to the base 31 and the hinge axis of the first auxiliary swing arm 3c relative to the base 31 are parallel. When the rotating shaft mechanism 3 switches between the unfolded state and the folded state, the first auxiliary swing arm 3c and the first hinge 34 can slide relative to each other in a direction perpendicular to the Y-axis.

[0123] The first door panel 32 has a first sub-support surface M31. The first door panel 32 fixes and supports the first transition section 2032 via the first sub-support surface M31. Exemplarily, the connection between the first door panel 32 and the first transition section 2032 includes, but is not limited to, gluing.

[0124] The first door panel 32 is slidably and rotatably connected to the first hinge 34. The first door panel 32 extends along the Y-axis relative to the rotation axis of the first hinge 34.

[0125] A first door panel swing arm 38 is slidably and rotatably connected to one side of the base 31. The first door panel swing arm 38 and the first hinge 34 are located on the same side of the base 31 and are spaced apart along the Y-axis. When the hinge mechanism switches between the unfolded and folded states, the first door panel 32 and the first door panel swing arm 38 can slide relative to each other in a direction perpendicular to the Y-axis.

[0126] In order to improve the reliable support of the first sub-support surface M31 to the first transition section 2032, the above-mentioned first hinge 34, first main swing arm 3a, first auxiliary swing arm 3c, and first door panel swing arm 38 are all located on the side of the first door panel 32 away from the first sub-support surface M31.

[0127] The second hinge 35 is fixed to the second housing 2. Specifically, the second hinge 35 is fixed to the second middle frame 21. In other examples, the second hinge 35 can also be fixed to the second back cover 22. The connection between the second hinge 35 and the second housing 2 includes, but is not limited to, gluing, welding, clamping, or screwing.

[0128] The second hinge 35 is slidably and rotatably connected to the other side of the base 31. The second hinge 35 is slidably and rotatably connected to the other side of the base 31 via the second main swing arm 3b. Specifically, one end of the second main swing arm 3b is slidably and rotatably connected to the base 31 and extends along the Y-axis relative to the rotation axis of the base 31. The second hinge 35 is hingedly connected to the other end of the second main swing arm 3b and extends along the Y-axis relative to the hinge axis of the second main swing arm 3b.

[0129] The second auxiliary swing arm 3d and the second hinge 35 are located on the same side of the base 31. The second auxiliary swing arm 3d is hinged to the other side of the base 31. The second auxiliary swing arm 3d extends along the Y-axis relative to the hinge axis of the base 31. The second auxiliary swing arm 3d and the second main swing arm 3b are arranged in the Y-axis direction. The hinge axis of the second main swing arm 3b relative to the base 31 and the hinge axis of the second auxiliary swing arm 3d relative to the base 31 are parallel. When the rotating shaft mechanism 3 switches between the unfolded state and the folded state, the second auxiliary swing arm 3d and the second hinge 35 can slide relative to each other in a direction perpendicular to the Y-axis.

[0130] The second door panel 33 has a third sub-support surface M33. The second door panel 33 fixes and supports the second transition section 2033 through the third sub-support surface M33. Exemplarily, the connection between the second door panel 33 and the second transition section 2033 includes, but is not limited to, gluing.

[0131] The second door panel 33 is slidably and rotatably connected to the second hinge 35. The second door panel 33 extends along the Y-axis relative to the rotation axis of the second hinge 35.

[0132] A second door panel swing arm 39 is slidably and pivotally connected to the other side of the base 31. The second door panel swing arm 39 and the second hinge 35 are located on the same side of the base 31 and are spaced apart along the Y-axis. When the hinge mechanism switches between the unfolded and folded positions, the second door panel 33 and the second door panel swing arm 39 can slide relative to each other in a direction perpendicular to the Y-axis.

[0133] In order to improve the reliable support of the third sub-support surface M33 for the second transition section 2033, the above-mentioned second hinge 35, second main swing arm 3b, second auxiliary swing arm 3d, and second door panel swing arm 39 are all located on the side of the second door panel 33 away from the third sub-support surface M33.

[0134] From the above description, it can be found that the first hinge 34, the first main swing arm 3a, the first door panel 32, the first door panel swing arm 38, the first auxiliary swing arm 3c and the base 31 can constitute a connecting rod mechanism; similarly, the second hinge 35, the second main swing arm 3b, the second door panel 33, the second door panel swing arm 39, the second auxiliary swing arm 3d and the base 31 can also constitute a connecting rod mechanism. When the first shell 1 rotates under the action of external force, since the first hinge 34 is fixedly connected to the first shell 1, the force at the first shell 1 can be transmitted to the first hinge 34. When the force acting on the first hinge 34 causes it to rotate relative to the base 31, the first auxiliary swing arm 3c, the first main swing arm 3a, the first door panel swing arm 38, the first door panel 32, etc. will produce mechanical linkage; similarly, when the second shell 2 rotates under the action of external force, since the second hinge 35 is fixedly connected to the second shell 2, the force at the second shell 2 can be transmitted to the second hinge 35. When the force acting on the second hinge 35 causes it to rotate relative to the base 31, the second auxiliary swing arm 3d, the second main swing arm 3b, the second door panel swing arm 39 and the second door panel 33 will produce mechanical linkage, thereby realizing the folding and unfolding of the hinge mechanism 3, and then realizing the folding and unfolding of the foldable electronic device 100.

[0135] In the folded state, the first support surface M1 of the first housing 1 and the second support surface M2 of the second housing 2 are both perpendicular to the second sub-support surface M32 of the base 31. The angles between the first sub-support surface M31 of the first door panel 32 and the second sub-support surface M32 of the base 31, as well as between the third sub-support surface M33 of the second door panel 33 and the second sub-support surface M32 of the base 31, are both less than 90°. This allows the folding screen 20 to be folded into a teardrop shape.

[0136] In order to realize the hinge connection between the first door panel 32 and the first hinge 34 and the hinge connection between the second door panel 33 and the second hinge 35, please refer to Figure 7, which is a cross-sectional schematic diagram of the hinge mechanism 3 at line BB according to Figures 6a and 6b. An arc-shaped slider structure D1 is provided on the surface of the first door panel 32 facing the first hinge 34 and on the surface of the second door panel 33 facing the second hinge 35. The center line of the arc-shaped slider structure D1 extends along the Y-axis direction. An arc-shaped slot structure D2 is provided on the first hinge 34 and the second hinge 35. The arc-shaped slider structure D1 on the first door panel 32 slides in the arc-shaped slot structure D2 of the first hinge 34, and the arc-shaped slider structure D1 on the second door panel 33 slides in the arc-shaped slot structure D2 of the second hinge 35.

[0137] In this example, the central angle α between the arcuate groove structure D2 and the arcuate slider structure D1 ranges from 40° to 180°. This helps ensure that the arcuate slider structure D1 and the arcuate groove structure D2 have a relatively large arc length. As the hinge mechanism 3 switches between the unfolded and folded states, the arcuate groove structure D2 can effectively guide the arcuate slider structure D1, thereby improving the reliability of the relative rotation between the door panel and the hinge.

[0138] As the demand for thinner electronic devices becomes increasingly strong, the demand for thinner hinge mechanisms 3 also follows. In order to achieve the thinning of the hinge mechanism 3, the first hinge 34 needs to be thinned, so that the hinge mechanism 3 shown in Figures 8 and 9 can be obtained. Figure 8 is a schematic diagram of the hinge mechanism 3 in the unfolded state of other embodiments of the present application, and Figure 9 is a schematic diagram of the hinge mechanism 3 in the folded state according to Figure 8. Although the thinning of the hinges (first hinge 34 and second hinge 35) in the Z direction is conducive to the thinning of the hinge mechanism 3, this will result in insufficient space on the first hinge 34 to set the arc-shaped chute structure D2 due to the small thickness dimension, resulting in a reduction in the arc length of the arc-shaped chute structure D2. For example, the central angle α corresponding to the arc-shaped chute structure D2 is less than 40° or less than 30°. The reduction in the arc length of the arc-shaped slide groove structure D2 results in insufficient limiting space for the arc-shaped slide groove structure D2 to limit the arc-shaped slider structure D1. During the switching of the rotating shaft mechanism 3 between the unfolded state and the folded state, the arc-shaped slide groove structure D2 cannot guide the arc-shaped slider structure D1 well, and the arc-shaped slider structure D1 cannot move according to the preset trajectory, thereby reducing the reliability of the sliding fit between the door panel and the hinge, and further reducing the opening and closing reliability of the rotating shaft mechanism 3.

[0139] In order to achieve a thinner shaft mechanism 3 without affecting the reliability of the fit between the door panel and the hinge, the shaft mechanism 3 of the embodiment of the present application is described below with different examples (Example 1 and Example 2).

[0140] Example 1

[0141] Please refer to Figures 10, 11, and 12. Figure 10 is a partial structural schematic diagram of the rotating shaft mechanism 3 provided in some embodiments of the present application. Figure 11 is an exploded schematic diagram of the rotating shaft mechanism 3 shown in Figure 10. Figure 12 is an enlarged view of the circled portion C of the structure shown in Figure 11. The perspectives shown in Figures 10 and 11 are from the side of the rotating shaft mechanism 3 facing away from the third display portion 203. This embodiment differs from the above embodiment in that:

[0142] The first door panel 32 is provided with a first matching portion 321 and a first connecting portion 322 . The first hinge 34 is provided with a first connecting structure 37 .

[0143] Please continue to refer to FIG12 and FIG13 together, which is an enlarged view of the circled portion at D of the structure shown in FIG10 . The first connecting structure 37 has a first arc surface 371 and a first arc sliding surface 372 .

[0144] The center lines of the first arc surface 371 and the first arc sliding surface 372 are both the first center line o1. The first center line o1 extends along the Y-axis direction. The first arc surface 371 and the first arc sliding surface 372 are located on the same side of the first center line o1.

[0145] The first arc surface 371 and the first arc sliding surface 372 face opposite directions. That is, one of the first arc surface 371 and the first arc sliding surface 372 faces the first center line o1, while the other faces away from the first center line o1. Specifically, when the first arc surface 371 faces the first center line o1, the first arc sliding surface 372 faces away from the first center line o1. When the first arc surface 371 faces away from the first center line o1, the first arc sliding surface 372 faces the first center line o1. In the specific examples shown in Figures 12 and 13, the first arc surface 371 faces away from the first center line o1, while the first arc sliding surface 372 faces the first center line o1.

[0146] The first arc surface 371 and the first arc sliding surface 372 are both arched toward the side where the base 31 is located. In other examples, when the foldable electronic device 100 is an outward-folding electronic device, the first arc surface 371 and the first arc sliding surface 372 are arched toward the side away from the base 31.

[0147] The extension path of the first arc surface 371 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semi-circular arc (i.e., an arc with a central angle equal to 180°), and is not specifically limited here. Similarly, the extension path of the first arc sliding surface 372 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semi-circular arc (i.e., an arc with a central angle equal to 180°), and is not specifically limited here.

[0148] Continuing with Figures 12 and 13 , when the foldable electronic device 100 switches between the unfolded and folded states, the first mating portion 321 slides along the first arcuate surface 371, and the first connecting portion 322 slides along the first arcuate sliding surface 372. This allows for relative rotation between the first door panel 32 and the first hinge 34 about the first centerline o1. Furthermore, because the first arcuate surface 371 and the first arcuate sliding surface 372 face opposite directions, the first mating portion 321 and the first connecting portion 322 can be positioned radially between the first arcuate surface 371 and the first arcuate sliding surface 372, or vice versa, between the first mating portion 321 and the first connecting portion 322, ensuring high mating reliability.

[0149] Continuing to refer to Figures 12 and 13, the first matching portion 321 and the first connecting portion 322 are distributed along the Y-axis. The first arc surface 371 and the first arc sliding surface 372 are also distributed along the Y-axis. Thus, the first arc surface 371 and the first arc sliding surface 372 are offset in the radial direction of the first arc surface 371. Therefore, the matching reliability between the first matching portion 321 and the first arc surface 371, and the matching reliability between the first connecting portion 322 and the first arc sliding surface 372 will not be limited by the radial distance between the first arc surface 371 and the first arc sliding surface 372. This is beneficial for reducing the overall Z-direction size of the first hinge 34 and the first connecting structure 37 by reducing the radial distance between the first arc surface 371 and the first arc sliding surface 372 in the first arc surface 371, while ensuring that the first arc surface 371 and the first arc sliding surface 372 have a relatively large arc length to ensure that the first hinge 34 and the first door panel 32 can be reliably matched, thereby facilitating the thinning of the rotating shaft mechanism 3.

[0150] It is worth noting that "the first arc surface 371 and the first arc sliding surface 372 are distributed in the Y-axis direction" means that the first arc surface 371 and the first arc sliding surface 372 can be spaced apart in the Y-axis direction or not. Similar descriptions should be understood in the following text and will not be repeated. In the specific examples shown in Figures 12 and 13, the first arc surface 371 and the first arc sliding surface 372 are spaced apart in the Y-axis direction.

[0151] The diameter of the first arc surface 371 can be larger than the diameter of the first arc sliding surface 372, or smaller, or even equal to the diameter of the first arc sliding surface 372. On this basis, in order to further reduce the overall dimensions of the first hinge 34 and the first connecting structure 37 in the Z direction and further achieve a thinner design for the rotating shaft mechanism 3, the absolute value of the difference between the diameters of the first arc surface 371 and the first arc sliding surface 372 is greater than or equal to 0 and less than or equal to 2 mm. For example, the absolute value of the difference between the diameters of the first arc surface 371 and the first arc sliding surface 372 is 0, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, or 1.9 mm. In other examples, the absolute value of the difference between the diameters of the first arc surface 371 and the first arc sliding surface 372 may also be greater than 2 mm, for example, 2.5 mm or 3 mm.

[0152] Continuing with Figures 12 and 13 , the first connecting structure 37 is an opening formed in the first hinge 34. In the specific example shown in Figures 12 and 13 , the opening is a through hole extending from the end of the first hinge 34 facing the first door panel 32 to the end of the first hinge 34 facing away from the first door panel 32. In other examples, the opening may also be a blind hole, recessed from the end of the first hinge 34 facing the first door panel 32 to the surface facing away from the first door panel 32. It is sufficient that one end of the opening faces the first door panel 32.

[0153] Both the first arc surface 371 and the first arc sliding surface 372 are disposed within the opening. It is worth noting that "the first arc surface 371 is disposed within the opening" means that the first arc surface 371 is completely within the opening, or it may be partially within the opening. Similarly, "the first arc sliding surface 372 is disposed within the opening" means that the first arc sliding surface 372 is completely within the opening, or it may be partially within the opening.

[0154] The first matching portion 321 protrudes from the first door panel 32. Specifically, the first matching portion 321 is provided on a surface of the first door panel 32 that faces away from the first sub-support surface M31 and protrudes from the surface.

[0155] The first mating portion 321 and the first door panel 32 can be integrally formed, that is, they can be one-piece molded components. This improves the connection strength between the first mating portion 321 and the first door panel 32, simplifies the processing, and reduces manufacturing costs. In other examples, the first mating portion 321 and the first door panel 32 can also be connected by gluing, welding, clamping, or screwing.

[0156] The first connection portion 322 protrudes from the first door panel 32. Specifically, the first connection portion 322 is provided on a surface of the first door panel 32 that faces away from the first sub-support surface M31 and protrudes from the surface.

[0157] The first connecting portion 322 and the first door panel 32 may be integrally formed, that is, they may be integrally molded. This improves the connection strength between the first connecting portion 322 and the first door panel 32, simplifies the processing, and reduces manufacturing costs. In other examples, the first connecting portion 322 and the first door panel 32 may be connected by gluing, welding, clamping, or screwing.

[0158] On this basis, the first connecting portion 322 and the first matching portion 321 can be connected. Specifically, the first connecting portion 322 and the first matching portion 321 can be a structural entity, that is, the first connecting portion 322 and the first matching portion 321 can be an integrally formed part. This is beneficial for improving the connection strength between the first connecting portion 322 and the first matching portion 321, simplifying the processing technology, and reducing manufacturing costs. In other examples, the connection method between the first connecting portion 322 and the first matching portion 321 can also be gluing, welding, clamping or screw connection. Alternatively, in other examples, the first connecting portion 322 and the first matching portion 321 can also be spaced apart.

[0159] The first matching portion 321 can extend into the opening to match the first arc surface 371, and the first connecting portion 322 can extend into the opening to match the first arc sliding surface 372. In this way, the structure is compact and the volume of the rotating shaft mechanism 3 is small.

[0160] Of course, the present application is not limited to this. In other examples, the first matching portion 321 and the first connecting portion 322 may also be an open hole structure provided on the first door panel 32, and the first connecting structure 37 is a structure protruding from the first hinge 34, and the first arc surface 371 and the first arc sliding surface 372 on the first connecting structure 37 extend into the interior of the open hole structure.

[0161] Continuing to refer to FIG. 12 and FIG. 13 , the opening has a first side wall surface 373 , a second side wall surface 374 and a third side wall surface 375 .

[0162] The first side wall 373 and the second side wall 374 face each other in the extending direction of the first center line o1. The third side wall 375 connects between an end of the first side wall 373 adjacent to the base 31 and an end of the second side wall 374 adjacent to the base 31.

[0163] A boss 376 extending toward the second side wall 374 is formed at one end of the first side wall 373 away from the third side wall 375. The first mating portion 321 is located between the boss 376 and the third side wall 375. The boss 376 has a first arcuate surface 371 formed on its surface facing the first mating portion 321. This simplifies the structure.

[0164] Continuing with Figures 12 and 13 , the first mating portion 321 has a first arc-shaped mating surface 3211. The extension path of the first arc-shaped mating surface 3211 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), without specific limitations herein. In the embodiment shown in Figures 12 and 13 , the extension path of the first arc-shaped mating surface 3211 is a minor arc.

[0165] The center line of the first arc mating surface 3211 is the first center line o1. The diameter of the first arc mating surface 3211 is equal to that of the first arc surface 371. When the foldable electronic device 100 switches between the unfolded state and the folded state, the first mating portion 321 slides along the first arc surface 371 with the aid of the first arc mating surface 3211. Because the first arc mating surface 3211 and the first arc surface 371 share a common center line and have the same diameter, the contact area between the first arc mating surface 3211 and the first arc surface 371 is large, and the reliability of the sliding fit between the two is high.

[0166] Continuing to refer to Figures 12 and 13, the first mating portion 321 forms a limited space C5 between the first door panel 32 and the side toward which the first arcuate mating surface 3211 faces. The boss 376 is located within the limited space C5. This makes the entire structure simple and compact, facilitating a reduction in the thickness of the hinge mechanism 3 and achieving a thinner profile.

[0167] It is understandable that, in other examples, the first arc-shaped mating surface 3211 may not be provided on the first mating portion 321 .

[0168] Continuing with Figures 12 and 13, the second sidewall surface 374 includes a first region 3741 and a second region 3742. The second region 3742 is recessed relative to the first region 3741, away from the first sidewall surface 373, to define a recessed groove 377. The first connecting portion 322 is positioned within the recessed groove 377. The first arcuate sliding surface 372 is formed on the sidewall of the recessed groove 377. This results in a simple and compact structure, facilitating a reduction in the thickness of the hinge mechanism 3 and achieving a thinner profile.

[0169] Continuing with Figures 12 and 13 , the first connecting portion 322 has a first arcuate matching surface 3221. The extension path of the first arcuate matching surface 3221 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), without specific limitations herein. In the embodiment shown in Figures 12 and 13 , the extension path of the first arcuate matching surface 3221 is a minor arc.

[0170] The centerline of the first arcuate fitting surface 3221 is the first centerline o1. The diameters of the first arcuate fitting surface 3221 and the first arcuate sliding surface 372 are equal. When the foldable electronic device 100 switches between the unfolded state and the folded state, the first connecting portion 322 slides along the first arcuate sliding surface 372 with the aid of the first arcuate fitting surface 3221. Because the first arcuate fitting surface 3221 and the first arcuate sliding surface 372 share a common centerline and have equal diameters, the contact area between the first arcuate fitting surface 3221 and the first arcuate sliding surface 372 is large, and the sliding fit between the two is highly reliable.

[0171] It is understandable that, in other examples, the first arc adapting surface 3221 may not be provided on the first connecting portion 322 .

[0172] Continuing with Figures 12 and 13, the first mating portion 321 includes a stopper 3212 protruding from the first arcuate mating surface 3221. In the direction of the first centerline o1, the stopper 3212 is positioned between the first sidewall 373 and the first region 3741. This not only helps to position the first mating portion 321 and the first connecting portion 322 within the opening, but also helps to position the first door panel 32 and the first hinge 34 in the Y-axis direction, preventing relative movement between the two and improving the reliability of their mating.

[0173] In other examples, the first matching portion 321 may not be provided with the limiting portion 3212. Exemplarily, the surface of the first matching portion 321 facing away from the first arc surface 371 is flush with the first arc matching surface 3221 and is a common cylindrical surface.

[0174] Continuing with Figures 12 and 13, a connecting rib 3217 is provided at one end of the first arcuate mating surface 3211 adjacent to the first connecting portion 322. The connecting rib 3217 is connected to the first door panel 32 and the first connecting portion 322, respectively. This helps to improve the overall structural strength of the first mating portion 321, the first connecting portion 322, and the first door panel 32.

[0175] On this basis, the connecting rib 3217 and the first connecting portion 322 are integrally restrained between the bottom wall of the recessed groove 377 and the boss 376. This not only helps to secure the first mating portion 321 and the first connecting portion 322 within the opening, but also helps to position the first door panel 32 and the first hinge member 34 along the Y-axis, preventing relative movement between the two in the Y-axis direction and improving the reliability of their engagement. Furthermore, in conjunction with the aforementioned retaining portion 3212, this provides a dual restraint mechanism, achieving even greater effectiveness.

[0176] On this basis, in order to prevent the connecting rib 3217, the first matching part 321, and the first connecting part 322 as a whole from interfering with the first hinge 34 during the switching process between the unfolded state and the folded state, the opening extends to the end of the first hinge 34 away from the base 31.

[0177] In some embodiments, please refer to Figures 14 and 15. Figure 14 is a partial schematic diagram of the first door panel 32, first mating portion 321, and first connecting portion 322 shown in Figures 12 and 13. Figure 15 is a side view of the structure shown in Figure 14. The surface of the first mating portion 321 (also known as the retaining portion 3212) facing away from the first arcuate surface 371 is a curved structural surface 3215. The centerline of this curved structural surface 3215 is the first centerline o1. As a result, the first mating portion 321 is formed into an arc shape. This not only simplifies the structure and facilitates manufacturing, but also, because the curved structural surface 3215 is centered on the first centerline o1, the distance between the curved structural surface 3215 and the third sidewall 375 remains unchanged during the transition of the foldable electronic device 100 between the unfolded and folded states, thereby preventing interference between the curved structural surface 3215 and the third sidewall 375.

[0178] Of course, the present application is not limited to this. In other examples, the first mating portion 321 may not be provided with the arc-shaped structural surface 3215. For example, the first mating portion 321 is formed into a semi-cylindrical shape, a 1 / 4 semi-cylindrical shape, or a 1 / 3 semi-cylindrical shape, as long as the first mating portion 321 has a first arc mating surface 3211.

[0179] On this basis, please continue to refer to Figures 14 and 15 , an avoidance surface 3216 is formed at one end of the arc-shaped structural surface 3215 away from the first door panel 32. Exemplarily, the avoidance surface 3216 includes but is not limited to a flat surface or a curved surface.

[0180] In a plane perpendicular to the first centerline o1, the tangent line of one end of the arcuate structural surface 3215 adjacent to the avoidance surface 3216 is the first tangent line L1. The avoidance surface 3216 is located on the side of the first tangent line L1 close to the first door panel 32. In this way, when the opening is a through hole, the avoidance surface 3216 can prevent interference with the first housing 1 during relative rotation between the first door panel 32 and the first hinge 34. When the opening is a blind hole, the avoidance surface 3216 can prevent interference with the bottom wall of the blind hole during relative rotation between the first door panel 32 and the first hinge 34. At the same time, the provision of the avoidance surface 3216 can also reduce the overall Z-direction dimensions of the first door panel 32 and the first mating portion 321, thereby further reducing the thickness of the hinge mechanism 3.

[0181] In other examples, the first matching portion 321 may not be provided with the aforementioned avoidance surface 3216 .

[0182] Please continue to refer to Figures 14 and 15. On the circumference of the cylindrical surface where the first arc matching surface 3221 is located, the surface of the first connecting part 322 also includes a first plane 3213 and a second plane 3214. The first connecting part 322 is fixed to the first door panel 32 by means of the first plane 3213. One end of the first plane 3213 is connected to one end of the second plane 3214. The other end of the first plane 3213 and the other end of the second plane 3214 extend in directions away from each other and the angle between the two is less than or equal to 90°. The first arc matching surface 3221 is connected between the other end of the first plane 3213 and the other end of the second plane 3214. In this way, the orthographic projection of the entire first connecting part 322 on the plane where the first door panel 32 is located is located on the first door panel 32, and the structure is compact.

[0183] In the specific examples shown in Figures 14 and 15, the first connection portion 322 is substantially fan-shaped. In other examples, the first connection portion 322 may also be cylindrical or cubic.

[0184] Example 2

[0185] Please refer to Figures 16, 17, and 18. Figure 16 is a schematic diagram of a support device 10 in a folded state according to further embodiments of the present application. Figure 17 is a schematic diagram of the coordination of the first door panel 32, the first middle frame 11, and the first hinge 34 in the cross-sectional structure of the support device 10 at line EE shown in Figure 16. Figure 18 is an enlarged view of the circled portion at F of the structure shown in Figure 17. This embodiment differs from the above-mentioned embodiments in that:

[0186] The first door panel 32 is provided with a first matching portion 321 and a first connecting portion 322 .

[0187] The first hinge member 34 is provided with a first connecting structure 37. The first connecting structure 37 is provided with a first arc surface 371. The center line of the first arc surface 371 is a first center line o1. The first center line o1 extends along the Y-axis. The extension path of the first arc surface 371 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), without specific limitation herein.

[0188] The first housing 1 is provided with a first fixing structure 131. The first fixing structure 131 is provided with a first curved surface 1311. The centerline of the first curved surface 1311 is also the first centerline o1. The extension path of the first curved surface 1311 can be a major arc (i.e., an arc with a central angle greater than 180°), a minor arc (i.e., an arc with a central angle less than 180°), or a semicircular arc (i.e., an arc with a central angle equal to 180°), without specific limitation herein.

[0189] The first arc surface 1311 and the first arc surface 371 are both located on the same side of the first center line o1 .

[0190] The first arcuate surface 1311 and the first arcuate surface 371 face opposite directions. That is, one of the first arcuate surface 1311 and the first arcuate surface 371 faces the first centerline o1, while the other faces away from the first centerline o1. Specifically, when the first arcuate surface 371 faces the first centerline o1, the first arcuate surface 1311 faces away from the first centerline o1. When the first arcuate surface 371 faces away from the first centerline o1, the first arcuate surface 1311 faces the first centerline o1. In the specific example shown in FIG18 , the first arcuate surface 1311 faces the first centerline o1, while the first arcuate surface 371 faces away from the first centerline o1.

[0191] The first curved surface 1311 and the first arc surface 371 are both arched toward the side where the base 31 is located. In other examples, when the foldable electronic device 100 is an outward-folding electronic device, the first curved surface 1311 and the first arc surface 371 are arched toward the side away from the base 31.

[0192] Continuing with Figures 16 and 17 , during at least one portion of the switching path between the unfolded and folded states of the foldable electronic device 100, the first engaging portion 321 slides along the first arcuate surface 371, and the first connecting portion 322 slides along the first arcuate surface 1311. Specifically, because the first housing 1 and the first hinge 34 are fixedly connected, the first engaging portion 321 slides along the first arcuate surface 371, and the first connecting portion 322 slides along the first arcuate surface 1311, thereby enabling relative rotation between the first door panel 32 and the first hinge 34 about the first circle centerline o1. Furthermore, since the first arc surface 371 and the first curved surface 1311 are oriented in opposite directions, the first mating portion 321 and the first connecting portion 322 can be confined between the first arc surface 371 and the first curved surface 1311, or the first arc surface 371 and the first curved surface 1311 can be confined between the first mating portion 321 and the first connecting portion 322 in the radial direction of the first arc surface 371, thereby enhancing the reliability of the mating. Furthermore, providing the first curved surface 1311 on the first housing 1 avoids providing a curved surface on the first hinge 34 for sliding engagement with the first connecting portion 322, or reduces the length of the curved surface provided on the first hinge 34 for sliding engagement with the first connecting portion 322, thereby reducing the thickness of the first hinge 34 and the size of the hinge mechanism 3 in the Z direction, further achieving a thinner design for the hinge mechanism 3. Furthermore, since the spatial layout of the first shell 1 is relatively large, the arc length of the first curved surface 1311 provided on the first shell 1 can be set relatively large, which is beneficial to improving the reliability of the cooperation between the first hinge 34 and the first door panel 32.

[0193] Please continue to refer to Figure 19, which is a partial schematic diagram of the hinge mechanism shown in Figure 18 during the transition between the unfolded and folded states. As shown in Figure 19(a), in the unfolded state, the first connecting portion 322 engages with the first curved surface 1311. As shown in Figure 19(b), when switching from the unfolded state to the folded state, the first connecting portion 322 slides along the first curved surface 1311. As shown in Figure 19(c), in the folded state, the first connecting portion 322 engages with the first curved surface 1311. In this way, throughout the entire transition path between the unfolded and folded states of the foldable electronic device 100, the first connecting portion 322 slides only along the first curved surface 1311. In this case, there is no need to provide a separate curved surface on the first hinge 34 for sliding engagement with the first connecting portion 322, which helps further reduce the thickness of the first hinge 34 and further achieve a thinner design for the hinge mechanism 3.

[0194] Please continue to refer to Figures 18 and 19. The first arc surface 1311 is located on the side of the first arc surface 371 away from the first center line o1. The first arc surface 371 faces the first arc surface 1311. Therefore, the first arc surface 371 and the first arc surface 1311 are at least partially opposite in the radial direction. Therefore, a first arc groove 3411 can be defined between the two. When the foldable electronic device 100 switches between the unfolded state and the folded state, the first connecting portion 322 and the first matching portion 321 are both located in the first arc groove 3411. In this way, the structure is simple and the reliability of the matching is higher.

[0195] Furthermore, because the first curved surface 1311 is located on the side of the first arcuate surface 371 that is farther from the first centerline o1, the diameter of the first curved surface 1311 is greater than the diameter of the first arcuate surface 371. Therefore, when the first door panel 32 rotates by the same angle, the movement path of the first connecting portion 322 is necessarily greater than the movement path of the first mating portion 321. This further optimizes the arc length of the first curved surface 1311, improving the reliability of the mating between the first connecting portion 322 and the first curved surface 1311, and thus improving the reliability of the mating between the first hinge 34 and the first door panel 32.

[0196] Continuing with Figures 18 and 19, the first fixing structure 131 is fixed to the surface of the first connecting plate 13 that faces the same direction as the first supporting surface M1. The first fixing structure 131 is located at one end of the first connecting plate 13 near the first side surface 1121. This allows the first door panel 32 and the first hinge 34 to be shielded by the first connecting plate 13, thereby protecting these parts of the structure and improving the aesthetics and compactness of the structure.

[0197] Continuing with Figures 18 and 19 , the first fixing structure 131 is a protruding structure protruding from the first connecting plate 13. Specifically, the first fixing structure 131 and the first connecting plate 13 can be a single structural unit, that is, they can be integrally formed. This helps improve the connection strength between the first fixing structure 131 and the first connecting plate 13, simplifies the processing, and reduces manufacturing costs. In other examples, the connection between the first fixing structure 131 and the first connecting plate 13 can also be achieved by gluing, welding, clamping, or screwing.

[0198] The first connection structure 37 is a through hole 37a formed on the first hinge 34. The through hole 37a extends from one end of the first hinge 34 facing the first door panel 32 to the other end of the first hinge 34 facing away from the first door panel 32.

[0199] The first arc surface 371 is formed on the hole wall of the through hole 37a. The first fixing structure 131 is located in the through hole 37a. As a result, the structure is compact, which is conducive to reducing the overall size of the rotating shaft mechanism 3 in the Z direction and realizing a thin design of the rotating shaft mechanism 3.

[0200] Continuing with Figures 18 and 19, a curved slider 320 is provided on the surface of the first door panel 32 facing away from the first sub-support surface M31. One end of the curved slider 320 is connected to the first door panel 32 along its own extension path. The curved surfaces on either side of the curved slider 320 are respectively a first arc mating surface 3211 and a first arc adapting surface 3221. The center lines of both the first arc mating surface 3211 and the first arc adapting surface 3221 are the first center line o1.

[0201] The first arcuate mating surface 3211 is the first mating portion 321, and the diameter of the first arcuate mating surface 3211 is equal to that of the first arcuate surface 371. As a result, the contact area between the first arcuate mating surface and the first arcuate surface 371 is large, and the reliability of the sliding fit between the two is high.

[0202] The first arcuate matching surface 3221 is the first connecting portion 322, and the diameter of the first arcuate matching surface 3221 is equal to that of the first arcuate surface 1311. Therefore, the contact area between the first arcuate matching surface 3221 and the first arcuate surface 1311 is large, and the reliability of the sliding fit between the two is high.

[0203] In some embodiments, in the unfolded state, the overlap width between the first arcuate matching surface 3221 and the first curved surface 1311 is greater than or equal to 0.3 mm and less than or equal to 2 mm. Specifically, if the overlap width between the first arcuate matching surface 3221 and the first curved surface 1311 is set too small, it is easy to cause unreliable fit between the first door panel 32 and the first hinge 34. On the other hand, if the overlap width between the first arcuate matching surface 3221 and the first curved surface 1311 is set too large, the arc length between the first arcuate matching surface 3221 and the first curved surface 1311 will inevitably increase, which will cause the overall size of the hinge mechanism 3 to become larger, which is not conducive to the thinning of the hinge mechanism 3. Based on this, in the unfolded state, the overlap width between the first arc matching surface 3221 and the first arc surface 1311 is greater than or equal to 0.4 mm and less than or equal to 2 mm, which is conducive to further taking into account the reliability of the cooperation between the first door panel 32 and the first hinge 34 and the thin design of the hinge mechanism 3.

[0204] Exemplarily, the overlap width between the first arcuate matching surface 3221 and the first arcuate surface 1311 is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, or 1.9 mm.

[0205] It is worth noting that when the first arcuate matching surface 3221 overlaps the first curved surface 1311, an overlapping region is formed between the first arcuate matching surface 3221 and the first curved surface 1311. This overlapping region is also arc-shaped. When measuring the overlapping width, the overlapping width can refer to the arc length of the overlapping region or the chord length of the overlapping region.

[0206] Please refer to Figure 20, which is an exploded view of the partial structure of the first door panel 32 and the first hinge 34 shown in Figure 17. A connecting rib 3217 is provided at one end of the curved slider 320 along the Y-axis. The connecting rib 3217 is connected to the first door panel 32. This helps to improve the connection strength between the curved slider 320 and the first door panel 32.

[0207] For example, the connecting rib 3217, the first door panel 32, and the curved slider 320 can be integrally formed, thereby simplifying the processing and reducing manufacturing costs. In other examples, the connecting rib 3217 and the first door panel 32, as well as the connecting rib 3217 and the curved slider 320, can be connected by gluing, welding, clamping, or screwing.

[0208] Please continue to refer to Figure 20, and in conjunction with Figure 21, which shows an assembly diagram of the partial structure of the first door panel 32 and the first hinge 34, based on the structure shown in Figure 20. To prevent the connecting rib 3217 from interfering with the relative movement between the first door panel 32 and the first hinge 34, a relief hole 378 is provided in the first hinge 34. The relief hole 378 is located at one end of the through hole 37a in the Y-axis direction and communicates with the through hole 37a. The connecting rib 3217 extends through the relief hole 378.

[0209] On this basis, in order to prevent interference between the connecting rib 3217 and the first hinge 34 , the avoidance hole 378 extends to the end of the first hinge 34 away from the base 31 .

[0210] Please refer to Figure 22, which is a cross-sectional view of the assembly of the first middle frame 11, the first hinge 34, and the first door panel 32 according to yet other embodiments provided by this application. Figure 23 is an enlarged view of the portion circled at position H according to the structure shown in Figure 22. This embodiment differs from the embodiment shown in Figures 16 to 21 described above in that a first arcuate sliding surface 372 is provided on the first hinge 34. In the specific example shown in Figure 23, the first arcuate sliding surface 372 is formed on the hole wall of the through hole 37a that faces the first arcuate surface 371.

[0211] The first arc sliding surface 372 and the first arc surface 1311 are co-cylindrical. In other words, the center line of the first arc sliding surface 372 is the first center line o1. The diameters of the first arc sliding surface 372 and the first arc surface 1311 are equal. The first arc sliding surface 372 is located on the side of the first arc surface 1311 that is closer to the base 31 along the arc extension trajectory of the first arc surface 1311 itself. The first arc sliding surface 372 faces the first arc surface 371, that is, the first arc sliding surface 372 and the first arc surface 371 are at least partially radially opposite. In this way, the first arc sliding surface 372 and the first arc surface 371 can define a second arc-shaped sliding groove 3412. In this way, the overall arc length of the first arc surface 1311 and the first arc sliding surface 372 is larger. When the foldable electronic device 100 switches between the unfolded state and the folded state, the first connecting part 322 slides along the first arc sliding surface 372, and the arc slider 320 slides in the second arc sliding groove 3412. Not only is the structure simple, but the reliability of the fit is also higher.

[0212] Exemplarily, the central angle corresponding to the first arc sliding surface 372 is less than or equal to 40°. For example, the central angle corresponding to the first arc sliding surface 372 is 30°, 25°, 20°, 10°, or 5°.

[0213] Exemplarily, the arc length of the first arc sliding surface 372 is less than or equal to 1 mm. For example, the arc length of the first arc sliding surface 372 is 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, 0.4 mm, or 0.3 mm.

[0214] In some specific examples, please refer to Figure 24, which is a partial schematic diagram of the process of switching between the unfolded state and the folded state of the foldable electronic device 100 according to the structure shown in Figure 22. As shown in (a) of Figure 24, in the unfolded state, the first connecting portion 322 cooperates with the first arc sliding surface 372, and the first connecting portion 322 cooperates with the first curved surface 1311. As shown in (b) of Figure 24, when the foldable electronic device 100 switches from the unfolded state to the folded state, the first connecting portion 322 slides along the first arc sliding surface 372 and the first curved surface 1311. When the foldable electronic device 100 switches to the folded state, as shown in (c) of Figure 24, the first connecting portion 322 cooperates with the first arc sliding surface 372, and the first connecting portion 322 cooperates with the first curved surface 1311.

[0215] It is understandable that in other examples, the first connection portion 322, the first arc sliding surface 372 and the first curved surface 1311 may also have other forms of cooperation during the process of switching between the unfolded state and the folded state. Specifically, please refer to Figure 25, which is a partial schematic diagram of the process of switching between the unfolded state and the folded state of the foldable electronic device 100 in other embodiments of the present application. As shown in (a) of Figure 25, in the unfolded state, the first connection portion 322 cooperates with the first arc sliding surface 372, and the first connection portion 322 does not cooperate with the first curved surface 1311. As shown in (b) of Figure 25, when the foldable electronic device 100 switches from the unfolded state to the folded state to a preset angle, the first connection portion 322 slides along the first arc sliding surface 372 and the first curved surface 1311 at the same time. When the foldable electronic device 100 switches to the folded state, as shown in (c) of FIG. 25 , the first connection portion 322 cooperates with the first arc sliding surface 372 , and the first connection portion 322 cooperates with the first arc surface 1311 .

[0216] It is worth noting that in any of the embodiments shown in Figures 16 to 25 of Example 2, the description is based on an example in which the first arc surface 371 faces the first arc-shaped surface 1311. In other examples, the first arc surface 371 and the first arc-shaped surface 1311 may be offset in the radial direction, that is, the first arc surface 371 and the first arc-shaped surface 1311 are distributed in the Y-axis direction. In this way, the matching reliability between the first matching portion 321 and the first arc surface 371, and the matching reliability between the first connecting portion 322 and the first arc surface 1311 will not be limited by the radial distance between the first arc surface 371 and the first arc surface 1311. This is beneficial for further reducing the overall thickness of the first hinge 34 and the first connecting structure by reducing the radial distance between the first arc surface 371 and the first arc surface 1311 in the first arc surface 371, while ensuring that the first arc surface 371 and the first arc surface 1311 have a relatively large arc length to ensure that the first hinge 34 and the first door panel 32 can be reliably matched, thereby further realizing the thinning of the hinge mechanism 3.

[0217] On this basis, when the first hinge 34 is further provided with a first arcuate sliding surface 372, the first arcuate sliding surface 372 and the first curved surface 1311 are distributed along the length direction of the Y axis. In this case, the specific structure and connection relationship of the first door panel 32, the first hinge 34, the first connecting portion 322, the first matching portion 321, and the first connecting structure 37 can be referred to in the above-mentioned Example 1 and will not be repeated here.

[0218] Based on any one of the above examples 1 and 2, in some embodiments, a second matching portion and a second connecting portion are provided on the second door panel 33 .

[0219] The second hinge 35 is provided with a second connecting structure. The second connecting structure includes a second arc surface and a second arc sliding surface. The center lines of the second arc surface and the second arc sliding surface are both the second center line. The second center line extends along the Y-axis and is arranged parallel to the first center line o1.

[0220] The second arc surface and the second arc sliding surface are on the same side of the second center line of the circle. The second arc surface and the second arc sliding surface are oriented in opposite directions. When the foldable electronic device 100 switches between the unfolded state and the folded state, the second matching portion slides along the second arc surface, and the second connecting portion slides along the second arc sliding surface. In this way, relative rotation between the second door panel 33 and the second hinge 35 with the second center line as the rotation center line can be achieved. Moreover, since the second arc surface and the second arc sliding surface are oriented in opposite directions, in the radial direction of the second arc surface, the second matching portion and the second connecting portion can be limited between the second arc surface and the second arc sliding surface, or the second arc surface and the second arc sliding surface can be limited between the second matching portion and the second connecting portion, and the reliability of the matching is high.

[0221] On this basis, the second matching portion and the second connecting portion are distributed in the Y-axis direction. The second arc surface and the second arc sliding surface are distributed in the Y-axis direction. In this way, the second arc surface and the second arc sliding surface are staggered in the radial direction of the second arc surface. Therefore, the matching reliability of the second matching portion and the second arc surface, and the matching reliability of the second connecting portion and the second arc sliding surface will not be limited by the radial distance between the second arc surface and the second arc sliding surface. This is beneficial to ensure that the second arc surface and the second arc surface have a relatively large arc length to ensure that the second hinge 35 and the second door panel 33 can be reliably matched. Under the premise, it is beneficial to reduce the overall size of the second hinge 35 and the second connection structure in the Z direction by reducing the distance between the second arc surface and the second arc sliding surface in the radial direction of the second arc surface, thereby facilitating the thinning of the rotating shaft mechanism 3.

[0222] In this embodiment, the specific structure of the second mating portion may be the same as that of the first mating portion 321 in Example 1, and the specific structure of the second connecting portion may be the same as that of the first connecting portion 322 in Example 1. The specific structure of the second connecting structure may be the same as that of the first connecting structure 37 in Example 1. The assembly relationship between the second mating portion, the second connecting portion, and the second connecting structure may be the same as the assembly relationship between the first mating portion 321, the first connecting portion 322, and the first connecting structure 37 in Example 1, and will not be repeated here.

[0223] Based on any one of the above examples 1 and 2, in other embodiments, a second matching portion and a second connecting portion are provided on the second door panel 33 .

[0224] The second hinge 35 is provided with a second connecting structure. The second connecting structure is provided with a second arc surface. The center line of the second arc surface is the second center line. The second center line extends along the Y-axis and is parallel to the first center line o1.

[0225] The second housing 2 is provided with a second fixing structure. The second fixing structure is provided with a second arcuate surface. The second arcuate surface and the second arcuate surface are both located on the same side of the second centerline. The second arcuate surface and the second arcuate surface are oriented in opposite directions. During at least one portion of the switching path between the unfolded and folded states of the foldable electronic device, the second mating portion slides along the second arcuate surface, and the second connecting portion slides along the second arcuate surface. Specifically, because the second housing 2 is fixedly connected to the second hinge 35, the second mating portion and the second connecting portion slide along the second arcuate surface. This not only enables relative rotation between the second door panel 33 and the second hinge 35 about the second centerline, but also because the second arcuate surface and the second arcuate surface are oriented in opposite directions, the second mating portion and the second connecting portion can be constrained radially between the second arcuate surface and the second arcuate surface, or between the second mating portion and the second connecting portion, thereby enhancing mating reliability.

[0226] Furthermore, providing the second curved surface on the second housing 2 avoids providing a curved surface on the second hinge 35 for sliding engagement with the second connecting portion, or reduces the length of the curved surface provided on the second hinge 35 for sliding engagement with the second connecting portion, thereby facilitating a reduction in the thickness of the second hinge 35 and further achieving a thinner design for the hinge mechanism 3. Furthermore, since the spatial layout of the second housing 2 is relatively large, the arc length of the second curved surface provided on the second housing 2 can be provided relatively large, thereby improving the reliability of the engagement between the second hinge 35 and the second door panel 33.

[0227] In this embodiment, the specific structure of the second mating portion may be the same as that of the first mating portion 321 in Example 2, and the specific structure of the second connecting portion may be the same as that of the first connecting portion 322 in Example 2. The specific structure of the second connecting structure may be the same as that of the first connecting structure 37 in Example 2. The specific structure of the second fixing structure may be the same as that of the first fixing structure 131 in Example 2. The assembly relationship between the second mating portion, the second connecting portion, the second connecting structure, and the second fixing structure may be the same as the assembly relationship between the first mating portion 321, the first connecting portion 322, the first connecting structure 37, and the first fixing structure 131 in Example 2, and will not be repeated here.

[0228] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0229] 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. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A foldable electronic device, characterized in that, Comprising: A first housing and a rotating shaft mechanism; The rotating shaft mechanism includes a base, a first door panel, and a first hinge member; The first door panel is provided with a first mating portion and a first connecting portion; The first hinge member is fixedly connected to the first housing, and the first hinge member is hinged to one side of the base; The first hinge member is provided with a first connecting structure corresponding to the first mating portion and the first connecting portion on the first door panel. The first connecting structure is provided with a first arc surface and a first arc sliding surface. The center lines of the first arc surface and the first arc sliding surface are both the first center line. The first arc surface and the first arc sliding surface are on the same side of the first center line and face in opposite directions. The first arc surface and the first arc sliding surface are distributed in the extending direction of the first center line; When the foldable electronic device switches between the unfolded state and the folded state, the first mating portion slides along the first arc surface, and the first connecting portion slides along the first arc sliding surface.

2. The foldable electronic device according to claim 1, wherein The first connecting structure is an opening formed on the first hinge member. The first arc surface and the first arc sliding surface are both arranged in the opening, and the first mating portion and the first connecting portion are located in the opening.

3. The foldable electronic device according to claim 2, wherein The opening has a first side wall surface, a second side wall surface, and a third side wall surface. The first side wall surface and the second side wall surface face each other in the extending direction of the first center line. The third side wall surface is connected between one end of the first side wall surface adjacent to the base and one end of the second side wall surface adjacent to the base. A boss extending towards the second side wall surface is provided on the first side wall surface. The first mating portion is located between the boss and the third side wall surface, and the first arc surface is formed on the surface of the boss facing the first mating portion.

4. The foldable electronic device according to claim 3, wherein The first mating portion has a first arc mating surface. A limiting space is formed between the first mating portion and the first door panel on the side towards which the first arc mating surface faces. The boss is located in the limiting space, and the first mating portion is in sliding fit with the first arc surface by means of the first arc mating surface.

5. The foldable electronic device according to claim 4, wherein The second side wall surface includes a first region and a second region. The second region is recessed away from the first side wall surface relative to the first region to define a recessed groove. The first arc sliding surface is formed on the groove side wall of the recessed groove; The first connecting portion is located in the recessed groove.

6. The foldable electronic device according to claim 5, wherein The first mating portion has a limiting portion. In the extending direction of the first center line, the limiting portion is limited between the first side wall surface and the first region.

7. The foldable electronic device according to claim 5 or 6, characterized in that, One end of the first arc mating surface adjacent to the first connecting portion is provided with a connecting rib. The connecting rib is connected to the first door panel and the first connecting portion respectively. The connecting rib and the first connecting portion as a whole are limited between the bottom wall of the recessed groove and the boss.

8. The foldable electronic device according to any one of claims 2-7, characterized in that, The surface of the first mating portion facing away from the first arc surface is an arc-shaped structural surface. The center line of the arc-shaped structural surface is the first center line.

9. The foldable electronic device according to claim 8, wherein An avoidance surface is formed at one end of the arc-shaped structural surface away from the first door panel; In a plane perpendicular to the first center line, a tangent line at one end of the arc-shaped structural surface adjacent to the avoidance surface is the first tangent line, and the avoidance surface is located on the side of the first tangent line close to the first door panel.

10. The foldable electronic device according to any one of claims 1-9, characterized in that, The absolute value of the difference between the diameters of the first arc surface and the first arc sliding surface is greater than or equal to 0 and less than or equal to 2 mm.

11. The foldable electronic device according to any one of claims 1-10, characterized in that, The first engaging portion has a first arc engaging surface, the center line of the first arc engaging surface is the first center line, the diameter of the first arc engaging surface is equal to that of the first arc surface, and the first engaging portion is in sliding fit with the first arc surface by means of the first arc engaging surface; and / or, The first connecting portion has a first arc adapting surface, the center line of the first arc adapting surface is the first center line, the diameter of the first arc adapting surface is equal to that of the first arc sliding surface, and the first connecting portion is in sliding fit with the first arc sliding surface by means of the first arc adapting surface.

12. The foldable electronic device according to any one of claims 1-11, characterized in that, The foldable electronic device includes a second housing; The rotating shaft mechanism further includes a second door panel and a second hinge member The second door panel is provided with a second engaging portion and a second connecting portion; The second hinge member is fixedly connected to the second housing, and the second hinge member is hinged to the other side of the base; The second hinge member is provided with a second connecting structure corresponding to the second engaging portion and the second connecting portion on the second door panel. The second connecting structure is provided with a second arc surface and a second arc sliding surface; the center lines of the second arc surface and the second arc sliding surface are both the second center line, the second arc surface and the second arc sliding surface are on the same side of the second center line and face in opposite directions; the second arc surface and the second arc sliding surface are distributed in the extending direction of the second center line, and the second center line is parallel to the first center line; When the foldable electronic device switches between the unfolded state and the folded state, the second engaging portion slides along the second arc surface, and the second connecting portion slides along the second arc sliding surface.

13. A foldable electronic device, characterized in that, Including: A rotating shaft mechanism and a first housing; The rotating shaft mechanism includes a base, a first door panel and a first hinge member; The first door panel is provided with a first engaging portion and a first connecting portion; The first hinge member is fixedly connected to the first housing, and the first hinge member is hinged to one side of the base; The first hinge member is provided with a first connecting structure corresponding to the first engaging portion and the first connecting portion on the first door panel. The first connecting structure is provided with a first arc surface; The first housing is provided with a first fixing structure, and the first fixing structure is provided with a first arc-shaped surface; The center lines of the first arc-shaped surface and the first arc surface are both the first center line, the first arc-shaped surface and the first arc surface are on the same side of the first center line and face in opposite directions; On at least one switching path in the switching path for the foldable electronic device to switch between the unfolded state and the folded state, the first engaging portion slides along the first arc surface, and the first connecting portion slides along the first arc-shaped surface.

14. The foldable electronic device according to claim 13, wherein, The first arc surface is located on the side of the first circular arc surface away from the first center line and faces the first circular arc surface.

15. The foldable electronic device according to claim 14, wherein An arc-shaped slider is provided on the first door panel. The arc surfaces on the two radial sides of the arc-shaped slider are respectively a first circular arc mating surface and a first circular arc adapting surface. The first mating portion is the first circular arc mating surface, and the first connecting portion is the first circular arc adapting surface; The center lines of both the first circular arc mating surface and the first circular arc adapting surface are the first center line; Wherein, the diameter of the first circular arc mating surface is equal to the diameter of the first circular arc surface, and the diameter of the first circular arc adapting surface is equal to the diameter of the first arc surface.

16. The foldable electronic device according to claim 15, wherein In the unfolded state, the overlapping width dimension between the first circular arc adapting surface and the first arc surface is greater than or equal to 0.3 mm and less than or equal to 2 mm.

17. The foldable electronic device according to claim 13, wherein The first arc surface and the first circular arc surface are distributed in the extending direction of the first center line.

18. The foldable electronic device according to any one of claims 13-17, wherein The first connecting structure is a through hole formed in the first hinge member. The first circular arc surface is formed on the hole wall of the through hole, and the first fixing structure is located inside the through hole.

19. The foldable electronic device according to any one of claims 13-18, characterized in that, During the entire switching path of the foldable electronic device switching between the unfolded state and the folded state, the first connecting portion only slides along the first arc surface.

20. The foldable electronic device according to any one of claims 13-18, characterized in that, The first connecting structure is provided with a first circular arc sliding surface, and the first circular arc sliding surface and the first arc surface are co-cylindrical surfaces; The first circular arc sliding surface is located on the side of the first arc surface close to the base along the arc extension trajectory of the first arc surface itself; the first connecting portion is in sliding fit with the first circular arc sliding surface.

21. The foldable electronic device according to claim 20, wherein, The foldable electronic device is the foldable electronic device according to claim 18; The first circular arc sliding surface is formed on the hole wall of the through hole facing the first circular arc surface, and the first circular arc sliding surface faces the first circular arc surface.

22. The foldable electronic device according to any one of claims 13-21, characterized in that, The first housing includes a first middle frame and a first connecting plate; The first middle frame has a first supporting surface. The first middle frame also has a first side face facing the rotating shaft mechanism. The first connecting plate is on the side of the first middle frame close to the rotating shaft mechanism. The first connecting plate and the first supporting surface are at opposite ends of the first side face. The first fixing structure is fixed on the surface of the first connecting plate facing the same direction as the first supporting surface and is located at one end of the first connecting plate close to the first side face.

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