Flexible screen protection device and flexible screen device

Abstract

The application provides a folding mechanism and an electronic device. The folding mechanism can provide protection for a flexible screen when a foldable electronic device is folded, so as to avoid reverse arching or deformation of the flexible screen. The folding mechanism comprises a middle frame, a first door plate and a second door plate, the first door plate and the second door plate are attached to the flexible screen through an adhesive, one end of the first door plate and the second door plate is movably connected to the middle frame, the first door plate and the second door plate are provided with a track on a surface parallel to the middle frame, a middle plate is fixed to the lower surface side of the folding area of the flexible screen, a first connecting rod and a second connecting rod, one end of the first connecting rod and the second connecting rod is movably connected to the first end and the second end of the middle plate, the other end of the first connecting rod and the second connecting rod is respectively provided with a first pin and a second pin, the first pin slides in the track on the first surface of the first door plate, and the second pin slides in the track on the first surface of the second door plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular, to a flexible screen protection device and a flexible screen device. BACKGROUND

[0002] With the increasing maturity of flexible folding screen technology and the continuous improvement of the performance of the whole machine hinge mechanism, flexible folding terminal products will inevitably be a major trend in the future. Folding terminal products (such as folding mobile phones, folding tablets, folding computers, folding televisions, and other electronic devices) need to meet higher reliability, better operation experience, and industrial design (ID) appearance in order to be accepted by consumers. Taking foldable mobile phones as an example, unlike the flip phones (screen built-in) of the past, the flexible folding mobile phone screen is continuously foldable. In order to ensure that the screen is not stretched or compressed during folding, the product whole appearance will have a large deformation in the folding part, and the folding part can be a flexible material or a hinge, etc. The general structure cannot achieve such a large deformation, so there are reliability problems such as cracks, fractures, and low life. Figure 1 A schematic diagram of the deformation of the folding part of a flexible folding product is shown, as shown in Figure 1 The shadow part is the folding area. When the phone is folded from flat to bent, L1 is stretched, L2 is compressed, and the length changes greatly. The smaller the bending radius, the greater the stretching and compression ratio, and the general structure and material are difficult to achieve such a large deformation. Therefore, special support mechanisms are needed for the folding and deformation part of the flexible folding terminal product to meet the product's folding function, appearance, whole operation experience, and reliability requirements. SUMMARY

[0003] The present application provides a folding mechanism and an electronic device, which can provide protection for the flexible screen when the foldable electronic device is folded, avoiding the reverse arching or deformation of the flexible screen.

[0004] In a first aspect, a folding mechanism is provided, which can be applied to a foldable electronic device. The folding mechanism comprises: a middle frame, which is attached to a flexible screen by an adhesive; a door plate group, which comprises a first door plate and a second door plate, the first door plate and the second door plate are arranged symmetrically on both sides of a folding area of the flexible screen, and are attached to the flexible screen by the adhesive, one end of the first door plate is movably connected to the middle frame, one end of the second door plate is movably connected to the middle frame, and the first door plate and the second door plate are provided with tracks on a plane parallel to the middle frame; an intermediate plate, which is fixed to a lower surface side of the folding area of the flexible screen; and a connecting rod group, which comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is movably connected to a first end of the intermediate plate, the other end of the first connecting rod is provided with a first pin, the first pin slides in the track on a first plane of the first door plate, one end of the second connecting rod is movably connected to a second end of the intermediate plate, the other end of the second connecting rod is provided with a second pin, and the second pin slides in the track on a first plane of the second door plate.

[0005] The folding mechanism of the embodiment of the present application attaches the door plate to the flexible screen, so that the flexible screen can be folded or unfolded when the door plate rotates, and the reverse arching of the flexible screen is avoided. The tracks are arranged on the door plate, the door plate is connected to the fixed intermediate plate through the connecting rod, when the user folds or unfolds the electronic device, the pin of the connecting rod slides in the track of the door plate, the rotation speed of the door plate can be controlled, and the door plate and the intermediate plate can provide sufficient accommodation space for the flexible screen, while the flexible screen is prevented from being pulled

[0006] In a possible implementation manner of the first aspect, the connecting rod group further comprises a third connecting rod, one end of the third connecting rod is movably connected to a third end of the intermediate plate, the other end of the third connecting rod is provided with a third pin, and the third pin slides in the track on a second plane of the first door plate.

[0007] In a possible implementation manner of the first aspect, the connecting rod group further comprises a fourth connecting rod, one end of the fourth connecting rod is movably connected to a fourth end of the intermediate plate, the other end of the fourth connecting rod is provided with a fourth pin, and the fourth pin slides in the track on a second plane of the second door plate.

[0008] The folding mechanism of the embodiment of the present application has at least two connecting rods, and can also have three connecting rods or four connecting rods, and at most two connecting rods are arranged on one side of the electronic device, and one connecting rod is used to connect one door plate and the intermediate plate.

[0009] In a possible implementation manner of the first aspect, one end of the first door plate is movably connected to the middle frame, and one end of the second door plate is movably connected to the middle frame, which comprises: one end of the first door plate is engagedly connected to the middle frame, and the first door plate can rotate around the engagement; and one end of the second door plate is engagedly connected to the middle frame, and the second door plate can rotate around the engagement.

[0010] In a possible implementation manner of the first aspect, a distance between a plane where an axis of rotation of the first door plate is located and a plane where the flexible screen is located is less than a first threshold value, and a distance between a plane where an axis of rotation of the second door plate is located and the plane where the flexible screen is located is less than the first threshold value.

[0011] The folding mechanism of the embodiment of the present application sets the rotation axis of the door plate near the plane where the flexible screen is located, so that the flexible screen is not pulled when the door plate rotates, and the flexible screen can be attached to the middle frame.

[0012] In a possible implementation manner of the first aspect, one end of the first connecting rod is movably connected to the first end of the intermediate plate, and one end of the second connecting rod is movably connected to the second end of the intermediate plate, including: the one end of the first connecting rod is connected to the first end of the intermediate plate by a bolt or a buckle or a rivet; and the one end of the second connecting rod is connected to the second end of the intermediate plate by the bolt or the buckle or the rivet.

[0013] In a second aspect, an electronic device is provided, including a flexible screen and the folding mechanism of the first aspect or any possible implementation manner of the first aspect, the flexible screen being bent under the action of the folding mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a flexible screen folding process schematic diagram of the present application;

[0015] Figure 2 is a schematic diagram of a foldable electronic device of the present application;

[0016] Figure 3 is a schematic diagram of an electronic device in an unfolded state of the present application;

[0017] Figure 4 is a schematic diagram of an electronic device in a folded state of the present application;

[0018] Figure 5 is a schematic diagram of another folded state of an electronic device of the present application;

[0019] Figure 6 is a schematic diagram of the present application in which the door plate avoids being pulled by the flexible screen due to too fast folding;

[0020] Figure 7 is a schematic diagram of the present application in which the door plate and the flexible screen are not attached, causing the flexible screen to be reversely arched;

[0021] Figure 8 is a schematic diagram of the present application in which the door plate and the flexible screen are attached, causing the flexible screen to be normally bent;

[0022] Figure 9 is a schematic diagram of the present application in which the flexible screen is long-term folded and then unfolded to be M-shaped arched;

[0023] Figure 10 is a schematic diagram of the flexible screen bending part of the present application being flattened under the force of the door plate;

[0024] Figure 11 is a schematic diagram of the position of the folding mechanism of the present application on the electronic device;

[0025] Figure 12 is a schematic structural diagram of the folding mechanism of the present application;

[0026] Figure 13 is a structural diagram of part of the folding mechanism of the present application;

[0027] Figure 14 is a schematic diagram of the door plate rotating axis being away from the plane of the flexible screen of the present application;

[0028] Figure 15 is a schematic diagram of the door plate rotating axis being close to the plane of the flexible screen of the present application;

[0029] Figure 16 is a schematic structural diagram of a folding mechanism of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the present application will be described below in conjunction with the accompanying drawings.

[0031] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it should be understood that the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" and "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "side", "inner", "outer", "horizontal", "vertical" and the like indicate the orientation or positional relationship based on the installation, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] The foldable electronic device provided by the embodiments of the present application can be any device with communication and / or storage functions, for example, it can be a mobile phone, a tablet computer, a watch, an e-reader, a notebook computer, a vehicle-mounted device, a network television, a wearable device, etc.

[0036] Figure 2 is a schematic diagram of a foldable electronic device provided by the embodiments of the present application. As an example but not limitation, in the present embodiment, the electronic device 100 is a mobile phone. As shown in Figure 2 , the electronic device 100 includes a housing 110 and a folding screen 120, and the folding screen 120 is mounted on the housing 110. The electronic device 100 further includes electronic elements (not shown in the figure) arranged inside the housing 100, which include a circuit board, a processor, a camera, a sensor, a microphone, a battery, etc., but are not limited thereto.

[0037] In the embodiments of the present application, the electronic device 100 has a foldable characteristic, and the housing 110 of the electronic device 100 is composed of two parts that can be flipped relative to each other, for example, Figure 2 , the first housing 111 and the second housing 112. The first housing 111 and the second housing 112 can be connected through a rotating mechanism (not shown in the figure) arranged at the bending part C, so that the first housing 111 can be flipped relative to the second housing 112. Wherein, the rotating mechanism can be a folding mechanism provided by the embodiments of the present application.

[0038] In Figure 2 , the electronic device 100 can be folded with the bending part C as the axis. Specifically, in Figure 2In the second case, the first housing 111 can move in a direction towards the second housing 112 or in a direction away from the second housing 112 with the bending position C as the reference point. For example, the first housing 111 can be folded towards the second housing 112, so that the included angle a between the first housing 111 and the second housing 112 gradually decreases. For another example, the first housing 111 can be unfolded away from the second housing 112, so that the included angle between the first housing 111 and the second housing 112 gradually increases.

[0039] According to different folding angles, the electronic device 100 can be in different use states, Figure 3 is a schematic diagram of the electronic device 100 in an unfolded state (at this time, the included angle a is 180 degrees), Figure 4 is a schematic diagram of an example of the electronic device 100 in a folded state. The user can set the electronic device 100 in different states according to the use demand. For example, when a large-screen display is needed, the electronic device 100 can be set in an unfolded state as shown in Figure 3 to improve the user's experience. When it is needed to be conveniently carried, the electronic device 100 can be set in a folded state as shown in Figure 4 .

[0040] It should be understood that in the present embodiment, in addition to the unfolded state in Figure 3 and the folded state in Figure 2 , 4 , the electronic device 100 can also be in other states, for example, in a state between the unfolded state in Figure 3 and the folded state in Figure 4 (that is, at this time, the electronic device 100 can be bent at a certain angle but has not reached the folded state in Figure 4 ), which is not limited by the present application.

[0041] The folding screen or flexible screen is currently attracting much attention due to its unique characteristics and great potential. Compared with the traditional screen, the flexible screen has the characteristics of strong flexibility and bendability, can provide a new interaction mode based on the bendable characteristics for the user, and can meet more demands of the user for the electronic device. However, due to the limitations of the screen itself or the rotating mechanism, the flexible screen may have some problems in the folding process or after repeated folding.

[0042] Figures 5 to 10 is a schematic diagram showing some problems existing in the current flexible screen.

[0043] Figure 5 is a schematic diagram showing that the flexible screen is reversely arched due to slow avoidance of the door plate. As shown in Figure 5As shown, the structure of the flexible screen can include the flexible screen itself, glue, a middle frame, a door plate, and an intermediate plate, etc., wherein the glue is used to connect the middle frame, the door plate, and the flexible screen, and can be any existing glue for bonding terminal device components, such as liquid optical transparent glue or hot melt glue; the middle frame is the frame of the terminal device and plays a protective and supporting role; one end of the door plate is connected with the middle frame and can rotate around the middle frame; the intermediate plate is fixed below the bendable part of the flexible screen. Figure 5 When the flexible screen is rotated from unfolding to folding, if the door plate avoids too slowly and cannot provide enough avoiding space to accommodate the bent flexible screen, the flexible screen is caused to arch reversely. Figure 6 A schematic diagram showing that the door plate pulls the flexible screen due to too fast avoiding is shown. As shown in FIG. 6, when the door plate avoids too fast, the flexible screen is pulled by the door plate before reasonable bending is automatically performed, causing the flexible screen to be deformed by being pulled. Figure 6 As shown, when the door plate avoids too fast, the flexible screen is pulled by the door plate before reasonable bending is automatically performed, causing the flexible screen to be deformed by being pulled.

[0044] When the flexible screen is rotated from unfolding to folding, under the condition of enough avoiding space, a force is needed to make the flexible screen bend downward reasonably to avoid arching reversely upward. Figure 7 A schematic diagram showing that the door plate and the flexible screen do not fit to cause the flexible screen to arch reversely is shown. Since there is no glue connection between the door plate and the flexible screen, when the flexible screen is bent, no force acts on the flexible screen to make it bend downward, so the flexible screen may inevitably arch upward. Figure 8 A schematic diagram showing that the door plate and the flexible screen fit to make the flexible screen bend normally is shown. Since there is glue connection between the door plate and the flexible screen, when the flexible screen is rotated from unfolding to folding, the door plate moves downward, dragging the flexible screen to move downward as well, so that the flexible screen can automatically bend reasonably.

[0045] In addition, when the door plate and the flexible screen do not fit, if the flexible screen is in a folded state for a long time, the flexible screen will be deformed, and when it is unfolded again, the bent part of the flexible screen will become M-shaped, Figure 9 A schematic diagram showing that when the door plate and the flexible screen do not fit, the flexible screen is unfolded after being folded for a long time and arches reversely in an M shape. At this time, a force is needed to unfold the flexible screen, Figure 10 A schematic diagram showing that when the door plate and the flexible screen are connected by glue and fit, when the flexible screen is unfolded, the bent part of the flexible screen is unfolded under the action of the force of the door plate.

[0046] Therefore, the embodiment of the present application provides a flexible screen protection device which can play a protective role in the bending process of the flexible screen and prolong the service life of the flexible screen.

[0047] To better illustrate the position of the folding mechanism of the embodiment of the present application on the electronic device, Figure 11A schematic diagram showing the position of the folding mechanism of the embodiment of the present application on the electronic device is shown. The electronic device shown in 11 is a foldable electronic device, including a foldable flexible screen, which can be folded inward. The electronic device includes a middle frame, i.e. the frame of the electronic device. At the bottom edge of the electronic device, the door plate of the folding mechanism is shown, which penetrates the electronic device and is movably connected with the middle frame, and the folding mechanism can include two identical door plates. At the bottom edge of the electronic device, the middle plate of the folding mechanism is also shown, which also penetrates the electronic device. When the electronic device is folded inward, the two door plates and the middle plate can form a triangular space in Figure 9 and Figure 10 , so that the flexible screen is accommodated in the triangular space in a water drop shape.

[0048] It should be understood that the arrangement of the folding mechanism on the other edge of the electronic device, which is not shown, is the same as the arrangement shown on the bottom edge.

[0049] It should also be understood that Figure 11 only one position arrangement of the folding mechanism of the embodiment of the present application on the electronic device is shown exemplarily, so as to facilitate the understanding of the folding mechanism of the embodiment of the present application, but does not constitute a limitation on the present application.

[0050] Figure 12 a schematic structural diagram of the folding mechanism of the embodiment of the present application is shown, Figure 12 taking the structural distribution of the folding mechanism on one of the bottom edges of the electronic device as an example, for example Figure 11 the lower bottom edge of the electronic device in

[0051] As shown in Figure 12 , the folding mechanism of the embodiment of the present application includes a middle frame, which is attached to the flexible screen by an adhesive.

[0052] The folding mechanism further includes a door plate set, wherein the door plate set includes two door plates, which can be respectively denoted as a first door plate and a second door plate. Both of the two door plates are arranged on the lower surface of the flexible screen, it should be understood that the lower surface of the flexible screen is the surface of the flexible screen facing the inside of the electronic device, and the two door plates are symmetrically arranged on both sides of the folding area of the flexible screen and are attached to the lower surface of the flexible screen by an adhesive. One end of the first door plate is movably connected with the end of the middle frame on the left side of the folding area of the flexible screen, and one end of the second door plate is movably connected with the end of the middle frame on the right side of the folding area of the flexible screen, so that the first door plate and the second door plate can rotate around the connection, and since the first door plate and the second door plate are attached to the flexible screen, the first door plate and the second door plate can drive the flexible screen to move together when they rotate, avoiding the reverse arching of the flexible screen. Figure 13 a partial detail structural diagram of the folding mechanism of the embodiment of the present application is shown, as Figure 13As shown, the first door plate and the second door plate are each provided with a track on a surface parallel to the electronic device, and a corresponding track can also be provided on the other side of the surface parallel to the electronic device.

[0053] The folding mechanism further comprises an intermediate plate fixed in a region of the lower surface of the flexible screen folding region, but not attached to the flexible screen. The central axis of the intermediate plate can be on the same vertical plane as the central axis of the flexible screen folding region.

[0054] The folding mechanism further comprises a linkage group comprising at least two links, respectively referred to as a first link and a second link. One end of the first link is movably connected to a first end of the intermediate plate, and the other end of the first link is provided with a pin that can slide in the track of the first door plate. One end of the second link is movably connected to a second end of the intermediate plate, and the other end of the second link is provided with a pin that can slide in the track of the second door plate. The first link and the second link can both be provided on the same bottom edge of the electronic device, or the first link can be provided on the upper bottom edge of the electronic device and the second link can be provided on the lower bottom edge of the electronic device. It should be understood that the track of the track can be designed according to actual needs, and the track of the track can change the rotation speed of the door plate.

[0055] The linkage group can further comprise a third link, wherein the first link and the second link are provided on the lower bottom edge of the electronic device, and the third link is provided on the upper bottom edge of the electronic device. The third link is movably connected to a third end of the intermediate plate, and the other end of the third link is provided with a pin that can slide in the track on the surface parallel to the upper bottom edge of the first door plate.

[0056] The linkage group can further comprise a fourth link, wherein the first link and the second link are provided on the lower bottom edge of the electronic device, and the third link and the fourth link are provided on the upper bottom edge of the electronic device. The fourth link is movably connected to a fourth end of the intermediate plate, and the other end of the fourth link is provided with a pin that can slide in the track on the surface parallel to the upper bottom edge of the second door plate.

[0057] Optionally, one end of the first door plate is movably connected to the end of the middle frame on the left side of the flexible screen folding region as a snap connection, and one end of the second door plate is movably connected to the end of the middle frame on the right side of the flexible screen folding region as a snap connection, and the first door plate and the second door plate can rotate around the snap connection, respectively.

[0058] Optionally, the distance between the plane in which the axis of rotation of the first door plate is located and the plane in which the flexible screen is located is less than a certain threshold value, and the distance between the plane in which the axis of rotation of the second door plate is located and the plane in which the flexible screen is located is less than a certain threshold value. Figure 14 A schematic view showing that the axis of rotation of the door plate is away from the plane in which the flexible screen is located is shown as Figure 14As shown, when the door plate rotation axis is far away from the plane where the flexible screen is located, the flexible screen will be pulled to move rightward when the door plate rotates due to the adhesion with the flexible screen, which will cause the flexible screen to be separated from the middle frame, and the electronic device will be damaged. Figure 15 As shown, the door plate rotation axis is close to the plane where the flexible screen is located. Figure 15 As shown, when the door plate rotation axis is close to the plane where the flexible screen is located, for example, the door plate rotation axis is arranged on the neutral layer of the flexible screen, so that the flexible screen will not be pulled when the door plate rotates, and the flexible screen can be adhered to the middle frame.

[0059] It should be understood that the first end of the first connecting rod is movably connected with the first end of the middle plate, the first end of the second connecting rod is movably connected with the second end of the middle plate, the third end of the third connecting rod is movably connected with the third end of the middle plate, and the fourth end of the fourth connecting rod is movably connected with the fourth end of the middle plate, which means that two connecting rods are movably connected with the middle plate at two ends of the lower surface of the electronic device, and the other two connecting rods are movably connected with the middle plate at two ends of the upper surface of the electronic device. The movable connection can be connected by any one of a bolt, a buckle or a rivet, so that the connecting rod can rotate around the connection with the middle plate.

[0060] According to the folding mechanism of the embodiment of the present application, the door plate is adhered to the flexible screen, so that the door plate can drive the flexible screen to fold or unfold when the door plate rotates, and the reverse arching of the flexible screen is avoided. The track is arranged on the door plate, the door plate is connected with the fixed middle plate through the connecting rod, when the user folds or unfolds the electronic device, the pin of the connecting rod slides in the track of the door plate, the door plate can be controlled to rotate at a proper speed, so that the door plate and the middle plate can provide sufficient accommodation space for the flexible screen, and the flexible screen is avoided to be pulled. The rotation axis of the door plate is arranged close to the plane where the flexible screen is located, so that the flexible screen will not be pulled when the door plate rotates, and the flexible screen can be adhered to the middle frame.

[0061] Figure 16 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in Figures 2 to 4 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in Figure 11 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in Figure 16 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in Figure 16 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in Figure 16 As shown, the folding mechanism of the embodiment of the present application can be applied to the bending part C in

[0062] The middle frame in the folding mechanism is the frame of the electronic device, which can be made of metal, glass, ceramic, polymer or composite material, and the middle frame is adhered to the screen by an adhesive.

[0063] The folding mechanism includes two door plates arranged on both sides of the middle plate with the middle plate as the shaft. Take one of the door plates as an example. One end of the door plate is movably connected with the middle frame, i.e. the door plate can rotate around the connection with the middle frame. The door plate is also adhered to the screen by an adhesive. The door plate is provided with a track, which can be parallel to the direction of the middle frame.

[0064] The folding mechanism also includes a connecting rod, one end of the connecting rod is provided with a pin, the pin can slide in the track on the door plate. The other end of the connecting rod is connected with the middle plate by a bolt, wherein the middle plate is fixed in the electronic device. Figure 16 Two connecting rods are shown in the middle, i.e. two connecting rods are included in the bottom edge of the electronic device, and each connecting rod connects one of the door plates with the middle plate. It should be understood that two connecting rods are also included in the top edge of the electronic device, and each connecting rod connects one of the door plates with the middle plate. Therefore, Figure 16 The folding mechanism shown includes four connecting rods.

[0065] According to the folding mechanism shown, Figure 16 When the electronic device is folded, the pin on the connecting rod slides in the track on the door plate, and the other end of the connecting rod is connected with the fixed middle plate, so that the rotation of the door plate can be controlled at a proper speed. The door plate is adhered to the flexible screen, and the rotation of the door plate drives the flexible screen to bend at a proper speed, avoiding the situation that the flexible screen is reversed and arched due to the too fast rotation of the door plate, or the flexible screen is stretched and deformed due to the too slow rotation of the door plate.

[0066] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A folding mechanism applied to a foldable electronic device, characterized in that, The folding mechanism comprises: a middle frame, which is attached to the flexible screen by an adhesive; a door plate group, which comprises a first door plate and a second door plate, the first door plate and the second door plate are arranged on the lower surface side of the flexible screen and symmetrically arranged on both sides of the folding area of the flexible screen, the first door plate and the second door plate are attached to the flexible screen by an adhesive, one end of the first door plate is movably connected to the middle frame, one end of the second door plate is movably connected to the middle frame, the first door plate and the second door plate are provided with tracks on the plane parallel to the middle frame; wherein one end of the first door plate is movably connected to the middle frame, one end of the second door plate is movably connected to the middle frame, comprising: one end of the first door plate is engagedly connected to the middle frame, the first door plate can rotate around the engagement, one end of the second door plate is engagedly connected to the middle frame, the second door plate can rotate around the engagement; the distance between the plane where the axis of rotation of the first door plate is located and the plane where the flexible screen is located is less than a first threshold value, and the distance between the plane where the axis of rotation of the second door plate is located and the plane where the flexible screen is located is less than a first threshold value; an intermediate plate, which is fixed on the lower surface side of the folding area of the flexible screen; a linkage group, which comprises a first linkage and a second linkage, one end of the first linkage is movably connected to the first end of the intermediate plate, the other end of the first linkage is provided with a first pin, the first pin slides in the track on the first surface of the first door plate, one end of the second linkage is movably connected to the second end of the intermediate plate, the other end of the second linkage is provided with a second pin, the second pin slides in the track on the first surface of the second door plate.

2. The folding mechanism of claim 1, wherein, The linkage group further comprises a third linkage, one end of the third linkage is movably connected to the third end of the intermediate plate, the other end of the third linkage is provided with a third pin, the third pin slides in the track on the second surface of the first door plate.

3. The folding mechanism of claim 2, wherein, The linkage group further comprises a fourth linkage, one end of the fourth linkage is movably connected to the fourth end of the intermediate plate, the other end of the fourth linkage is provided with a fourth pin, the fourth pin slides in the track on the second surface of the second door plate.

4. The folding mechanism according to any one of claims 1 to 3, characterized in that one end of the first linkage is movably connected to the first end of the intermediate plate, one end of the second linkage is movably connected to the second end of the intermediate plate, comprising: one end of the first linkage is connected to the first end of the intermediate plate by a bolt or a buckle or a rivet; one end of the second linkage is connected to the second end of the intermediate plate by a bolt or a buckle or a rivet.

5. An electronic device, comprising: The electronic device comprises a flexible screen and a folding mechanism as claimed in any one of claims 1 to 4, the flexible screen is bent under the action of the folding mechanism.

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