CN112751960A

CN112751960A - Folding mechanism and electronic equipment

Info

Publication number: CN112751960A
Application number: CN202011627612.5A
Authority: CN
Inventors: 任旭锋
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-04
Anticipated expiration: 2040-12-30
Also published as: CN112751960B; WO2022143487A1

Abstract

The application discloses a folding mechanism and electronic equipment, which belong to the field of communication equipment, wherein the folding mechanism comprises a first folding page, a second folding page, a first linkage component, a second linkage component, a first movable cover, a second movable cover and a rotating shaft, wherein the first linkage component and the second linkage component are rotatably connected through the rotating shaft; in fold condition, first folding page or leaf and second folding page or leaf superpose, at the in-process that folding mechanism switched to fold condition from the expansion state, first linkage subassembly drives first removal lid and removes towards first folding page or leaf, and the second linkage subassembly drives the second and removes the lid and remove towards the second folding page or leaf. The electronic equipment adopting the folding mechanism can solve the problem of considering both larger display area and higher portability.

Description

Folding mechanism and electronic equipment

Technical Field

The application relates to the technical field of communication equipment, in particular to a folding mechanism and electronic equipment.

Background

With the progress of science and technology, electronic devices can provide more and more services and convenience for people, and the demand of people for electronic devices with larger display areas is gradually increased. However, as the display area of the electronic device increases, the portability of the electronic device may be reduced to some extent, which is not favorable for improving the user experience.

Disclosure of Invention

The application discloses folding mechanism and electronic equipment can solve the problem that present electronic equipment can not compromise between increase display area and promotion portability.

In order to solve the above problem, the embodiments of the present application are implemented as follows:

in a first aspect, an embodiment of the present application provides a folding mechanism, including:

a first folded page;

the second folding page is positioned on one side of the first folding page, the second folding page is connected with the first folding page through a rotating shaft assembly, the first folding page and the second folding page can rotate around the rotating shaft assembly respectively so that the first folding page and the second folding page can be switched between an unfolding state and a folding state, and in the unfolding state, the first folding page and the second folding page are coplanar; in the folded state, the first folded sheet and the second folded sheet are overlapped;

the first movable cover is connected with the first folding page through a first linkage assembly;

the second movable cover is connected with the second folding page through a second linkage assembly;

the first linkage assembly and the second linkage assembly are rotatably connected through the rotating shaft;

folding mechanism certainly the expansion state to the in-process that fold condition switched, first linkage subassembly drives first removal lid orientation first folding page or leaf removes, just second linkage subassembly drives second removal lid orientation the second folding page or leaf removes.

In a second aspect, an embodiment of the present application provides an electronic device, which includes a display screen and the above-mentioned folding mechanism, where the display screen is supported by the folding mechanism, and the display screen is located on a side of the first folding page departing from the first movable cover.

The utility model discloses a folding mechanism can be applied to among the electronic equipment, makes electronic equipment have folding and expand two kinds of states, and electronic equipment is in under the condition of expansion state, and its display area is great relatively, and electronic equipment can promote the portability to a certain extent under the condition of fold condition to make electronic equipment can compromise great display area and better portability.

The folding mechanism comprises a first folding page, a second folding page, a first movable cover, a second movable cover, a first linkage assembly, a second linkage assembly and a rotating shaft, wherein the first folding page and the second folding page are rotatably connected through a rotating shaft assembly, the first movable cover is connected with the first folding page through the first linkage assembly, the second movable cover is connected with the second folding page through the second linkage assembly, and the first linkage assembly and the second linkage assembly are connected through the rotating shaft to form the folding mechanism. In the process that the folding mechanism is switched from the unfolding state to the folding state, the first linkage assembly can drive the first movable cover to move towards the first folding page, and the second linkage assembly can drive the second movable cover to move towards the second folding page, so that the first movable cover and the second movable cover are separated from each other, and the folding process of the folding mechanism can be normally carried out.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a portion of a folding mechanism including a first moveable cover according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of portion I of FIG. 1;

FIG. 3 is a schematic structural diagram of a hinge assembly in the folding mechanism disclosed in the embodiments of the present application;

FIG. 4 is an exploded view of a hinge assembly of the folding mechanism disclosed in the embodiments of the present application;

FIG. 5 is an enlarged schematic view of a portion of a hinge assembly in the folding mechanism disclosed in the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a shaft connecting block of a rotating shaft assembly in the folding mechanism disclosed in the embodiment of the present application;

FIG. 7 is an assembly view of a hinge assembly of the folding mechanism disclosed in the embodiments of the present application;

FIG. 8 is a schematic diagram of a portion of a folding mechanism including a mounting portion according to an embodiment of the present disclosure;

FIG. 9 is an enlarged view of detail II of FIG. 8;

FIG. 10 is a schematic diagram of a portion of a folding mechanism including a slider assembly according to an embodiment of the present disclosure;

FIG. 11 is a schematic view of a portion of a folding mechanism including a slide assembly and a mounting portion according to an embodiment of the present disclosure;

FIG. 12 is an assembly view of the structure shown in FIG. 11 with the first and second folded pages;

FIG. 13 is an enlarged view of portion III of FIG. 12;

FIG. 14 is an assembly view of a first folded page and a first moveable cover of the folding mechanism disclosed in an embodiment of the present application;

FIG. 15 is an enlarged view of a portion IV of FIG. 14;

FIG. 16 is an assembly view of a first folded page and a first moveable cover of the folding mechanism disclosed in an embodiment of the present application;

FIG. 17 is an enlarged view of portion V of FIG. 16;

FIG. 18 is a schematic structural view of a folding mechanism disclosed in an embodiment of the present application in an unfolded state;

FIG. 19 is a schematic structural view of a folding mechanism disclosed in an embodiment of the present application in a folded state;

FIG. 20 is an exploded view of an electronic device disclosed in an embodiment of the present application;

fig. 21 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application.

Description of reference numerals:

110 a-first movable cover, 110 b-second movable cover, 120-slide block, 130-shell,

200-a rotating shaft,

300 a-a first linkage component, 300 b-a second linkage component, 310-a connecting block, 311-a connecting body, 312-a limit boss, 313-a limit hole, 314-a clamping part, 320-a first rack, 330-a second rack, 340-a first gear, 350-a second gear, 360-a wheel shaft,

410 a-a first folding page, 410 b-a second folding page, 411-a sliding chute, 412-a bearing part, 413-a first side wall, 414-a second side wall, 415-a third side wall, 416-a matching part, 420-a first limiting block, 430-a second limiting block, 440-a supporting platform,

500-sliding component, 510-sliding part, 511-sliding body, 512-first pin, 513-second pin, 521-first rotating part, 522-second rotating part, 530-elastic resetting piece,

600-rotating shaft seat, 610-rotating shaft hole,

710-main beam, 720-first limit part, 721-blind hole, 730-support part, 731-through hole, 740-second limit part, 750-bridging part,

800-rotating shaft assembly, 810-supporting strip, 811-first accommodating groove, 811 a-first groove wall, 812-second accommodating groove, 812 a-fourth groove wall, 820-connecting seat, 821-positioning hole, 830-shaft connecting block, 831-block body, 832-third connecting shaft, 840-plug, 841-first blocking part, 842-second blocking part, 843-fixing part, 850-first connecting shaft, 860-second connecting shaft,

900-display screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 21, an embodiment of the present application discloses a folding mechanism, which includes a first folding sheet 410a, a second folding sheet 410b, a first movable cover 110a, a second movable cover 110b, a first linkage assembly 300a, a second linkage assembly 300b, and a rotation shaft 200. The folding mechanism may be used in an electronic device to provide folding functionality, and the electronic device may generally include a display screen 900.

The first folding sheet 410a and the second folding sheet 410b are main structures of a folding mechanism, and both the first folding sheet 410a and the second folding sheet 410b can provide a supporting function, specifically, support the display screen 900 in the electronic device.

Generally, in a foldable electronic device, as the folding and unfolding operations of the electronic device progress, the opposite sides of the electronic device have different lengths, so that it is necessary to solve the problem of different lengths of the inner side and the outer side in the process of designing the electronic device, and for the folding mode of the electronic device, the solution of the folding mechanism is different when the electronic device adopts different folding modes of folding the screen inward or folding the screen outward. As described above, in the folding mechanism disclosed in the embodiment of the present application, the first folding sheet 410a and the second folding sheet 410b can support the screen, and in order to reduce the folding range of the flexible screen as much as possible, the folding mechanism provided in the present application can be folded in a manner of folding the screen outward, that is, when the folding mechanism is in the folding state, the flexible screen is located outside the folding mechanism.

The first movable cover 110a and the second movable cover 110b are one of specific mechanisms of the folding mechanism for solving the problem of unequal length between the inside and the outside, and the folding mechanism can be normally switched between the folded state and the unfolded state by changing the relative positions of the first movable cover 110a and the first folded sheet 410a and the relative positions of the second movable cover 110b and the second folded sheet 410b during the mutual switching between the folded state and the unfolded state of the folding mechanism.

Alternatively, in the folding mechanism, the specific structures of the first folding sheet 410a and the second folding sheet 410b may be determined according to actual conditions, and the specific structures, sizes, and other parameters may be different, in order to make the folding mechanism and the electronic device including the folding mechanism more aligned, and make the size of the electronic device in the folded state relatively smaller, the shapes and sizes of the first folding sheet 410a and the second folding sheet 410b may be correspondingly the same, and the two sheets may be symmetrically arranged. Based on this, the shape and size of the first movable cover 110a and the second movable cover 110b are also the same, and the first movable cover 110a and the second movable cover 110b are symmetrically arranged, and the plane where the axis of the rotating shaft 200 in the folding mechanism is located is the symmetrical plane of the two. In addition, the first movable cover 110a is connected to the first folded sheet 410a by the first interlocking unit 300a, and the second movable cover 110b is connected to the second folded sheet 410b by the second interlocking unit 300b, and when the first folded sheet 410a and the second folded sheet 410b have the same structure and the first movable cover 110a and the second movable cover 110b have the same structure, the first interlocking unit 300a and the second interlocking unit 300b may have the same structure.

The second folded page 410b is located at one side of the first folded page 410a, the second folded page 410b and the first folded page 410a are connected by a rotating shaft assembly 800, and the rotating shaft assembly 800 may be a hinge structure or a shaft structure, so that the first folded page 410a and the second folded page 410b can rotate relative to each other through the rotating shaft assembly 800, and in detail, the first folded page 410a and the second folded page 410b can rotate around the rotating shaft assembly 800, respectively, so that the first folded page 410a and the second folded page 410b can be switched between an unfolded state and a folded state, and in the unfolded state, the first folded page 410a and the second folded page 410b are coplanar, and in particular, a supporting surface for supporting the display screen 900 in the first folded page 410a and a supporting surface for supporting the display screen 900 in the second folded page 410b are coplanar, so that the display surfaces of the display screen 900 are located in the same plane. In the folded state, the first folded page 410a and the second folded page 410b are overlapped, which is specifically embodied in that the first folded page 410a and the second folded page 410b are arranged in a stacked manner, the supporting surface of the first folded page 410a is opposite to the supporting surface of the second folded page 410b, and both the supporting surfaces are exposed.

The first linkage assembly 300a and the second linkage assembly 300b are rotatably connected through a rotating shaft 200, the rotating shaft 200 may be a long straight bar-shaped cylindrical rod, and both the first linkage assembly 300a and the second linkage assembly 300b may be hinged to the rotating shaft 200, so that both the first linkage assembly 300a and the second linkage assembly 300b can rotate relative to the rotating shaft 200, and the first linkage assembly 300a and the second linkage assembly 300b may be connected into a whole, so that the first movable cover 110a and the second movable cover 110b can be assembled and connected with the first folding sheet 410a and the second folding sheet 410 b. Wherein the rotation axis of the rotation shaft 200 and the rotation axis of the rotation shaft assembly 800 are located in the same plane, and the plane is perpendicular to the support surface of the first folded sheet 410a in the unfolded state.

The first linkage assembly 300a and the second linkage assembly 300b have the same function, and the first linkage assembly 300a can enable the first movable cover 110a and the first folded page 410a to generate relative movement in the relative rotation process of the first folded page 410a and the second folded page 410b, correspondingly, the second linkage assembly 300b can drive the second movable cover 110b and the second folded page 410b to move relatively along with the relative rotation of the first folded page 410a and the second folded page 410b, and further enable the first movable cover 110a and the second movable cover 110b to be mutually butted under the condition that the folding mechanism is in an unfolded state so as to shield other structures between the first movable cover 110a and the first folded page 410a and between the second movable cover 110b and the second folded page 410b and prevent foreign matters such as external dust from entering the folding mechanism; correspondingly, in the case that the folding mechanism is in the folded state, since the first and second moving covers 110a and 110b are located at the inner sides, in order to ensure that the folding mechanism can be normally switched from the unfolded state to the folded state, the first and second moving covers 110a and 110b need to be separated from each other, so that the overall length of the inner sides needs to be reduced.

Based on the above, during the process of switching the folding mechanism from the unfolded state to the folded state, the first linkage assembly 300a drives the first movable cover 110a to move towards the first folding sheet 410a, and the second linkage assembly 300b drives the second movable cover 110b to move towards the second folding sheet 410 b. Alternatively, the first linkage assembly 300a and the second linkage assembly 300b are linear motors, and the first linkage assembly 300a and the second linkage assembly 300b may respectively drive the first moving cover 110a and the second moving cover 110b to move during the switching state of the folding mechanism.

In detail, the first moving cover 110a moves to a side of the first folding sheet 410a opposite to the rotation shaft assembly 800. More intuitively, taking the rotational axis direction of the rotating shaft assembly 800 as the width direction of the folding mechanism as an example, the direction perpendicular to the first folded sheet 410a is the thickness direction of the folding mechanism, and the directions perpendicular to the width direction and the thickness direction are the length directions of the folding mechanism, and the length directions are also perpendicular to the axial direction of the rotating shaft 200, in the above-mentioned technical solution, in the folding mechanism of the unfolding turntable, the first movable cover 110a and the second movable cover 110b are distributed along the length directions, and in the process of switching the folding mechanism to the folded state, the first movable cover 110a moves along the length directions in the direction away from the second movable cover 110b, of course, since the relative positions of the first movable cover 110a and the second movable cover 110b are always changed in the above-mentioned process, the case of only beginning to switch the folded state of the folding mechanism is exemplified, the specific movement of the first movable cover 110a is more intuitively explained, and the technical solution is not strictly limited.

Alternatively, the first folding page 410a includes a side wall, and correspondingly, the second folding page 410b may also include a similar side wall, which are opposite to each other along the length direction of the folding mechanism in the unfolded state of the folding mechanism, and the rotating shaft 200, the first movable cover 110a, the second movable cover 110b and the rotating shaft assembly 800 are located between the two side walls along the length direction. More specifically, the above-mentioned sidewall of the first folded sheet 410a may be a third sidewall 415 mentioned below.

Based on the above, in the process of switching the folding mechanism from the unfolded state to the folded state, the first linking component 300a drives the first movable cover 110a to move towards the first folded page 410a, and this technical solution can also be understood as the first linking component 300a drives the first movable cover 110a to move towards the direction close to the aforementioned side wall of the first folded page 410 a. Correspondingly, the second linkage assembly 300b drives the second movable cover 110b to move toward the second folded page 410b, and the second linkage assembly 300b drives the second movable cover 110b to move toward the side wall of the second folded page 410 b.

The folding mechanism comprises a first folding page 410a, a second folding page 410b, a first movable cover 110a, a second movable cover 110b, a first linkage assembly 300a, a second linkage assembly 300b and a rotating shaft 200, wherein the first folding page 410a and the second folding page 410b are rotatably connected through the rotating shaft assembly 800, the first movable cover 110a is connected with the first folding page 410a through the first linkage assembly 300a, the second movable cover 110b is connected with the second folding page 410b through the second linkage assembly 300b, and the first linkage assembly 300a and the second linkage assembly 300b are connected through the rotating shaft 200 to form the folding mechanism. In the process of switching the folding mechanism from the unfolding state to the folding state, the first linkage component 300a can drive the first movable cover 110a to move towards the first folding sheet 410a, and the second linkage component 300b can drive the second movable cover 110b to move towards the second folding sheet 410b, so that the first movable cover 110a and the second movable cover 110b are separated from each other, and the folding process of the folding mechanism can be normally performed.

In addition, in the process of switching the folding mechanism from the folded state to the unfolded state provided in the above embodiment, the first linkage assembly 300a drives the first movable cover 110a to move away from the first folding sheet 410a, and the second linkage assembly 300b drives the second movable cover 110b to move away from the second folding sheet 410b, so that the first movable cover 110a and the second movable cover 110b gradually approach each other, and when the folding mechanism is in the unfolded state, the first movable cover 110a and the second movable cover 110b can be butted with each other.

More intuitively, in the case where the first and second folded

pages

410a and 410b include the above-mentioned side wall, it is considered that the first linkage assembly 300a drives the first movable cover 110a to move away from the side wall of the first folded page 410a, and the second linkage assembly 300b drives the second movable cover 110b to move away from the side wall of the second folded page 410b, so that the first movable cover 110a and the second movable cover 110b can approach each other and finally butt together.

Optionally, the first linkage assembly includes a connecting block 310, a first rack 320, a second rack 330, a first gear 340, and a second gear 350.

The connection block 310 is movably disposed between the first folded sheet 410a and the first movable cover 110a, that is, the first folded sheet 410a and the first movable cover 110a are disposed opposite to each other, the connection block 310 is interposed therebetween, and the connection block 310 can move relative to the first folded sheet 410a and the first movable cover 110 a. Meanwhile, the connection block 310 is rotatably connected to the rotation shaft 200. In detail, the connecting block 310 may be sleeved outside the rotating shaft 200, which may ensure that the connection relationship and the rotation matching relationship between the connecting block 310 and the rotating shaft 200 are relatively good.

The first rack 320 is connected to the connecting block 310, the second rack 330 is connected to the first movable cover 110a, the first gear 340 is engaged with the first rack 320, the second gear 350 is engaged with the second rack 330, the second gear 350 and the first gear 340 are both mounted on the first folding sheet 410a and coaxially rotate, and the second rack 330 and the first rack 320 extend in the same direction, so that the second gear 350 can always keep engaged with the second rack 330 in the process of engaging the first gear 340 with the first rack 320. Specifically, the first rack 320 may be fixed to the connection block 310, and the second rack 330 may be fixed to the first moving cover 110a by welding or bonding; furthermore, an axle 360 may be fixed on the first folding leaf 410a, so that the first gear 340 and the second gear 350 are both sleeved on the axle 360, and the first gear 340 and the second gear can rotate coaxially by means of a limiting structure or by directly fixing the first gear 340 and the second gear together.

The first rack 320, the second rack 330, the first gear 340 and the second gear 350 provide a transmission component in the first linkage assembly 300a, and through the above-mentioned components, the first movable cover 110a can move relative to the first folding sheet 410a by means of the force generated by the relative rotation of the first folding sheet 410a and the second folding sheet 410b along with the relative movement of the first folding sheet 410a and the second folding sheet 410 b. Of course, in order to ensure that the above actions can be performed normally, the extending directions of the first rack 320 and the second rack 330 need to be limited, for example, the first rack 320 and the second rack 330 cannot extend along the axial direction of the rotating shaft 200, the extending directions of the first rack 320 and the second rack 330 must have a component in a direction perpendicular to the rotating shaft 200, and in one embodiment of the present application, the extending directions of the first rack 320 and the second rack 330 are perpendicular to the rotating shaft 200.

In more detail, as shown in fig. 2, 13 and 15, the connecting block 310 is rotatably mounted on the rotating shaft 200 and can move relative to the first folding sheet 410 a. In the process of switching the folding mechanism from the unfolded state to the folded state, while the connecting block 310 rotates along with the first folding leaf 410a, along the direction perpendicular to the rotating shaft 200, the distance between the end of the connecting block 310 connected with the rotating shaft 200 and the axle 360 of the first gear 340 gradually decreases, so that the first rack 320 disposed on the connecting block 310 drives the first gear 340 to rotate, the rotation of the first gear 340 can make the second gear 350 rotate together, the second gear 350 is meshed with the second rack 330, since the first gear 340 and the second gear 350 rotate coaxially, and the rotation directions of the two are the same, so that the second rack 330 and the first rack 320 move in the same direction, as described above, during the rotation of the first folding leaf 410a, the distance between the end of the first rack 320 close to the rotating shaft 200 and the axle 360 of the first gear 340 gradually decreases, and the second rack 330 can move in the direction away from the rotating shaft 200, alternatively, the second rack gear 330 may be moved in a direction to be adjacent to the sidewall of the first folded page 410a, and the second rack gear 330 is integrally provided with the first moving cover 110a, so that the first moving cover 110a may be moved toward the first folded page 410a, that is, the first moving cover 110a may be moved in a direction to be adjacent to the sidewall of the first folded page 410 a. When the second movable cover 110b is also moved correspondingly, the first movable cover 110a and the second movable cover 110b may be moved away from each other.

Accordingly, in the process of switching the folding mechanism from the folded state to the unfolded state, the distance between the end of the connecting block 310 close to the rotating shaft 200 and the axle 360 of the first gear 340 gradually increases, and due to the coaxial and same-direction rotation of the first gear 340 and the second gear 350, under the transmission action of the first rack 320, the first gear 340, the second rack 330 and the second gear 350, the distance between the end of the second rack 330 close to the rotating shaft 200 and the axle 360 of the first gear 340 also gradually increases, so that the first movable cover 110a moves away from the side wall of the first folding leaf 410 a. In the case where the second moving cover 110b also moves correspondingly, the first moving cover 110a and the second moving cover 110b may be brought close to each other, and the first moving cover 110a and the second moving cover 110b may be finally butted together.

Further, as shown in fig. 2 and 13, the folding mechanism may further include a first stopper 420, and the first stopper 420 is fixed to a surface of the first folded sheet 410a facing the first moving cover 110 a. Specifically, the first stopper 420 may be fixed to the first folded sheet 410a by bonding, welding, or the like. The connecting block 310 has a limiting hole 313, and the first limiting block 420 is slidably disposed in the limiting hole 313 along the extending direction of the first rack 320. Specifically, the size and the shape of the limiting hole 313 can be designed correspondingly according to the size and the shape of the first limiting block 420, and in the extending direction of the first rack 320, the size of the limiting hole 313 is larger than the size of the first limiting block 420, so that the first limiting block 420 can slide between the two opposite ends of the limiting hole 313, the relative position between the first rack 320 and the first gear 340 is changed, and the folding mechanism is switched between the folding state and the unfolding state.

Under the condition of adopting the technical scheme, the maximum displacement of the connecting block 310 relative to the first folding page 410a can be limited by the first limiting block 420 relatively fixed with the first folding page 410a, so that the user does not need to manually control the folding and unfolding angles, the operation difficulty of the user of the folding mechanism is reduced, the first limiting block 420 and the limiting hole 313 are limited mutually, the first folding page 410a and the second folding page 410b can be ensured to rotate relatively only in the preset angle range, and the first movable cover 110a and the second movable cover 110b and the display screen 900 are prevented from being damaged due to the excessive rotation of the first folding page 410a and the second folding page 410 b. Optionally, the preset angle range may be 0 ° to 180 °, so as to ensure that the folding mechanism can be normally switched between the folded state and the unfolded state.

Further, as shown in fig. 13 and 15, the folding mechanism may further include a second stopper 430, and a size of the second stopper 430 in the extending direction of the first rack 320 may be equal to a size of the first connecting block 310. The position-limiting hole 313 is provided with a retaining part 314, the retaining part 314 may be a retaining flange, and the retaining part 314 may be formed on the inner wall of the position-limiting hole 313. The second limiting block 430 extends into the limiting hole 313 from the limiting hole 313 toward one end of the first movable cover 110a, and the inner wall of the limiting hole 313 is provided with the retaining part 314, so that after the second limiting block 430 extends into the limiting hole 313 along the above direction for a certain distance, the second limiting block 430 is affected by the limiting action of the retaining part 314, and the second limiting block 430 cannot extend into the limiting hole 313 continuously.

The second stopper 430 can be detachably and fixedly connected with the first stopper 420 by screws or magnetism, and since the first stopper 420 is fixed on the first folding sheet 410a, the second stopper 430 can exert a limiting effect on the retaining portion 314 (i.e. the connecting block 310) by being fixedly connected with the first stopper 420, and further, the connecting block 310 is relatively fixed with the fixedly connected first stopper 420 and second stopper 430 along a direction perpendicular to the extending direction of the first rack 320, in which case, the connecting portion can be prevented from moving away from the first folding sheet 410a toward the surface of the first moving cover 110a with the rotating shaft 200 as an axis, and further, the first rack 320 can stably maintain a meshing relationship with the first gear 340, and the second rack 330 can stably maintain a meshing relationship with the second gear 350.

Optionally, as shown in fig. 13 and 15, the connection block 310 includes a connection body 311 and a limit boss 312, and the connection body 311 and the limit boss 312 are fixedly connected, specifically, the connection body 311 and the limit boss 312 may be formed in an integral molding manner, so that on one hand, the processing difficulty may be reduced, and on the other hand, the connection reliability between the connection body and the limit boss may be improved.

The connecting body 311 is rotatably connected to the rotating shaft 200, and specifically, a through hole may be formed in the connecting body 311, so that the connecting body 311 may be sleeved on the rotating shaft 200 and rotatably connected to the rotating shaft 200. The first rack 320 is connected to the connecting body 311, the limiting boss 312 and the second rack 330 are both clamped between the first movable cover 110a and the connecting body 311, and the second rack 330 is clamped between the limiting boss 312 and the second gear 350. That is, one side surface of the connecting body 311 is fixedly connected to the first folding sheet 410a, the limiting projection 312 is fixedly connected to the other side of the connecting body 311, and one side of the limiting projection 312 away from the connecting body 311 is the first movable cover 110 a. The limit boss 312 and the connection body 311 can both provide a limit function for the second rack 330, so that the stability of the fit between the first rack 320 and the first gear 340, and the stability between the second rack 330 and the second gear 350 are relatively high.

Specifically, the sum of the dimensions of the second rack 330 and the limit boss 312 in the axial direction of the rotation shaft 200 may be made equal to the dimension of the connection body 311 in the aforementioned direction, which may improve the compactness of the structure in the folding mechanism, improve the space utilization, and may enable the connection body 311 to provide a reliable limit effect for the second rack 330 in the direction perpendicular to the first folded sheet 410 a.

Optionally, as shown in fig. 13 and 15, the first racks 320 are disposed on two opposite sides of the connecting block 310, and correspondingly, the number of the second racks 330, the first gears 340 and the second gears 350 may also be multiple, and the second racks are matched with the first racks 320 in a one-to-one correspondence, so as to improve the connection reliability between the first folding sheet 410a and the first movable cover 110a, and improve the stability when the first movable cover 110a is driven. Specifically, the plurality of first racks 320 may be disposed at intervals along the axial direction of the rotating shaft 200, so that each position on the first movable cover 110a can move relative to the first folding sheet 410a under the action of the first linkage assembly 300a, and the first movable cover 110a is prevented from being stuck due to uneven deflection caused by force during the moving process.

Alternatively, as shown in fig. 10 to 12, the folding mechanism further includes a sliding assembly 500, the sliding assembly 500 includes a sliding portion 510, a first rotating portion 521 and a second rotating portion 522, the sliding portion 510 is slidably and rotatably connected to the rotating shaft 200, one end of the first rotating portion 521 is rotatably connected to the sliding portion 510, the other end is rotatably connected to the first folding sheet 410a, one end of the second rotating portion 522 is rotatably connected to the sliding portion 510, and the other end is rotatably connected to the second folding sheet 410 b. Specifically, the sliding portion 510 may be a shaft sleeve, which may be sleeved on the rotating shaft 200, the first rotating portion 521 and the second rotating portion 522 may be rod-shaped structural members, and the structures of the two may be the same, and both may be connected to the sliding portion 510 through a hinge, and correspondingly, the first rotating portion 521 and the first folding leaf 410a, and the second rotating portion 522 and the second folding leaf 410b may also be rotatably connected through a hinge.

In the case of the above-mentioned technical solution, when the first folded sheet 410a rotates relative to the rotating shaft 200, the distance between the end of the first rotating portion 521 connected to the first folded sheet 410a and the rotating shaft 200 changes, and the sliding portion 510 can be driven to move on the rotating shaft 200 along the axial direction of the rotating shaft 200, and as the sliding portion 510 moves relative to the rotating shaft 200, the relative position between the second rotating portion 522 connected to the sliding portion 510 and the sliding portion 510 changes, and the distance between the end of the second rotating portion 522 connected to the second folded sheet 410b and the rotating shaft 200 changes, so that the second folded sheet 410b and the first folded sheet 410a perform the same operation, that is, are folded or unfolded relatively. Therefore, by providing the sliding assembly 500, the synchronization of the movement between the first folded page 410a and the second folded page 410b can be improved, and the synchronous unfolding or the synchronous folding between the first folded page 410a and the second folded page 410b can be ensured.

Optionally, as shown in fig. 10 and 11, the sliding assembly 500 further includes an elastic restoring member 530, the rotating shaft 200 is sleeved with the elastic restoring member 530, the elastic restoring member 530 may be specifically a compression spring, one end of the elastic restoring member 530 is connected to the sliding portion 510, and the other end of the elastic restoring member 530 is fixed to the rotating shaft 200. In this embodiment, when the folding mechanism is switched from the unfolded state to the folded state, the distance between the two opposite ends of the first rotating portion 521 may gradually decrease from the maximum value until the distance between the two opposite ends of the first rotating portion 521 reaches the minimum value, in the above process, the first rotating portion 521 may drive the sliding portion 510 to move along the same direction all the time, and the elastic restoring member 530 may be compressed during the moving process of the sliding portion 510, so that the elastic restoring member 530 stores the elastic restoring force. Afterwards, when the folding mechanism needs to be unfolded, the elastic reset piece 530 can release the elastic reset force to the sliding portion 510, so that on one hand, the unfolding difficulty of the folding mechanism can be reduced, and on the other hand, the sliding portion 510 can be reliably restored to the initial position, and the situation that the folding mechanism cannot be unfolded normally due to clamping stagnation and the like can be avoided.

Specifically, the elastic restoring member 530 can be positioned at a certain position of the sliding portion 510 and the rotating shaft 200 by means of bonding or the like, in another embodiment of the present application, optionally, the folding mechanism further includes a first limiting seat and a second limiting seat, the first limiting seat and the second limiting seat are both fixedly connected to the rotating shaft 200, the sliding portion 510 is movably disposed between the first limiting seat and the second limiting seat, and one end of the elastic restoring member 530 away from the sliding portion 510 abuts against the first limiting seat.

Specifically, the first limit seat and the second limit seat may be block-shaped structural members, both of which may be fixed at the preset position of the rotating shaft 200 by welding or bonding, and the distance between the first limit seat and the second limit seat in the axial direction of the rotating shaft 200 is greater than the dimension of the sliding portion 510 in the corresponding direction, so that the sliding portion 510 may be ensured to slide between the first limit seat and the second limit seat. In addition, the sliding part is limited by the first limiting seat and the second limiting seat, so that the sliding part 510 can be prevented from moving excessively under the action of inertia and the like, and the folding mechanism can not work normally. Meanwhile, compared with the direct connection on the rotating shaft 200, the elastic reset piece 530 is more stable in the abutting and positioning relation with the first limiting seat. More specifically, the first position-limiting seat may be a support portion 730 mentioned below, and the second position-limiting seat may be an end of the rotating shaft 200 or the first linkage assembly 300 a.

As described above, the sliding portion 510 may be a shaft sleeve, and in another embodiment of the present application, optionally, the sliding portion 510 includes a sliding body 511, a first pin 512 and a second pin 513, the sliding body 511 is provided with a through hole, a first connection hole and a second connection hole, the sliding portion 510 is sleeved on the rotating shaft 200 through the through hole, the first pin 512 is rotatably disposed in the first connection hole, the first rotating portion 521 is rotatably connected with the first pin 512, the second pin 513 is rotatably disposed in the second connection hole, and the second rotating portion 522 is rotatably connected with the second pin 513.

In this embodiment, the first rotating portion 521 and the second rotating portion 522 are both rotatably connected to the sliding body 511 through a shaft hole matching structure, so that the smoothness of the rotating relationship is relatively high, and the shaft structures are all pin shafts, which can ensure that the reliability of the rotating relationship is high. The first rotating part 521 and the second rotating part 522 may also be rotatably connected to the first folding sheet 410a and the second folding sheet 410b through a shaft hole connection structure, and in the connection relationship, the shaft structure may be a member such as a bolt detachably connected to the shaft structure, so as to facilitate the assembly and disassembly of the first folding sheet 410a and the second folding sheet 410b with the sliding assembly 500.

Optionally, as shown in fig. 8 to 11, the folding mechanism disclosed in the embodiment of the present application may further include a rotating shaft seat 600, the rotating shaft seat 600 has two rotating shaft holes 610, the number of the rotating shafts 200 is two, the two rotating shafts 200 are parallel and spaced, the two rotating shafts 200 are respectively inserted into the two rotating shaft holes 610 of the rotating shaft seat 600, one of the two rotating shafts 200 is rotatably connected to the first linkage assembly 300a, and the other is rotatably connected to the second linkage assembly 300 b. In the case of adopting the above technical solution, the difficulty of fitting between the first and second moving covers 110a and 110b and the rotating shaft 200 is relatively small, and in the case that the size of each rotating shaft 200 is relatively small, the interval between the first and second moving covers 110a and 110b can be designed to be larger, further preventing the two from interfering with the folding and unfolding processes of the folding mechanism.

Specifically, the two rotating shafts 200 may have the same structure, so as to reduce the difficulty of spare parts and improve the folding precision of the folding mechanism. The two rotating shafts 200 are inserted into the two rotating shaft holes 610 of the rotating shaft base 600, so that a whole body can be formed, and the rotating axis of the whole body is located between the two rotating shafts 200. Alternatively, the number of the rotating shaft seats 600 is plural, and the plural rotating shaft seats 600 are respectively disposed at different positions of the two rotating shafts 200, so that the connection reliability between the two rotating shafts 200 can be improved.

Optionally, the folding mechanism provided in the embodiment of the present application further includes a mounting portion, the mounting portion includes a main beam 710, a first limiting portion 720 and a second limiting portion 740, the first limiting portion 720 is fixed to the main beam 710, the second limiting portion 740 is detachably and fixedly connected to the main beam 710, and the rotating shaft 200 is clamped between the first limiting portion 720 and the second limiting portion 740. Wherein, girder 710 is through the cooperation of first spacing portion 720 and the spacing portion 740 of second and pivot 200, can promote the bulk strength of the structure that provides the rotation effect among the folding mechanism, and can provide certain support and additional action for pivot 200, promotes the precision of rotating the connection.

Specifically, the main beam 710, the first limiting portion 720 and the second limiting portion 740 may be made of a metal material, the first limiting portion 720 and the main beam 710 may be formed in an integrated manner, the second limiting portion 740 may be detachably fixed on the main beam 710 in a clamping manner or a connection manner, and the second limiting portion 740 may be disposed opposite to the first limiting portion 720, so that the rotating shaft 200 may be clamped between the first limiting portion 720 and the second limiting portion 740.

In order to further improve the reliability of the fit between the rotating shaft 200 and the mounting portion, optionally, the mounting portion further includes a supporting portion 730, the supporting portion 730 is fixed to the main beam 710, and specifically, the supporting portion 730 and the main beam 710 may be formed in an integrated manner. The first limiting portion 720 is provided with a blind hole 721 on one side facing the supporting portion 730, the supporting portion 730 is provided with a through hole 731, the rotating shaft 200 passes through the through hole 731 and is inserted into the blind hole 721, that is, the supporting portion 730 is provided on one side of the first limiting portion 720, in the process of installing the rotating shaft 200, the rotating shaft 200 can pass through the through hole 731, and one end of the rotating shaft 200 can be inserted into and supported in the blind hole 721, because the rotating shaft 200 is also inserted into the through hole 731 of the supporting portion 730, the supporting portion 730 can also provide a strong supporting effect for the rotating shaft 200, and further enhance the matching stability between the rotating shaft 200 and the main beam 710. In order to prevent the rotating shaft 200 from being separated from the main beam 710 accidentally, as described above, the rotating shaft 200 is clamped between the first limiting member and the second limiting member, specifically, the second limiting portion 740 is disposed on a side of the supporting portion 730 departing from the first limiting portion 720, the second limiting member can be fixed on the main beam 710 through a connecting member such as a screw, and the rotating shaft 200 can be prevented from coming out of the through hole 731 of the supporting portion 730 under the limiting effect of the second limiting member.

Optionally, the folding mechanism provided in this embodiment of the application further includes a bridge portion 750, the number of the mounting portions is multiple, and two adjacent mounting portions are connected by the bridge portion 750, which can reduce the length of each rotating shaft 200, and the bridge portion 750 bridges two adjacent rotating shafts 200, so as to reduce the probability of deformation of the rotating shafts 200, and improve the reliability of the folding mechanism.

As described above, one of the two rotating shafts 200 may be connected with the first linkage assembly 300a and the other may be connected with the second linkage assembly 300b, and optionally, the first linkage assembly 300a and the second linkage assembly 300b are distributed along the axial direction of the rotating shaft 200. In another embodiment of the present application, as shown in fig. 10, the first linkage assembly 300a and the second linkage assembly 300b are disposed at intervals along a direction perpendicular to the axial direction of the rotating shaft 200, that is, the first linkage assembly 300a and the second linkage assembly 300b are disposed opposite to each other, in this case, the driving directions of the first linkage assembly 300a and the second linkage assembly 300b are opposite to each other, and the action conditions are the same, and the action points of the first linkage assembly 300a and the first movable cover 110a are symmetrically disposed with respect to the action points of the second linkage assembly 300b and the second movable cover 110b, so that the forces exerted on the first movable cover 110a and the second movable cover 110b during the relative movement are more balanced, and there is substantially no more oblique action force, thereby improving the stability of the relative movement of the first movable cover 110a and the second movable cover 110 b.

Alternatively, the number of the first linkage assemblies 300a and the second linkage assemblies 300b may be multiple, the multiple first linkage assemblies 300a and the multiple second linkage assemblies 300b are matched in a one-to-one correspondence manner, and the multiple first linkage assemblies 300a may be arranged at intervals along the axial direction of the rotating shaft 200.

Further, the first linkage assembly 300a and the second linkage assembly 300b are both provided with a yielding groove, a rotating shaft seat 600 is arranged in the yielding groove, and the rotating shaft seat 600, the first linkage assembly 300a and the second linkage assembly 300b are in axial limiting fit with each other in the rotating shaft 200, so that a strong limiting effect can be generated on the positions of the first linkage assembly 300a and the second linkage assembly 300b, and the first linkage assembly 300a and the second linkage assembly 300b form a whole, in this case, the probability that the first linkage assembly 300a and the second linkage assembly 300b move together along the axial direction of the rotating shaft 200 is extremely low, and therefore, the reliability of the folding mechanism can be guaranteed to be relatively high.

In addition, when the number of the rotating shafts 200 is two, two through holes may be formed on the sliding portion 510 to be respectively inserted into the two rotating shafts 200. Alternatively, as shown in fig. 10, the sliding part 510 may include two symmetrical parts, which are respectively rotatably engaged with the two rotating shafts 200, and one of the two parts is connected with the first rotating part 521 and the other is connected with the second rotating part 522. In order to ensure that the sliding part 510 with the above structure can make the first rotating part 521 and the second rotating part 522 operate synchronously, the two parts of the sliding part 510 may be correspondingly formed with a structure similar to the yielding groove pattern of the first linkage assembly 300a and the second linkage assembly 300b, and the two parts of the sliding part 510 may also be ensured to be mutually limited in the axial direction of the rotating shaft 200 by arranging the rotating shaft seat 600 in the yielding groove.

Optionally, as shown in fig. 7, the first folded sheet 410a includes a bearing portion 412 and a side portion connected to one side of the bearing portion 412, so that the first folded sheet 410a is of a three-dimensional structure, the bearing portion 412 can provide a bearing function for the display screen 900, and the bearing portion 412 may be a rectangular plate-shaped structural member, so as to provide a more reliable bearing function; optionally, a chamfer may be disposed at a corner of the bearing part 412, so that the corner of the electronic device including the folding mechanism is smoother, and appearance performance and hand feeling of the whole device are improved. The side portion is a sidewall of the first folded leaf 410a, which can surround an edge of the carrying portion 412, thereby providing a shielding and shielding function for the structure between the first folded leaf 410a and the first movable cover 110a and ensuring the structural integrity of the folding mechanism.

The side portion includes a first side wall 413, a second side wall 414 and a third side wall 415, the first side wall 413 and the second side wall 414 are oppositely arranged along the axial direction of the rotating shaft 200, and in conjunction with the above description of the width direction, the first side wall 413 and the second side wall 414 can be regarded as two opposite side walls of the folding mechanism in the width direction; the third sidewall 415 is connected between the first sidewall 413 and the second sidewall 414, and in the case that the second folded page 410b also adopts the above structure, the third sidewall 415 of the second folded page 410b and the third sidewall 415 of the first folded page 410a together form two sidewalls opposite to each other in the length direction of the electronic device. It should be noted that, in order to assist in describing the moving direction of the first moving cover 110a and the first folding sheet 410a, the first folding sheet 410a includes a sidewall, which is the third sidewall 415.

As described above, the first moving cover 110a is coupled with the first folded sheet 410a by the first linkage assembly 300a, in order to improve the reliability of the connection between the first moving cover 110a and the first folded sheet 410a, in another embodiment of the present application, optionally, as shown in fig. 7, 16 and 17, the folding mechanism further includes a slider 120, the slider 120 is detachably fixed to a surface of the first moving cover 110a facing the first folded sheet 410a, and ensures normal assembly between the first moving cover 110a and the first folded sheet 410a, specifically, the slider 120 may be detachably fixed to the first moving cover 110a by a screw or the like, and more specifically, as shown in fig. 17, the first movable cover 110a may be provided with a through hole, and a connecting member may pass through the through hole and extend into the slider 120, so as to detachably connect the slider 120 and the first movable cover 110 a.

At least one of the first side wall 413 and the second side wall 414 is provided with a sliding slot 411, the sliding slot 411 extends along a direction perpendicular to the axial direction of the rotating shaft 200, more intuitively, the sliding slot 411 extending along the length direction is provided on the first folding sheet 410a, the slider 120 is in sliding fit with the sliding slot 411, so that along with the relative rotation of the first folding sheet 410a and the second folding sheet 410b, the relative movement process of the first movable cover 110a and the first folding sheet 410a in the length direction can be more stable, and the sliding slot 411 can provide guiding and limiting effects for the first movable cover 110a, thereby improving the movement accuracy of the first movable cover 110a and reducing the movement difficulty of the first movable cover 110 a.

More specifically, in the process of assembling the first movable cover 110a and the first folding sheet 410a, the sliding block 120 may be first installed in the sliding slot 411 of the first folding sheet 410a, so that the sliding block 120 and the sliding slot 411 are slidably engaged in the aforementioned length direction, and the first movable cover 110a may be fixed on the sliding block 120 through the detachable connector, thereby improving the reliability of the connection relationship between the first movable cover 110a and the first folding sheet 410 a. The size and the installation position of the sliding chute 411 in the longitudinal direction can be determined according to the maximum value of the relative movement between the first movable cover 110a and the first folding sheet 410a and the initial position between the first movable cover 110a and the first folding sheet 410a, which is not limited herein.

Alternatively, the sliding grooves 411 are respectively disposed on the first side wall 413 and the second side wall 414, that is, the first side wall 413 is disposed on one side of the second side wall 414, and the second side wall 414 is disposed on one side of the first side wall 413 is disposed on one side of the second side wall 411, and correspondingly, the sliding grooves 411 are respectively disposed on both the sliding grooves 411, so that both opposite ends of the first movable cover 110a can be connected with the first folding sheet 410a through the sliding blocks 120, which can further improve the fitting stability between the first movable cover 110a and the first folding sheet 410 a. In addition, the first and second substrates are,

further, as shown in fig. 7 and 16, the first folding sheet 410a further includes a matching portion 416, the matching portion 416 is fixed to the bearing portion 412, the matching portion 416 is located between the first side wall 413 and the second side wall 414, the matching portion 416 is provided with a sliding slot 411, that is, by providing the matching portion 416 between the first side wall 413 and the second side wall 414 and providing the sliding slot 411 on the matching portion 416, a middle portion of the first movable cover 110a located between two opposite ends can be connected to the first folding sheet 410a through the slider 120, so that the middle portion of the first movable cover 110a can also form a stable and reliable limit connection relationship with the first folding sheet 410a, and further, the matching stability between the first movable cover 110a and the first folding sheet 410a is improved.

Specifically, the shape and size of the fitting portion 416 may be determined according to actual requirements, and are not limited herein, and the number of the fitting portions 416 may also be multiple, and the fitting stability between the first moving cover 110a and the first folding sheet 410a may be further improved by disposing multiple fitting portions 416 between the first side wall 413 and the second side wall 414 at intervals along the axial direction of the rotating shaft 200. Correspondingly, the slider 120 connected with the matching portion 416 is also detachably and fixedly connected with the first movable cover 110a through a connecting member.

As described above, as the first folded page 410a rotates around the rotating shaft assembly 800, the first movable cover 110a can move relative to the first folded page 410a, and during the movement of the first movable cover 110a away from the third side wall 415 of the first folded page 410a, a certain gap may be generated between the first movable cover 110a and the third side wall 415, thereby reducing the packaging effect of the folding mechanism.

Alternatively, a portion of the end portion of the first movable cover 110a close to the third side wall 415 is made of a flexible material, and an end edge of the first movable cover 110a facing away from the rotation shaft 200 in the length direction is curved to protrude into the inner side of the third side wall 415, and a certain length margin is provided for the first movable cover 110 a. In this case, as the first moving cover 110a moves away from the third sidewall 415, a portion of the aforementioned remaining portion of the first moving cover 110a that extends into the inside of the third sidewall 415 may extend from the inside of the third sidewall 415, thereby compensating for a size difference caused by the first moving cover 110a moving away from the third sidewall 415; accordingly, during the process that the first movable cover 110a moves close to the third sidewall 415, the remaining portion of the first movable cover 110a can be extended and retracted to the inner side of the third sidewall 415 again, so that the remaining portion is "stored", the folding mechanism can be folded and unfolded normally, and the packaging integrity of the whole folding mechanism can be good.

In another embodiment of the present application, optionally, as shown in fig. 20 and 21, the folding mechanism further includes a housing 130, the housing 130 is connected with the side portion, and the housing 130 is disposed opposite to the bearing portion 412, and the housing 130 is in lap-fit with the first movable cover 110 a. Specifically, the housing 130 may be a flat plate-shaped structural member that is disposed opposite to the bearing portion 412 in the first folded sheet 410a, connected by a side portion, and forms an accommodating space, and the first linkage assembly 300a, the slider 120, the fitting portion 416, and the like may be disposed between the housing 130 and the bearing portion 412, and at least a portion of the first moving cover 110a is located between the bearing portion 412 and the housing 130. The housing 130 and the side portion may be connected to each other by a connecting member such as a screw. In addition, the housing 130 may be provided on the second folded page 410b, and when the second folded page 410b and the first folded page 410a have the same structure and the second movable cover 110b and the first movable cover 110a have the same structure, the housing 130 provided on the second folded page 410b has the same structure as the housing 130 provided on the first folded page 410 a.

With the above technical solution, the sealing connection performance between the housing 130 and the side portion, especially between the housing 130 and the third side wall 415, is better, and the overall packaging reliability of the folding mechanism can be improved. Moreover, by engaging the housing 130 with the first movable cover 110a, during the relative movement between the first movable cover 110a and the third side wall 415, the size of the overlapping portion between the first movable cover 110a and the housing 130 can be increased or decreased to ensure that the first movable cover 110a can move toward the third side wall 415, or the first movable cover 110a can move away from the third side wall 415.

Optionally, the first movable cover 110a includes an overlapping portion and an abutting portion connected to each other, at least a portion of the overlapping portion is located between the housing 130 and the carrying portion 412, and in the unfolded state, the abutting portion abuts and is flush with the housing 130. Under the condition of adopting the foregoing solution, the overlapping portion is located between the bearing portion 412 of the first folding leaf 410a and the housing 130, and the abutting portion is disposed in parallel and level with the housing 130, so that while the first movable cover 110a can realize relative motion with the housing 130 by means of the overlapping portion, one side of the folding mechanism away from the bearing portion 412 can have a relatively flat surface, that is, under the condition that the folding mechanism is in the unfolded state, the surface of the abutting portion is disposed in a coplanar manner with the surface of the housing 130, so that the flatness of the folding mechanism is relatively stronger, the internal space of the electronic device can be made larger, and the appearance performance of the folding mechanism and the electronic device can be improved to a certain extent.

As described above, the housing 130 and the first folding sheet 410a can be connected by a connecting member such as a screw, and optionally, the side portion is provided with a support base 440, and the housing 130 is lapped on the support base 440, in this case, the side portion can provide a support function for the housing 130, so as to improve the stress performance of the housing 130, and the side portion can also surround the housing 130, so as to further improve the connection reliability between the housing 130 and the first folding sheet 410 a. In the above embodiment, the connecting member penetrating through the casing 130 may be fixed on the supporting platform 440, or the casing 130 and the first folding sheet 410a may be fixedly connected by bonding, etc. in the case that the supporting platform 440 is provided, the contact area between the casing 130 and the first folding sheet 410a may be greatly increased, and the bonding reliability between the two may also be ensured to be high.

Further, the overlapping portion is flush with the support table 440 along the thickness direction of the bearing portion 412, which makes the overlapping tightness between the first movable cover 110a and the housing 130 higher, further preventing foreign substances such as dust from entering the folding mechanism from the gap between the first movable cover 110a and the housing 130.

As described above, the rotation shaft assembly 800 may include a rotation shaft, a hinge, or the like, and optionally, as shown in fig. 3 to 7, the rotation shaft assembly 800 includes a connection seat 820 and a plurality of support bars 810, the plurality of support bars 810 being arranged side by side. Specifically, the number of the supporting strips 810 may be two, three, or more, and the sizes of the plurality of supporting strips 810 may be the same, so that the bending degree at each position of the rotating shaft assembly 800 is substantially the same in the bending process, and in the case that the display screen of the electronic device is a flexible screen, the supported effect at each position in the area of the display screen matched with the rotating shaft assembly 800 is substantially the same, and the supported effect of the display screen is ensured to be better.

Optionally, the number of the supporting strips 810 is odd and is greater than 3, in this case, during the rotation deformation of the rotating shaft assembly 800, the supporting strip located at the middle of the plurality of supporting strips 810 can be used as the rotating shaft of the whole rotating shaft assembly 800, so that the rotation form of the rotating shaft assembly 800 is more symmetrical, and the supporting effect of the rotating shaft assembly 800 is further improved. Particularly, the supporting bar located at the middle of the supporting bars 810 can be a fixing supporting bar, the supporting bars on the two sides of the fixing supporting bar back to back can be rotating supporting bars, and the two sides of the fixing supporting bar back to back are respectively provided with the rotating supporting bars with the same number. In addition, in the case that the number of the supporting bars 810 is large, the rotation angle of each supporting bar 810 can be relatively small, so that the bending uniformity of the rotating shaft assembly 800 is stronger.

As shown in fig. 3 and 4, two adjacent support bars 810 are rotatably connected by a connection seat 820, specifically, the connection seat 820 may be a hinge, which is fixedly connected with the two support bars 810 to enable the two support bars 810 to rotate relatively, the connection seat 820 and the support bars 810 may be connected to each other by bonding, welding, or connecting members, and the connection between the connection seat 820 and the support bars 810 may include overlapping or sleeving. More specifically, two adjacent support bars 810 may be connected by one connecting seat 820, the connecting seat 820 may be disposed in the middle of the length direction of the support bar 810, or the two support bars 810 may also be connected by a plurality of connecting seats 820, the plurality of connecting seats 820 may be spaced apart along the length direction of the support bar 810, which may improve the connection reliability between the two support bars 810.

The pivot subassembly 800 that this application embodiment discloses includes connecting seat and a plurality of support bar, and two adjacent support bars pass through the connecting seat and rotate the connection to make pivot subassembly 800 possess the ability of buckling deformation, and whole pivot subassembly 800's structure is comparatively simple, and the manufacturing, equipment of being convenient for can reduce cost to a certain extent.

In the process of connecting the first folding sheet 410a and the second folding sheet 410b through the rotating shaft assembly 800, the support strip 810 on the first side of the rotating shaft assembly 800 is connected with the first folding sheet 410a, the support strip 810 on the second side of the rotating shaft assembly 800 is connected with the second folding sheet 410b, and the first side and the second side are opposite sides of the rotating shaft assembly 800. As described above, the first and second folded

pages

410a and 410b may have the same structure, and for convenience of description, only the connection relationship between the first folded page 410a and the rotation shaft assembly 800 will be described below for reference of the connection manner between the second folded page 410b and the rotation shaft assembly 800.

Specifically, the supporting bar 810 and the first folded sheet 410a may be connected together by using an adhesive, a connector, or the like. More specifically, the supporting strips 810 and the first folding sheet 410a may be directly connected to each other, or indirectly connected to each other through other structures, so as to meet different requirements.

Based on the above embodiment, the pivot subassembly 800 disclosed in the embodiment of the present application can be applied to electronic equipment, the support strips 810 located on the opposite sides of the pivot subassembly 800 are all connected with the first folding sheet 410a, thereby making the electronic equipment including the pivot subassembly 800 foldable and unfoldable, under the condition that the electronic equipment is in the folded state, the whole size of the electronic equipment is relatively small, and the electronic equipment is convenient to carry, under the condition that the electronic equipment is in the unfolded state, the unfolded area is relatively large, thereby being capable of configuring a display screen with a large area for the electronic equipment, making the electronic equipment have a large display area, and thus the electronic equipment adopting the pivot subassembly 800 can take both portability and display area into account.

Further, as shown in fig. 5, each connecting seat 820 may be provided with two positioning holes 821 having the same axial direction, each connecting seat 820 includes a connecting seat 820, each support bar 810 is provided with a first connecting shaft 850, and the first connecting shafts 850 of two adjacent support bars 810 are rotatably connected through the connecting seat 820. That is, the connection relationship between the connection seat 820 and the support bar 810 is formed by the way of matching the shaft holes, so that the connection relationship between the support bars 810 is reliable, and the stability of the matching between the support bars 810 and the connection seat 820 can be improved.

Specifically, the first connecting shaft 850 and the positioning hole 821 can both be cylindrical structures, so that the gap between the positioning hole 821 and the first connecting shaft 850 is reduced, and the stability of the rotation fit is improved. Optionally, the first connecting shafts 850 are provided at the ends of the supporting bars 810, and the opposite ends of the supporting bars 810 may be provided with the first connecting shafts 850, which enables the connecting socket 820 to connect the two supporting bars 810. Alternatively, the first connecting shaft 850 may be disposed at one side of the supporting bar 810, for example, the first connecting shaft 850 is bent and has one end connected to one side of the supporting bar 810 and the other end inserted into the positioning hole 821, which also ensures that the connecting seat 820 can provide a connecting function for two adjacent supporting bars 810.

In the case that the first connecting shafts 850 are provided at one side of the supporting bars 810, optionally, as shown in fig. 3 and 4, each of the supporting bars 810 is provided with a plurality of the first connecting shafts 850, and the plurality of the first connecting shafts 850 are provided at intervals in the axial direction of the first connecting shafts 850. That is, two adjacent support bars 810 are connected to each other through the plurality of first connecting shafts 850 and the plurality of connecting seats 820, so that the connection reliability of all the positions on the support bars 810 can be relatively high, and the connection stability between the support bars 810 can be ensured to be higher.

Further, as shown in fig. 5, each of the supporting bars 810 may be provided with a second connecting shaft 860, and an axis of the second connecting shaft 860 is parallel to an axis of the first connecting shaft 850. Under the condition of adopting the above technical solution, the supporting strip 810 and the first folding leaf 410a can also form a rotating connection relationship through the shaft hole matching structure, so that the connection and the rotating matching relationship between the supporting strip 810 and the first folding leaf 410a are also more reliable. Accordingly, in the case that the number of the supporting bars 810 is at least three, by simultaneously providing the first and second connecting

shafts

850 and 860 on the supporting bars 810, the connection reliability between the supporting bars 810 and the two supporting bars 810 located at both sides thereof, and between the supporting bars 810 and the first folding leaf 410a, is relatively high.

Meanwhile, the second connecting shaft 860 is provided with the connecting seat 820, as described above, the connecting seat 820 is provided with two positioning holes 821, in this embodiment, at least one of the two positioning holes 821 of the connecting seat 820 is inserted into and rotationally matched with the second connecting shaft 860. In more detail, the two second connecting shafts 860 can be inserted into the two positioning holes 821 of the connecting seat 820 in a one-to-one correspondence manner, so that the two adjacent supporting bars 810 are connected into a whole by the connecting seat 820; alternatively, one of the two positioning holes 821 of the connecting base 820 is inserted into and rotationally engaged with the second connecting shaft 860, and the other is rotationally engaged with the first folding leaf 410a, so that the rotational engagement relationship between the supporting bar 810 and the first folding leaf 410a is more stable. Alternatively, one of the two positioning holes 821 of the connecting seat 820 connected to the first connecting shaft 850 may be connected to the first connecting shaft 850, and the other may be rotatably connected to the first folding leaf 410a, so as to achieve the purpose of connecting the supporting bar 810 and the first folding leaf 410a through the connection relationship between the first connecting shaft 850 and the connecting seat 820.

As described above, the support bar 810 may be provided with the first connecting shaft 850 and the second connecting shaft 860, and optionally, the shapes and sizes of the first connecting shaft 850 and the second connecting shaft 860 may be the same, in which case, the same connecting seat 820 may be matched with both the first connecting shaft 850 and the second connecting shaft 860, so that the connecting difficulty of the connecting seat 820 and the support bar 810 may be reduced, and the assembling efficiency may be improved. In addition, the first folding leaf 410a and the supporting bar 810 may be connected to each other through a shaft hole connection structure, optionally, the first folding leaf 410a may also be provided with a connection shaft, and under the condition that the shapes and sizes of the connection shaft, the first connection shaft 850 and the second connection shaft 860 are the same, the shapes and sizes of the plurality of connection seats 820 in the rotation shaft assembly 800 may be the same, in this case, only one type of connection seat 820 may be provided, so that on one hand, the difficulty and cost of spare parts may be reduced, and on the other hand, the difficulty of assembling the rotation shaft assembly 800 may be further reduced.

In the case that the support bars 810 are provided with the first and second connecting

shafts

850 and 860, optionally, the first and second connecting

shafts

850 and 860 may be provided at the ends of the support bars 810 at intervals, and the plurality of support bars 810 may be rotatably connected together by the plurality of connecting seats 820.

In another embodiment of the present application, optionally, as shown in fig. 5, the first connecting shaft 850 and the second connecting shaft 860 may be disposed at one side of the supporting bars 810, in which case, the number of the first connecting shaft 850 and the second connecting shaft 860 disposed at the same supporting bar 810 may be increased, thereby improving the connection reliability and rotational stability between the adjacent supporting bars 810, and between the supporting bars 810 and the first folding page 410 a.

Based on the above embodiment, optionally, as shown in fig. 5, one side of the supporting bars 810 is provided with the first receiving groove 811, and the first connecting shaft 850 is disposed inside the first receiving groove 811, in which case the first connecting shaft 850 does not extend out of the supporting bars 810, so that when two adjacent supporting bars 810 are connected to each other, the gap between the supporting bars 810 can be smaller, and the supporting performance of the rotating shaft assembly 800 is further improved. Correspondingly, at least a portion of the connection seat 820 connected to the first rotation shaft may be received within the first receiving groove 811. More specifically, as described above, the two first coupling shafts 850 may be rotatably coupled as one body by one coupling seat 820. Based on the above technical solution, optionally, a portion of the connecting seat 820 may be received in one first receiving groove 811, and another portion of the connecting seat 820 may be received in another first receiving groove 811, so as to further reduce the gap between the supporting bars 810. Of course, a certain gap needs to be reserved between the support bar 810 and the support bar 810 to ensure that the two can normally rotate relatively.

Specifically, the first receiving groove 811 may be formed at one side of the supporting bar 810 by digging a hole, and the first connecting shaft 850 may be formed by a remaining portion structure in the process of forming the first receiving groove 811; alternatively, the first receiving groove 811 may be formed in the supporting bar 810, and then the first connecting shaft 850 may be fixed in the first receiving groove 811 by welding or bonding; alternatively, a through hole extending along the length direction of the supporting bar 810 may be formed on the supporting bar 810, and the first connecting shaft 850 may extend from one end of the supporting bar 810 and be fixed at the first receiving groove 811. Of course, the first receiving groove 811 and the first connecting shaft 850 can be formed in various ways, and for the sake of brevity, they are not listed here.

Correspondingly, as shown in fig. 5, the other side of the supporting bars 810 is provided with a second receiving groove 812, the second connecting shaft 860 is disposed within the second receiving groove 812, and at least a portion of the connecting seat 820 connected with the second connecting shaft 860 is received within the second receiving groove 812, thereby reducing a gap between the two supporting bars 810 connected by the second connecting shaft 860. The second receiving grooves 812 and the second connecting shafts 860 may be formed in a similar manner to the first receiving grooves 811 and the first connecting shafts 850, and will not be explained in detail herein. In addition, in the above embodiment, the connection seat 820 may be made of an elastic material, and by communicating the hole wall of the positioning hole 821 with the outside of the positioning hole 821, the connection seat 820 may be sleeved on the first connection shaft 850 and the second connection shaft 860, and the connection relationship between the connection seat 820 and the first connection shaft 850 and the second connection shaft 860 may be relatively stable.

Based on the above-mentioned embodiment, optionally, at least one of the first connecting shafts 850 and the second connecting shafts 860 is plural in number, in which case, the connection reliability between the supporting bars 810 and the first folded page 410a can be further improved. The plurality of first connecting shafts 850 and/or the plurality of second connecting shafts 860 extend along the length direction of the support bar 810.

In the case that the supporting bar 810 is provided with the first and second receiving

grooves

811 and 812, optionally, as shown in fig. 5, the first receiving groove 811 has first and second

opposite groove walls

811a and 811a, and the first connecting shaft 850 is connected to the first groove wall 811a, thereby ensuring that a reliable fixed connection relationship can be formed between the first connecting shaft 850 and the supporting bar 810. An end of the first connecting shaft 850 facing away from the first groove wall 811a is provided with a first preset interval between the first connecting shaft 850 and the second groove wall in the axial direction, that is, the second connecting shaft 860 is not connected to the second groove wall. In the process of assembling the support bar 810 and the connection holder 820, the connection holder 820 can be mounted to the first connection shaft 850 from a first predetermined interval, thereby enabling the connection holder 820 to form a stable fitting relationship with the first connection shaft 850.

Optionally, as shown in fig. 5, the second receiving groove 812 has a third groove wall and a fourth groove wall 812a opposite to each other, the second connecting shaft 860 is connected to the third groove wall, so that the second connecting shaft 860 can also form a reliable fixed connection relationship with the supporting bar 810, and an end of the second connecting shaft 860 facing away from the third groove wall is provided with a second predetermined interval in the axial direction of the second connecting shaft 860, so that the connecting seat 820 can be mounted on the second connecting shaft 860 from the second predetermined interval, and the connecting seat 820 and the second connecting shaft 860 form a stable rotation fit relationship.

Based on the above embodiment, optionally, after the connecting seat 820 is sleeved on the first connecting shaft 850, a sealing cap may be disposed at an end of the first connecting shaft 850 away from the first groove wall 811a to prevent the connecting seat 820 from accidentally falling off from the first connecting shaft 850. Similarly, the end of the second connecting shaft 860 away from the third groove wall may also be provided with a sealing cap or the like.

In another embodiment of the present application, optionally, as shown in fig. 5, the rotating shaft assembly 800 disclosed in the embodiment of the present application further includes a first blocking portion 841 and a second blocking portion 842, the first blocking portion 841 is disposed in the first predetermined interval, that is, the first predetermined gap is filled by the first blocking portion 841, in this case, after the connecting seat 820 is mounted on the first connecting shaft 850 through the first predetermined gap, the first blocking portion 841 may be mounted in the first predetermined gap, and the first blocking portion 841 is connected with the supporting bar 810, so that the first blocking portion 841, the connecting seat 820 (mounted on the first connecting shaft 850) and the supporting bar 810 are in limit fit in the axial direction of the first connecting shaft 850, that is, the first blocking portion 841 and the connecting seat 820 may be limited between the first groove wall 811a and the second groove wall of the first groove wall 811. Adopt above-mentioned technical scheme, can guarantee that the connecting seat 820 of installing on first connecting axle 850 can not drop from first connecting axle 850 unexpected basically, and because first shutoff portion 841 can install to first predetermineeing in the clearance from a plurality of directions of first holding tank 811, consequently, the installation degree of difficulty of first shutoff portion 841 is also relatively less.

The second blocking portion 842 is arranged in the second preset gap, and along the axial direction of the second connecting shaft 860, the second blocking portion 842, the connecting seat 820 (installed on the second connecting shaft 860) and the supporting bar 810 are in limit fit, so that the connecting seat 820 installed on the second connecting shaft 860 cannot accidentally fall off from the second connecting shaft 860, and the difficulty in completing the blocking work can be reduced. Specifically, the specific shape and size of the first blocking portion 841 and the second blocking portion 842 may be correspondingly determined according to the specific size of the first preset gap and the second preset gap, which is not limited herein. In addition, the first blocking portion 841 and the second blocking portion 842 can be fixed on the supporting bars 810 by means of bonding, clamping, or connecting members. Optionally, the first blocking portion 841 and the second blocking portion 842 are detachably connected to the supporting bar 810, so as to facilitate maintenance and repair work of the rotary shaft assembly 800. Specifically, the first blocking portion 841 and the second blocking portion 842 can be detachably and fixedly connected with the supporting bar 810 by a connecting member such as a screw.

Optionally, the first receiving groove 811 and the second receiving groove 812 are arranged in pair, in this case, as shown in fig. 5, the first blocking portion 841 and the second blocking portion 842 are fixedly connected through the fixing portion 843, the three constitute the plug 840, the fixing portion 843 is detachably and fixedly connected with the supporting bar 810, so that in the process of assembling the rotating shaft assembly 800, the installation work of the first blocking portion 841 and the second blocking portion 842 can be completed together, the assembling difficulty of the rotating shaft assembly 800 can be reduced, and the assembling efficiency is improved. In addition, in the above embodiment, the first blocking portion 841 and the second blocking portion 842 are both fixedly connected to the supporting bar 810 through the fixing portion 843, which can also improve the assembly efficiency of the rotating shaft assembly 800.

Specifically, the fixing portion 843 and the supporting bar 810 can be detachably and fixedly connected by a connector such as a screw, and the specific shape of the fixing portion 843 can be determined according to parameters such as the shape of the supporting bar 810. Optionally, the first blocking portion 841, the second blocking portion 842 and the fixing portion 843 may be formed in an integrated manner, so as to further improve the assembly difficulty of the rotating shaft assembly 800, and enable the connection reliability between the three to be relatively high.

Further, can be provided with the heavy groove of installation on the support bar 810, fixed part 843 can set up in the heavy groove of installation, and with support bar 810 detachably fixed connection, under this condition, can increase fixed part 843's thickness to a certain extent to can promote fixed part 843's structural strength and fixed effect. Specifically, the shape of the installation recess is the same as or similar to the shape of the fixing portion 843, and the sizes of the two are also the same.

As described above, the first receiving groove 811 has the first groove wall 811a to which the first connecting shaft 850 is coupled and the second receiving groove 812 has the third and fourth groove walls 812a to which the second connecting shaft 860 is coupled. Alternatively, in the axial direction of the first connecting shaft 850, the first groove wall 811a and the third groove wall may be adjacently disposed, that is, the second groove wall, the first groove wall 811a, the third groove wall, and the fourth groove wall 812a are distributed along the axial direction of the first connecting shaft 850.

In another embodiment of the present application, optionally, the second and fourth groove walls 812a are located between the first and

third groove walls

811a and 812a in the axial direction of the first connecting shaft 850, that is, the first, second, fourth and

third groove walls

811a, 812a and 850 are distributed in the axial direction of the first connecting shaft 850, in which case, the interval between the connecting socket 820 connected with the first connecting shaft 850 and the connecting socket 820 connected with the second connecting shaft 860 is relatively greater in the axial direction of the first connecting shaft 850, and the connecting sockets 820 are more dispersed, so that the connection reliability between the supporting bars 810 and everywhere between the supporting bars 810 and the first folded leaf 410a is relatively higher.

As described above, the supporting bar 810 and the first folding leaf 410a can also be connected by the connecting seat 820, the supporting bar 810 can be provided with the first connecting shaft 850 and/or the second connecting shaft 860, and correspondingly, the first folding leaf 410a can also be provided with a connecting shaft to be rotatably connected with the connecting seat 820.

In another embodiment of the present application, optionally, as shown in fig. 6 and 7, the rotating shaft assembly 800 may further include a shaft connecting block 830, the shaft connecting block 830 includes a block body 831 and a third connecting shaft 832, the block body 831 may be detachably and fixedly connected with the first folding leaf 410a, and the third connecting shaft 832 may be inserted into and rotatably fitted with the positioning hole 821 of the connecting block 820. Under the condition of adopting the technical scheme, the structure of the first folding page 410a is relatively regular, so that the first folding page 410a is ensured to have a higher protection effect, and the first folding page 410a can be indirectly connected with the rotating shaft assembly 800 through the shaft connecting block 830, so that the structural design limitation of the first folding page 410a can be eliminated to a certain extent.

Specifically, the block body 831 and the third connecting shaft 832 may also be formed in an integrated manner to improve the connecting strength therebetween. The block body 831 and the first folding leaf 410a can be fixedly connected into a whole in a detachable connection mode, so that the first folding leaf 410a and the rotating shaft assembly 800 can be detached, and the first folding leaf 410a and the rotating shaft assembly 800 can be maintained conveniently.

Based on the folding mechanism provided in any of the above embodiments, an electronic device is further provided in the embodiments of the present application, which includes the display screen 900 and any of the above folding mechanisms, as shown in fig. 20, the display screen 900 is supported by the folding mechanism, and the display screen 900 is located at a side of the first folding sheet 410a facing away from the first moving cover 110 a. The display screen 900 may be a flexible screen to ensure maximization of a display area.

Under the condition that above-mentioned electronic equipment is in the expanded state, its display area is great relatively, under this electronic equipment is in folded state, can promote the portability to a certain extent to make electronic equipment can compromise great display area and better portability.

The electronic device disclosed by the embodiment of the application can be a smart phone, a tablet computer, an electronic book reader or a wearable device. Of course, the electronic device may also be other devices, which is not limited in this embodiment of the application.

In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A folding mechanism, comprising:

a first folded page;

2. The folding mechanism of claim 1 wherein said first linkage assembly moves said first movable cover away from said first folded leaf and said second linkage assembly moves said second movable cover away from said second folded leaf during switching of said folding mechanism from said folded state to said unfolded state.

3. The folding mechanism of claim 1 wherein said first linkage assembly comprises:

the connecting block is movably arranged between the first folding page and the first movable cover and is rotationally connected with the rotating shaft;

the first rack is connected to the connecting block;

the second rack is connected to the first movable cover, and the second rack and the first rack extend in the same direction;

a first gear engaged with the first rack;

the second gear is meshed with the second rack, and the second gear and the first gear are both arranged on the first folding page and rotate coaxially;

folding mechanism certainly expand the state to the in-process that fold condition switched, the connecting block with first fold page or leaf relative movement, and drive first rack drive first gear revolve, first gear drives second gear drive second rack and removes, the second rack moves first removal lid orientation first fold page or leaf removes.

4. The folding mechanism as claimed in claim 3, further comprising a first limiting block, wherein the first limiting block is fixed on a surface of the first folding sheet facing the first movable cover, the connecting block is provided with a limiting hole, and the first limiting block is slidably disposed in the limiting hole along an extending direction of the first rack.

5. The folding mechanism according to claim 4, further comprising a second limiting block, wherein a clamping portion is arranged in the limiting hole, the second limiting block extends into the limiting hole from the limiting hole towards one end of the first movable cover, the second limiting block is detachably and fixedly connected with the first limiting block, and the connecting block is relatively fixed with the first limiting block and the second limiting block which are fixedly connected with each other along a direction perpendicular to the extending direction of the first rack.

6. The folding mechanism according to claim 3, wherein the connecting block includes a connecting body and a limiting boss, the connecting body is rotatably connected to the rotating shaft, the first rack is connected to the connecting body, the limiting boss and the second rack are clamped between the first movable cover and the connecting body, and the second rack is clamped between the limiting boss and the second gear.

7. The folding mechanism of claim 1 further comprising a sliding assembly, said sliding assembly comprising a sliding portion, a first rotating portion and a second rotating portion, said sliding portion being slidably and rotatably connected to said rotating shaft, one end of said first rotating portion being rotatably connected to said sliding portion and the other end being rotatably connected to said first folding sheet, one end of said second rotating portion being rotatably connected to said sliding portion and the other end being rotatably connected to said second folding sheet.

8. The folding mechanism of claim 7, wherein the sliding assembly further comprises an elastic restoring member, the elastic restoring member is sleeved on the rotating shaft, one end of the elastic restoring member is connected with the sliding portion, and the other end of the elastic restoring member is fixed on the rotating shaft.

9. The folding mechanism according to claim 8, further comprising a first limiting seat and a second limiting seat, wherein the first limiting seat and the second limiting seat are both fixedly connected to the rotating shaft, the sliding portion is movably disposed between the first limiting seat and the second limiting seat, and one end of the elastic reset member departing from the sliding portion abuts against the first limiting seat.

10. The folding mechanism of claim 7, wherein the sliding portion includes a sliding body, a first pin and a second pin, the sliding body is provided with a through hole, a first connecting hole and a second connecting hole, the sliding portion is sleeved on the rotating shaft through the through hole, the first pin is rotatably disposed in the first connecting hole, the first rotating portion is rotatably connected with the first pin, the second pin is rotatably disposed in the second connecting hole, and the second rotating portion is rotatably connected with the second pin.

11. The folding mechanism according to claim 1, further comprising a rotation shaft seat, wherein the rotation shaft seat has two rotation shaft holes, the number of the rotation shafts is two, the two rotation shafts are parallel and spaced, and are respectively inserted into the two rotation shaft holes of the rotation shaft seat, one of the two rotation shafts is rotatably connected to the first linkage assembly, and the other rotation shaft is rotatably connected to the second linkage assembly.

12. The folding mechanism of claim 11, further comprising an installation portion, wherein the installation portion comprises a main beam, a first limiting portion and a second limiting portion, the first limiting portion is fixed to the main beam, the second limiting portion is detachably and fixedly connected with the main beam, and the rotating shaft is clamped between the first limiting portion and the second limiting portion.

13. The folding mechanism of claim 12, wherein the mounting portion further includes a supporting portion, the supporting portion is fixed to the main beam, a blind hole is formed in a side of the first limiting portion facing the supporting portion, a through hole is formed in the supporting portion, the rotating shaft passes through the through hole and is inserted into the blind hole, and a second limiting portion is disposed on a side of the supporting portion away from the first limiting portion.

14. The folding mechanism of claim 11 wherein said first linkage assembly and said second linkage assembly are spaced apart in a direction perpendicular to an axial direction of said shaft.

15. The folding mechanism according to claim 14, wherein each of the first linkage assembly and the second linkage assembly is provided with a recess, the rotation shaft seat is arranged in the recess, and the rotation shaft seat, the first linkage assembly and the second linkage assembly are in axial limit fit with the rotation shaft.

16. The folding mechanism of claim 1 wherein said first folded sheet includes a carrier portion and a side portion connected to one side of said carrier portion, said side portion including a first side wall, a second side wall and a third side wall, said first side wall and said second side wall being disposed opposite each other in an axial direction of said shaft, said third side wall being connected between said first side wall and said second side wall.

17. The folding mechanism of claim 16 further including a slider removably secured to a surface of said first movable cover facing said first folded sheet, at least one of said first side wall and said second side wall having a slot extending in a direction perpendicular to an axial direction of said shaft, said slider and said slot being in sliding engagement.

18. The folding mechanism of claim 17 wherein said first fold further includes an engagement portion secured to said carrier portion and located between said first side wall and said second side wall, said engagement portion being provided with said slide slot.

19. The folding mechanism of claim 16 further including a housing connected to said side portion and disposed opposite said bearing portion, said housing being in overlapping engagement with said first movable cover.

20. The folding mechanism of claim 1, wherein said pivot assembly includes a connecting seat and a plurality of support bars disposed side by side, and two adjacent support bars are rotatably connected by said connecting seat.

21. An electronic device comprising a display screen and the folding mechanism of any of claims 1-20, wherein the display screen is supported by the folding mechanism and is located on a side of the first folded sheet facing away from the first moveable cover.