CN111835895B

CN111835895B - Folding device and electronic equipment

Info

Publication number: CN111835895B
Application number: CN202010216918.5A
Authority: CN
Inventors: 洪祝平; 刘文俊; 苏帅; 凡小飞; 陈松亚
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2019-04-18
Filing date: 2020-03-25
Publication date: 2021-11-02
Anticipated expiration: 2040-03-25
Also published as: CN111833729A; CN111835895A; CN111833730A

Abstract

The invention provides a folding device which comprises a bending mechanism, a sliding piece and a falling limiting mechanism, wherein the falling limiting mechanism comprises a connecting piece for connecting the bending mechanism and the sliding piece, the sliding piece comprises a first limiting part, the bending mechanism can drive the connecting piece to move relative to the sliding piece when being bent, and when the bending mechanism is bent, the connecting piece moves towards the first limiting part relative to the sliding piece until the connecting piece abuts against or is close to the first limiting part to limit the sliding piece to move towards the bending mechanism relative to the bending mechanism. The application also provides an electronic device provided with the folding device.

Description

Folding device and electronic equipment

Technical Field

The invention relates to the field of flexible piece supporting, in particular to a folding device for supporting a flexible piece and electronic equipment provided with the folding device.

Background

With the development of display devices, a bendable ultrathin electronic display screen, i.e., a flexible member, has appeared. Compared with the traditional display device, the flexible piece has the advantages of being foldable, flexible and the like, and is widely favored by consumers. The existing flat plate type supporting structure obviously cannot meet the requirement, so the industry develops the supporting structure which can meet the bending requirement of the flexible piece. To compensate for the length difference occurring in bending, the flexible element is typically connected to the hinge by means of a sliding element. However, when the end of the flexible member is impacted by external force, the sliding component can drive the flexible member to slide relative to the hinge, so that the flexible member is arched, and the flexible member is easily damaged.

Disclosure of Invention

The application provides a folding device that flexible piece is difficult to damage, be provided with folding device's electronic equipment.

The application provides a folding device, including the mechanism of can bending, the slider and fall stop gear, fall stop gear including the connecting piece of connecting the mechanism of can bending and slider, the slider includes first spacing portion, the mechanism of can bending can drive the relative slider of connecting piece and remove when buckling, when the mechanism of can bending buckles, the relative slider of connecting piece moves until supporting to hold or be close to first spacing portion and restriction slider can bend the mechanism relatively and remove towards the mechanism of can bending.

The application further provides an electronic device, including flexible piece, casing and folding device, the casing includes first framework and second framework, folding device set up in first framework with between the second framework, the flexible piece set up in the casing reaches on the folding device, the flexible piece is followed folding device bends or the exhibition is flat.

The folding device of the electronic equipment comprises a bendable mechanism, a sliding piece and a falling limiting mechanism, wherein the leather falling limiting mechanism comprises a connecting piece for connecting the bendable mechanism and the sliding piece, the sliding piece comprises a first limiting part, and the bendable mechanism can drive the connecting piece to move relative to the sliding piece when being bent; when the bendable mechanism is bent, the connecting piece moves towards the first limiting part relative to the sliding piece until the connecting piece abuts against or is close to the first limiting part so as to limit the sliding piece to move towards the bendable mechanism relative to the bendable mechanism. In this way, the situation that the sliding part collapses on the folding device when falling can be prevented, so that the flexible screen fixedly connected with the sliding part is prevented from being arched and damaged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electronic device in an embodiment of the present application.

Fig. 2 is an exploded perspective view of the flexible member and the housing of the electronic device in fig. 1.

Fig. 3 is an enlarged schematic perspective view of a folding device of the electronic apparatus in fig. 2.

Fig. 4 is a perspective view of the folding device in fig. 3 from another perspective.

Fig. 5 is an exploded perspective view of a portion of the folding device of fig. 3.

Fig. 6 is an exploded perspective view of a portion of the folding device of fig. 4.

Figure 7 is an exploded perspective view of the central hinge and two folding assist assemblies of figure 5.

Figure 8 is a perspective view of the central hinge of figure 7 from another perspective with two folding assist assemblies.

Fig. 9 is an exploded perspective view of a central hinge joint of the hinge assembly of fig. 7.

Fig. 10 is an exploded perspective view from another perspective of a central hinge joint of the hinge assembly of fig. 9.

Fig. 11 is an exploded perspective view of the first joint of fig. 5.

Fig. 12 is a perspective view from another perspective of the first joint hinge of fig. 11.

Fig. 13 is an exploded perspective view of the second connecting hinge of fig. 6.

Fig. 14 is a perspective view from another perspective of the second joint of fig. 13.

FIG. 15 is an enlarged perspective view of one of the folding assemblies of FIG. 7.

FIG. 16 is a perspective view of the folding assist assembly of FIG. 15 from another perspective.

FIG. 17 is an exploded perspective view of the folding assist assembly of FIG. 15.

FIG. 18 is an exploded perspective view of the folding assist assembly of FIG. 16.

Fig. 19 is an exploded perspective view of the shutter mechanism of the folding device of fig. 4.

Fig. 20 is a schematic view of an end structure of the folding device in fig. 3.

Fig. 21 is a front view of the folding device of fig. 3.

Fig. 22 is a sectional view taken along line XXI-XXI in fig. 3.

Fig. 23 is a sectional view taken along line XXII-XXII in fig. 3.

Fig. 24 is a sectional view taken along line XXIII-XXIII in fig. 3.

Fig. 25 is a sectional view taken along line XXIV-XXIV in fig. 3.

Fig. 26 is a sectional view taken along line XXV-XXV in fig. 3.

Fig. 27 is a perspective view of the electronic apparatus in fig. 1 in a bent state.

Fig. 28 is a perspective view of the folding device of the electronic apparatus according to the present application in a folded state.

Fig. 29 is a schematic view of the front side of the folding device of fig. 28.

Fig. 30 is a schematic view of an end construction of the folding device of fig. 28.

Fig. 31 is a sectional view taken along line XXIX-XXIX in fig. 28.

FIG. 32 is a cross-sectional view taken along line XXX-XXX in FIG. 28.

FIG. 33 is a cross-sectional view taken along line XXXI-XXXI in FIG. 28.

FIG. 34 is a cross-sectional view taken along line XXXII-XXXII in FIG. 28.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the application and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the application.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed at … …" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to fig. 6, an electronic device 100 according to an embodiment of the invention includes a housing 20 and a flexible element 30 disposed on the housing 20. The housing 20 includes a first frame 21, a second frame 23, and a folding device 22 connected between the first frame 21 and the second frame 23. The flexible material 30 is provided on the front surfaces of the first frame 21, the second frame 23, and the folding device 22. The flexible element 30 is provided with a bendable region 31 corresponding to the folding means 22 and two non-bendable regions 33 connected to opposite sides of the bendable region 31. The folding device 22 is used to support the bendable region 31 of the flexible member 30, and the flexible member 30 is bent or flattened with the folding device 22. The folding device 22 comprises a folding mechanism 25, two folding-assist assemblies 24 and a shielding mechanism 29, wherein the two folding-assist assemblies 24 are arranged at two opposite ends of the folding mechanism 25. The bending mechanism 25 comprises a middle hinge joint 250, connecting hinge joints rotatably connected to two opposite sides of the middle hinge joint 250, a falling limiting mechanism 258 and a sliding member 259; the fall-limiting mechanism 258 includes a connecting member connecting the bendable mechanism 25 and the sliding member 259, the sliding member 259 includes a first limiting portion 2595 (as shown in fig. 11), the bendable mechanism 25 can drive the connecting member to move relative to the sliding member 259 when bending, and when the bendable mechanism 25 bends, the connecting member moves towards the first limiting portion 2595 relative to the sliding member 259 until the connecting member abuts against or approaches the first limiting portion 2595 to limit the sliding member 259 from moving towards the bendable mechanism 25 relative to the bendable mechanism 25.

Each folding-assist assembly 24 includes a transmission mechanism 26, a connecting mechanism 27, and a linkage mechanism 28. The shielding mechanism 29 includes two first shielding mechanisms 290 provided at opposite ends of the bendable mechanism 25, and a second shielding mechanism 295 provided at the back of the bendable mechanism 25. The transmission mechanism 26 is connected to the middle hinge joint 250 and the connecting hinge joint, and is used for driving the connecting hinge joint to move relative to the middle hinge joint 250. Specifically, the connecting hinge includes a first connecting hinge 254 and a second connecting hinge 257, the first connecting hinge 254 and the second connecting hinge 257 are movably disposed on two opposite sides of the middle hinge 250, and the transmission mechanism 26 is connected to the middle hinge 250 and the first connecting hinge 254 and the second connecting hinge 257; the transmission mechanism 26 is used to drive the first connecting hinge 254 and the second connecting hinge 257 to move relative to the middle hinge 250, so as to bend or unfold the bendable mechanism 25, thereby bending or unfolding the electronic device 100.

In this embodiment, the front surface refers to a surface facing the same direction as the light emitting surface of the flexible screen, and the back surface refers to a surface facing away from the light emitting surface of the flexible screen. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a vehicle-mounted display, and any other products and components with display functions. "connected" in the description of the embodiments of the present invention includes both direct connection and indirect connection, for example, a connection of a and B includes a connection of a and B directly or through a third element C or more other elements. The connection also includes both the case of integral connection and the case of non-integral connection, the integral connection means that A and B are integrally formed and connected, and the non-integral connection means that A and B are non-integrally formed and connected.

The folding device 22 of the electronic device 100 of the present invention comprises a bending mechanism 25, a sliding member 259 and a falling limiting mechanism 258, wherein the falling limiting mechanism 258 comprises a connecting member connecting the bending mechanism 25 and the sliding member 259, the sliding member 259 comprises a first limiting portion 2595, and the bending mechanism 25 can drive the connecting member to move relative to the sliding member 259 when bending; when the bendable mechanism 25 bends, the connecting member moves toward the first position-limiting portion 2595 relative to the sliding member 259 until the connecting member abuts against or approaches the first position-limiting portion 2595 to limit the movement of the sliding member 259 relative to the bendable mechanism 25 toward the bendable mechanism 25. In this way, it is possible to prevent the sliding member 259 from collapsing on the bendable mechanism 25 when the flexible screen is dropped, so as to prevent the flexible screen fixedly connected to the sliding member 259 from being arched and damaged.

The linkage mechanism 28 is connected to the transmission mechanism 26, and when the connecting hinge joint on one side rotates, the transmission mechanism 26 on the same side is driven to rotate, and the transmission mechanism 26 drives the transmission mechanism 26 on the other side to rotate through the linkage mechanism 28, and then drives the connecting hinge joint on the other side to rotate. Specifically, when the first connecting hinge 254 rotates, the transmission mechanism 26 on the same side is driven to rotate, the transmission mechanism 26 drives the transmission mechanism 26 on the other side to rotate through the linkage mechanism 28, and the transmission mechanism 26 on the other side drives the second connecting hinge 257 to rotate; when the second connecting hinge 257 rotates, the transmission mechanism 26 on the same side is driven to rotate, the transmission mechanism 26 drives the transmission mechanism 26 on the other side to rotate through the folding device 22, and the transmission mechanism 26 on the other side drives the first connecting hinge 254 to rotate, so that the linkage of the bendable mechanism 25 is realized.

Preferably, articulation of the articulation joint relative to the central joint 250 includes rotation relative to the central joint 250 and sliding relative to the central joint 250, i.e., the articulation joint rotates relative to the central joint 250 while sliding relative to the central joint 250. Specifically, the first connecting hinge 254 slides relative to the middle hinge 250 while rotating relative to the middle hinge 250; the second connecting hinge 257 rotates with respect to the middle hinge 250 while sliding with respect to the middle hinge 250.

The connecting mechanism 27 is connected between the middle hinge joint 250 and the connecting hinge joint, and the connecting mechanism 27 slides relative to the connecting hinge joint when the connecting hinge joint moves relative to the middle hinge joint; specifically, the connecting mechanism 27 is connected between the central hinge joint 250 and the first and second connecting

hinge joints

254, 257, and the connecting mechanism 27 slides relative to the first and/or second connecting

hinge joints

254, 257 as the first and/or second connecting

hinge joints

254, 257 move relative to the central hinge joint 250.

The two bending-assisting assemblies 24 are respectively connected to two opposite ends of the back of the middle hinge joint 250 through a plurality of screws, the length of the middle hinge joint 250 along the bending axis direction of the bending mechanism 25 is similar to the length of the first connecting hinge joint 254 and the second connecting hinge joint 257 along the bending axis direction of the bending mechanism 25, the middle part of a first shielding mechanism 290 of each bending-assisting assembly 24 is connected to the end part of the middle hinge joint 250, two opposite ends of the first shielding mechanism 290 are respectively connected to the end parts of the first connecting hinge joint 254 and the second connecting hinge joint 257, and the first shielding mechanism 290 bends or unfolds along with the bending mechanism 25. The drive mechanism 26 of each of the folding assist assemblies 24 includes drive links 260 on opposite sides, the ends of the two drive links 260 remote from the central hinge joint 250 being movably connected to the first and second connecting

hinge joints

254 and 257, respectively. Each of the folding assist assemblies 24 includes guide rails on opposite sides thereof, with the ends of the guide rails remote from the central hinge joint 250 slidably connected to the first and second connecting

hinge joints

254 and 257, respectively.

As shown in fig. 7 to 10, the middle hinge 250 includes a middle hinge 251, and two rotational hinges at opposite sides of the middle hinge 251; in particular, the two swivel joints include a first swivel joint 252 on the left side of the intermediate joint 251 and a second swivel joint 253 on the right side of the intermediate joint 251. The middle hinge 251 is in a strip shape and comprises a front face with a circular arc-shaped cross section, a reinforcing strip 2510 is convexly arranged in the middle of the back face of the middle hinge 251, connecting columns 2512 are respectively arranged at two opposite ends of the reinforcing strip 2510 on the back face of the middle hinge 251, and each connecting column 2512 is axially provided with a connecting hole. Two countersunk holes 2514 are respectively arranged at intervals at two opposite ends of the front surface of the middle hinge joint 251, and each countersunk hole 2514 penetrates through the back surface of the middle hinge joint 251; one of the counter bores 2514 at the same end is adjacent the end, and the other counter bore 2514 is adjacent the corresponding connecting column 2512. Two counter-sunk holes 2514 at opposite ends of the intermediate hinge 251 are used to connect the two folding-assist assemblies 24, respectively.

The first rotating hinge 252 and the second rotating hinge 253 have the same structure, and only the first rotating hinge 252 is described in detail herein, the first rotating hinge 252 is a strip-shaped structure, and includes a front surface with a circular arc cross section, a reinforcing bar 2520 is convexly disposed at the middle of the back surface of the first rotating hinge 252, first arc-shaped guide plates 2522 are respectively disposed at two opposite ends of the reinforcing bar 2520 on the back surface of the first rotating hinge 252, and each first arc-shaped guide plate 2522 is bent toward the side away from the middle hinge 251; the back of the first rotating hinge 252 is provided with a second arc guide 2524 adjacent to each first arc guide 2522, each second arc guide 2524 is bent toward one side of the intermediate hinge 251, and the two first arc guides 2522 are located between the two second arc guides 2524. Two opposite ends of the back of the first rotating hinge 252 are respectively provided with a positioning block 2526 in a protruding manner, and the positioning block 2526 is provided with a connecting hole 2527. The second rotating hinge 253 includes a reinforcing bar 2530 positioned at the middle of the rear surface, first arc-shaped guide plates 2532 positioned at opposite ends of the reinforcing bar 2530, a second arc-shaped guide plate 2534 adjacent to each first arc-shaped guide plate 2532, and positioning blocks 2536 positioned at opposite ends; each of the positioning blocks 2536 is provided with a coupling hole 2537.

As shown in fig. 11 and 12, the first connecting hinge 254 includes a mounting frame 255 connected to the middle hinge 250, a connecting frame 256 slidably connected to the mounting frame 255, two sliding members 259, and two fall restraint mechanisms 258. The mounting frame 255 includes a bar-shaped mounting plate 2551, and the mounting plate 2551 includes a first plate 25511 located at the middle portion and second plates 25512 fixedly connected to opposite ends of the first plate 25511. One end of the second plate 25512 facing the first plate 25511 is provided with a positioning groove, and the end of the first plate 25511 is received in the positioning groove and fixed by a locking member. The two ends of the mounting plate 2551 opposite to the side facing away from the middle hinge joint 250 respectively extend outward vertically to form a lug 2555, i.e., the end of each second plate 25512 away from the first plate 25511 extends outward vertically to form the lug 2555. The side of the first plate 25511 facing away from the lug 2555 is provided with two tabs 25516. The opposite ends of the first connecting hinge 254 are provided with fixing grooves 25518, respectively.

A first slide guide groove 2556 for accommodating the falling limiting mechanism 258 is formed in the back surface of each lug 2555 along the extending direction of the lug, and two opposite ends of the first slide guide groove 2556 penetrate through the second plate 25512 and the lug 2555 respectively; the connecting hinge has a through slot 2557, and specifically, the front surface of the lug 2555 has the through slot 2557 penetrating through the first guiding and sliding slot 2556, so that the lug 2555 has a stop strip 2558 at one end of the through slot 2557 far from the second plate 25512. The bending mechanism 25 comprises a second limiting part 2559 arranged on the connecting hinge joint, and the second limiting part 2559 is formed on the inner wall of the through groove 2557; specifically, a second position-limiting portion 2559 is disposed at an end adjacent to the second plate 25512, and the fall-limiting mechanism 258 is disposed between the stop bar 2558 and the second position-limiting portion 2559. The stop bar 2558 is provided with a first limiting surface 25581 facing the second limiting portion 2559, the second limiting portion 2559 comprises an inclined second limiting surface 25591, and the first limiting surface 25581 is inclined relative to the second limiting surface 25591. Specifically, the second position-limiting portion 2559 is an extending piece extending from the second plate body 25512 to the through groove 2557, the through groove 2557 defines a receiving groove 25593 on one side of the second position-limiting portion 2559, the second position-limiting surface 25591 is disposed at one end of the extending piece away from the second plate body 25512, the second position-limiting surface 25591 deviates from the receiving groove 25593, and one end of the second position-limiting surface 25591 adjacent to the receiving groove 25593 is in arc transition.

Two pairs of spaced accommodating grooves 2552 are formed between the two lugs 2555 on the side of the mounting plate 2551 facing the connecting frame 256, each accommodating groove 2552 penetrates through the side of the mounting plate 2551 where the lug 2555 is arranged, and a first elastic member 2553 is arranged in each accommodating groove 2552. Specifically, a pair of receiving grooves 2552 are respectively formed at two opposite ends of the front surface of the first plate 25511, and each of the first elastic members 2553 is a spring. A strip-shaped groove 2554 is formed in the front surface of the mounting plate 2551 between each pair of receiving grooves 2552, the strip-shaped groove 2554 extends along the length direction perpendicular to the mounting plate 2551 and penetrates through the side surface of the mounting plate 2551 where the lugs 2555 are arranged; two opposite ends of the back surface of the mounting plate 2551 are provided with two stepped holes 25510, and the two stepped holes 25510 penetrate through the two strip-shaped grooves 2554; each stepped hole 25510 has a bar shape, and in particular, each stepped hole 25510 extends in a length direction of the bar-shaped groove 2554. The mounting plate 2551 is provided with second elastic members 25515 on two opposite sides of each lug 2555, specifically, the mounting plate 2551 is provided with positioning pillars protruding from two opposite sides of each lug 2555, each positioning pillar is sleeved with a second elastic member 25515, and each second elastic member 25515 is a spring.

As shown in fig. 12, mounting grooves 2550 are formed at two ends of the back surface of the mounting plate 2551 at positions adjacent to each lug 2555 along the length direction of the mounting plate 2551, and each mounting groove 2550 is adjacent to one end of the corresponding first guide groove 2556 and is communicated with the first guide groove 2556; the mounting plate 2551 is provided with a through hole 25501 in the bottom wall of the mounting groove 2550. A positioning mechanism 2576 is disposed in the first connecting hinge 254, and the positioning mechanism 2576 is used for positioning the bendable mechanism 25 in the flat state or the bent state. Specifically, the positioning mechanism 2576 includes a positioning member 25760 slidably disposed in the mounting groove 2550 and an elastic member 25765 elastically pushing against the positioning member 25760. A clamping block 25761 with an arc-shaped peripheral surface is arranged at one end of the positioning piece 25760, and two opposite ends of one side of the positioning piece 25760 departing from the clamping block 25761 are respectively provided with a connecting rod 25766 in a protruding manner. The positioning member 25760 has a strip-shaped guide-slide slot 25764 between the latch 25761 and the connecting rod 25766, and the guide-slide slot 25764 extends along the length direction of the mounting plate 2551 and penetrates the front and back of the positioning member 25760. The positioning element 25760 is slidably received in the mounting groove 2550, the two elastic elements 25765 are respectively sleeved on the two connecting rods 25766 and connected to the inner wall of the mounting groove 2550, and the elastic element 25765 can push the positioning element 25760 to slide along the mounting groove 2550, so that the fixture block 25761 can be inserted into the corresponding first sliding guide groove 2556. In this embodiment, the elastic member 25765 is a spring sleeved on the connecting rod 25766, one end of the spring is sleeved on the connecting rod 25766, and the opposite end of the spring abuts against the inner wall of the mounting groove 2550. The positioning mechanism 2576 further includes a cover plate 25768 and a locking member that is locked to the first connecting hinge 254 through the through hole of the cover plate 25768, such that the positioning member 25760 is slidably received in the mounting groove 2550.

The back of the mounting plate 2551 is provided with a drive slot 25514 adjacent to each lug 2555, the drive slot 25514 is an arc-shaped slot, and the drive slot 25514 extends through the side of the mounting plate 2551 facing away from the lug 2555. The transmission groove 25514 extends in a direction perpendicular to the length direction of the mounting plate 2551, and the bottom surface of the transmission groove 25514 is an arc-shaped surface which is curved toward the front surface of the mounting plate 2551, that is, the depth direction of the transmission groove 25514 is the thickness direction of the mounting plate 2551. In this embodiment, a driving groove 25514 is formed on the back surface of each second plate 25512 adjacent to the lug 2555. Each second plate 25512 is provided with a recess around the transmission groove 25514, and the recess is used for fixing the cover plate 25513; the side surface of the cover plate 25513 facing the mounting plate 2551 is provided with a bump 25517 corresponding to the transmission groove 25514, and the bump 25517 is provided with an arc-shaped outer peripheral surface; when the cover 25513 is received in the recess, the protrusion 25517 is received in the transmission groove 25514, such that the outer circumferential surface of the protrusion 2551 and the arc-shaped surface of the transmission groove 25514 form an arc-shaped groove.

Each lug 2555 is slidably received by a slide 259, and a drop limiting mechanism 258 is movably received in the channel 2557 of each lug 2555. Specifically, the front surface of the sliding member 259 is provided with a guide slot 2591, and the lug 2555 can be slidably inserted into the guide slot 2591; the sliding member 259 is provided with a connecting post 2593 protruding towards the guiding slot 2591 corresponding to the through slot 2557 of the lug 2555, and the connecting post 2593 is provided with a connecting hole 2594 axially. The through groove 2557 of the sliding member 259 corresponding to the lug 2555 is provided with a first position-limiting portion 2595 facing the guiding groove 2591, the connecting column 2593 is located at an end portion adjacent to one side of the mounting plate 2551, and the first position-limiting portion 2595 is located at one side far away from the connecting column 2593. The connection of the fall restraint 258 includes a connection mechanism 27, a link 2580 connecting the connection mechanism 27 to the slider 256, and a connection 2585, the connection mechanism 27 being pivotally connected to the central hinge joint 250. The connecting rod 2580 can be accommodated in the through groove 2557, and the connecting rod 2580 comprises a first connecting rod 2581 and a second connecting rod 2582; the first connecting rod 2581 and the second connecting rod 2582 are both rectangular pieces, and two opposite end faces are provided with circular arc shapes; two opposite ends of the first connecting rod 2581 and the second connecting rod 2582 are respectively provided with a through hole 2583, and the connecting rod 2585 is inserted into the through hole 2583 at the second end of the first connecting rod 2581 and the through hole 2583 at the second end of the second connecting rod 2582, so that the first connecting rod 2581 and the second connecting rod 2582 are rotatably connected; the first end of the first link 2581 is adapted to be rotatably coupled to the coupling mechanism 27, and the through hole 2583 of the first end of the second link 2583 is adapted to be rotatably coupled to the connection post 2573 of the slider 259. A stopper 2586 is protruded from a middle portion of one side of the first link 2581, and the stopper 2586 increases a thickness of the second stopper surface 25591 of the first link 2581 contacting the second stopper portion 2559.

The connecting frame 256 includes a strip-shaped connecting plate 2561 and a connecting piece 2563 disposed on a side of the connecting plate 2561 facing away from the middle hinge joint 250. The connecting pieces 2563 extend in a direction perpendicular to the length direction of the connecting plates 2561, and the connecting pieces 2563 extend for a length shorter than the length of the connecting plates 2561. The connecting plate 2561 is provided with four connecting columns 2575, the four connecting columns 2575 are arranged along the length direction of the connecting plate 2561, the connecting columns 2565 at the two ends respectively correspond to the through holes 25501 at the two opposite ends of the mounting plate 2551, the two connecting columns 2565 in the middle respectively correspond to the stepped holes 25510 of the mounting plate 2551, the two opposite ends of the connecting piece 2563 are respectively connected to the two connecting columns 2565 in the middle through reinforcing ribs, and therefore the strength of the connecting piece 2563 is enhanced. Each connecting column 2565 is axially provided with a connecting hole 2567.

Referring to fig. 5, 6 and 12-13, when the first connecting hinge 254 is assembled, the connecting rod 25766 of each positioning member 25760 is inserted into the elastic member 25765 and then installed in the installation groove 2550 of the installation frame 255, so that the guiding groove 25764 of the positioning member 25760 faces the through hole 25501; the positioning element 25760 can slide along the guiding slot 25764, the elastic element 25765 elastically abuts between the positioning element 25760 and the inner wall of the mounting slot 2550, and the elastic element 25765 abuts against the positioning element 25760 to slide along the guiding slot 25764, so that the clamping block 25761 extends into the corresponding first guiding slot 2556; the two connecting rods 2580 are respectively received in the guiding slots 2591 of the two sliding members 259, such that the through hole 2583 of the second connecting rod 2582 of each connecting rod 2580 faces the corresponding connecting post 2593, and the locking member is inserted into the through hole 2583 and the connecting hole 2594 to rotatably connect the first end of the second connecting rod 2582 to the sliding member 259. The sliding member 259 is connected with the bendable mechanism 25 through a spring member, and when the bendable mechanism 25 bends, the sliding member 259 slides relative to the bendable mechanism 25 to compress the elastic member; specifically, the second elastic members 25515 are respectively sleeved on positioning columns of the mounting plate 2551; the two sliding members 259 are respectively sleeved on the two lugs 2555 of the mounting frame 255, such that the sliding members 259 are connected to the mounting frame 255 through the second elastic member 25515, the second connecting rod 2582 of each connecting rod 2580 is received in the receiving groove 25593, and the first connecting rod 2581 is adjacent to the second position-limiting surface 25591 of the second position-limiting portion 2559. At this time, each sliding member 259 is sleeved on the corresponding lug 2555 and connected to the corresponding two second elastic members 25515. Covering the connecting frame 256 on the mounting frame 255, enabling four connecting columns 2566 of the connecting frame 256 to be respectively and slidably inserted into two strip-shaped grooves 2554 and two through holes 25501 of the mounting frame 255, enabling connecting sheets 2563 of the connecting frame 256 to abut against first elastic pieces 2553 on the mounting frame 255, enabling connecting plates 2561 of the connecting frame 256 to be covered on the mounting frame 255, enabling two locking pieces to be respectively inserted into stepped holes 25510 in the back surface of the mounting frame 255 and connected to connecting holes 2567 of the connecting columns 2566, and enabling the connecting frame 256 to slide relative to the mounting frame 255 along the stepped holes; the two locking members are inserted into the sliding guide slots 25764 of the cover 25768 and the positioning member 25760 and connected to the corresponding connecting holes 2567 of the connecting frame 256. At this time, the first elastic member 2553 is elastically clamped between the connecting piece 2563 and the mounting frame 255, each connecting column 2565 can slide along the corresponding strip-shaped groove 25510, and the two sliding members 259 can slide relative to the mounting frame 255; the two links 2580 can rotate within the corresponding through slots 2557.

Referring to fig. 13 and 14, the second connecting hinge 257 includes a bar-shaped connecting plate 2571, and the connecting plate 2571 includes a first plate 2572 located at the middle portion and second plates 2574 fixedly connected to opposite ends of the first plate 2572; the first plate 2572 and the second plate 2574 are connected in a clamping block and clamping groove mode; the first plate 2572 and the second plate 2574 can also be fixedly connected by screwing or gluing. In this embodiment, a positioning groove is disposed at an end of each second plate 2574 facing the first plate 2572, and an end of the first plate 2572 is received in the positioning groove and fixed by a locking member. The two ends of the second connecting hinge 257 opposite to the side facing away from the middle hinge 250 are respectively provided with a lug 2575, and specifically, one end of each second plate 2574 facing away from the first plate 2572 is provided with the lug 2575. The side of the first plate 2572 facing away from the lug 2575 is provided with two tabs 25723. Two opposite ends of the second connecting hinge joint 257 are respectively provided with a fixing block 25725, and the fixing block 25725 is provided with a connecting hole.

Two opposite ends of one side of the connecting plate 2571 facing the middle hinge joint 250 are respectively provided with a second sliding chute 2570 at intervals, and the second sliding chute 2570 extends along the length direction perpendicular to the connecting plate 2571. The back surface of the connecting plate 2571 is provided with a mounting groove 2573 adjacent to each second sliding groove 2570, one end of each mounting groove 2573 adjacent to the corresponding second sliding groove 2570 is communicated with the second sliding groove 2570, the connecting plate 2571 is provided with a positioning pillar 25730 protruding towards each mounting groove 2573, and each positioning pillar 25730 is provided with a connecting hole 25732 along the axial direction. A positioning mechanism 2576 is also provided in the second connecting hinge 257, the positioning mechanism 2576 being used to position the bendable mechanism 25 in the flat or bent state. Specifically, the positioning mechanism 2576 includes a positioning member 25760 slidably received in the mounting groove 2573 and an elastic member 25765 elastically pushing the positioning member 25760; a clamping block 25761 with an arc-shaped peripheral surface is arranged at one end of the positioning piece 25760, and two opposite ends of one side of the positioning piece 25760 departing from the clamping block 25761 are respectively provided with a connecting rod 25766 in a protruding manner. The positioning member 25760 has a strip-shaped guide-slide slot 25764 between the latch 25761 and the connecting rod 25766, and the guide-slide slot 25764 extends along the length direction of the mounting plate 2571 and penetrates the front and back of the positioning member 25760. The positioning member 25760 is slidably received in the mounting groove 2573, the two elastic members 25765 are respectively sleeved on the two connecting rods 25766 and connected to the inner wall of the mounting groove 2573, and the elastic member 25765 can push the positioning member 25760 to slide along the mounting groove 2573, so that the fixture block 25761 can be inserted into the corresponding second sliding guide groove 2570.

The back of the connecting plate 2571 is provided with a drive slot 2577 adjacent to each lug 2575, the drive slot 2577 being an arcuate slot, the drive slot 2577 extending through the side of the connecting plate 2571 facing away from the lug 2575. The transmission groove 2577 extends in a direction perpendicular to the length direction of the connection plate 2571, and the bottom surface of the transmission groove 2577 is an arc-shaped surface which is curved toward the front surface of the connection plate 2571, that is, the depth direction of the transmission groove 2577 is the thickness direction of the connection plate 2571. In this embodiment, a drive slot 2577 is formed in the back surface of each second plate 2574 adjacent to the lug 2575. Each second plate 2574 is provided with a recess around the transmission groove 2577, and the recess is used for fixing the cover plate 2578; the side surface of the cover plate 2578 facing the connecting plate 2571 is provided with a bump 25780 corresponding to the transmission groove 2577, and the bump 25780 is provided with an arc-shaped outer peripheral surface; when the cover plate 2578 is accommodated in the recess, the bump 25780 is accommodated in the transmission groove 2577, so that the outer circumferential surface of the bump 25780 and the arc-shaped surface of the transmission groove 2577 form an arc-shaped groove.

Referring to fig. 5, fig. 6, and fig. 13-fig. 14, when the second connecting hinge 257 is assembled, the connecting rod 25766 of each positioning member 25760 is inserted into the elastic member 25765 and then installed in the installation groove 2573 of the connecting plate 2571, so that the positioning post 25730 in the installation groove 2573 is inserted into the guiding groove 25764 of the positioning member 25760, the positioning member 25760 can slide along the guiding groove 25764, the elastic member 25765 elastically abuts between the positioning member 25760 and the inner wall of the installation groove 2573, and the elastic member 25765 abuts against the positioning member 25760 and slides along the guiding groove 25764, so that the fixture block 25761 extends into the corresponding second sliding groove 2570.

Referring to fig. 15 to 18, the transmission mechanism 26 includes transmission members 262 disposed on opposite sides of the folding-assist assembly 24 and a first connecting frame 264, and the first connecting frame 264 is used for connecting the two transmission members 262 to the folding-assist assembly 24. Each driving member 262 is L-shaped, and includes a bar-shaped driving rod 2621, a sliding guide rod 2623 disposed at one end of the driving rod 2621, and a connecting cylinder 2624 disposed at the other end of the driving rod 2621, wherein the sliding guide rod 2623 is perpendicular to the length direction of the driving rod 2621. The end face of the transmission rod 2621, at which the slide guide rod 2623 is arranged, is arranged in an arc, and the slide guide rod 2623 is a round rod. The axial direction perpendicular to transfer line 2621 of connecting tube 2624, the terminal surface that connecting tube 2624 deviates from transfer line 2621 is established to the arc surface, and the inner chamber cross section of connecting tube 2624 is kidney-shaped, and the one end that connecting tube 2624 deviates from lead slide bar 2623 is equipped with breach 2625, and the angle that breach 2625 corresponds the central angle of connecting tube 2624 is greater than 180 degrees. The first connecting frame 264 includes a connecting piece 2641 and a strap 2645 disposed at a middle portion of one side of the connecting piece 2641, wherein the strap 2645 is perpendicular to the connecting piece 2641. The two opposite ends of the connecting piece 2641 are respectively provided with a rotating hole 2642, and the two opposite end surfaces of the connecting piece 2641 are respectively provided with arc surfaces; the connecting piece 2641 has a through hole 2643 at its middle. The connecting portion 2641 is connected to the connecting piece 2645 at a middle portion of the connecting piece 2645.

The connecting mechanism 27 comprises a guide rail block and a guide rail rod connected to the guide rail block, specifically, the guide rail block comprises a first guide rail block 271, a second guide rail block 272 and a third guide rail block 274 positioned between the first guide rail block 271 and the second guide rail block 272; the rail bars include a first rail bar 275 rotatably connected between the first rail block 271 and the third rail block 274, and a second rail bar 277 rotatably connected to the second rail block 272 and the third rail block 274. The first guide rail bar 275 and the second guide rail bar 277 are rotatably connected to the guide rail block through different virtual shafts, respectively; specifically, the first rail bar 275 rotates along a first virtual axis L1, and the second rail bar 277 rotates along a second virtual axis L2.

The first guide rail block 271 has a generally circular arc-shaped front face 2710, a first rotating cavity 2711 is arranged at one end of the back face of the first guide rail block 271, which is close to the third guide rail block 274, a first guide rail curved surface 2712 is arranged at the bottom face of the first rotating cavity 2711 of the first guide rail block 271, a circular arc-shaped first guide groove 2714 is arranged at one end of the first guide rail curved surface 2712, which is far away from the third guide rail block 274, of the first guide rail block 271, and the axial lines of the first guide rail curved surface 2712 and the first guide groove 2714 are collinear. The first guide rail block 271 is provided with a notch 2715 at one side of the first rotating cavity 2711, the first guide rail block 271 is provided with a strip-shaped through groove 27160 at one side of the first rotating cavity 2711 far away from the notch 2715, the through groove 27160 is communicated with the first rotating cavity 2711, and the through groove 27160 extends to a position near the notch 2715 along the circumferential direction of the first guide rail curved surface 2712. An elastic first clamping matching part 2716 is arranged in the through groove 27160, the first clamping matching part 2716 is an arc-shaped piece, and the arc-shaped piece extends from one end, far away from the notch 2715, of the through groove 27160 along the through groove 27160. The end of the first clamping matching part 2716 is provided with a clamping strip 27162 protruding into the first rotating cavity 2711, the clamping strip 27162 extends along the width direction of the first clamping matching part 2716, and the outer peripheral surface of the clamping strip 27162 is a circular arc surface. Two opposite sides of one end of the first guide rail block 271, which faces away from the first rotating cavity 2711, are respectively provided with a connecting hole 2717 along the axial direction of the first guide rail curved surface 2712, the connecting hole 2717 on the same side with the notch 2715 extends to a position adjacent to the first guide groove 2714, and the connecting hole 2717 on the other opposite side penetrates through the first guide rail block 271. Notches 2718 are respectively formed in two opposite sides of one end, away from the first rotating cavity 2711, of the first guide rail block 271, and the angle of the central angle of a connecting hole 2717 corresponding to each notch 2718 is larger than 180 degrees. A positioning hole 2719 is formed in the middle of one end, away from the first rotating cavity 2711, of the first guide rail block 271.

The second rail block 272 is fixedly connected to the first shutter mechanism 290, and the structure of the second rail block 272 is similar to that of the first rail block 271; specifically, the second guide rail block 272 has a front surface 2720 that is generally circular arc shaped, one end of the back surface of the second guide rail block 272 that is close to the third guide rail block 274 is provided with a second rotation cavity 2721, the bottom surface of the second rotation cavity 2721 of the second guide rail block 272 is a second guide rail curved surface 2722, one end of the second guide rail block 272 that is far away from the third guide rail block 274 is provided with a circular arc shaped second guide groove 2724, and the axis lines of the second guide rail curved surface 2722 and the second guide groove 2724 are collinear. A notch 2725 is formed in one side of the second rotating cavity 2721 of the second guide rail block 272, a strip-shaped through groove 27260 is formed in one side, away from the notch 2725, of the second rotating cavity 2712 of the second guide rail block 272, the through groove 27260 is communicated with the second rotating cavity 2721, and the through groove 27260 extends to a position adjacent to the notch 2725 along the circumferential direction of the second guide rail curved surface 2722. Through the interior elastic second joint cooperation portion 2726 that is equipped with of groove 27260, second joint cooperation portion 2726 are the arc piece, the arc piece certainly lead to groove 27260 and keep away from the one end of breach 2725 and follow lead to groove 27260 extends. A mating groove 27262 is formed between an end of the second snap-fit portion 2726 and an inner surface of the through groove 27260 adjacent to an end of the notch 2725, and the mating groove 27262 extends in an axial direction of the second rail curved surface 2722. A connecting hole 2727 is formed in one side, far away from the notch 2725, of the second guide rail block 272 in the axial direction of the second guide rail curved surface 2712. A positioning hole 2729 is formed in the middle of one end, away from the second rotating cavity 2721, of the second guide rail block 272; one end of the second rail block 272 having a positioning hole 2729 is fixedly connected to the first shielding mechanism 290.

The third track block 274 includes a front face 2740 having a generally circular arc shape, a back face facing away from the front face 2740, and opposing side faces 2741. A side surface 2741 facing the first rail block 271 is provided with a guide groove 2743 and a positioning column 2744, the positioning column 2744 corresponds to a connecting hole 2717 on the side of the first rail block 271 away from the notch 2715, when the positioning column 2744 is inserted into the connecting hole 2717 to connect the third rail block 274 to the first rail block 271, the guide groove 2743 corresponds to the first guide groove 2714 of the first rail block 271, namely, the axis of the guide groove 2743 is collinear with the axis of the first guide groove 2714; a side surface 2741 facing the second guide rail block 272 is provided with a guide groove 2746 and a positioning column 2747, the positioning column 2747 corresponds to a connecting hole 2727 on a side of the second guide rail block 274 away from the notch 2725, when the positioning column 2747 is inserted into the connecting hole 2727 so that the third guide rail block 274 is connected to the second guide rail block 272, the guide groove 2746 corresponds to the second guide groove 2724 of the second guide rail block 272, that is, the axial leads of the guide groove 2746 and the second guide groove 2724 are collinear. The axis of the channel 2743 is spaced parallel to the axis of the channel 2746.

One end of the first guide rail bar 275 is provided with a first guide rail mating surface 2751, the first guide rail mating surface 2751 is a circular arc surface corresponding to the first guide rail curved surface 2712 of the first guide rail block 271, that is, when the first guide rail bar 275 is connected to the first guide rail block 271, the first guide rail mating surface 2751 slidably fits the first guide rail curved surface 2712, the first guide rail mating surface 2751 rotates along the track of the first guide rail curved surface 2712, at this time, the axial lines of the first guide rail mating surface 2751 and the first guide rail curved surface 2712 are collinear, and the first guide rail bar 275 rotates along the first virtual axis L1 relative to the first guide rail block 271. The first rail bar 275 has first slide rails 2753 at two opposite ends of the first rail mating surface 2751 along the first rail mating surface 2751, and the two first slide rails 2753 respectively correspond to the first guide groove 2714 of the first rail block 271 and the guide groove 2743 of the third rail block 274. The first guide rail bar 275 is provided with a first clamping part 2752 at the middle part of the first guide rail matching surface 2751 adjacent to the front side of the first guide rail bar 275; preferably, the first snap portion 2752 is a strip-shaped snap point extending in the axial direction of the first rail mating surface 2751. The front surface of the first rail bar 275 is provided with a clearance groove 2754 adjacent to the first rail 2753. Two fixing holes 2755 are formed in the back of the first rail bar 275 adjacent to the clearance groove 2754. An end of the first rail bar 275 remote from the first rail engagement surface 2751 extends along a length of the first rail bar 275 with an extension piece 2756, and a connection hole 2757 is provided at a distal end of the extension piece 2756. At least one positioning opening 2758 is formed in the side of the first rail bar 275 facing away from the first rail block 271 and adjacent to the extension piece 2756.

The structure of the second guide rail rod 277 is similar to that of the first guide rail rod 275, specifically, one end of the second guide rail rod 277 is provided with a second guide rail matching surface 2771, the second guide rail matching surface 2771 is an arc surface corresponding to the second guide rail curved surface 2722 of the second guide rail block 272, that is, when the second guide rail rod 277 is connected to the second guide rail block 272, the second guide rail matching surface 2771 slidably fits to the second guide rail curved surface 2722, the second guide rail matching surface 2771 rotates along the trajectory of the second guide rail curved surface 2722, at this time, the axis lines of the second guide rail matching surface 2771 and the second guide rail curved surface 2722 are collinear, and the second guide rail rod 277 rotates relative to the second guide rail block 272 along the second virtual axis L2. The second rail bar 277 has a second slide rail 2773 at two opposite ends of the second rail engagement surface 2771 along the second rail engagement surface 2771, and the two second slide rails 2773 respectively correspond to the second guide groove 2724 of the second rail block 272 and the guide groove 2746 of the third rail block 274. The second guide rail rod 277 is provided with a second clamping part 2772 at the middle part of the second guide rail matching surface 2771, which is adjacent to the front side of the second guide rail rod 277; preferably, the second snap portion 2772 is a strip-shaped protruding wall extending in the axial direction of the second rail mating surface 2771. A position-avoiding groove 2774 is formed in the front surface of the second guide rail rod 277 adjacent to the second slide rail 2773. Two fixing holes 2775 are formed on the back of the second rail rod 277 adjacent to the avoiding groove 2774. At least one positioning opening 2778 is formed on the side of the second rail rod 277 facing away from the second rail block 271, adjacent to the extension piece 2756.

As shown in fig. 17 and 18, each linkage machine 28 includes two first shafts 281, a linkage piece 282, two sets of fixing plates 283, a second connecting frame 284, a fixing block 286 and a connecting column 287, which are spaced and parallel, the two first shafts 281 are disposed on two opposite sides of the linkage piece 282, and the two sets of fixing plates 283 and the second connecting frame 284 are used for connecting the two first shafts 281 and the linkage piece 282. The two first shafts 281 are solid shafts and are respectively connected to the two transmission members 262, and the linkage member 282 is connected between the two first shafts 281, wherein one of the transmission members 262 rotates to drive the corresponding first shaft 281 to rotate, and the first shaft 281 drives the other first shaft 281 to rotate through the linkage member 282, so that the other transmission member 262 also rotates. The two first axes 281 are symmetrical about a center line of the link 282.

Each first shaft 281 and the linkage piece 282 are connected through a slider 2821 which is matched with the spiral guide slot 2811 through the spiral guide slot 2811, wherein one first shaft 281 rotates to enable the slider 2821 to slide in the corresponding spiral guide slot 2811, so that the linkage piece 282 moves along the direction parallel to the axis of the first shaft 281 to drive the other first shaft 281 to rotate together.

The link 282 is a link block, the link 282 includes two opposite side surfaces 2822, the two side surfaces 2822 are provided with two opposite accommodating grooves 2823 along the axial direction of the first shaft 281, the cross section of each accommodating groove 2823 is arc-shaped, and the slide block 2821 is convexly disposed on the inner surface of the accommodating groove 2823. Preferably, the outer surface of each slide 2821 is a spherical surface. In this embodiment, the cross section of the inner surface of each receiving groove 2823 is semicircular, and the inner surface of each receiving groove 2823 of the link 282 is provided with at least one slider 2821 along the extending direction of the receiving groove 2823. In other embodiments, the inner surface of each receiving groove 2823 is provided with two or more sliders 2821 spaced apart from each other along the extending direction of the receiving groove 2823. A through hole 2825 is formed in the middle of the link 282 along the extending direction of the receiving groove 2823.

The outer peripheral walls of the two first shafts 281 are respectively and rotatably accommodated in the two accommodating grooves 2823, at least one spiral guide groove 2811 is formed in the outer peripheral wall of each first shaft 281, and when each first shaft 281 is accommodated in the corresponding accommodating groove 2823, the slider 2821 in the accommodating groove 2823 is slidably inserted into the spiral guide groove 2811. Preferably, the cross section of the inner surface of each spiral guide groove 2811 is semicircular, and the outer surface of the slider 2821 slidably fits the inner surface of the corresponding spiral guide groove 2811. Specifically, a rotary drum 2812 is fixedly sleeved in the middle of each first shaft 281, the rotary drum 2812 is a cylinder, and the spiral guide groove 2811 is formed in the outer peripheral wall of the rotary drum 2812. In this embodiment, a spiral guide slot 2811 is formed in the outer peripheral wall of the rotary drum 2812; in other embodiments, the outer circumferential wall of the drum 2812 is provided with two or more spiral guide slots 2811 spaced from each other. Preferably, the radius of the drums 2812 is equal to the radius of the receiving grooves 2823 so that the outer circumferential wall of each drum 2812 fits the inner circumferential wall of the corresponding receiving groove 2823. Opposite ends of the outer peripheral wall of the drum 2812 of each first shaft 281 are circumferentially provided with annular locking grooves 2814, respectively. The engaging groove 2814 is used for engaging with the engaging piece 283. The first end 2815 of each first shaft 281 is kidney-shaped in cross-section and the opposite second end 2816 is circular in cross-section. The first end 2815 of each first shaft 281 is used for connecting with a corresponding transmission member 262.

The two opposite ends of each fixing plate 283 are respectively provided with a hook 2832, the middle part of the fixing plate 283 is provided with a clamping hole 2834, and each hook 2832 can be inserted into a corresponding clamping groove 2814. The second connecting frame 284 comprises a connecting piece 2841 and a strap 2845 arranged in the middle of one side of the connecting piece 2841, wherein the strap 2845 is perpendicular to the connecting piece 2841. The two opposite ends of the connecting piece 2841 are respectively provided with a rotating hole 2842, and the two opposite end faces of the connecting piece 2841 are respectively provided with arc faces; the middle part of the connecting piece 2841 is provided with a through hole 2843. Connecting hole 2846 is opened in the middle of one end of connecting piece 2845 far away from connecting piece 2841.

The fixing block 286 comprises a circular arc-shaped front surface 2861, a bottom surface, two opposite end surfaces 2862 and two opposite side surfaces, a containing groove 2863 is formed in one end of the middle of the front surface 2861 of the fixing block 286, the containing groove 2863 penetrates through the end surface 2862, and a connecting hole 28630 is formed in the bottom surface of the containing groove 2863 of the fixing block 286; the middle of the end surface 2862 of the fixing block 286 departing from the receiving groove 2863 is convexly provided with a connecting piece 2864, and the connecting piece 2864 is provided with a through hole. The two opposite sides of the end surface 2862 of the fixing block 286 provided with the accommodating groove 2863 are respectively provided with a connecting hole 2865, and the connecting holes 2865 do not penetrate through the fixing block 286. The two opposite sides of the end surface 2862 of the fixing block 286 provided with the connecting piece 2864 are respectively provided with a guide slot 2867, each guide slot 2867 is an arc slot, and the two guide slots 2867 respectively penetrate through the two opposite side surfaces of the fixing block 286.

In this embodiment, the number of the first shielding mechanisms 290 is two, that is, the shielding mechanism 290 is disposed at the end of each folding-assist assembly 24. Specifically, the first shutter mechanism 290 includes a plurality of hinged shutter units respectively connected to the connection mechanism 27, the first rotating hinge 252, the second rotating hinge 253, the first connection hinge 254, and the second connection hinge 257. Preferably, the shielding unit in the middle of each first shielding mechanism 290 is integrally formed with the second rail block 272 of the connecting mechanism 27, and the shielding units at the opposite ends are connected to the first connecting hinge 254 and the second connecting hinge 257, respectively. When the plurality of hinges of the bending mechanism 25 relatively rotate, the shielding units also relatively rotate. The first shielding mechanism 290 is used to shield foreign materials such as dust or water from entering the folding device 22 from the side.

Referring to fig. 18 and 19, each first shielding mechanism 290 is a watch chain structure formed by sequentially connecting a plurality of shielding units, each of the plurality of shielding units includes a first shielding unit, a second shielding unit and a third shielding unit located between the first shielding unit and the second shielding unit, the first shielding unit is connected to the connecting mechanism 27, the second shielding unit is connected to the first connecting hinge 254 and the second connecting hinge 257, and the third shielding unit is connected to the first rotating hinge 252 and the second rotating hinge 253. Specifically, the first shielding mechanism 290 includes a middle blocking piece 291 located in the middle, connecting blocking pieces 292 rotatably connected to two opposite sides of the middle blocking piece 291, and a fixing blocking piece 293 rotatably connected to one side of each connecting blocking piece 292 far from the middle blocking piece 291. Optionally, a middle blocking piece 291 is fixedly connected to the end of the second rail block 272 away from the first rail block 271, two connecting blocking pieces 292 are fixedly connected to the first rotating hinge 252 and the second rotating hinge 253, respectively, and two fixed blocking pieces 293 are fixedly connected to the ends of the first connecting hinge 254 and the second connecting hinge 257, respectively. The first shielding unit is a middle shielding plate 291, the second shielding unit is a fixed shielding plate 293, and the third shielding unit is a connecting shielding plate 292.

Specifically, the middle stopper 291 includes a connecting portion 2911 having a substantially waist shape and a shielding portion 2912 provided on the side of the connecting portion 2911. The connecting portion 2911 has a rotation shaft 2914 provided at each of opposite ends adjacent to one side of the second rail block 272. The opposite ends of the connecting portion 2911 are provided with receiving notches around each of the rotating shafts 2914.

Each connecting barrier 292 includes a connecting portion 2921 having a generally kidney-shaped shape, a shielding portion 2922 disposed on one side of the connecting portion 2921, and a connecting bar 2924 disposed on an end of the shielding portion 2922 away from the connecting portion 2921. The front surface and the two opposite end surfaces of the connecting portion 2921 are both provided with arc surfaces, and the front surface and each end surface of the connecting portion 2921 are in smooth transition. The two opposite ends of the connecting part 2921, which are away from the connecting strip, are respectively provided with an accommodating groove, and the side surface of the connecting part 2921, which is located in each accommodating groove, is an arc surface. The opposite ends of the connecting portion 2921 are respectively provided with shaft holes 2925 communicating with the corresponding receiving grooves. The ends of the connecting bars 2924 are provided with through holes. Each fixed baffle 293 comprises a connecting part 2931, a shielding part 2932 arranged on one side of the connecting part 2931 and a fixed part 2934 arranged on the shielding part 2932, wherein one end of the connecting part 2931, which is far away from the shielding part 2932, is provided with an arc surface, and one end of the connecting part 2931, which is far away from the shielding part 2932, is convexly provided with a rotating shaft 2935 along the axial lead of the arc surface; the fixed portion 2934 is provided with a plurality of connection holes 2936.

When each folding-assist assembly 24 is assembled, the two connecting blocking pieces 292 are respectively placed at two opposite sides of the middle blocking piece 291, so that two opposite ends of the middle blocking piece 291 are respectively accommodated in the accommodating grooves of the two connecting blocking pieces 292, and the two rotating shafts 2914 are respectively inserted into the shaft holes 2925 of the two connecting blocking pieces 292; the two fixing blocking pieces 293 are respectively arranged at one side of the two connecting blocking pieces 292 far away from the middle blocking piece 291, the end parts of the two fixing blocking pieces 293 provided with the rotating shafts 2935 are respectively accommodated in the accommodating grooves of the two connecting blocking pieces 292, and the rotating shafts 2935 of the two fixing blocking pieces 293 are respectively inserted into the corresponding shaft holes 2925. Fitting a second rail mating surface 2771 of the second rail bar 277 to a second rail curved surface 2722 of the second rail block 272, inserting a second slide rail 2773 of the second rail bar 277 into the second guide slot 2724, connecting the third rail block 274 to the second rail block 272, and inserting a location post 2747 of the third rail block 274 into the connection hole 2727 such that the other second slide rail 2773 of the second rail bar 277 is inserted into the guide slot 2746; the first rail mating surface 2751 of the first rail bar 275 fits the first rail curved surface 2711 of the first rail block 271, so that one first rail 2753 of the first rail bar 275 is inserted into the first guide groove 2714, the side of the third rail block 274 away from the second rail block 272 is connected to the first rail block 271, the positioning post 2744 is clamped into the connecting hole 2717, and the other first rail 2753 of the first rail bar 275 is inserted into the guide groove 2743. The rotary barrels 2812 of the two first shafts 281 are respectively accommodated in the two accommodating grooves 2823 of the linkage piece 282, and the slide blocks 2821 are respectively slidably accommodated in the corresponding spiral guide grooves 2811; the hooks 2832 of the two sets of fixing plates 283 can be inserted into the corresponding slots 2814, and at this time, the locking holes 2834 of the two sets of fixing plates 283 are aligned with the through holes 2825 of the linkage piece 282; the first connecting frame 264 and the second connecting frame 284 are respectively arranged at one side of the two fixing sheets 283, which faces away from the linkage piece 282, so that the first end portions 2815 of the two first shafts 281 are respectively inserted into the two through holes 2643 of the first connecting frame 264, and the second end portions 2816 are respectively inserted into the two through holes 2843 of the second connecting frame 284; the connecting column 287 is inserted into the through hole 2843 of the second connecting frame 284, the fastening hole 2834 of the fixing plate 283, the through hole 2825 of the link 282 and the through hole 2643 of the first connecting frame 264 in sequence; after the first end portions 2815 of the two first shafts 281 are respectively fixed and inserted into the inner cavities of the connecting tubes 2624 of the two driving members 262, the first shaft is inserted into the two connecting holes 2717 of the first rail block 271, at this time, the overlapping pieces 2645 of the first connecting frame 264 are overlapped on the front surface of the first rail block 271, the connecting holes 2646 are opposite to the positioning holes 2719, the notches 2625 of the two driving members 262 are respectively opposite to the two notches 2718 of the first rail block 271, and the locking member passes through the connecting holes 2646 and is locked in the positioning holes 2719. The second ends 2816 of the two first shafts 281 are respectively inserted into the two connection holes 2865 of the fixing block 286, the strap 2845 is accommodated in the accommodating groove 2863, and the locking member passes through the connection hole 2846 and is locked in the connection hole 28630.

At this time, the connecting cylinders 2624 of the two transmission members 262 are respectively and fixedly connected to the first end portions 2815 of the two first shafts 281, wherein one transmission member 262 rotates along the corresponding first shaft 281 to drive the first shaft 281 to rotate, the rotation of the first shaft 281 slides the corresponding slider 2821 in the spiral guide groove 2811 to drive the linkage member 282 to slide along the connecting column 287, and the sliding of the linkage member 282 drives the other transmission member 281 to rotate, so as to realize the linkage of the transmission members 262, that is, the two transmission members 262 synchronously rotate relatively in opposite directions or rotate relatively in opposite directions, and the opposite rotation means that one ends of the two transmission members 281, which are far away from the corresponding first shaft 281, are relatively close together; the back rotation means that one ends of the two transmission members 281 far away from the corresponding first shafts 281 are relatively far away; the first slide rail 2753 of the first guide rail bar 275 is slidably received in the first guide groove 2714 and the guide groove 2743, the first guide rail mating surface 2751 slidably fits the first guide rail curved surface 2712, the first clamping portion 2752 slidably abuts against the first clamping mating portion 2716, and the first clamping portion 2752 has a movable damping relative to the first clamping mating portion 2716; second slide rail 2773 of second guide rail pole 277 holds in second guide slot 2774 and guide slot 2746 slidably, and second guide rail fitting surface 2771 fits in second guide rail curved surface 2722 slidably, and second joint portion 2772 spring is kept off in second joint cooperation portion 2726, and second joint portion 2772 has the damping of activity when sliding for second joint cooperation portion 2726, and at this moment, first guide rail pole 275 is roughly parallel with second guide rail pole 277.

As shown in fig. 4 to 6, the shutter mechanism 29 is provided inside the bending portion of the bendable mechanism 25, and the shutter mechanism 29 is connected to the connecting mechanism 27; when the bending mechanism 25 bends, the connecting mechanism 27 can drive the shielding mechanism 29 to slide relative to the bending mechanism 25. Specifically, the first shielding mechanism 290 of the shielding mechanism 29 is disposed at two opposite ends of the bendable mechanism 25, the second shielding mechanism 295 is disposed at the back of the bendable mechanism 25, the middle blocking piece 291 of the first shielding mechanism 290 is fixedly connected to the connecting mechanism 27, the connecting blocking piece 292 and the fixed blocking piece 293 are connected to the bendable mechanism 25, and the second shielding mechanism 295 is connected to the connecting mechanism 27; when the bending mechanism 25 bends, the connecting mechanism 27 can drive the second shielding mechanism 295 to slide relative to the bending mechanism 25, and the first shielding mechanism 290 bends along with the bending mechanism 25.

The second shutter mechanism 295 covers at least the middle hinge 250, and specifically, the second shutter mechanism 295 includes a first shutter 2951 covering at least a first portion of the middle hinge 251 and the first rotating hinge 253, and a second shutter 2955 covering at least a second portion of the middle hinge 251 and the second rotating hinge 252. In this embodiment, the first and

second shielding members

2951 and 2955 are both strip-shaped shielding members, and since the first and

second shielding members

2951 and 2955 have the same structure, only the first shielding member 2951 will be described in detail: the first shielding member 2951 includes a rectangular cover plate 2952 and a flange 2953 disposed on the front edge of the cover plate 2952, and the cover plate 2952 and the flange 2953 enclose an accommodating space 2954. The receiving space 2954 of the first shade 2951 receives the connecting piece 2956, and the first shade 2951 is fixedly connected to the first guide rail 275 by the connecting piece 2956. Specifically, the connecting pieces 2956 are provided with a plurality of connecting holes 2957 at opposite ends thereof, respectively. The second shutter 2955 also includes a rectangular cover plate and a flange provided at the front edge of the cover plate, and the second shutter 2955 is also fixedly connected to the second rail 277 by a connecting piece 2956.

Referring to fig. 3 to fig. 26, when the folding device 22 is assembled, the two folding-assist assemblies 24 are respectively placed at two opposite ends of the back surface of the middle hinge 251, so that the through hole of the connecting piece 2864 of the fixing block 286 of each folding-assist assembly 24 is aligned with the corresponding connecting column 2512 of the middle hinge 251, and the positioning hole 2729 of the second guide rail block 272 is aligned with the corresponding counter-sunk hole 2514; two screws are respectively inserted into the through holes of the connecting pieces 2864 of the two folding-assistant components 24 and locked in the connecting holes of the connecting column 2512, and two locking pieces are inserted into the countersunk holes 2514 at the two ends of the middle hinge 251 and locked in the positioning holes 2729 of the two folding-assistant components 24. The two first rotating hinges 252 and the second rotating hinges 253 are respectively arranged at two opposite sides of the middle hinge 251, the two second arc-shaped guide plates 2524 of the first rotating hinges 252 are respectively inserted into the guide grooves 2867 of the two folding-assistant components 24, and the two second arc-shaped guide plates 2534 of the second rotating hinges 253 are respectively inserted into the guide grooves 2867 of the two folding-assistant components 24; the connecting bar 2924 of the connecting blocking piece 292 of the first shielding mechanism 290 of each folding-assist assembly 24 is respectively placed on the positioning blocks 2526 at the two opposite ends of the first rotating hinge 252 and the positioning blocks 2536 at the two opposite ends of the second rotating hinge 253, and the through holes of the connecting bar 2924 into which the plurality of locking members are respectively inserted are locked and fixed to the corresponding connecting

holes

2527 and 2537. The first connecting hinge 254 and the second connecting hinge 257 are respectively arranged at two opposite sides of the middle hinge 250, the first guide rail 275 at one side of the two folding-assist assemblies 24 are respectively inserted into the first guide chute 2556 of the first connecting hinge 254, and the tail end of each first guide rail 275 is rotatably connected to the first end of the first connecting rod 2581 of the corresponding connecting rod 2580, that is, the connecting hole 2757 at the tail end of the locking piece inserted extension piece 2756 is connected to the through hole 2583 at the first end of the first connecting rod 2581; the second guide rail rods 277 on the other sides of the two folding assist units 24 are inserted into the second slide grooves 2570 of the second connecting hinge 257, respectively. The two positioning members 25760 on the first connecting hinge 254 can be pushed by the corresponding elastic members 25765 to clamp the clamping blocks 25761 into the corresponding positioning openings 2758; the two positioning members 25760 on the second connecting hinge 267 are pushed by the corresponding elastic members 25765 to allow the locking blocks 25761 to be locked in the corresponding positioning openings 2778, so that the folding device 22 is kept in a flat state.

The slide guide rods 2623 of the transmission members 262 on one side of the two folding-assisting assemblies 24 are accommodated in the transmission grooves 25514 of the first connecting hinge 254, the two cover plates 25513 are respectively covered on the transmission grooves 25514 and fixed by the locking members, at this time, the slide guide rods 2623 can slide along the arc-shaped surfaces of the transmission grooves 25514, the slide guide rods 2623 of the transmission members 262 on the other side of the two folding-assisting assemblies 24 are accommodated in the transmission grooves 2577 of the second connecting hinge 257, the two cover plates 2578 are respectively covered on the transmission grooves 2577 and fixed by the locking members, and at this time, the slide guide rods 2623 can slide along the arc-shaped surfaces of the transmission grooves 2577. The two fixing blocking pieces 293 of the first blocking mechanism 290 of each folding-assist assembly 24 are respectively fixed at the ends of the first connecting hinge 254 and the second connecting hinge 257, that is, the fixing portions 2934 of the fixing blocking pieces 293 are respectively clamped into the fixing grooves 25518 of the first connecting hinge 254 and the fixing blocks 25725 connected to the second connecting hinge 257, and are locked to the first connecting hinge 254 and the second connecting hinge 257 after being inserted into the connecting holes 2936 through locking members; the two tabs 25516 of the first connecting hinge 254 correspond to the first arc guide 2522 of the first swivel hinge 252 and the two tabs 25723 of the second connecting hinge 257 correspond to the first arc guide 2532 of the second swivel hinge 253. The second shielding mechanism 295 is arranged on the two folding-assistant assemblies 24, specifically, one connecting piece 2956 is covered on the back surfaces of the two first guide rail rods 275, a plurality of locking pieces are respectively inserted into the connecting holes 2957 of the connecting piece 2956 and locked with the corresponding fixing holes 2755, and the first shielding piece 2951 is sleeved and fixed on the connecting piece 2956; another connecting piece 2956 covers the back surfaces of the two second guide rail rods 277, a plurality of locking pieces are respectively inserted into the connecting holes 2957 of the connecting piece 2956 and locked with the corresponding fixing holes 2775, and the second shielding piece 2955 is fixedly sleeved on the connecting piece 2956; the second shielding mechanism 295 covers the back of the folding device 22 to prevent foreign substances such as dust from entering the folding device 22 from the back.

Preferably, the transmission mechanism 26 is connected to the middle hinge joint 250 and the connecting hinge joint, and is configured to drive the connecting hinge joint to move relative to the middle hinge joint 250; that is, a first end of the actuator 26 is pivotally connected to the central hinge joint 250 and a second end of the actuator 26 is slidably connected to the connecting hinge joint. Specifically, one end of the transmission member 262 on one side of each folding-assist assembly 24 is rotatably connected to the middle hinge joint 250, and the other end of the transmission member 262 is rotatably and slidably connected to the first connecting hinge joint 254; one end of the transmission member 262 on the other side of each folding-assist assembly 24 is rotatably connected to the middle hinge joint 250, and the other end of the transmission member 262 is rotatably and slidably connected to the second connecting hinge joint 257.

Preferably, one end of the connection mechanism 27 is rotatably connected to the middle hinge joint 250, and the other end is slidably connected to the connection hinge joint; specifically, the first guide rail bar 275 of each folding assist assembly 24 is pivotally connected to the central hinge joint 250 along a first virtual axis L1, and is slidably connected at the other end to the first connecting hinge joint 254; the second guide rail 277 of each folding assist unit 24 is pivotally connected to the middle hinge joint 250 along a second virtual axis L2 and is slidably connected at the other end to the second connecting hinge joint 257.

The transmission mechanism 26 of each folding-assist assembly 24 is rotatably connected to the middle hinge joint 250 around a first shaft 281, and the connecting mechanism 27 is rotatably connected to the middle hinge joint 250 around a second shaft, wherein the first shaft is staggered with the second shaft; specifically, the two transmission members 262 of the transmission mechanism 26 are connected to the central hinge joint 250 by two first shafts 281 spaced in parallel; the second axis comprises a first virtual axis L1 and a second virtual axis L2 spaced in parallel, the first rail bar 275 being connected to the central hinge 250 about said first virtual axis L1, further the first rail bar 275 rotates relative to the first rail block 271 along the first virtual axis L1; the second rail rod 277 is connected to the middle hinge 250 about the second virtual axis L2, and further, the second rail rod 277 rotates relative to the second rail block 272 along the second virtual axis L2. Specifically, the first axis 281 is a solid axis, the first virtual axis L1 is a shaft axis of the first rail curved surface 2712, the second virtual axis L2 is a shaft axis of the second rail curved surface 2722, and the first axis 251 is spaced in parallel with the first virtual axis L1 and the second virtual axis L2.

Referring to fig. 27-34, when the folding device 22 is folded, the first connecting hinge 254 is rotated toward the second connecting hinge 257, the two first guide rail rods 275 slide in the two first guide slots 2556 of the first connecting hinge 254, each first guide rail rod 275 slidably pushes the corresponding positioning member 25760 to slide away from the first guide rail rod 275, and the elastic member 25765 elastically deforms, so that the block 25761 of the positioning member 25760 is separated from the corresponding positioning opening 2758; the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, so that when the transmission member 2621 connected between the first hinge 254 and the linkage 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 is driven to rotate by the linkage 282, the first shaft 281 on the other side is driven to rotate by the first shaft 281 on the other side, the transmission member 2621 connected between the second hinge 257 and the linkage 28 is driven to rotate by the first shaft 281 on the other side, the second hinge 257 synchronously rotates toward the first hinge 255, the second hinge 257 drives the second guide rail 277 to slide in the second sliding groove 2570, the second guide rail 277 slidably pushes the corresponding positioning member 25760 to slide away from the second guide rail 275, the elastic member 25765 elastically deforms, and the positioning block 25761 of the positioning member 25760 is separated from the corresponding positioning opening 2778, the two second rail bars 277 of each folding-assist assembly 24 are also brought close to each other to achieve the linked folding of the folding device 22.

In the bending process, the extension piece 2756 of the first guide rail 275 drives the first end of the first link 2851 to rotate relative to the extension piece 2756, and the second end of the first link 2851 rotates relative to the second end of the second link 2582, so that the first link 2851 is away from the second position-limiting portion 2559 until the first link 2851 abuts against the first position-limiting surface 25581 and the first position-limiting portion 2595 of the stop bar 2558. The connecting hinge rotates about the virtual axis with respect to the middle hinge 250, specifically, the first connecting hinge 254 rotates about the first virtual axis L1 with respect to the middle hinge 250, and the first connecting hinge 254 slides with respect to the middle hinge 250; the second connecting hinge 257 rotates about the second virtual axis L2 with respect to the middle hinge 250, and the second connecting hinge 257 slides with respect to the middle hinge 250. The first guide rail matching surface 2751 of the first guide rail rod 275 is slidably attached to the first guide rail curved surface 2712, the first clamping portion 2752 of the first guide rail rod 275 slidably pushes against the first clamping matching portion 2716, so that the first clamping matching portion 2716 is elastically deformed, and movable damping is provided between the first clamping portion 2752 and the first clamping matching portion 2716 until the first clamping portion 2752 is disengaged from the clamping with the clamping strip 27162; meanwhile, a second guide rail matching surface 2771 of the second guide rail rod 277 is slidably attached to a second guide rail curved surface 2722, a second clamping portion 2772 of the second guide rail rod 277 slidably pushes against the second clamping matching portion 2726 to enable the second clamping matching portion 2726 to elastically deform, and movable damping is arranged between the second clamping portion 2772 and the second clamping matching portion 2726 until the second clamping portion 2772 is clamped with the matching groove 27262, so that the bendable mechanism 25 is kept in a bent state; the two fixed blocking pieces 293 of each first blocking mechanism 290 move along with the first connecting hinge 254 and the second connecting hinge 257 to drive the two connecting blocking pieces 292 to rotate synchronously, the two connecting tabs 292 drive the first rotating hinge 252 and the second rotating hinge 253 to rotate synchronously, the second arc-shaped guide plate 2524 of the first rotating hinge 252 slides in the corresponding guide groove 2867, the second arc-shaped guide plate 2534 of the second rotating hinge 253 slides in the corresponding guide groove 2867, the two first arc-shaped guide plates 2522 of the first rotating hinge 254 respectively contact the protruding piece 25516 corresponding to the first connecting hinge 254 in a sliding manner, and the two first arc-shaped guide plates 2532 of the second rotating hinge 253 respectively contact the protruding piece 25723 corresponding to the second connecting hinge 257 in a sliding manner, so as to achieve the synchronous bending of the bendable mechanism 25. The first shutter 2951 of the second shutter mechanism 295 rotates with the first rail rod 257 relative to the intermediate hinge 251, that is, the first shutter 2951 rotates along the first virtual axis L1; the second shutter 2955 rotates with the second rail rod 277 with respect to the intermediate hinge 251, that is, the second shutter 2955 rotates along the second virtual axis L2; the first virtual axis L1 is spaced parallel to the second virtual axis L2, the first virtual axis L1 is located within the first shutter 2951, and the second virtual axis L2 is located within the second shutter 2955. Preferably, the virtual axis is located at the back of the second shutter mechanism 295 or close to the back of the second shutter mechanism 295, in particular, the first virtual axis L1 is located at or near the back of the first shutter 2951, and the second virtual axis L2 is located at or near the back of the second shutter 2955; the first virtual axis L1 and the second virtual axis L2 are close to the back surface of the second shielding mechanism 295, and the closer the virtual axis is to the back surface of the second shielding mechanism 295, the less the length difference occurs in the process of unfolding and folding the back surface of the second shielding mechanism 295, so that the back surface of the second shielding mechanism 295 does not receive tension or compression force.

Optionally, first snap-fit portion 2752 is located on first rail mating surface 2751; the first snap fit portion 2716 is located on the first rail curved surface 2712; the first clamping matching part 2716 is clamped with the first clamping part 2752 when the bendable mechanism 20 is in an unfolded state; when the bendable mechanism 25 is bent, the first snap portion 2752 overcomes the resistance of the first snap-fit portion 2716 and disengages from the first snap-fit portion 2716.

The sliding track of the transmission mechanism 26 relative to the connecting joint is arc-shaped, that is, the sliding track between the transmission member 262 connected to the first connecting joint 254 and the first connecting joint 254 is the bottom surface of the transmission groove 25514; the sliding track between the driving member 262 connected to the second connecting hinge 257 and the second connecting hinge 257 is the bottom surface of the driving groove 2577.

When the bending mechanism 25 bends, the connecting mechanism 27 slides in a first direction relative to the connecting hinge until the first position-limiting portion 2595 is limited by the connecting mechanism 27 in a second direction opposite to the first direction. Specifically, the first rail bar 275 slides in the first direction relative to the first connecting hinge 254 until the first stopper 2595 is stopped by the first rail bar 275 in the second direction.

Alternatively, when the bendable mechanism 25 bends, the moving direction of the first end of the second connecting rod 2582 relative to the connecting hinge 27 is opposite to the moving direction of the first end of the first connecting rod 2581 relative to the connecting hinge 27; specifically, the direction of movement of the first end of the second link 2582 relative to the end of the first link 254 is opposite to the direction of movement of the first end of the first link 2581 relative to the end of the first link 254.

Alternatively, the first end of the first connecting rod 2581 can move a greater distance relative to the connecting hinge 27 than the first end of the second connecting rod 2582 can move relative to the connecting hinge 27 when the bendable mechanism 25 bends.

Optionally, during the bending process of the bendable mechanism 25, an included angle formed between the first connecting rod 2581 and the second connecting rod 2582 is increased.

When the connecting hinge is movable relative to the central hinge 250, the drive mechanism 26 slides relative to the connecting hinge; specifically, as the first connecting hinge 254 rotates and slides relative to the middle hinge 250, the transmission member 262 connected between the first connecting hinge 254 and the middle hinge 250 slides relative to the first connecting hinge 254; as the second connecting hinge 257 rotates and slides relative to the central hinge 250, the transmission member 262 connected between the second connecting hinge 257 and the central hinge 250 slides relative to the second connecting hinge 257.

The sliding track of the transmission 26 relative to the joint is different from the sliding track of the joint 27 relative to the joint. Specifically, the sliding locus of the transmission member 262 of the transmission mechanism 26 with respect to the first connecting hinge 254 or the second connecting hinge 257 is different from the sliding locus of the first rail rod 275 of the connecting mechanism 27 with respect to the first connecting hinge 254 or the second rail rod 277 with respect to the second connecting hinge 257.

Preferably, the sliding movement of the drive mechanism 26 relative to the connecting joint includes a first sliding component directed away from or towards the central joint 250 and a second sliding component perpendicular to the first sliding component. In particular, the sliding movement of the transmission member 262 connected to the first joint 254 relative to said first joint 254 comprises a first sliding component directed away from or towards the central joint 250 and a second sliding component perpendicular to said first sliding component.

In other usage manners, the second connecting hinge joint 257 can be rotated toward the first connecting hinge joint 254, the two second guide rail rods 277 respectively slide in the two second slide slots 2570 of the second connecting hinge joint 257, each second guide rail rod 277 slidably pushes the corresponding positioning member 25760 to slide away from the corresponding second guide rail rod 277, the elastic member 25765 elastically deforms, and the clamping block 25761 of the positioning member 25760 is separated from the corresponding positioning opening 2778; the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, when the transmission member 2621 connected between the second connecting hinge 257 and the linkage 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 is driven to rotate by the linkage 282, the first shaft 281 on the other side is driven to rotate by the first shaft 281 on the other side, the first shaft 281 on the other side rotates to drive the transmission member 2621 connected between the first connecting hinge 254 and the linkage 28 to rotate, so that the first connecting hinge 254 synchronously rotates towards the second connecting hinge 254, the first connecting hinge 255 drives the first guide rail 257 to slide in the first sliding groove 2556, the first guide rail 257 slidably pushes the corresponding positioning member 25760 to slide away from the first guide rail 257, the elastic member 25765 elastically deforms, and the positioning block 25761 of the positioning member 25760 is separated from the corresponding positioning opening 2758, the two first rail bars 275 of each folding assist assembly 24 are also brought together to effect the coordinated bending of the folding device 22.

In other usage, the first connecting hinge 254 and the second connecting hinge 257 may rotate together in opposite directions, and since the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, the first connecting hinge 254 and the second connecting hinge 257 drive the transmission member 262 of each folding-assist assembly 24 to rotate together, so as to drive the two first shafts 281 to rotate, and to make the two transmission members 262 approach each other, so that the first connecting hinge 254 and the second connecting hinge 257 approach each other synchronously, and the folding device 22 is bent.

When the folding device 22 is unfolded and flattened from the bent state, the first connecting hinge 254 is rotated away from the second connecting hinge 257, the two first guide rail rods 275 respectively slide in the two first guide sliding grooves 2556 of the first connecting hinge 254 to push the positioning piece 25760 to slide away from the corresponding first guide rail rod 275, and the elastic piece 25765 elastically deforms until the clamping block 25761 of the positioning piece 25760 is clamped into the corresponding positioning opening 2758; meanwhile, the two transmission rods 2621 slide in the transmission grooves 25514 of the first hinge joint 254, and since the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, when the transmission rod 2621 connected between the first hinge joint 254 and the linkage 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 is driven to rotate by the linkage 282, the first shaft 281 on the other side is driven to rotate by the first shaft 281 on the other side, the first shaft 281 on the other side rotates to drive the transmission rod 2621 connected between the second hinge joint 257 and the linkage 28 to rotate, so that the second hinge joint 257 synchronously rotates away from the first hinge joint 255, the second hinge joint 257 drives the second guide rail rod 277 to slide in the second sliding groove 2570, the second guide rail 277 slidably pushes the corresponding positioning member 25760 to slide away from the second guide rail 275, the elastic member 25765 elastically deforms until the fixture block 25761 of the positioning member 25760 is clamped into the corresponding positioning opening 2778, the two second rail bars 277 of each of the folding assist assemblies 24 are also moved away from each other to effect the linked flattening of the folding device 22.

In the flattening process, the extension piece 2756 of the first guide rail rod 275 drives the first end of the first link 2851 to rotate relative to the extension piece 2756, the second end of the first link 2851 rotates relative to the second end of the second link 2582, so that the first link 2851 is far away from the first limiting portion 2595 and the first limiting surface 25581 and is close to the second limiting portion 2559 until the first link 2851 is attached to the second limiting surface 25591, and the elastic member 25765 pushes the positioning member 25760 to slide until the fixture block 25761 is clamped into the corresponding positioning port 2758, 2778, so as to position the folding device 22 to keep the flattening state; the first guide rail matching surface 2751 of the first guide rail rod 275 is slidably attached to the first guide rail curved surface 2712 of the second limiting portion 2559, and the first clamping portion 2752 of the first guide rail rod 275 slidably abuts against and pushes the first clamping matching portion 2716, so that the first clamping matching portion 2716 is elastically deformed until the first clamping portion 2752 is clamped with the clamping strip 27162; meanwhile, a second guide rail matching surface 2771 of the second guide rail rod 277 is slidably attached to a second guide rail curved surface 2722, and a second clamping portion 2772 of the second guide rail rod 277 slidably abuts against and pushes a second clamping matching portion 2726, so that the second clamping matching portion 2726 is elastically deformed until the second clamping portion 2772 is clamped with the matching groove 27262, and the folding device 22 is positioned to keep the flat state. The two fixed blocking pieces 293 of each first shielding mechanism 290 rotate along with the first connecting hinge 254 and the second connecting hinge 257 to drive the two connecting blocking pieces 292 to rotate synchronously, the two connecting blocking pieces 292 drive the first rotating hinge 252 and the second rotating hinge 253 to rotate synchronously and to be away from each other, the second arc-shaped guide plate 2524 of the first rotating hinge 252 slides in the corresponding guide groove 2867, and the second arc-shaped guide plate 2534 of the second rotating hinge 253 slides in the corresponding guide groove 2867, so that the synchronous flattening of the bendable mechanism 25 is realized. The first shutter 2951 of the second shutter mechanism 295 rotates with the first guide rail lever 257 with respect to the intermediate hinge 251; the second shutter 2955 rotates with the second guide rail rod 277 with respect to the intermediate hinge 251 until the first shutter 2951 and the second shutter 2955 are in a flattened state.

In other use modes, the second connecting hinge joint 257 can be rotated away from the first connecting hinge joint 254, the two second guide rail rods 277 slide in the two second slide grooves 2570 of the second connecting hinge joint 257 respectively to push the positioning piece 25760 to slide away from the corresponding second guide rail rod 277, and the elastic piece 25765 is elastically deformed until the clamping block 25761 of the positioning piece 25760 is clamped into the corresponding positioning opening 2778; the two transmission rods 2621 slide in the transmission grooves 2577 of the second hinge joint 257, and since the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, when the transmission rod 2621 connected between the second hinge joint 257 and the linkage 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 drives the first shaft 281 on the other side to rotate through the linkage 282, the first shaft 281 on the other side rotates to drive the transmission rod 2621 connected between the first hinge joint 254 and the linkage 28 to rotate, and the transmission rod 2621 drives the first hinge joint 254 to rotate away from the second hinge joint 254.

In other usage, the first connecting hinge 254 and the second connecting hinge 257 may rotate together in opposite directions, and since the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage mechanism 28, the first connecting hinge 254 and the second connecting hinge 257 drive the transmission member 262 of each folding-assist assembly 24 to rotate in a direction away from each other, so as to drive the two first shafts 281 to rotate together, so that the two transmission members 262 approach each other, and the first connecting hinge 254 and the second connecting hinge 257 approach each other at the same time, so as to bend the folding device 22.

When the folding device 22 is in a flattened state, the first connecting rod 2581 can be attached to the second limiting surface 25591 of the second limiting portion 2559, which can prevent the sliding member 259 from collapsing on the lug 2555 when falling, so as to avoid the flexible screen fixedly connected with the sliding member 259 from arching and being damaged; when the folding device 22 is in the bent state, the first connecting rod 2581 can abut against the first position-limiting surface 25581 and the first position-limiting portion 2595 of the stop bar 2558, and can also prevent the sliding member 259 from collapsing on the lug 2555 when falling, so as to prevent the flexible screen fixedly connected with the sliding member 259 from arching and being damaged.

Referring to fig. 1 to 4 and fig. 11 to 14, the folding device 22 is disposed between the first frame 21 and the second frame 23, the two lugs 2555 of the first connecting hinge 254 are respectively received in the first frame 21, and the sliding member 259 located in the first frame 21 is fixedly connected to the first frame 21. The connecting frame 256 and the mounting frame 255 of the first connecting hinge 254 can slide relatively in a direction perpendicular to the bending axis of the middle hinge 250; the first elastic member 2553 generates an elastic force that pushes the connecting piece 2563 of the connecting frame 256 to the side away from the central hinge 250, and the second elastic member 25515 generates an elastic force that pushes the sliding member 259 away from the first connecting hinge 254. At this time, the sliding member 259 is located on one side of the foldable mechanism 25, the sliding member 259 is connected to the first frame 21, and the other side of the foldable mechanism 25 opposite to the sliding member 259 is connected to the second frame 23. Alternatively, the first and second

elastic members

2553 and 25515 are pre-compressed and then mounted at the corresponding positions. The front surface of the folding device 22 is coplanar with the front surface of the first frame 21 and the front surface of the second frame 23, and a gap is formed between the connecting plate 2561 and the mounting frame 255 in a direction perpendicular to the bending axis of the folding device 22. The support piece 50 has one end fixed to the second frame 23 and the other end fixed to the connecting plate 2561, and a portion between the two ends covers a portion of the folding device 22 and is slidable relative to the portion of the folding device 22. Optionally, the portion of the support sheet 50 between the ends overlies the first connecting hinge 254, the middle hinge 250, and the second connecting hinge 257. One end of the flexible screen 30 is fixed to one end of the support sheet 50, and the other end is fixed to the first frame 21, and a portion between the two ends covers a corresponding portion of the support sheet 50 and is slidable with respect to the corresponding portion of the support sheet 50. At this time, one side of the central hinge 250 is adapted to be coupled to the flexible screen 30, and the first and second virtual axes L1 and L2 are distant from the side of the central hinge 250 for coupling to the flexible screen 30 with respect to the first axis 281.

In other embodiments, the other side of the bendable mechanism 25 is fixedly connected to the first frame 21; the sliding member 259 is fixedly connected to the second frame 23.

When the folding device 22 is in the unfolded state, the first link 2581 of the link 2580 abuts against the second stopper surface 25591 of the second stopper portion 2559, so that when the folding device 22 receives a pressing force to the middle area, the folding device 22 is not compressed in the lateral direction due to the pressing force, and the screen is arched. When the folding device 22 is in the bent state, the first end of the first link 2581 of the link 2580 abuts against the first position-limiting surface 25581 and the first position-limiting portion 2595 of the stop bar 2558, so that when the folding device 22 receives a pressing force toward the middle region, the folding device 22 is not compressed in the lateral direction due to the pressing force, and the screen is arched.

Optionally, when the folding device 22 is bent, the supporting sheet 50 may drive the connecting sheet 2561 to slide relative to the second frame 23, and the flexible screen may drive the first frame 21 to slide relative to the second frame 23. The support sheet 50 can also drive the connection plate 2561 to slide toward the second frame 23 relative to the second frame 23, and the flexible screen can drive the first frame 21 to slide toward the second frame 23 relative to the second frame 23. The bendable region 31 of the flexible member 30 can bend along with the bending of the folding device 22, and the first elastic member 2553 pushes the connecting piece 2563 outward to drive the connecting plate 2561 to push the supporting piece to a side away from the middle hinge joint 250, so that the supporting piece 50 is in a tight state. The second elastic member 25515 pushes the first frame 21 outward, so that the flexible screen is tightened and prevented from being damaged due to arching.

When the bending mechanism 25 is unfolded, the connecting mechanism 27 slides relative to the connecting hinge to drive the connecting rod 2580 to move towards the second position-limiting portion 2559 relative to the bending mechanism 25 until the connecting rod 2580 approaches or abuts against the second position-limiting portion 2559 to limit the movement of the sliding member 259 towards the bending mechanism 25 relative to the bending mechanism 25. Further, when the foldable mechanism 25 is in the unfolded state, the first end of the first connecting rod 2581 abuts against or is close to the second position-limiting portion 2559, and when the foldable mechanism 25 is in the folded state, the first end of the first connecting rod 2581 is away from the second position-limiting portion 2559.

When the flexible element 30 is in the flattened state, the block 25761 of each positioning element 25760 is clipped into the corresponding positioning opening 2758 and positioning opening 2778, and the first connecting rod 2581 of the connecting rod 2580 abuts against the second position-limiting surface 25591 of the second position-limiting portion 2559, so as to position the bendable mechanism 25 to maintain the flattened state.

Optionally, when the bendable mechanism 25 is in the bent state, the connecting mechanism 27 is close to or abutted against the first position-limiting portion 2595 and the first position-limiting surface 25581, and when the bendable mechanism 25 is in the unfolded state, the connecting mechanism 27 is away from the first position-limiting portion 2595 and the first position-limiting surface 25581. Specifically, when the bendable mechanism 25 is in the bent state, the first guide rail rod 275 is close to or abutted against the first position-limiting portion 2595 and the first position-limiting surface 25581, and when the bendable mechanism 25 is in the unfolded state, the first guide rail rod 275 is far from the first position-limiting portion 2595 and the first position-limiting surface 25581.

Alternatively, the actuator 26 is pivotally connected to the central hinge 250 about a solid axis and the linkage 27 is pivotally connected to the central hinge 250 about a virtual axis.

Alternatively, the path of movement of the actuator 26 relative to the connecting hinge when the foldable mechanism 25 is bent includes an arc.

Referring to fig. 26 to 34, when the electronic device 100 is bent, a bending force is applied to at least one of the first frame 21 and the second frame 23 of the electronic device 100, so that the first connecting hinge 254 connected to the first frame 21 and the second connecting hinge 257 connected to the second frame 23 rotate in a direction adjacent to each other, the two folding-assistant assemblies 24 are used to bend the folding device 22, and the bendable region 31 of the flexible element 30 is bent. Specifically, if a bending force is applied to the first frame body 21, the first frame body 21 drives the first connecting hinge 254 to rotate along the first virtual axis L1 relative to the middle hinge 250 toward the side away from the flexible member 30; the first connecting hinge joint 254 drives the transmission rods 2621 corresponding to the two bending-assistant assemblies 24 to rotate, and the two first guide rail rods 275 respectively slide in the two first guide chutes 2556 of the first connecting hinge joint 254, so that the clamping block 25761 of the positioning piece 25760 on the first connecting hinge joint 254 is disengaged from the clamping connection of the positioning openings 2758 of the corresponding first guide rail rods 275; the two transmission rods 2621 slide within the transmission slots 25514 of the first connecting hinge 254, since the two transmission members 262 of each folding assist assembly 24 are connected by the linkage 28; therefore, when the transmission rod 2621 connected between the first connecting hinge 254 and the linkage mechanism 28 rotates, the corresponding first shaft 281 is driven to rotate, the first shaft 281 on the other side is driven by the linkage piece 282 to rotate, the first shaft 281 on the other side rotates to drive the transmission rod 2621 connected between the second connecting hinge 257 and the linkage mechanism 28 to rotate, so that the second connecting hinge 257 synchronously rotates toward the first connecting hinge 255, the second connecting hinge 257 drives the second guide rail rod 277 to slide in the second sliding slot 2570, the second guide rail rod 277 slidably pushes the corresponding positioning element 25760 to slide away from the second guide rail rod 275, the elastic element 25765 elastically deforms, so that the block 25761 of the positioning element 25760 is separated from the corresponding positioning opening 2778, so that the two second guide rail rods 277 of each folding assisting assembly 24 are also close to each other, so that the folding device 22 is in a bending state, and the bendable region 31 of the flexible element 30 bends along with the folding device 22, until the first frame 21 and the second frame 23 are attached to each other on their back surfaces.

At this time, the folding device 22 is bent, and the flexible member 30 is bent along with the folding device 22, so that the middle hinge joint 250 is connected with the front surfaces of the first connecting hinge joint 254 and the second connecting hinge joint 257 to form an arc-shaped surface, so as to facilitate the attachment of the flexible member 30.

In the process of bending the folding device 22, the connecting hinge rotates around the virtual axis relative to the middle hinge 250, specifically, each shielding mechanism 29 bends along with the bending of the folding device 22, that is, a plurality of shielding units of the first shielding mechanism 290 bend along the folding device 22, so that the shielding portion 2912 of the middle shielding piece 291, the shielding portion 2922 of the connecting shielding piece 292, and the shielding portion 2932 of the fixing shielding piece 293 overlap with each other, so as to prevent impurities such as dust from entering the folding device 22 from two opposite sides of the electronic device 100; the first shutter 2951 and the second shutter 2953 of the first shutter mechanism 290 are bent along with the folder 22 to prevent foreign substances such as dust from entering the folder 22 from the back of the electronic apparatus 100.

In other bending manners of the electronic device 100, only a bending force may be applied to the second frame 23, and the second frame 23 drives the second connecting hinge 257 to rotate along the second virtual axis L2 relative to the middle hinge 250 toward a side away from the flexible element 30; the second connecting hinge joint 257 drives the transmission rods 2621 corresponding to the two bending-assist assemblies 24 to rotate, and the two second guide rail rods 277 slide in the two second guide chutes 2570 of the second connecting hinge joint 257 respectively, so that the clamping blocks 25761 of the positioning pieces 25760 on the second connecting hinge joint 257 are disengaged from the clamping connection of the positioning holes 2778 of the corresponding second guide rail rods 277; the two driving rods 2621 slide in the driving grooves 2577 of the second connecting hinge 257 since the two driving members 262 of each folding-assist assembly 24 are connected by the linkage 28; therefore, when the transmission rod 2621 connected between the second connecting hinge 257 and the linkage mechanism 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 on the other side is driven by the linkage piece 282 to rotate, the first shaft 281 on the other side rotates to drive the transmission rod 2621 connected between the first connecting hinge 254 and the linkage mechanism 28 to rotate, so that the first connecting hinge 254 synchronously rotates towards the second connecting hinge 257, the first connecting hinge 254 drives the first guide rail 275 to slide in the first sliding slot 2556, the first guide rail 275 slidably pushes the corresponding positioning piece 25760 to slide away from the first guide rail 275, the elastic piece 25765 elastically deforms, so that the block 25761 of the positioning piece 25760 is separated from the corresponding positioning opening 2758, so that the two first guide rail 275 of each folding assisting assembly 24 are also close to each other, so that the folding device 22 is in a bending state, and the bendable region 31 of the flexible piece 30 bends along with the folding device 22, until the first frame 21 and the second frame 23 are attached to each other on their back surfaces.

In other bending manners of the electronic device 100, a bending force may be applied to the first frame 21 and the second frame 23 at the same time, and the first frame 21 and the second frame 23 respectively drive the first connecting hinge 254 and the second connecting hinge 257 to rotate relative to the side away from the flexible element 30, and the electronic device 100 is bent by the folding device 22.

When the electronic device 100 needs to be unfolded, the first frame 21 or the second frame 23 is pulled outward, and the first connecting hinge 254 connected to the first frame 21 and the second connecting link 257 connected to the second frame 23 are rotated in a direction away from each other. Specifically, a force that pulls at least one of the first housing 21 and the second housing 23 of the electronic apparatus 100 outward is applied to rotate the first connecting hinge 254 connected to the first housing 21 and the second connecting hinge 257 connected to the second housing 23 in a direction away from each other. If a force pulling outward is applied to the first frame body 21, the first frame body 21 drives the first connecting hinge 254 to rotate towards one side of the flexible member 30 along the first virtual axis L1, the first guide rail rods 275 respectively slide in the two first guide sliding grooves 2556 of the first connecting hinge 254, so as to push the positioning member 25760 to slide towards the position far from the corresponding first guide rail rod 275, and the elastic member 25765 elastically deforms until the clamping block 25761 of the positioning member 25760 is clamped into the corresponding positioning opening 2758; meanwhile, the two transmission rods 2621 slide in the transmission grooves 25514 of the first hinge joint 254, and since the two transmission members 262 of each folding-assist assembly 24 are connected by the linkage 28, when the transmission rod 2621 connected between the first hinge joint 254 and the linkage 28 rotates, the corresponding first shaft 281 can be driven to rotate, the first shaft 281 is driven to rotate by the linkage 282, the first shaft 281 on the other side is driven to rotate by the first shaft 281 on the other side, the first shaft 281 on the other side rotates to drive the transmission rod 2621 connected between the second hinge joint 257 and the linkage 28 to rotate, so that the second hinge joint 257 synchronously rotates away from the first hinge joint 255, the second hinge joint 257 drives the second guide rail rod 277 to slide in the second sliding groove 2570, the second guide rail 277 slidably pushes the corresponding positioning member 25760 to slide away from the second guide rail 275, the elastic member 25765 elastically deforms until the fixture block 25761 of the positioning member 25760 is clamped into the corresponding positioning opening 2778, the two second guide rails 277 of each of the folding assist assemblies 24 are also moved away from each other until the folding device 22 is in the unfolded state. The bendable region 31 of the flexible element 30 is flattened with the folding device 22.

In another way of flattening the electronic apparatus 100, only the second frame 23 may be applied with a force of pulling outward, and the second frame 23 may be flattened by the folding device 22.

In other bending modes of the electronic device 100, a force for pulling the first frame 21 and the second frame 23 outward may be applied to the first frame 21 and the second frame 23 simultaneously, and the first frame 21 and the second frame 23 respectively drive the corresponding connecting hinge and the corresponding supporting hinge 253 to rotate along the corresponding second connecting shaft 265 toward one side of the flexible member 30, so as to flatten the electronic device 100.

The foregoing is illustrative of embodiments of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the embodiments of the present invention and are intended to be within the scope of the present invention.

Claims

1. A folding device is characterized by comprising a bending mechanism, a sliding part and a falling limiting mechanism, wherein the falling limiting mechanism comprises a connecting part for connecting the bending mechanism and the sliding part, the sliding part comprises a first limiting part, the bending mechanism can drive the connecting part to move relative to the sliding part when bending, and when the bending mechanism bends, the connecting part moves relative to the sliding part towards the first limiting part until the connecting part abuts against or is close to the first limiting part to limit the sliding part to move relative to the bending mechanism towards the bending mechanism so as to prevent the sliding part from collapsing on the bending mechanism when the folding device falls.

2. The folding apparatus of claim 1 wherein said slider member is connected to said foldable mechanism by an elastic member; when the bending mechanism bends, the sliding part slides relative to the bending mechanism to compress the elastic part.

3. The folding apparatus of claim 1 wherein said foldable mechanism includes a central hinge and connecting hinges pivotally connected to opposite sides of said central hinge.

4. The folding apparatus of claim 3, further comprising a transmission mechanism connecting the middle hinge and the connecting hinge for moving the connecting hinge relative to the middle hinge.

5. The folding apparatus of claim 4, wherein a first end of said drive mechanism is pivotally connected to said central hinge joint and a second end of said drive mechanism is slidably connected to said connecting hinge joint.

6. A folding apparatus according to claim 5, wherein the sliding movement of the drive relative to the connecting joint comprises a first sliding component directed away from or towards the central joint and a second sliding component perpendicular to the first sliding component.

7. The folding apparatus of claim 5, wherein the connection of the fall arrest mechanism comprises a linkage pivotally connected to the central hinge and a link connecting the linkage to the slider.

8. The folding apparatus of claim 5, wherein the flexible mechanism includes a second stop portion disposed on the connecting hinge, and when the flexible mechanism is unfolded, the connecting mechanism slides relative to the connecting hinge to drive the connecting rod to move relative to the flexible mechanism toward the second stop portion until the connecting rod approaches or abuts against the second stop portion to limit the sliding member from moving relative to the flexible mechanism toward the flexible mechanism.

9. The folding apparatus of claim 8 wherein said linkage comprises a first linkage and a second linkage; the first end of the first connecting rod is rotatably connected to the connecting mechanism, and the first end of the second connecting rod is rotatably connected to the sliding part; the second end of the first link is rotatably connected to the second end of the second link.

10. The folding apparatus of claim 8, wherein the flexible mechanism is configured to flex such that the connecting mechanism slides relative to the connecting hinge in a first direction until the first stop is stopped by the connecting mechanism in a second direction opposite the first direction.

11. The folding apparatus of claim 9 wherein the first end of the second link moves in a direction opposite the direction of movement of the first end of the first link relative to the connecting hinge when the foldable mechanism is folded.

12. The folding apparatus of claim 9 wherein the first end of the first link moves a greater distance relative to the connecting hinge than the first end of the second link moves relative to the connecting hinge when the foldable mechanism is folded.

13. The folding apparatus of claim 9 wherein the angle formed between the first link and the second link increases during the bending of the bendable mechanism.

14. The folding apparatus of claim 9 wherein said connecting hinge defines a channel, said connecting mechanism extending into said channel; the connecting rod is arranged in the through groove.

15. The folding apparatus of claim 14, wherein the second restraint portion is formed on an inner wall of the through slot.

16. The folding apparatus of claim 14, wherein the first end of the first link abuts against or is close to the second position-limiting portion when the foldable mechanism is in the unfolded state, and the first end of the first link is far from the second position-limiting portion when the foldable mechanism is in the folded state.

17. The folding apparatus of claim 9, wherein the connecting mechanism is disposed adjacent to or against the first position-limiting portion when the bendable mechanism is in the folded state, and wherein the connecting mechanism is disposed away from the first position-limiting portion when the bendable mechanism is in the unfolded state.

18. The folding apparatus of claim 1, further comprising a first frame and a second frame for attaching the flexible screen, the sliding member being located on one side of the foldable mechanism, the sliding member being connected to the first frame, and the foldable mechanism being connected to the second frame on an opposite side of the foldable mechanism from the sliding member.

19. The folding apparatus of claim 18 wherein the other side of said foldable mechanism is fixedly attached to a first frame; the sliding piece is fixedly connected with the second frame body.

20. The folding apparatus as claimed in claim 4, further comprising a linkage mechanism, wherein the linkage mechanism is connected to the transmission mechanism, and when the connecting joint on one side rotates, the transmission mechanism on the same side is driven to rotate, and the transmission mechanism drives the transmission mechanism on the other side to rotate through the linkage mechanism, and then drives the connecting joint on the other side to rotate.

21. The folding apparatus of claim 5, wherein the drive mechanism is pivotally connected to the central hinge about a solid axis and the linkage mechanism is pivotally connected to the central hinge about a virtual axis.

22. A folding apparatus according to claim 4, wherein the path of movement of the drive means relative to the connecting hinge when the folding means is folded includes an arc.

23. An electronic device, comprising a flexible member, a housing and the folding device according to any one of claims 1 to 22, wherein the housing comprises a first frame and a second frame, the folding device is disposed between the first frame and the second frame, the flexible member is disposed on the housing and the folding device, and the flexible member is bent or flattened along with the folding device.