WO2023078026A1

WO2023078026A1 - Foldable apparatus and electronic device

Info

Publication number: WO2023078026A1
Application number: PCT/CN2022/124234
Authority: WO
Inventors: 詹雪超; 史长春; 成功
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-11-08
Filing date: 2022-10-10
Publication date: 2023-05-11
Also published as: CN116085378A

Abstract

The present application provides a foldable apparatus, which is used for supporting a flexible screen. The foldable device comprises a bendable mechanism and a folding aid component; the bendable mechanism comprises a middle hinge and two rotatable hinges that are connected to two opposite sides of the middle hinge; a flexible screen is attached to front surfaces of the middle hinge and the rotatable hinges; the folding aid component comprises a linkage mechanism and a limiting mechanism, the linkage mechanism being connected to the middle hinge and the two rotatable hinges; the limiting mechanism comprises a push piece, an abutting piece and an elastic piece that are provided on the linkage mechanism; the elastic piece provides an elastic force for mutual butting between the abutting piece and the push piece; the rotatable hinges rotate relative to the middle hinge by means of the linkage mechanism so as to achieve flattening or bending of the bendable mechanism; and the push piece rotates relative to the abutting piece, and the frictional resistance between the push piece and the abutting piece may allow the rotatable hinges to be positioned relative to the middle hinge at specific angles. The present application further provides an electronic device that is provided with said foldable apparatus.

Description

Folding devices and electronic equipment

This application claims the priority of the patent application with application number 202111316158.6 and application title "folding device and electronic equipment" submitted to the China Patent Office on November 08, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the field of flexible screen support, in particular to a folding device for supporting a flexible screen and electronic equipment provided with the folding device.

Background technique

With the development of display equipment, a bendable and flexible display screen has appeared, so that foldable electronic devices such as foldable mobile phones and foldable display monitors can be designed. The flexible display screen generally supports the bending part of the flexible display screen through a hinge mechanism. However, the existing foldable electronic devices generally only have two states of unfolded or folded, and cannot realize multi-angle positioning of the foldable electronic device.

Explanation content

The first aspect of the present application provides a folding device for supporting a flexible screen. The folding device includes a bendable mechanism and a folding aid assembly. The bendable mechanism includes a middle hinge and a hinge connected to the middle hinge. Two rotating hinges on opposite sides, the flexible screen is attached to the middle hinge and the rotating hinge; the folding aid assembly includes a linkage mechanism and a limit mechanism, and the linkage mechanism is connected to the The middle hinge and the two rotating hinges; the limit mechanism includes a push piece, a support piece and an elastic piece arranged on the linkage mechanism, and the elastic piece provides the support piece and the support piece The elastic force between the pushing pieces against each other, the rotating hinge rotates relative to the middle hinge through the linkage mechanism; the pushing piece rotates relative to the resisting piece, and the pushing piece and the The frictional resistance between the abutting parts enables the positioning of the rotary hinge at a specific angle relative to the middle hinge.

The second aspect of the present application also provides an electronic device, which includes a flexible screen, a casing, and a folding device, the casing includes two frames, and the folding device is arranged between the two frames, so The folding device includes a bendable mechanism and a folding aid assembly, the bendable mechanism includes a middle hinge and two rotating hinges connected to opposite sides of the middle hinge, the flexible screen is attached to the The middle hinge and the rotating hinge; the folding aid assembly includes a linkage mechanism and a limiting mechanism, and the linkage mechanism is connected to the middle hinge and the two rotating hinges; the limiting mechanism includes a set In the pushing piece, the holding piece and the elastic piece of the linkage mechanism, the elastic piece provides the elastic force against each other between the holding piece and the pushing piece, and the rotating hinge passes through the linkage The mechanism rotates relative to the middle hinge; the resisting member rotates relative to the resisting member, and the frictional resistance between the resisting member and the resisting member can make the rotating hinge relative to the resisting member The middle hinge is positioned at a specific angle, the flexible screen is arranged on the housing and the folding device, and the flexible screen is bent or flattened with the folding device.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the implementation manner. Obviously, the drawings in the following description are some implementation manners of the application, and are common to those skilled in the art. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic diagram of a three-dimensional structure of an electronic device in one embodiment of the present application;

FIG. 2 is an exploded schematic diagram of a three-dimensional structure of a casing and a flexible screen of the electronic device in FIG. 1;

FIG. 3 is a schematic perspective view of the three-dimensional structure of the folding device of the electronic device in FIG. 2;

Fig. 4 is a schematic perspective view of the three-dimensional structure of the folding device in Fig. 3;

Fig. 5 is an exploded schematic diagram of a part of the three-dimensional structure of the folding device in Fig. 3;

Fig. 6 is a schematic perspective view of the three-dimensional structure of the folding device in Fig. 5;

Fig. 7 is an exploded schematic diagram of a further three-dimensional structure of the folding device in Fig. 5;

Fig. 8 is an exploded schematic diagram of a further three-dimensional structure of the folding device in Fig. 6;

Fig. 9 is a three-dimensional exploded schematic diagram of the bendable mechanism in Fig. 8;

Fig. 10 is a schematic perspective view of the three-dimensional structure of the bendable mechanism in Fig. 9;

Fig. 11 is an enlarged schematic view of the three-dimensional structure of one of the folding assisting components in Fig. 8;

Fig. 12 is a schematic perspective view of the three-dimensional structure of the folding aid assembly in Fig. 11;

Fig. 13 is an exploded schematic view of the three-dimensional structure of the folding aid assembly in Fig. 11;

Fig. 14 is an exploded perspective view of the three-dimensional structure of the folding aid assembly in Fig. 12;

Fig. 15 is an exploded perspective view of the three-dimensional structure of the linkage mechanism and the limit mechanism in Fig. 13;

Fig. 16 is an exploded perspective view of the three-dimensional structure of the linkage mechanism and the limit mechanism in Fig. 14;

Fig. 17 is a schematic perspective view of the assembled linkage mechanism and the limit mechanism in Fig. 15;

Figure 18 is a front view of the linkage mechanism in Figure 17;

Fig. 19 is a schematic perspective view of the first bending state of the linkage mechanism in Fig. 17;

Fig. 20 is a schematic cross-sectional view of the linkage mechanism in Fig. 19 in the first bending state;

Fig. 21 is a schematic perspective view of the second bending state of the linkage mechanism in Fig. 17;

Fig. 22 is a schematic cross-sectional view of the linkage mechanism in Fig. 21 in a second bending state;

Fig. 23 is a three-dimensional exploded schematic view of the rotation assisting mechanism and part of the bending mechanism of one of the folding assisting components in Fig. 7;

Fig. 24 is a perspective view of the three-dimensional structure of the rotation-assist mechanism and the bendable mechanism in Fig. 23;

Fig. 25 is a perspective sectional schematic view of the folding device in Fig. 3;

Figure 26 is a front view of the folding device in Figure 25;

Fig. 27 is a perspective sectional schematic view of the folding device in Fig. 4;

Figure 28 is a front view of the folding device in Figure 27;

Fig. 29 is a schematic structural view of the electronic device in Fig. 1 when it is bent at 90 degrees;

FIG. 30 is a schematic perspective view of the three-dimensional structure of the folding device of the electronic device in FIG. 29;

Fig. 31 is a schematic cross-sectional view of the folding device in Fig. 30 at the linkage mechanism;

Fig. 32 is a schematic cross-sectional view of the folding device in Fig. 30 at the rotation-assisting mechanism;

Fig. 33 is a schematic structural view of the electronic device in Fig. 1 when it is bent 180 degrees;

Fig. 34 is a schematic perspective view of the three-dimensional structure of the folding device of the electronic device in Fig. 33;

Fig. 35 is a schematic cross-sectional view of the folding device in Fig. 34 at the linkage mechanism;

Fig. 36 is a schematic cross-sectional view of the folding device in Fig. 34 at the rotation assisting mechanism.

Detailed ways

A folding device for supporting a flexible screen, the folding device comprising:

A bendable mechanism, the bendable mechanism includes a middle hinge and two rotating hinges connected to opposite sides of the middle hinge, the flexible screen is attached to the middle hinge and the rotating hinge section; and

A folding aid assembly, the folding aid assembly includes a linkage mechanism and a limit mechanism, the linkage mechanism is connected to the middle hinge and the two rotating hinges; the limit mechanism includes a A push piece, a hold piece and an elastic piece, the elastic piece provides the elastic force between the push piece and the push piece, and the rotating hinge is relatively The hinge rotates; the pushing member rotates relative to the resisting member, and the frictional resistance between the pushing member and the resisting member can make the rotating hinge be positioned at a position relative to the middle hinge specific angle.

During the bending process of the folding device from 0° to 90°, the resisting member pushes the resisting member to slide, and the resisting member presses the elastic member to gradually compress the elastic member. increase, the elastic force of the elastic member gradually increases; during the bending process of the folding device from 90 degrees to 180 degrees, the elastic member elastically resists the slide of the resisting member, and the compression amount of the elastic member gradually decreases, the elastic force of the elastic member gradually decreases.

The resisting member includes a first cam, the resisting member includes a second cam, and the first cam and the second cam rotatably resist each other.

The friction torque between the first cam and the second cam is greater than the rebound force of the flexible screen, so that the rotating hinge is positioned at a specific angle relative to the middle hinge.

The linkage mechanism includes two rotating shafts, two connecting rods respectively connected to the two rotating shafts, and a gear combination between the two connecting rods, each connecting rod is provided with an engaging The first gear of the above-mentioned gear combination, each link member is connected with the said resisting member, so that the two first cams are sleeved on the two rotating shafts respectively, and the resisting member includes two of the first cams Two cams, the two second cams are slidably sleeved on the two rotating shafts, the two connecting rods are respectively connected to the two rotating hinges, and the connecting rods rotate with the The hinge rotates to drive the rotating shaft and the first cam to rotate relative to the second cam.

The first cam and the first gear share the same rotation axis, and the diameter of the pitch circle of the first gear is larger than the outer diameter of the first cam.

The linkage mechanism also includes a first positioning piece, and the limit mechanism also includes a second positioning piece, the first positioning piece is connected to one end of the two rotating shafts, and the second positioning piece is connected to two At the other end opposite to the rotating shaft, the link member, the resisting member, the resisting member and the elastic member are located between the first positioning member and the second positioning member.

The resisting member also includes a connecting portion and two second cams arranged at opposite ends of the connecting portion, the elastic member is located between the second positioning member and the resisting member, and the rotating The shaft can rotate relative to the resisting piece.

The limiting mechanism further includes a friction member fixedly sheathed on the rotating shaft, and the friction member is clamped between the second positioning member and the elastic member.

The sum of the friction torque between the first cam and the second cam and the friction resistance of the two friction members is greater than the rebound force of the flexible screen, so that the rotation hinge relative to the middle hinge Sections are positioned at specific angles.

The limiting mechanism further includes a gasket, which is slidably sleeved on the two rotating shafts, and the gasket is located between the elastic member and the friction member.

The elastic member includes a first spring sleeved on each of the rotating shafts, and the axial force on the first cam, the second cam and the friction member on each of the rotating shafts is equal to the Describe the elastic force of the first elastic member.

The elastic member also includes a second spring located between the washer and the resisting member, the first cam on each of the rotating shafts, the second cam and the friction member The axial force is equal to the elastic force of the first elastic member plus half of the elastic force of the second spring.

The gear combination includes two second gears meshing with each other, the first gears of the two connecting rods mesh with the two second gears respectively, and the diameter of the pitch circle of the second gears is smaller than the diameter of the second gears. The diameter of the pitch circle of the first gear.

The first cam is provided with a first protrusion and a first depression along its circumference, the second cam is provided with a second protrusion and a second depression along its circumference, and the first protrusion and the The second concave part cooperates, and the second protruding part cooperates with the second concave part.

The folding-assisting assembly further includes a rotation-assisting mechanism connected to the end of the linkage mechanism away from the limit mechanism, the rotation-assisting mechanism includes a rotating member, and the first end of the rotating member is rotatably connected to the middle hinge The opposite second end of the rotating member is connected to the rotating hinge, and the rotating hinge rotates relative to the middle hinge to drive the rotating member to rotate relative to the middle hinge.

The rotation axis between the rotating member and the middle hinge is parallel to the axis of the rotation shaft, and the rotation axis is closer to the middle hinge than the axis.

The rotating part includes a rotating part, the rotating part is arranged at the first end of the rotating part, the rotating part includes a circular arc-shaped first rotation-assisting surface, and the middle hinge is provided with the first A first arc surface matched with the rotation-assisting surface, and the first rotation-assisting surface is collinear with the axis of the first arc surface.

The rotation part also includes a second rotation-assisting surface away from the first rotation-assisting surface, and the second rotation-assisting surface is parallel to the rotation-assisting surface; the rotation-assisting mechanism also includes a joint connected to the middle hinge The mounting part, the connecting part is clamped between the mounting part and the middle hinge, and the mounting part is provided with a second arc surface matched with the second rotation-assisting surface.

An electronic device, which includes a flexible screen, a casing, and a folding device, the casing includes two frames, the folding device is arranged between the two frames, and the folding device includes a bendable mechanism and a folding aid assembly, the bending mechanism includes a middle hinge and two rotating hinges connected to opposite sides of the middle hinge, and the flexible screen is attached to the middle hinge and the rotating hinge section; the folding aid assembly includes a linkage mechanism and a limit mechanism, and the linkage mechanism is connected to the middle hinge and the two rotating hinges; the limit mechanism includes a resisting mechanism arranged on the linkage mechanism piece, abutting piece and an elastic piece, the elastic piece provides the elastic force between the abutting piece and the pushing piece, and the rotating hinge is relative to the middle hinge through the linkage mechanism Rotation; the resisting member rotates relative to the resisting member, and the frictional resistance between the resisting member and the resisting member can position the rotating hinge at a specific angle relative to the middle hinge , the flexible screen is arranged on the casing and the folding device, and the flexible screen is bent or flattened along with the folding device.

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In addition, the following descriptions of the various embodiments refer to the attached drawings to illustrate specific embodiments that the application can be used to implement. The directional terms mentioned in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., only is to refer to the direction of the attached drawings. Therefore, the direction terms used are for better and clearer description and understanding of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, and must have a specific orientation. construction and operation, therefore should not be construed as limiting the application.

In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection", and "set on..." should be understood in a broad sense, for example, it can be A fixed connection can also be a detachable connection or an integral connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Please refer to FIGS. 1 to 6 together. FIG. 1 is a schematic diagram of the three-dimensional structure of an electronic device 100 in one embodiment of the present application; FIG. 2 is a three-dimensional structure of the housing 20 and the flexible screen 30 of the electronic device 100 in FIG. 1 Exploded schematic diagram; FIG. 3 is a schematic perspective view of the three-dimensional structure of the folding device 50 of the electronic device 100 in FIG. 2; FIG. An exploded schematic view of a part of the three-dimensional structure of the device 50 ; FIG. 6 is a schematic three-dimensional structure view of another viewing angle of the folding device 50 in FIG. 5 . An electronic device 100 in one embodiment of the present application includes a casing 20 , a folding device 50 , and a flexible screen 30 disposed on the casing 20 and the folding device 50 . The casing 20 includes two frames 21 , and the folding device 50 is connected between the two frames 21 . The flexible screen 30 is disposed on the two frames 21 and the folding device 50 . The flexible screen 30 includes a bendable area 31 corresponding to the folding device 50 , and two non-bendable areas 33 connected to opposite sides of the bendable area 31 . The folding device 50 is used to support the bendable area 31 of the flexible screen 30, the flexible screen 30 is bent or flattened with the folding device 50, and the bendable area 31 can be bent to form a U shape or a water drop shape or other shapes. In this embodiment, the bendable region 31 can be bent into a drop shape.

Please refer to FIG. 7 and FIG. 8 . FIG. 7 is a further three-dimensional exploded schematic view of the folding device 50 in FIG. 5 ; FIG. 8 is a further three-dimensional exploded schematic view of the folding device 50 in FIG. 6 . The folding device 50 includes a bendable mechanism 52 and a folding aid assembly 54 connected to the bendable mechanism 52; the number of the folding aid assembly can be two or more, and in this embodiment, the number of the folding aid assembly 54 There are three, wherein two of the folding assisting components 54 are arranged at opposite ends of the back of the bendable mechanism 52 , and the other of the folding assisting assemblies 54 is arranged at the middle of the back of the bending mechanism 52 . The bendable mechanism 52 includes a middle hinge 521 and two rotating hinges 523 connected to opposite sides of the middle hinge 521, and the flexible screen 30 is attached to the middle hinge 521 and the rotating hinge 523; Specifically, the back of the flexible screen 30 is attached to the front of the middle hinge 521 and the rotating hinge 523 . Each folding aid assembly 54 includes linkage mechanism 55, position limiting mechanism 56 and rotation aiding mechanism 57, linkage mechanism 55 is located between spacing mechanism 56 and rotation assistance mechanism 57; linkage mechanism 55 is connected to described middle hinge 521 and two The rotating hinge 523; the limit mechanism 56 includes a resisting member 562, a resisting member 563 and an elastic member 565 provided on the linkage mechanism 55, and the elastic member 565 provides the contact between the resisting member 563 and the resisting member 563. The elastic force against each other between the push pieces 562; the rotating hinge 523 rotates relative to the middle hinge 521 through the linkage mechanism 55, specifically, one of the rotating hinges 523 rotates relative to the middle hinge 521 The rotation drives the other rotating hinge 523 to rotate synchronously relative to the middle hinge 521 through the linkage mechanism 55, so as to realize flattening or bending of the bendable mechanism 52; The resisting member 563 rotates, and the frictional resistance between the resisting member 562 and the resisting member 563 enables the rotating hinge 523 to be positioned at a specific angle relative to the middle hinge 521 .

In some embodiments, the folding device 50 includes two folding assisting components 54 , and the two folding assisting components 54 are disposed at opposite ends of the bending mechanism 52 on the back.

In some embodiments, the folding device 50 includes one or more than three folding assisting components 54 , and the folding assisting components 54 are disposed on the back of the bending mechanism 52 .

In this embodiment, the front side refers to the side facing the same direction as the light-emitting surface of the flexible screen 30 , and the back side refers to the side facing away from the light-emitting side of the flexible screen 30 . 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 TV, a smart watch, a VR head-mounted display, a vehicle display, and any other products and components with display functions. The "connection" in the description of the embodiments of the present application includes both direct connection and indirect connection. For example, the connection between A and B includes direct connection between A and B or connection through a third element C or more other elements. The connection also includes two cases of integrated connection and non-integrated connection. The integrated connection means that A and B are formed and connected in one piece, and the non-integrated connection means that A and B are formed and connected in a non-integrated manner.

The folding device 50 of the electronic device 100 of the present application includes a bendable mechanism 52 and a folding assisting component 54. The folding assisting component 54 includes a linkage mechanism 55 and a limiting mechanism 56 connected to the linkage mechanism 55. The limiting mechanism The elastic part 565 of the mechanism 56 elastically pushes the holding part 563 against the pushing part 562; when the bendable mechanism 52 is bent, one of the rotating hinges 523 is bent relative to the middle hinge 521 The linkage mechanism 55 drives another rotating hinge 523 to bend synchronously relative to the middle hinge 521 to realize the bending of the bendable mechanism 52 , and the resisting member 562 and the resisting member The frictional resistance between 563 can make the rotating hinge 523 be positioned at a specific angle relative to the middle hinge 521 , that is, the included angle between the two rotating hinges 523 is a specific angle between 0° and 180°. When the bendable mechanism 52 is flattened, one of the rotating hinges 523 is flattened relative to the middle hinge 521 through the linkage mechanism 55 to drive the other rotating hinge 523 to unfold synchronously relative to the middle hinge 521. flat, so as to realize the flattening of the bendable mechanism 52, and the frictional resistance between the resisting member 562 and the resisting member 563 can position the rotating hinge 523 relative to the middle hinge 521 To a specific angle, that is, the angle between the two rotating hinges 523 is a specific angle between 180 degrees and 0 degrees. Therefore, the bendable mechanism 52 can achieve multi-angle definition in the process of bending or flattening, so that the flexible screen 30 attached to the bendable mechanism 52 can be bent with the bendable mechanism 52 In the process of bending or flattening, it can achieve multi-angle limitation, which is convenient to use and improves user experience.

Please refer to FIGS. 7-10 together. FIG. 9 is an exploded perspective view of the bendable mechanism 52 of the folding device 50 in FIG. 8; FIG. 10 is a perspective view of the bendable mechanism 52 in FIG. 9 from another perspective Schematic. The middle hinge 521 includes a strip-shaped first hinge body 5210 and a cover body 5218 connected to the back of the first hinge body 5210. The first hinge body 5210 includes a front surface and a back surface 5211 facing away from the front surface. The back surface 5211 of the segment body 5210 is provided with a positioning area 5212 for positioning the folding aid assembly 54 . In this embodiment, the back surface 5211 of the first joint body 5210 is provided with three first connection regions 5212, wherein two first connection regions 5212 are located at opposite ends of the back surface 5211 of the first joint body 5210, and the other first connection region 5212 is The connection area 5212 is located in the middle of the back surface 5211 of the first hinge body 5210, and the three folding assisting components 54 are respectively connected to the three first connection areas 5212. Each first connecting area 5212 includes a first mounting portion 5213, a second mounting portion and a third mounting portion located at opposite ends of the first mounting portion 5213, the first mounting portion 5213 corresponds to the linkage mechanism 55 of the folding assisting assembly 54, the The second installation part corresponds to the limit mechanism 56 of the folding aid assembly 54, and the third installation part corresponds to the rotation aid mechanism 57; the opposite sides of the first installation part 5213 are respectively provided with avoidance grooves 52130, and the two avoidance The slots 52130 are used to respectively accommodate partial structures of the linkage mechanism 55 . The second mounting part is provided with a receiving groove 5214 for receiving the resisting part 563 and the elastic part 565 , and the end of the second mounting part away from the first mounting part 5213 is provided with a connecting hole 5215 . The third mounting part is provided with a first arc surface 5216, specifically, two opposite sides of the third mounting part are respectively provided with two first arc surfaces 5216, and the third mounting part is also provided with Several connection holes 5215 are provided. Stoppers 5217 protrude from the first hinge body 5210 on opposite sides of one end of each first connection area 5212 . The cover body 5218 is a bar-shaped frame, and the inner surface of the cover body 2518 is provided with several support blocks 2519 and some spacers spaced apart along its length direction. When the cover body 2518 covers the back side of the first joint body 5210, the support block 2519 abuts against the back of the first hinge body 2510 , and several of the pads respectively abut against the folding-assisting assembly 54 , so that the connection between the folding-assisting assembly 54 and the bending mechanism 52 is firmer.

Each rotating joint 523 includes a bar-shaped second joint body 5230 and a second connection area 5232 disposed on the back surface 5231 of the second joint body 5230 . In this embodiment, the back surface 5231 of the second joint body 5230 is provided with three second connection regions 5232, wherein two second connection regions 5232 are located at opposite ends of the second joint body 5230, and the other second connection region 5232 Located in the middle of the second hinge body 5230 , the second connecting area 5232 is used to connect the linkage mechanism 55 and the rotation-assisting mechanism 57 of the corresponding folding-assisting assembly 54 . Each second connection area 5232 includes a first connection portion 5233 and a second connection portion 5236, the first connection portion 5233 and the second connection portion 5236 are arc blocks arranged on the back surface 5231, the first connection portion 5233 There is an arc-shaped first slide guide groove 5234, which passes through the first connecting portion 5233 along the length direction of the rotating hinge 523; the second connecting portion 5236 is provided with an arc-shaped second guide slide groove 5234. The axis line of the first sliding groove 5237 is parallel to the axis line of the second guiding groove 5237 , and the first sliding groove 5234 is closer to the middle hinge 521 than the second guiding groove 5237 . The side of the second hinge body 5230 close to the middle hinge 521 is provided with a stop groove 5235 between every two adjacent second connection regions 5232 , and the stop groove 5235 corresponds to the stop block 5217 .

Please refer to FIGS. 11-16 together. FIG. 11 is an enlarged schematic view of the three-dimensional structure of one of the folding assisting components 54 of the folding device 50 in FIG. 8; FIG. 12 is a three-dimensional structure of the folding assisting component 54 in FIG. 11 from another perspective Schematic diagram; FIG. 13 is an exploded schematic diagram of the three-dimensional structure of the folding aid assembly 54 in FIG. 11; FIG. 14 is an exploded schematic diagram of the three-dimensional structure of the folding assistance assembly 54 in FIG. 12; FIG. 15 is a schematic diagram of the linkage mechanism 55 and the limiting mechanism in FIG. 56 is an exploded schematic diagram of the three-dimensional structure; FIG. 16 is an exploded schematic diagram of the three-dimensional structure of the linkage mechanism 55 and the limit mechanism 56 in FIG. 14 . The resisting member 562 includes a first cam 5620, and the resisting member 563 includes a second cam 5630, and the first cam 5620 and the second cam 5630 are rotatably opposed to each other; when the first cam 5620 rotates relative to the second cam 5630, the second cam 5630 A cam 5620 rotatably pushes the second cam 5630 away from or close to the slide of the first cam 5620, the elastic member 565 is squeezed, and the friction resistance between the first cam 5620 and the second cam 5630 can make the push member 562 is limited to a specific angle relative to the resisting member 563 . Specifically, the first cam 5620 includes a circular sleeve and a concave-convex surface at one end of the sleeve, the concave-convex surface includes a first protrusion 5624 and a first depression 5625, the first protrusion 5624 and The first recesses 5625 are sequentially arranged at intervals along the circumferential direction of the sleeve. The quantity of the first protruding part 5624 and the quantity of the first recessed part 5625 can be set according to needs, as the first cam 5620 can comprise a first protruding part 5624 and a first recessed part 5625, two first protruding parts 5624 and two first recesses 5625, three first protrusions 5624 and three first recesses 5625, or four first protrusions 5624 and four first recesses 5625, etc.

As shown in Figure 15 and Figure 16, the linkage mechanism 55 includes two rotating shafts 551, two connecting rods 552 respectively connected to the two rotating shafts 551, and a connecting rod between the two connecting rods 552. The gear assembly 554 , each link member 552 is provided with a first gear 5521 engaged with the gear assembly 554 , and the diameter of the pitch circle of the first gear 5521 is larger than the outer diameter of the first cam 5620 . Each link member 552 is connected with the resisting member 562 , and the two first cams 5620 are sleeved on the two rotating shafts 551 respectively. The resisting member 563 includes two second cams 5630, and the two second cams 5630 are respectively slidably sleeved on the two rotating shafts 551, and the two connecting rods 552 are away from the first cams. One end of the 5620 is respectively connected to the two rotating hinges 523, and the connecting rod 552 rotates with the rotating hinges 523 relative to the middle hinge 521 to drive the rotating shaft 551 and the first cam 5620 to face each other. Rotate on the second cam 5630.

Specifically, the rotating shaft 551 includes a shaft body 5510 and a positioning ring 5512 located at one end of the shaft body 5510. The shaft body 5510 is provided with a positioning portion 5513 near the positioning ring 5512, and the connecting rod 552 passes through the positioning portion. 5513 is fixedly connected with the rotating shaft 551 ; in this embodiment, the positioning portion 5513 is a positioning surface provided on the outer wall of the shaft body 5510 and extending along the axial direction of the shaft body 5510 . One end of the shaft body 5510 close to the positioning ring 5512 forms a connecting section 5515, and the connecting section 5515 is used to connect to the rotation assist mechanism 57; The outer peripheral wall of the shaft body 5510 forms a circle along the circumference of the shaft body 5510 .

The connecting rod 552 also includes a sleeve 5522 and a connecting rod 5523 connected to the outer peripheral wall of the sleeve 5522. The sleeve 5522 is used to be sleeved on the shaft body 5510, and the pusher 562 is connected to one end of the sleeve 5522. Specifically , the sleeve of the first cam 5620 is connected to the sleeve 5522, and the sleeve of the first cam 5620 is coaxial with the sleeve 5522, and the outer diameter of the sleeve 5522 is larger than the outer diameter of the sleeve of the first cam 5620 . The first gear 5521 is disposed on the outer peripheral wall of the sleeve 5522 , specifically, the first gear 5521 is located on a side away from the connecting rod 5523 , and the axis of the first gear 5521 is collinear with the axis of the sleeve 5522 . In this embodiment, the rotation angle of the teeth of the first gear 5521 along the circumferential direction of the sleeve 5522 is 90 degrees, that is, the first gear 5521 is provided on a quarter of the outer peripheral wall of the sleeve 5522; preferably, The first gear 5521 has 14 teeth arranged around the sleeve 5522 for one revolution. The resisting member 562 is disposed on the end of the sleeve 5522 away from the first gear 5521 , and the axis of the sleeve 5522 is collinear with the axis of the first cam 5620 of the resisting member 562 . The sleeve 5522 has a waist-shaped shaft hole 5524 , and the rotating shaft 551 can be positioned on the positioning portion 5513 after being inserted into the shaft hole 5524 of the sleeve 5522 . Two opposite sides of the connecting rod 5523 are respectively protruded with guiding bars 5525 , and the guiding bars 5525 extend along the length direction of the connecting rod 5523 .

The gear combination 554 includes two second gears 5542 meshing with each other. The first gears 5521 of the two connecting rods 552 mesh with the two second gears 5542 respectively. The diameter of the pitch circle of the second gears 5542 is smaller than The diameter of the pitch circle of the first gear 5521 , and the number of teeth surrounding a circle of the second gear 5542 is less than the number of teeth surrounding a circle of the first gear 5521 . In this embodiment, the number of teeth in one revolution of the first gear 5521 is 14, and the number of teeth in one revolution of the second gear 5542 is 10. Under the certain width and height space of the rotating shaft 551, the diameter of the pitch circle of the first gear 5521 can be increased by two second gears 5542 arranged between the two rotating shafts 551, so that the first cam 5620 can be enlarged The outer diameter of the first cam 5620 and the second cam 5630 can provide greater friction torque, and can reduce the fatigue wear of the first cam 5620, thereby prolonging the service life of the first cam 5620. The gear assembly 554 further includes two rotating shafts 5544, and the two second gears 5542 are fixedly sleeved on the middle parts of the two rotating shafts 5544, respectively. A stop ring 5545 is provided on the outer peripheral wall of the rotating shaft 5544 near one end thereof, and a locking groove 5547 is provided on the other end of the outer peripheral wall of the rotating shaft 5544 away from the stop ring 5545 .

The linkage mechanism 55 also includes a first positioning member 555, and the limit mechanism 56 also includes a second positioning member 566, the first positioning member 555 is connected to one end of the two rotating shafts 551, and the second positioning member 566 is connected to two rotating shafts. The opposite end of the shaft 551; the connecting rod member 552, the resisting member 562, the resisting member 563 and the elastic member 565 are located between the first positioning member 555 and the second positioning member 566; specifically, the first positioning member 555 is rectangular The positioning piece, the opposite ends of the rectangular positioning piece are respectively provided with through holes 5552, the middle part of the rectangular positioning piece is provided with two spaced shaft holes 5554 between the two through holes 5552, the axis of the through hole 5552 The line is parallel to the axis of the shaft hole 5554; the through hole 5552 is used for rotatably inserting the shaft body 5510, and the shaft hole 5554 is used for rotatably inserting the end of the rotating shaft 5544. Two opposite end surfaces of the first positioning member 555 are configured as arc surfaces. The linkage mechanism 55 also includes two U-shaped buckles 557 , and the buckles 557 are used to be locked into the slots 5547 of the rotating shaft 5544 .

The resisting member 563 also includes a connecting portion 5632 and two second cams 5630 disposed at opposite ends of the connecting portion 5632, the elastic member 565 is located between the second positioning member 566 and the resisting member 563, and the rotating shaft 551 can Rotating relative to the resisting member 563 , the resisting member 563 can slide along the axial direction of the rotating shaft 551 . Specifically, the second cam 5630 includes a circular sleeve and a concave-convex surface at one end of the sleeve, the concave-convex surface includes a second protrusion 5634 and a second depression 5635, the second protrusion 5634 and The second recesses 5635 are arranged at intervals along the circumference of the sleeve; The number of the 5625 and the number of the first protrusions 5624 are consistent, so that the first protrusions 5624 cooperate with the second recesses 5635 , and the second protrusions 5634 cooperate with the first recesses 5625 . The connecting portion 5632 is provided with two shaft holes 5636 , and the axis of the second cam 5630 is parallel to the axis of the shaft holes 5636 .

The second positioning piece 566 includes a rectangular positioning piece 5661, an extension rod 5663 protruding from the middle of one side of the positioning piece 5661, and an extending piece 5664 protruding from the opposite side of the positioning piece 5561; the opposite ends of the positioning piece 5661 A circular through hole 5665 is respectively provided, and the extension direction of the extension rod 5663 is parallel to the axis of the circular through hole 5665 . The opposite end surfaces of the positioning piece 5661 are configured as arc surfaces. The extension piece 5664 defines a connection hole 5667 .

The limiting mechanism 56 further includes a friction member 567 fixedly sleeved on the rotating shaft 551 , and the friction member 567 is clamped between the second positioning member 566 and the elastic member 565 . Specifically, the friction member 567 is a circular friction plate, and a positioning hole 5672 is opened in the middle of the friction plate. The friction member 567 is fixedly connected to the rotating shaft 551 through the positioning hole 5672 . Preferably, several holes 5674 are respectively provided on opposite sides of the friction member 567 , and these holes 5674 can increase the frictional resistance of the friction member 567 . In some embodiments, the two opposite sides of the friction member 567 may also be respectively provided with several protrusions, and these protrusions can increase the frictional resistance of the friction member 567 .

The limiting mechanism 56 further includes a washer 568 slidably sleeved on the two rotating shafts 551 , and the washer 568 is located between the elastic member 565 and the friction member 567 . Specifically, the spacer 568 is rectangular, and the opposite ends of the spacer 568 are respectively configured as arc surfaces. The spacer 568 has three through holes 5682 , two of which are located at opposite ends of the spacer 568 , and the other through hole 5682 is located in the middle of the spacer 568 . The limiting mechanism 56 also includes two C-shaped buckles 569 , and the C-shaped buckles 569 are used to be locked in the locking groove 5516 of the rotating shaft 551 . In this embodiment, the elastic member 565 includes a first spring 5651 and a second spring 5653 sleeved on each rotating shaft 551 , and the second spring 5653 is located between the washer 568 and the resisting member 563 .

Please refer to FIG. 15-FIG. 18 together. FIG. 17 is a schematic perspective view of the assembled linkage mechanism 55 and the limit mechanism 56 in FIG. 15 ; FIG. 18 is a front view of the linkage mechanism 55 in FIG. 17 . When assembling the linkage mechanism 55 and the limit mechanism 56, the ends of the two rotating shafts 551 away from the positioning ring 5512 are respectively inserted into the two through holes 5552 of the first positioning member 555 until the first positioning member 555 stops on the rotating shaft The positioning ring 5512 of 551; the gear assembly 554 is located between the two connecting rods 552, and the two second gears 5542 mesh with the two first gears 5521 respectively, and the stop rings 5545 of the two rotating shafts 5544 are in contact with the push The parts 562 are located on the same side; the ends of the two rotating shafts 551 away from the positioning ring 5512 are respectively inserted into the sleeves 5522 of the two connecting rod parts 552, and the two rotating shafts 5544 of the gear assembly 554 are provided with the ends of the card slots 5547 Parts are respectively inserted into the two shaft holes 5554 of the first positioning member 555 until the card slot 5547 of each rotating shaft 5544 passes through the corresponding shaft hole 5554, that is, the card slot 5547 exposes the first positioning member 555 away from the connecting rod member 552 Side; at this time, each first cam 5620 and the corresponding first gear 5521 rotate the shaft 551 together. Connect the two buckles 557 to the slots 5547 of the two rotating shafts 5544 respectively, and the buckles 557 abut against the side of the first positioning member 555 to prevent the rotating shaft 5544 from leaving the shaft hole 5554; On the two rotating shafts 551, the two second cams 5630 of the resisting member 563 and the two first cams 5620 are respectively rotatably resisted, specifically, the two rotating shafts 551 are provided with the ends of the slots 5516 Insert the inner cavities of the two second cams 5630 of the resisting member 563 respectively, and insert the two rotating shafts 5544 into the two shaft holes 5636 of the resisting member 563 respectively until the stop ring 5545 abuts against the side of the connecting portion 5632 ; The two first springs 5651 are respectively sleeved on the two rotating shafts 551, and the second spring 5653 is placed between the two first springs 5651; the gasket 568 is set on the two rotating shafts 551, so that the second A spring 5651 and a second spring 5663 are clamped between the supporting member 563 and the washer 568; the two friction members 565 are respectively sleeved on the two rotating shafts 551, and the extension rod 5663 of the second positioning member 566 is passed through After passing through the through hole 5682 in the middle of the backing ring and the gasket 568, insert it into the inner cavity of the second spring 5663, so that the ends of the two rotating shafts 551 provided with the slots 5516 pass through the two circular passages of the second positioning member 566 respectively. Hole 5665, until the slot 5516 of each rotating shaft 551 exposes the corresponding circular through hole 5665 on the side facing away from the extension rod 5663; then two C-shaped buckles 569 are respectively snapped into the slots of the two rotating shafts 551 5516. At this time, the two C-shaped buckles 569 respectively abut against the sides of the positioning piece 5661 away from the extension rod 5663, the elastic member 565 is in a squeezed state, that is, the elastic member 565 has a pre-elastic force, the first spring 5651 has a pre-elastic force F0, and the second spring 5651 has a pre-elastic force F0. The second spring 5653 has a pre-elastic force F1; each first cam 5620 can rotate against the corresponding second cam 5630, that is, the first protrusion 5624 is accommodated in the second recess 5625, and the second protrusion 5634 is accommodated In the first recess 5625; the axial force F on the first cam 5620, the second cam and 5630 and the friction member 567 on each rotating shaft 551 is equal to the pre-elastic force F0 of the first spring 5651 and the pre-elastic force of the second spring 5653 The sum of half of F1, that is, F=F0+1/2*F1.

In some embodiments, the first spring 5651 and the second spring 5653 belong to the same type, that is, the first spring 5651 and the second spring 5653 are the same, that is, both the first spring 5651 and the second spring 5653 have a pre-elastic force F0; The axial force on the first cam 5620 , the second cam 5630 and the friction member 567 on the shaft 551 is F=F0*3/2.

In some embodiments, the second spring 5653 can be omitted. At this time, the axial direction of the first cam 5620, the second cam 5630 and the friction member 567 on each rotating shaft 551 is equal to the pre-elastic force of the first elastic member 5651. , that is, F=F0.

Please refer to FIGS. 15-22 together. FIG. 19 is a schematic perspective view of the first bending state of the linkage mechanism 55 in FIG. 17; FIG. 20 is a cross-sectional view of the linkage mechanism 55 in FIG. 19 in the first bending state ; FIG. 21 is a schematic perspective view of the second bending state of the linkage mechanism 55 in FIG. 17; FIG. 22 is a cross-sectional view of the linkage mechanism 55 in FIG. 21 in the second bending state. When bending the linkage mechanism 55 from the flattened state, one of the link members 552 is bent toward the other link member 552 relative to the abutment member 563, and the one of the link members 552 is bent along the direction of the corresponding rotation axis 551. The axis rotates to drive the corresponding rotating shaft 551, the first gear 5521 and the thrust member 562 to rotate along the axis of the rotating shaft 551, that is, the rotating shaft 551 is in the through hole 5552 corresponding to the resisting member 563 Internal rotation; the rotating first gear 5521 drives the other first gear 5521 to rotate through the gear combination 554, and the rotation of the other first gear 5521 drives the corresponding rotating shaft 551, sleeve 5522, thrust member 562 and connecting The rod 5523 rotates, so that the two link members 552 of the linkage mechanism 55 are synchronously approached; at the same time, the resisting member 562 on each link member 552 rotates relative to the resisting member 563, so that the first resisting member 562 The cam 5620 rotates against the second cam, and the resisting member 563 slides along the axial direction of the rotating shaft 551 to press the elastic member 565, and the elastic member 565 elastically pushes against the gasket 568 so that the friction member 567 is clamped on the gasket 568 and the second positioning member 566 , and the friction member 567 rotates relative to the washer 568 and the second positioning member 566 along with the corresponding rotating shaft 551 .

During the above process, the axial force on the first cam 5620, the second cam 5630 and the friction member 567 on each rotating shaft 551 is equal to the sum of the elastic force of the first elastic member 5651 and half of the elastic force of the second elastic member 5653; The friction resistance between the first cam 5620 and the second cam 5630 and/or the friction resistance of the two friction members 567 can limit the two link members 552 to a specific angle between 0° and 180°. Specifically, during the bending process of the angle between the two link members 552 of the linkage mechanism 55 from 0° to 90°, the resisting member 562 pushes the resisting member 563 to slide, and the resisting member 563 pushes against the elastic member 565 The elastic deformation increases the compression amount of the elastic member 565 gradually, so that the elastic force of the elastic member 565 gradually increases, so that the friction resistance between the first cam 5620 and the second cam 5630 and the friction resistance of the friction member 567 gradually increase. Increase so that the two connecting rods 552 can be limited at a specific angle between 0° and 90°, and Fig. 19 and Fig. 20 show that the two connecting rods 552 are bent mutually and limited at 90°. During the bending process of the angle between the two link members 552 of the linkage mechanism 55 from 90 degrees to 180 degrees, the elastic member 565 elastically pushes the holding member 563 to slide along the rotation axis 551, and the compression amount of the elastic member 565 gradually Decrease, so that the elastic force of the elastic member 565 gradually decreases, so that the frictional resistance between the first cam 5620 and the second cam 5630 and the frictional resistance of the frictional member 567 are gradually reduced, but still can ensure that the two link members 552 It is limited at a specific angle between 90 degrees and 180 degrees. FIG. 21 and FIG. 22 show that the two connecting rods 552 are bent and limited at 180 degrees. The friction resistance between the first cam 5620 and the second cam 5630 on each rotating shaft 551 corresponds to torque M1, and the friction resistance of each friction surface of the friction member 567 is M2, so the total friction torque M of each rotating shaft 551 =M1+2*M2.

In other ways of use, the two connecting rods 552 can be rotated together in opposite directions, and each connecting rod 552 rotates along the axis of the corresponding rotating shaft 551 to drive the corresponding rotating shaft 551, the first gear 5521 and the pushing member 562 rotate along the axis of the rotating shaft 551; the two first gears 5521 together drive the two second gears 5542 of the gear combination 554 to rotate, so that the two link members 552 of the linkage mechanism 55 At the same time, the push piece 562 on each link member 552 rotates relative to the abutment piece 563, so that the first cam 5620 of the push piece 562 rotatably pushes against the second cam, and the abutment piece 563 rotates along the The axial sliding of the shaft 551 squeezes the elastic member 565, and the elastic member 565 elastically pushes against the washer 568 so that the friction member 567 is clamped between the washer 568 and the second positioning member 566, and the friction member 567 follows the The corresponding rotating shaft 551 rotates relative to the washer 568 and the second positioning member 566 .

When the linkage mechanism 55 is unfolded from the fully bent state, one of the connecting rods 552 is deployed away from the other connecting member 552 relative to the resisting member 563, and the one of the connecting rods 552 is extended along the direction of the rotation axis 551. The axis rotates to drive the corresponding rotating shaft 551, the first gear 5521 and the thrust member 562 to rotate along the axis of the rotating shaft 551, that is, the rotating shaft 551 rotates in the through hole 5552 corresponding to the resisting member 563 The rotating first gear 5521 drives the other first gear 5521 to rotate through the gear combination 554, and the rotation of the other first gear 5521 drives the corresponding rotating shaft 551, sleeve 5522, thrust member 562 and connecting rod 5523 Rotate, so that the two link members 552 of the linkage mechanism 55 are synchronously away from each other; at the same time, the resisting member 562 on each link member 552 rotates relative to the resisting member 563, so that the first cam 5620 of the resisting member 562 The second cam 5630 is rotationally pushed, the elastic member 565 elastically pushes between the washer 568 and the abutting member 563 so that the abutting member 563 slides along the axial direction of the rotating shaft 551, and the friction member 567 is clamped on the pad Between the sheet 568 and the second positioning member 566 , and the friction member 567 rotates relative to the washer 568 and the second positioning member 566 along with the corresponding rotating shaft 551 .

During the above process, the axial force on the first cam 5620, the second cam 5630 and the friction member 567 on each rotating shaft 551 is equal to the sum of the elastic force of the first elastic member 5651 and half of the elastic force of the second elastic member 5653; The friction torque between the first cam 5620 and the second cam 5630 and/or the friction resistance of the two friction members 567 can limit the two link members 552 to a specific angle between 180 degrees and 0 degrees. Specifically, during the bending process of the angle between the two link members 552 of the linkage mechanism 55 from 180 degrees to 90 degrees, the resisting member 562 pushes the resisting member 563 to slide, and the resisting member 563 pushes against the elastic member 565 The elastic deformation increases the compression amount of the elastic member 565 gradually, so that the elastic force of the elastic member 565 gradually increases, so that the friction resistance between the first cam 5620 and the second cam 5630 and the friction resistance of the friction member 567 gradually increase. Increase so that the two link members 552 can be limited at a specific angle between 180 degrees and 90 degrees; the angle between the two link members 552 of the linkage mechanism 55 is expanded from 90 degrees to 0 degrees Among them, the elastic member 565 elastically pushes against the holding member 563 to slide along the rotation axis 551, and the compression amount of the elastic member 565 gradually decreases, so that the elastic force of the elastic member 565 gradually decreases, so that the gap between the first cam 5620 and the second cam 5630 The frictional resistance between them and the frictional resistance of the friction member 567 are gradually reduced, but it can still ensure that the two link members 552 can be limited to a specific angle between 90 degrees and 0 degrees.

In other usage modes, the two connecting rods 552 can be rotated together in a direction away from each other, and each connecting rod 552 rotates along the axis of the corresponding rotating shaft 551 to drive the corresponding rotating shaft 551, the second A gear 5521 and a pushing member 562 rotate along the axis of the rotating shaft 551; the two first gears 5521 drive the two second gears 5542 of the gear combination 554 to rotate together, so that the two connecting rods of the linkage mechanism 55 The pieces 552 are away from each other and flattened; at the same time, the push piece 562 on each link piece 552 rotates relative to the hold piece 563, so that the first cam 5620 of the push piece 562 rotatably pushes against the second cam 5630, and pushes against the second cam 5630. The holding member 563 slides along the axial direction of the rotating shaft 551 to press the elastic member 565, and the elastic member 565 elastically pushes against the washer 568 so that the friction member 567 is clamped between the washer 568 and the second positioning member 566, and The friction member 567 rotates relative to the washer 568 and the second positioning member 566 along with the corresponding rotating shaft 551 .

In some embodiments, the second elastic member 5653 can be omitted. During the bending or unfolding process of the linkage mechanism 55, the axial direction of the first cam 5620, the second cam 5630 and the friction member 567 on each rotating shaft 551 The force is equal to the elastic force of the first elastic member 5651 .

Please refer to Fig. 7-Fig. 8 and Fig. 23-Fig. 24 together. Fig. 23 is a three-dimensional exploded schematic diagram of the rotation-assisting mechanism 57 and part of the bending mechanism 52 of the folding-assisting assembly 50 in Fig. 7; Fig. 24 is a schematic diagram of Fig. 23 The three-dimensional structure schematic diagram of another viewing angle of the rotation-assisting mechanism 57 and the bendable mechanism 52 in FIG. The rotating aid mechanism 57 includes a rotating member 571, the first end of which is rotatably connected to the middle hinge 521, and the opposite second end of the rotating member 571 is connected to the rotating hinge 523, and the rotating hinge 523 is opposite to Rotate on the middle hinge 521 to drive the rotating member 571 to rotate relative to the middle hinge 521 . Specifically, the rotation assisting mechanism 57 includes two rotating parts 571, each rotating part 571 includes a rotating part 5711 and a connecting part 5715 connected to the rotating part 5711, the rotating part 5711 is arranged on the first end of the rotating part 571, connected The portion 5715 is disposed on the second end of the rotating member 571 , the rotating portion 5711 is rotatably connected to the middle hinge 521 , and the connecting portion 5713 is connected to the rotating hinge 523 . The rotating part 5711 is in the shape of a circular arc sheet. The rotating part 5711 includes a circular arc-shaped first rotation-assisting surface 5712 and a second rotation-assisting surface 5713 away from the first rotation-assisting surface 5712. The second rotation-assisting surface 5713 is parallel to the first rotation-assisting surface 5713. The turning surface 5712 and the first turning-assisting surface 5712 are used to fit the first arc surface 5216 of the middle hinge 521 . When the first rotation-assisting surface 5712 is attached to the first arc surface 5216 , the axis of the first rotation-assisting surface 5712 and the first arc surface 5216 is collinear. The connecting portion 5715 is a sheet-like structure extending from one side of the rotating portion 5711 along the direction perpendicular to the axis of the first rotation-assisting surface 5712, and the connecting portion 5715 extends away from the side of the rotating portion 5711 for two There are two extension rods 5716, and the end of each extension rod 5716 is provided with a rotating cylinder 5717. The axis lines of the two rotating cylinders 5717 are collinear and parallel to the axis line of the first rotation-assisting surface 5712.

The rotation-assisting mechanism 57 also includes a mounting part 573, the connecting part 5711 is clamped between the mounting part 573 and the middle hinge 521, and the mounting part 573 is provided with a second arc surface 5730 matched with the second rotation-assisting surface 5713 . Specifically, the mounting part 573 includes a rectangular mounting block 5731, and the second arc surface 5730 is provided on the surface of the mounting block 5731 facing the rotating part 571. In this embodiment, the mounting block 5731 is provided with a Two second arc surfaces 5730, the two second arc surfaces 5730 are located on the opposite sides of the mounting block 5731; the surface of the mounting block 5731 facing the rotating member 571 protrudes from the opposite ends of the second arc surface 5730 There are positioning hooks 5733. The mounting block 5731 is provided with a plurality of connecting through holes 5735 , one of which is located between the two second arc surfaces 5730 , and the other connecting through holes 5735 are located around the two second arc surfaces 5730 . A connection hole 5736 is formed on the end surface of the mounting block 5731 facing the folding aid assembly 54 .

The folding aid assembly 54 also includes two connecting frames 58 , each connecting frame 58 is used for connecting the rotating member 571 and the link member 552 with the rotating hinge 523 . The connecting frame 58 includes a rectangular connecting plate 581, a first connecting portion 583 and a second connecting portion 585 arranged on the same surface of the connecting plate 581, and the first connecting portion 583 includes two protrusions protruding from the connecting plate 581 at intervals. 5831, guide grooves 5833 are provided on opposite sides of the two protruding strips 583. The second connecting part 583 includes three protrusions 5851 protruding from the connecting plate 581 and spaced apart from each other, and a receiving groove 5833 is formed between each two adjacent protrusions 5851; the end of each protrusion 5851 is provided with a shaft hole 5854 , the axes of these shaft holes 5854 are collinear. The end of the first connecting portion 583 protrudes from an arc-shaped sliding guide piece 586 , and the sliding guide piece 586 can cooperate with the second sliding guide groove 5237 of the rotating hinge 523 .

Please refer to Fig. 7-Fig. 14 and Fig. 23-Fig. 28 together, Fig. 25 is the three-dimensional sectional schematic view of folding device 50 in Fig. 3; Fig. 26 is the front view of folding device 50 in Fig. 25; Fig. 27 is a diagram Figure 28 is a front view of the folding device 50 in Figure 27. When assembling the folding aid assembly 54 to the bending mechanism 52, place the two rotating hinges 523 on opposite sides of the first hinge body 5210, place the two rotating hinges 523 and the first hinge body 5210 side by side, and place Each linkage mechanism 55 and limit mechanism 56 is placed on the corresponding positioning area 5212, specifically, the linkage mechanism 55 is placed on the first mounting part 5213, the two link members 552 correspond to the avoidance slots 52130 respectively, and the limit mechanism 56 is placed on the second mounting part of the positioning area 5212, the two first springs 5651 are respectively accommodated in the two receiving grooves 5214, and the connecting hole 5667 of the second positioning member 566 is facing the connecting hole 5215; The two rotating parts 571 are placed on the third mounting part of the corresponding positioning area 5212, so that the first rotating surface 5712 of the rotating part 571 is attached to the first arc surface 5216; each mounting part 573 is covered on the second On the positioning area 5212 corresponding to a joint body 5210, specifically, the mounting piece 573 is covered on the rotating piece 571 of the rotation assisting mechanism 57, and the connecting sections 5515 of the two rotating shafts 551 are respectively inserted into the two mounting pieces 573. In the connection hole 5736, the two second circular arc surfaces 5730 of the mounting part 573 are attached to the second rotation-assist surfaces 5713 of the two rotating parts 5711, and several connecting through holes 5735 of the mounting part 573 face several connecting holes 5215 respectively. And the positioning hook 5733 of the mounting part 573 is clamped on the opposite sides of the first hinge body 5210, and a plurality of locking pieces pass through the connecting hole 5667 and the connecting through hole 5735 to lock to the corresponding connecting hole 5215; the two connecting frames 58 are respectively connected to the two second connection regions 5232, specifically, the guide slide 586 of the connection frame 58 is slidably inserted into the second guide slide groove 5237 of the second connection part 5236, and the first connection part 5233 is accommodated in the connection frame 58 corresponding to the receiving groove 5833; the guide bar 5525 of each connecting rod 552 is slidably inserted into the corresponding receiving groove 5833 of the first connecting part 583; the two rotating cylinders of each rotating member 571 5717 is inserted into the two receiving grooves 5833 of the corresponding connection frame 58 until the shaft hole 5854 of the protrusion 5851, the inner cavity of the rotating cylinder 5717 and the first guide groove 5234 are facing each other, and the rotating shaft 587 is inserted into the shaft hole 5854, The inner cavity of the rotating cylinder 5717 and the first guide chute 5234, so that the rotating member 571 and the connecting rod member 552 are connected to the rotating hinge 523 through the connecting frame 58; The stop groove 5235 makes the two rotating hinges 523 and the fronts of the middle hinge 521 coplanar, preventing the rotating hinge 523 from being reversely bent relative to the middle hinge 521 . Then the cover body 5218 is connected to the back of the first joint body 5210 , so that the cover body 5218 covers the installation part 573 . The rotation axis between the rotating member 571 and the middle hinge 521 is parallel to the axis of the rotation shaft 551, and the rotation axis is closer to the front of the middle hinge 521 than the axis of the rotation shaft 551; The axis line of the first rotation-assisting surface 5712 or the second rotation-assisting surface 5713 of the member 571 is parallel to the axis line of the rotation shaft 551, and the axis line of the first rotation-assisting surface 5712 or the second rotation-assisting surface 5713 is relatively rotating. The axis of the shaft 551 is closer to the front of the middle hinge 521 .

Please refer to Figures 1-4 together, place the installed folding device 50 between the two frames 21, and fix the sides of the two rotating hinges 523 away from the middle hinge 521 to the two frames respectively twenty one. At this time, the fronts of the two frame bodies 21 , the fronts of the middle hinge 521 and the fronts of the rotating hinge 523 are in the same plane. The back of the flexible screen 30 is connected to the fronts of the two frames 21 and the front of the folding device 50 , the bendable area 31 is facing the folding device 50 , and the two non-bending areas 33 are facing the fronts of the two frames 21 respectively. When the flexible screen 30 is in the flattened state, the first cam 5620 and the second cam 5630 are attached to each other, and the elastic member 565 has a pre-elastic force and pushes against the holding member 563 to limit the bendable mechanism 52 to maintain the flattened state. The included angle between the connecting rods 5523 of the two connecting rods 552 is 0 degree. Since the front of the middle hinge 521 is a complete surface, and there is no step difference in the middle hinge 521, the flexible screen 30 will not be impacted by the step difference when it is flattened, and the flexible screen 30 will not have bad problems such as colored spots and bright spots, ensuring The reliability of the flexible screen 30 also improves the touch feel of the flexible screen 30 and improves user experience.

Please refer to FIG. 29 to FIG. 36 together. When bending the electronic device 100, a bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the rotating hinges connected to the two frames 21 523 are rotated in a direction adjacent to each other, and the folding device 50 is realized by the three folding assisting components 54 , and the bendable region 31 of the flexible screen 30 is bent with the bendable mechanism 52 . Specifically, if a bending force is applied to one of the frame bodies 21, the one of the frame bodies 21 will drive the corresponding rotating hinge 253 to rotate to the side close to the flexible screen 30 relative to the middle hinge 251; The guide bar 5525 of the rod 552 slides in the corresponding guide groove 5833 of the first connecting part 583, and the sleeve 5522, the rotating shaft 551, the first gear 5521 and the thrust member 562 of the connecting part 552 move along the rotating shaft 551. The axis line of the rotating first gear 5521 drives the other first gear 5521 to rotate through the gear combination 554, and the rotation of the other first gear 5521 drives the corresponding rotating shaft 551, the sleeve 5522, and the thrust member 562 and the connecting rod 5523 rotate, so that the two connecting rods 552 of the linkage mechanism 55 are synchronously close to each other; at the same time, the resisting member 562 on each connecting rod 552 rotates relative to the resisting member 563, so that the resisting member 562 The first cam 5620 rotates against the second cam 5630, the resisting member 563 slides along the axial direction of the rotating shaft 551 and presses the elastic member 565, and the elastic member 565 elastically pushes against the washer 568 so that the friction member 567 is clamped on the Between the washer 568 and the second positioning member 566 , the friction member 567 rotates relative to the washer 568 and the second positioning member 566 along with the corresponding rotating shaft 551 . During the bending process of the linkage mechanism 55, the rotating cylinder 5717 of the rotating member 571 rotates relative to the connecting frame 58 along the rotating shaft 587, and the first rotating surface 5712 and the second rotating surface 5713 of the rotating part 5711 are respectively relative to the corresponding first rotating surface. The first arcuate surface 5216 and the second arcuate surface 5730 rotate to realize the mutual closeness of the two rotating hinges 523, so that the folding device 50 is in a bent state, and the bendable region 31 of the flexible screen 30 is bent along with the folding device 50 , until the front surfaces of the two non-bending regions 33 of the flexible screen 30 are attached to each other, and the bendable region 31 is bent into a drop shape, thereby realizing seamless folding of the electronic device 100 .

In the above process, the sum of the friction torque between the first cam 5620 and the second cam 5630 and the friction resistance of the two friction members 567 is greater than the rebound force of the flexible screen 30, so that the rotation hinge 523 is relatively opposite to the middle hinge. The section 521 is positioned at a specific angle so that the two frames 21 can be limited to a specific angle between 0° and 180°. That is, if the rebound force of the flexible screen 30 is M0, within a certain angle range (50°-130°), ensure that the total friction torque M is greater than or equal to the sum of the rebound force and the hovering safety torque increment, that is, M≥M0+ ΔM, where ΔM is the hover safety torque increment. Specifically, during the bending process of the angle between the two link members 552 of the linkage mechanism 55 from 0° to 90°, the resisting member 562 pushes the resisting member 563 to slide, and the resisting member 563 presses the elastic member 565 The elastic deformation increases the compression amount of the elastic member 565 gradually, so that the elastic force of the elastic member 565 gradually increases, so that the friction resistance between the first cam 5620 and the second cam 5630 and the friction resistance of the friction member 567 gradually increase. increase, the bendable region 31 of the flexible screen 30 is gradually bent to form a rebound force, and the frictional resistance of the folding device 50 is greater than the rebound force of the flexible screen 30, so that the rotating hinge 523 is positioned at a position relative to the middle hinge 521 A specific angle, so that the two frames 21 can be limited at a specific angle between 0 degrees and 90 degrees. Figure 29 shows that the two frames 21 are bent and limited at 90 degrees, that is, the two sides of the flexible screen 30 The included angle between the two non-bending regions 33 is 90 degrees. During the bending process of the angle between the two frames 21 from 90 degrees to 180 degrees, the elastic member 565 elastically pushes the holding member 563 to slide along the rotation axis 551, and the compression amount of the elastic member 565 gradually decreases, so that the elastic The elastic force of the member 565 gradually decreases, so that the frictional resistance between the first cam 5620 and the second cam 5630 and the frictional resistance of the frictional member 567 gradually decrease, but the frictional resistance of the folding device 50 is still greater than the rebounding force of the flexible screen 30 , it can ensure that the two frames 21 can be limited to a specific angle between 90 degrees and 180 degrees. Figure 35 shows that the two frames 21 are bent to each other and are limited at 180 degrees, that is, the two non-bending areas 33 of the flexible screen 30 are parallel to each other; the bendable area 31 of the flexible screen 30 is bent to form a drop shape, The duty cycle of the bendable region 31 after bending is reduced, so that the overall thickness of the electronic device 100 can be reduced.

In some embodiments, the friction member 567 in the folding-assisting assembly 54 can be omitted, as long as the friction torque between the first cam 5620 and the second cam 5630 is greater than the rebound force of the flexible screen 30, so that the rotating hinge 523 Positioned at a specific angle relative to the middle hinge 521 .

In other bending methods for the electronic device 100, a bending force can also be applied to the two frame bodies 21 at the same time, and the two frame bodies 21 respectively drive the two rotating hinges 21 toward the side close to the flexible screen 30 Rotate and pass through the folding device 50 to realize the bending of the electronic device 100 .

When the electronic device 100 needs to be flattened, one of the frame bodies 21 is pulled outward, so that the two rotating hinges 21 connected to the two frame bodies 21 are rotated away from each other. Specifically, an outward pulling force is applied to one of the frame bodies 21 of the electronic device 100, and the one of the frame bodies 21 drives the corresponding rotating hinge 253 to rotate to the side away from the flexible screen 30 relative to the middle hinge 251. , so that the guide bar 5525 of each connecting rod 552 slides in the corresponding guide groove 5833 of the first connecting part 583, the sleeve 5522 of the connecting part 552, the rotating shaft 551, the first gear 5521 and the thrust member 562 along the The axis of the rotating shaft 551 rotates, and the rotating first gear 5521 drives the other first gear 5521 to rotate through the gear combination 554, and the rotation of the other first gear 5521 drives the corresponding rotating shaft 551, sleeve 5522, the push piece 562 and the connecting rod 5523 rotate, so that the two link pieces 552 of the linkage mechanism 55 are away from each other; at the same time, the push piece 562 on each link piece 552 rotates relative to the support piece 563, so that The first cam 5620 of the pushing member 562 rotatably pushes against the second cam 5630, and the elastic member 565 elastically resists between the washer 568 and the holding member 563 so that the holding member 563 slides in the axial direction of the rotating shaft 551, friction The piece 567 is clamped between the pad 568 and the second positioning piece 566, and the friction piece 567 rotates with the corresponding rotating shaft 551 relative to the pad 568 and the second positioning piece 566; During the process, the rotating cylinder 5717 of the rotating member 571 rotates relative to the connecting frame 58 along the rotating shaft 587, and the first rotating surface 5712 and the second rotating surface 5713 of the rotating part 5711 of the rotating member 571 are respectively relative to the corresponding first circle. The arc surface 5216 and the second arc surface 5730 rotate to realize the distance between the two rotating hinges 523, so that the folding device 50 unfolds, and the bendable area 31 of the flexible screen 30 unfolds with the folding device 50 until the flexible screen 30 unfolds. flat.

During the above process, the frictional resistance between the first cam 5620 and the second cam 5630 and the frictional torsion force of the two friction members 567 are greater than the rebound force of the flexible screen 30, so that the rotating hinge 523 relative to the middle hinge 521 Positioning at a specific angle enables the two frames 21 to be limited to a specific angle between 180 degrees and 0 degrees. Specifically, during the bending process of the angle between the two link members 552 of the linkage mechanism 55 from 180 degrees to 90 degrees, the resisting member 562 pushes the resisting member 563 to slide, and the resisting member 563 pushes against the elastic member 565 The elastic deformation increases the compression amount of the elastic member 565 gradually, so that the elastic force of the elastic member 565 gradually increases, so that the friction resistance between the first cam 5620 and the second cam 5630 and the friction resistance of the friction member 567 gradually increase. Increase, the friction resistance of the folding device 50 is greater than the rebound force of the flexible screen 30, so that the rotating hinge 523 is positioned at a specific angle relative to the middle hinge 521, so that the two frames 21 can be limited at 180 degrees to A specific angle between 90 degrees. During the bending process of the angle between the two frames 21 from 90 degrees to 0 degrees, the elastic member 565 elastically pushes the holding member 563 to slide along the rotation axis 551, and the compression amount of the elastic member 565 gradually decreases, so that the elastic The elastic force of the member 565 gradually decreases, so that the frictional resistance between the first cam 5620 and the second cam 5630 and the frictional resistance of the frictional member 567 gradually decrease, but the frictional resistance of the folding device 50 is still greater than the rebounding force of the flexible screen 30 , so that the rotating hinge 523 is positioned at a specific angle relative to the middle hinge 521 , which ensures that the two frames 21 can be limited to a specific angle between 90° and 0°.

In other bending methods of the electronic device 100, the two frame bodies 21 can also be simultaneously exerted outward pulling force, and the two frame bodies 21 respectively drive the two rotating hinges 21 to move away from the flexible screen 30. One side turns, and through the folding device 50 to realize the unfolding of the electronic device 100 .

The folding device 50 of the electronic device 100 of the present application realizes synchronous folding or unfolding through the three folding-assisting components 54. Since the elastic member 565 in the folding-assisting components 54 can provide a relatively large axial force, the first cam 5620 and all the There is a large friction torque between the second cam 5630, and the friction member 567 also has a relatively large friction resistance; therefore, the friction torque between the first cam 5620 and the second cam 5630 and the friction member 567 The total frictional torque of the folding device 50 formed by the sum of frictional resistances is large enough to realize the bending limit of the electronic device 100 at a specific angle between 0°-180°, and realize the hovering function of the whole device.

In some embodiments, the second spring 5653 of each folding aid assembly 54 can be omitted. At this time, the frictional torque between the first cam 5620 and the second cam 5630 is greater than the bendability of the flexible screen 30 The rebound force of the area, so that the rotating joint 523 is positioned at a specific angle relative to the middle joint 521.

In some embodiments, flexible screens of different specifications and layers can be adapted by modifying the number of first cams and second cams and the number of friction members of the folding aid assembly 54 .

The above is the implementation of the embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the embodiment of the present application, some improvements and modifications can also be made. These improvements and modifications are also It is regarded as the scope of protection of this application.

Claims

A folding device for supporting a flexible screen, characterized in that the folding device includes:

A bendable mechanism, the bendable mechanism includes a middle hinge and two rotating hinges connected to opposite sides of the middle hinge, the flexible screen is attached to the middle hinge and the rotating hinge section; and

A folding aid assembly, the folding aid assembly includes a linkage mechanism and a limit mechanism, the linkage mechanism is connected to the middle hinge and the two rotating hinges; the limit mechanism includes a A push piece, a hold piece and an elastic piece, the elastic piece provides the elastic force between the push piece and the push piece, and the rotating hinge is relatively The hinge rotates; the pushing member rotates relative to the resisting member, and the frictional resistance between the pushing member and the resisting member can make the rotating hinge be positioned at a position relative to the middle hinge specific angle.
The folding device according to claim 1, characterized in that, during the bending process of the folding device from 0° to 90°, the resisting member slides against the resisting member, and the resisting member squeezes Pressing the elastic member gradually increases the compression amount of the elastic member, and the elastic force of the elastic member gradually increases; during the bending process of the folding device from 90 degrees to 180 degrees, the elastic member elastically resists When the resisting member slides, the compression amount of the elastic member gradually decreases, and the elastic force of the elastic member gradually decreases.
The folding device according to claim 1, wherein the resisting member includes a first cam, the resisting member includes a second cam, and the first cam and the second cam are rotatably resisted by each other. .
The folding device according to claim 3, characterized in that, the friction torque between the first cam and the second cam is greater than the rebound force of the flexible screen, so that the rotation hinge relative to the The middle hinge is positioned at a specific angle.
The folding device according to claim 3, wherein the linkage mechanism comprises two rotating shafts, two connecting rods respectively connected to the two rotating shafts, and a The gear combination between each connecting rod is provided with the first gear meshing with the gear combination, and each connecting rod is connected to the pushing member, so that the two first cams are sleeved on the two said first cams respectively. The rotating shaft, the resisting member includes two second cams, the two second cams are slidably sleeved on the two rotating shafts, and the two connecting rods are connected to the two connecting rods respectively. The rotating hinge, the connecting rod rotates with the rotating hinge to drive the rotating shaft and the first cam to rotate relative to the second cam.
The folding device according to claim 5, wherein the first cam and the first gear share the same rotation axis, and the diameter of the pitch circle of the first gear is larger than the outer diameter of the first cam. path.
The folding device according to claim 5, wherein the linkage mechanism further includes a first positioning member, the limit mechanism further includes a second positioning member, and the first positioning member is connected to the two rotating One end of the shaft, the second positioning member is connected to the opposite end of the two rotating shafts, the connecting rod member, the resisting member, the resisting member and the elastic member are located on the first Between the positioning part and the second positioning part.
The folding device according to claim 7, wherein the resisting member further comprises a connecting portion and two second cams arranged at opposite ends of the connecting portion, and the elastic member is located on the second cam. Between the positioning member and the resisting member, the rotating shaft can rotate relative to the resisting member.
The folding device according to claim 7, wherein the limiting mechanism further includes a friction member fixedly sleeved on the rotating shaft, and the friction member is clamped between the second positioning member and the between the elastics.
The folding device according to claim 9, wherein the sum of the friction torque between the first cam and the second cam and the friction resistance of the two friction members is greater than the rebound force of the flexible screen , so that the pivot joint is positioned at a specific angle relative to the middle joint.
The folding device according to claim 9, wherein the limiting mechanism further comprises a gasket, the gasket is slidably sleeved on the two rotating shafts, and the gasket is located between the elastic member and the between the friction parts.
The folding device according to claim 11, wherein the elastic member includes a first spring sleeved on each of the rotating shafts, and the first cam, the first cam on each of the rotating shafts The axial force on the two cams and the friction member is equal to the elastic force of the first elastic member.
The folding device according to claim 12, wherein the elastic member further includes a second spring located between the washer and the resisting member, and the first spring on each of the rotating shafts The axial force on the cam, the second cam and the friction member is equal to the elastic force of the first elastic member plus half of the elastic force of the second spring.
The folding device according to claim 5, wherein the gear combination includes two second gears meshing with each other, and the first gears of the two connecting rods mesh with the two second gears respectively, The diameter of the pitch circle of the second gear is smaller than the diameter of the pitch circle of the first gear.
The folding device according to claim 3, wherein the first cam is provided with a first protrusion and a first depression along its circumference, and the second cam is provided with a second protrusion and a first depression along its circumference. Two recessed parts, the first protruding part cooperates with the second recessed part, and the second protruding part cooperates with the second recessed part.
The folding device according to claim 5, wherein the folding-assisting assembly further includes a rotation-assisting mechanism connected to the end of the linkage mechanism away from the limit mechanism, the rotation-assisting mechanism includes a rotating member, the The first end of the rotating member is rotatably connected to the middle hinge, the opposite second end of the rotating member is connected to the rotating hinge, and the rotating hinge rotates relative to the middle hinge to drive the rotation The member rotates relative to the middle hinge.
The folding device according to claim 16, wherein the rotation axis between the rotating member and the middle hinge is parallel to the axis of the rotation shaft, and the rotation axis is smaller than the rotation axis. The axis line is closer to the middle hinge.
The folding device according to claim 17, wherein the rotating member includes a rotating part, the rotating part is provided at the first end of the rotating member, and the rotating part includes a circular arc-shaped first rotation aid The middle hinge is provided with a first arcuate surface matched with the first rotation-assisting surface, and the first rotation-assisting surface is collinear with the axis of the first arcuate surface.
The folding device according to claim 18, wherein the rotating part further includes a second rotation-assisting surface away from the first rotation-assisting surface, and the second rotation-assisting surface is parallel to the rotation-assisting surface; The rotation aid mechanism also includes a mounting piece connected to the middle hinge, the connecting portion is clamped between the mounting piece and the middle hinge, and the mounting piece is provided with the second The second arc surface matched with the rotation-assisting surface.
An electronic device is characterized in that it includes a flexible screen, a casing and a folding device, the casing includes two frames, the folding device is arranged between the two frames, and the folding device includes a A bending mechanism and a folding aid assembly, the bending mechanism includes a middle hinge and two rotating hinges connected to the opposite sides of the middle hinge, the flexible screen is attached to the middle hinge and the The rotating hinge; the folding aid assembly includes a linkage mechanism and a limiting mechanism, and the linkage mechanism is connected to the middle hinge and the two rotating hinges; the limiting mechanism includes a The resisting piece, the resisting piece and the elastic piece, the elastic piece provides the elastic force between the said resisting piece and the said pushing piece, and the said rotating hinge is relative to the said linkage mechanism The middle hinge rotates; the pushing piece rotates relative to the resisting piece, and the frictional resistance between the pushing piece and the resisting piece enables the rotating hinge to be positioned relative to the middle hinge At a specific angle, the flexible screen is disposed on the casing and the folding device, and the flexible screen is bent or flattened with the folding device.