CN112534146A

CN112534146A - Linkage hinge, connecting device and bendable terminal

Info

Publication number: CN112534146A
Application number: CN201880093837.1A
Authority: CN
Inventors: 吴伟峰
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2018-05-25
Filing date: 2018-05-25
Publication date: 2021-03-19
Also published as: WO2019223012A1

Abstract

The embodiment of the invention discloses a linkage hinge (3), a connecting device (300) and a bendable terminal. The linkage hinge (3) comprises a plurality of linkage pieces (311,312,321,322,331,332), the linkage pieces (311,312,321,322,331,332) are arranged in at least two rows, each linkage piece (311,312,321,322,331,332) is provided with a plurality of transmission teeth, two adjacent linkage pieces (311,312,321,322,331,332) in the same row are meshed through the transmission teeth so that two adjacent linkage pieces (311,312,321,322,331,332) can be meshed and rotated, and two adjacent linkage pieces (311,312,321,322,331,332) in the same row are respectively and rotatably connected to the same linkage piece (311,312,321,322,331,332) in the other row through rotating shafts (361,362,363,364,365); the connecting device (300) comprises two structural parts (301 and 302) and the linkage hinge (3), wherein the linkage hinge (3) is connected between the two structural parts (301 and 302); the bendable terminal comprises the linkage hinge (3); linkage hinge (3), connecting device (300) and flexible terminal compare in current electron device's structure, and the form is more diversified, can satisfy more demands.

Description

Linkage hinge, connecting device and bendable terminal

Technical Field

The present invention relates to the field of electronic devices, and in particular, to a linkage hinge, a connection device, and a flexible terminal.

Background

Existing electronic devices, such as mobile phones, tablet computers, portable music players, portable video players, handheld game consoles, etc., have been widely used. However, the conventional electronic device has a single structural member, and cannot meet the requirements of people.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a linkage hinge, a connection device, and a bendable terminal, which have more diversified forms and can meet more requirements.

On one hand, the embodiment of the invention provides a linkage hinge, which comprises a plurality of linkage parts, wherein the linkage parts are arranged in at least two rows, each linkage part is provided with a plurality of transmission teeth, two adjacent linkage parts in the same row are meshed through the transmission teeth so as to enable the two adjacent linkage parts to be meshed and rotated, and the two adjacent linkage parts in the same row are respectively and rotatably connected to the same linkage part in the other row through a rotating shaft.

In another aspect, the invention provides a connection device comprising two structural members and the aforementioned linked hinge;

the linkage pieces in each row are the same in number, the linkage piece positioned at one end of the row and only rotationally connected with one linkage piece in the other adjacent row in each row is an active linkage piece, and the two active linkage pieces between the two adjacent rows are respectively and fixedly connected with the two structural parts; or,

the number of the linkage pieces contained in the two adjacent rows of the linkage pieces is different from 1, and the two linkage pieces positioned at two ends in the row with more number are respectively and fixedly connected with the two structural parts.

In still another aspect, the present invention provides a bendable terminal including the aforementioned linked hinge.

Compared with the structural member of the existing electronic device, the linkage hinge, the connecting device and the bendable terminal provided by the invention have more diversified forms and can meet more requirements.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

Fig. 1 is a front perspective view of a bendable terminal provided in accordance with a preferred embodiment of the present invention;

FIG. 2 is a rear perspective view of the bendable terminal of FIG. 1;

FIG. 3 is a perspective view of the bendable terminal of FIG. 1 in a bent state;

FIG. 4 is an exploded view of the flexible terminal of FIG. 1;

FIG. 5 is a rear exploded view of the flexible terminal of FIG. 2;

FIG. 6 is an exploded view of the bendable terminal of FIG. 3 in a bent state;

FIG. 7 is a schematic view of a linkage hinge of the bendable terminal of FIG. 4;

FIG. 8 is a schematic view of the linkage hinge of FIG. 7 at another angle;

FIG. 9 is an exploded view of the linked hinge of FIG. 7;

FIG. 10 is an exploded view of the linked hinge of FIG. 8;

FIG. 11 is a schematic view of the linkage hinge of FIG. 7 in a bent state;

FIG. 12 is a schematic view of the linkage hinge of FIG. 7 at another angle in a bent state;

FIG. 13 is a schematic view of the linkage hinge of FIG. 8 with the sheath attached;

FIG. 14 is an exploded view of the linked hinge of FIG. 13;

FIG. 15 is a schematic diagram of the drive assembly of the bendable terminal of FIG. 4;

FIG. 16 is a schematic view of the drive assembly of FIG. 15 at another angle;

FIG. 17 is a partially exploded schematic view of the drive assembly of FIG. 15;

FIG. 18 is a schematic structural view of the drive assembly of FIG. 15 in a flexed condition;

fig. 19 is a partial structural view of a bendable terminal according to another embodiment of the present invention;

FIG. 20 is an exploded view of the bendable terminal of FIG. 19;

FIG. 21 is a cross-sectional view of a bendable terminal provided in accordance with another embodiment of the present invention;

fig. 22 is a sectional view of the bendable terminal of fig. 21 in a bent state.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1, fig. 2 and fig. 3, the flexible terminal provided in the preferred embodiment of the present invention may be various foldable electronic devices such as a flexible mobile phone, a flexible tablet computer, a flexible PDA, a flexible display, and the like.

As shown in fig. 3 and 4, the bendable terminal includes a flexible display 100, a bendable mechanism, and a housing 400. The bendable mechanism comprises a support member 200 and a connecting device 300. The flexible display screen 100 is located at the front of the entire flexible terminal, and can be bent by itself and display content pictures, the support assembly 200 is used to provide support for the flexible display screen 100 and the entire flexible terminal, the connection device 300 is used to realize folding and unfolding of the flexible terminal, and the housing 400 is used for protecting the outer surface of the flexible terminal. In this embodiment, the flexible display 100 is located at an outer side surface of the bendable terminal in the folded state.

The flexible display screen 100 is connected to the supporting component 200, the supporting component 200 is used for supporting the flexible display screen 100, and the supporting component 200 can be combined with the flexible display screen 100 to form a flexible display module, so as to be applied to various devices requiring display images. The support assembly 200 includes a support plate 23 and a sliding plate 24 capable of sliding relative to the support plate 23, and opposite ends of the flexible display screen 100 are fixed to the support plate 23 and the sliding plate 24, respectively. As shown in fig. 4, the flexible display 100 includes a bendable portion 13 between both ends, and the support sheet 23 includes a bendable sheet 232 corresponding to the bendable portion 13. The support piece 23 and the slide piece 24 are respectively located at both ends of the bendable terminal, and the bendable portion 13 and the bendable piece 232 are located at an intermediate position of the bendable terminal and can be bent in accordance with the bending of the bendable terminal. The flexible display 100 further includes a first flat portion 11 and a second flat portion 12, the first flat portion 11 and the second flat portion 12 respectively form opposite ends of the flexible display 100, and the bendable portion 13 is integrally formed between the first flat portion 11 and the second flat portion 12.

The support assembly 2 further comprises a first support 21 and a second support 22; the support plate 23 includes a fixing plate 231 connected to a bendable plate 232, the fixing plate 231 is fixed to the first support 21, and the sliding plate 24 is slidably connected to the second support 22. By the first support member 21 and the second support member 22, the support plate 23 and the sliding plate 24 can be conveniently assembled and connected, and the relative sliding between the support plate 23 and the sliding plate 24 can be facilitated. The first supporting member 21 and the second supporting member 22 respectively correspond to two ends of the flexible display screen 100 to respectively support the two ends of the flexible display screen 100.

The connecting device 300 includes a driving assembly, a linkage hinge 3 and a structural member connected to the linkage hinge. The connection device 300 can be bent, and when the connection device 300 is bent, the driving assembly converts the bending angle of the connection device 300 into a displacement to drive the first support 21 and the second support 22 to slide relative to the connection device 300. More specifically, the driving assembly can convert the rotation angle of the linkage hinge 3 relative to the structural member into displacement to drive the first support 21 and the second support 22 to slide relative to the connecting device 300.

The number of the structural members is two, and the two structural members are connected in a bendable manner through the linkage hinge 3. The two structural members are respectively in sliding fit with the two supporting members, and the sliding directions of the two structural members are the arrangement directions of the two structural members in the unfolding state. In this embodiment, for convenience of description, the two structural members are a first structural member 301 and a second structural member 302. The first structural member 301 is slidably connected to the first support 21, the second structural member 302 is slidably connected to the second support 22, and both the sliding directions of the first support 21 and the second support 22 are the arrangement directions of the first structural member 301 and the second structural member 302 in the unfolded state, that is, the direction from the first structural member 301 to the second structural member 302, or the direction from the second structural member 302 to the first structural member 301.

The housing 400 includes two sub-housings, which are respectively fixedly connected with the two supporting members. Each shell sub-shell comprises a middle frame and a back shell which are fixedly connected, and the middle frame and the support piece are integrally formed or the middle frame and the back shell are integrally formed and are fixedly connected with the support piece. For convenience of description, the two sub-housings are a first sub-housing 410 and a second sub-housing 420, respectively, the first sub-housing 410 includes a first middle frame 411 and a first back housing 412 fixedly connected, and the first middle frame 411 and the first support 21 may be integrally formed. The second sub-shell 420 includes a second middle frame 421 and a second back shell 422, which are fixedly connected, and the second middle frame 421 and the second support 22 may be integrally formed.

As shown in fig. 4 and 6, the bendable terminal according to the present invention can be folded and unfolded in the left and right direction of fig. 4. The first flat portion 11, the fixing piece 231, the first supporting member 21, the first structural member 301, and the first back shell 412 are sequentially stacked from top to bottom, and are located in a right half of the bendable terminal in the drawing. The second straight portion 12, the sliding plate 24, the second supporting member 22, the second structural member 302 and the second back shell 422 are sequentially stacked from top to bottom, and are located at the left half portion of the bendable terminal in the drawing. The bendable portion 13, the bendable piece 232, and the interlocking hinge 3 are stacked in this order from top to bottom, and are located at the middle portion of the bendable terminal.

In the flexible display module, the supporting plate 23 and the sliding plate 24 can be directly attached to the flexible display 100 to support the flexible display 100. When the flexible display module is bent, because the flexible display screen 100 and the support assembly 200 are stacked and arranged, and the bending radii of the flexible display screen 100 and the support assembly 200 are different, the flexible display screen 100 can be prevented or reduced from being damaged due to pulling or extruding in the bending and unfolding processes by utilizing the relative sliding between the support sheet 23 and the sliding plate 24.

The fixing piece 231 and the bendable piece 232 of the support piece 23 are integrally formed to facilitate processing and preparation, the fixing piece 231 is stacked and fixedly connected to one end of the flexible display screen 100, i.e., the first flat portion 11, the fixing piece 231 is stacked and fixedly connected to the first support 21, and the fixing piece 231 is located between one end of the flexible display screen 100 and the first support 21. The bendable piece 232 is disposed opposite to the bendable portion 13, and an end of the bendable piece 232 away from the fixing piece 231 is fixedly connected to the second support member 22.

The support sheet 23 is made of a bendable material and has a restoring force to a flat state. Preferably, the support plate 23 is a steel plate, but in other embodiments, the support plate 23 may be made of other metal or alloy materials.

The flexible portion 13 of the flexible display screen 100 is in sliding contact with the flexible sheet 232 of the support sheet 23, so that damage to the bendable portion 13 of the flexible display screen 100 due to pulling or extrusion caused by different bending radii of the two in the bending and unfolding processes can be avoided or reduced, and the service life of the flexible display screen 100 is ensured.

Since the bendable portion 13 is located outside the bendable piece 232 during the folding and unfolding processes of the bendable terminal, and the bending radii of the bendable portion 13 and the bendable piece 232 are not the same, if the bendable portion 13 and the bendable piece 232 are fixedly connected, the bendable portion 13 will be elongated after being bent so that the length of the bendable portion 13 is greater than that of the bendable piece 232, which will cause a pull on the bendable portion 13 to break the flexible display screen 100, and thus the bendable portion 13 and the bendable piece 232 need to be able to move relatively. Because the first flat portion 11 is fixedly connected to the fixing plate 231, the bendable portion 13 can drive the second flat portion 12 to move relative to the connection portion between the bendable sheet 232 and the second supporting member 22, that is, the second flat portion 12 can slide relative to the second supporting member 22, so as to prevent or reduce the pulling of the flexible display 100.

One end of the bendable piece 232, which is far away from the fixing piece 231, is fixed on the second supporting member 22, so that the bendable piece 232 and the second supporting member 22 can be directly and fixedly connected, thereby facilitating assembly and connection, and the supporting assembly 2 is an integral module, thereby facilitating maintenance and assembly. Here, in other embodiments, both the end of the bendable tab 232 remote from the fixing tab 231 and the second support 22 may be fixed to other structural components within the bendable terminal, or both may be a slip fit.

The distance between the end of the bendable piece 232 remote from the fixing piece 231 and the slide plate 24 is variable. The position between the end of the bendable piece 232 far from the fixing piece 231 and the sliding plate 24 can be changed relatively, rather than being fixedly arranged, so that the damage to the flexible display screen 100 can be avoided or reduced by the sliding between the bendable piece 232 and the sliding plate 24.

As shown in fig. 4, the sliding plate 24 is fixedly connected to the other end of the flexible display screen 100, i.e. the second straight portion 12, and the sliding plate 24 can be used to support the second straight portion 12, so as to improve the structural strength of the second straight portion 12. And the sliding plate 24 is slidably connected to the second support 22 to ensure the stability of the sliding of the second straight portion 12 relative to the second support 22.

As shown in fig. 4 and 5, the sliding plate 24 is fixed with a guide protrusion 241, the second support 22 is provided with a guide hole 221, the guide protrusion 241 is slidably disposed in the guide hole 221, and the stability of the relative movement between the sliding plate 24 and the second support 22 can be ensured by the cooperation between the guide protrusion 241 and the guide hole 221. The plurality of guide protrusions 241 and the plurality of guide holes 221 may be divided into two groups, and the two groups are respectively disposed on two sides of the sliding plate 24, so as to further ensure the stability of the relative movement between the sliding plate 24 and the second support 22. The guide protrusions 241 extend downward from the lower surface or side surface of the sliding plate 24, and the guide holes 221 penetrate the upper and lower surfaces of the second support 22.

The second support member 22 is plate-shaped and is disposed in close contact with the sliding plate 24, which further facilitates the stability of the relative movement therebetween. The guide protrusion 241 is bent to form a hook, and the edge of the guide hole 221 is located between the hook and the sliding plate 24, so that the sliding plate 24 and the second support 22 can be conveniently assembled and connected into a whole.

As shown in fig. 5, the flexible display module further includes an elastic member 25 connected to the sliding plate 24, the elastic member 25 is used for providing an elastic force to move the sliding plate 24 away from the first supporting member 21, and during the unfolding process of the flexible terminal, the elastic member 25 can enable the sliding plate 24 to drive the second flat portion 12 to move, so as to flatten the flexible display screen 100 and prevent the flexible display screen 100 from forming wrinkles. Preferably, the elastic member 25 is a compression spring, but in other embodiments, the elastic member 25 may also be a spring plate, a torsion spring, or other members capable of providing an elastic force.

In this embodiment, the elastic member 25 is connected between the sliding plate 24 and the second support member 22 to facilitate the assembly connection of the elastic member 25. Here, in other embodiments, the elastic member 25 may also be connected between the sliding plate 24 and other structural members inside the bendable terminal as long as the elastic member 25 is enabled to generate an elastic force toward the sliding plate 24 in a direction away from the first support 21.

Further, as shown in fig. 4 and 5, the sliding plate 24 is provided with a protrusion 242, the second support member 22 is provided with a through hole 222, and the protrusion 242 slidably passes through the through hole 222 and protrudes from the second support member 22. The bump 242 can slide within the through hole 222 in a direction of the first support 21 toward the second support 22. The positioning block 223 is disposed on a surface of the second supporting member 22 away from the sliding plate 24, and the elastic member 25 is disposed between the protrusion 242 and the positioning block 223.

As shown in fig. 4, one end of the bendable sheet 232 away from the fixing sheet 231 is bent toward the second supporting member 22 to form a connecting portion 233, the supporting member 2 further includes a pressing block 26 attached to the connecting portion 233, and the connecting portion 233 can be pressed against the second supporting member 22 by the pressing block 26, so as to facilitate the fixed connection between the bendable sheet 232 and the second supporting member 22. More specifically, the connecting portion 233 is bent downward relative to the bendable sheet 232 and then horizontally extends toward the slide plate 24 to facilitate the fitting connection with the pressing block 26.

Further, the pressing block 26 is provided with a pressing hole 260; the second supporting member 22 fixedly connected with the bendable piece 232 is formed with a protrusion 226, the connecting portion 233 is provided with a fixing hole 230, the protrusion 226 penetrates through the fixing hole 230 and the pressing hole 260, and the connecting portion 233 is fixed between the second supporting member 22 and the pressing block 26. The pressing block 26 can be used to realize a fixed connection between the second support 22 and the support sheet 23, and is convenient to assemble.

The plurality of protrusions 226 and the plurality of corresponding fixing holes 230 and pressing holes 260 may ensure the connection strength between the second support 22 and the support plate 23 by the cooperation of the plurality of protrusions 226 and the plurality of fixing holes 230 and the plurality of pressing holes 260. The pressing piece 26 may be an elongated shape disposed along the edge of the end portion of the bendable piece 232, that is, the pressing piece is disposed along the width direction of the bendable terminal, and the plurality of pressing holes 260 are disposed along the length direction of the pressing piece 26.

When the flexible display screen 100 is in the unfolded state, the surface of the pressing block 26 facing the flexible display screen 100 is flush with the surface of the fixing piece 231 facing the flexible display screen 100, so that the pressing block 26 and the fixing piece 231 can support the flexible display screen 100 flatly.

The second supporting member 22 is provided with a groove 220, the protrusion 226 is disposed in the groove 220, and the connecting portion 233 of the bendable piece 232 is bent and extends into the groove 220. The pressing block 26 and the connecting portion 233 are both located in the groove 220, the connecting portion 233 is fixed between the pressing block 26 and the second support 22, the protrusion 226 penetrates through the fixing hole 230 and the pressing hole 260, and the pressing block 26 can be used to realize the fixed connection between the second support 22 and the support sheet 23. The groove 220 can accommodate the connecting portion 233 and the pressing block 26. In the unfolded state of the bendable terminal, the sliding plate 24, the pressing piece 26 and the fixing piece 231 are all flush with the surface of the flexible display 100 to smoothly support the flexible display 100. In this embodiment, the length and width of the groove 220 are larger, and the sliding plate 24 is also located in the groove 220, so that the sliding plate 24 is flush with the surface of the pressing block 26 facing the flexible display screen 100, which facilitates assembly and connection, and also facilitates reducing the thickness of the whole terminal.

The fixing piece 231 is fixedly connected to the first support 21, and the first support 21 is slidably connected to the first structural member 301. When the first supporting member 21 slides relative to the first structure 301, the first supporting member 21 can drive the fixing piece 231, the first straight portion 11, and the first housing 410 to move.

When the bendable terminal is folded from the unfolded state, the first structural member 301 and the second structural member 302 are rotated close to each other by the interlocking hinge 3 to realize folding, the flexible display screen 100 is bent, the second straight portion 12 pulls the sliding plate 24 to slide toward the bent position relative to the second support 22, and the sliding plate 24 is moved toward the support plate 23 to offset the increase in length of the flexible display screen 100 due to folding. The elastic member 25 is compressed to generate a resilient force.

On the contrary, when the bendable terminal is unfolded from the folded state, the first structural member 301 and the second structural member 302 are rotated away from each other by the interlocking hinge 3 to realize the unfolding. The resilience of the elastic member 25 drives the sliding plate 24 and the second flat portion 12 to slide relative to the second supporting member 22 in a direction away from the bending position, so that the flexible display screen 100 is flattened. By means of the relative movement of the sliding plate 24 and the second support member 22, it is ensured that the flexible display screen 100 is not stretched or squeezed during the bending or flattening process.

As shown in fig. 5, the connecting devices 300 are provided in two sets, and the arrangement direction of the two sets of connecting devices 300 is perpendicular to the arrangement direction of the first structural member 301 and the second structural member 302, and is respectively disposed at both side ends in the width direction of the bendable terminal. It will be appreciated that the bendable terminal is rectangular in the expanded state and may be folded lengthwise to reduce its length dimension. The first and

second supports

21 and 22 are arranged along the length direction of the bendable terminal, and the first and second

flat portions

11 and 12 are also arranged along the length direction of the bendable terminal.

As shown in fig. 4, two sets of the connecting devices 300 are connected by two fixing members, and the two fixing members are respectively and fixedly connected with two structural members of the same set; two opposite structural members of the two sets of connecting devices 300 are fixedly connected by a fixing member, so as to realize the simultaneous actions of the two structural members. The two supporting pieces are respectively in sliding fit with the two fixing pieces. The two first structural members 301 are fixedly connected by a first fixing member 305 to realize simultaneous operation of the two first structural members 301. The two second structure members 302 are fixedly connected by a second fixing member 304 to realize the simultaneous movement of the two second structure members 302. By using the two sets of connection devices 300, the stability of the bending and expanding processes of the bendable terminal can be realized, and a flexible circuit board and other devices can be arranged between the two connection devices 300. Here, in other embodiments, the number of the connection means 300 may be one, and the one is located at an intermediate position in the width direction of the bendable terminal.

The two supporting pieces are respectively matched with the two fixing pieces in a sliding mode so as to realize relative sliding between the supporting pieces and the structural piece. In this embodiment, the sliding fit structure between each supporting member and each fixing member is the same, and the sliding fit structure between the first supporting member and the first fixing member is described in detail herein.

As shown in fig. 4, a plurality of strip-shaped bosses 3031 are arranged on the first fixing member 305, the plurality of strip-shaped bosses 3031 are arranged in a row along the arrangement direction of the two groups of connecting devices 300, and the length direction of the strip-shaped bosses 3031 is the arrangement direction of the two structural members; the first supporting member 21 is provided with a plurality of strip-shaped grooves 2101 matched with the strip-shaped bosses 3031, each strip-shaped boss 3031 is slidably arranged in each strip-shaped groove 2101, and the sliding stability of the first supporting member 21 relative to the first fixing member 305 can be ensured through the matching of the plurality of strip-shaped bosses 3031 and the plurality of strip-shaped grooves 2101.

The linkage hinge 3 comprises a plurality of linkage parts, the linkage parts are arranged into at least two rows in the unfolding state of the linkage hinge 3, each linkage part is provided with a plurality of transmission teeth, the two adjacent linkage parts positioned in the same row are meshed with each other through the transmission teeth, so that the two adjacent linkage parts can be meshed and rotated, and the two adjacent linkage parts positioned in the same row are respectively rotatably connected to the same linkage part in the other row through the rotating shafts which are close to each other.

Setting the first linkage piece of the first row to be static and used as a reference object, and setting the first linkage piece and the second linkage piece of the adjacent second row to be mutually meshed and rotatably connected with the first linkage piece of the first row, when the first linkage piece of the second row rotates, the second linkage piece of the second row is driven to rotate, the second linkage piece of the second row drives the second linkage piece of the first row to rotate relative to the first linkage piece of the first row in a meshing way, the second linkage piece of the first row drives the third linkage piece of the second row to rotate relative to the second linkage piece of the second row in a meshing way, and so on, the rotation of a linkage part can drive a plurality of linkage parts to be linked, the rotation of any linkage part in the linkage hinge can drive all other linkage parts to rotate, and each linkage part can synchronously rotate when the linkage hinge is bent. Because two adjacent linkage pieces in the same row are meshed, the transmission tooth structures of the two linkage pieces are the same, the angular speeds of the two linkage pieces are kept the same, the transmission ratio is 1, the rotating angles between each linkage piece and the adjacent linkage piece are consistent, and meanwhile, the relative rotating angles between every two adjacent linkage pieces in different rows are the same.

In this embodiment, a plurality of linkage spare is arranged into two rows to simplify the structure, reduce occupation space. Here, in other embodiments, the plurality of links may be arranged in three or more rows. The linkage members of each row are staggered from adjacent linkage members of another row so that the linkage members can be simultaneously rotationally connected with two meshed linkage members of another adjacent row.

Referring to fig. 7 to 12, the number of the linkage members included in each row of linkage members is the same, and is more than three; of the links in each row, the link at one end of the row and rotatably connected to only one link in the other adjacent row is an active link 311/312, and the two active links 311/312 in the two adjacent rows are fixedly connected to the two structural members 301/302, respectively. Here, in other embodiments, as the number of the link members included in two adjacent rows differs by 1, two link members located at two ends of a row with a larger number are respectively fixedly connected to the two structural members 301/302.

Of the rows of linkages, the linkage at the other end opposite the active linkage 311/312 is a driven linkage 321/322, the number of linkages in each row is at least three, one each for the active linkage 311/312 and the driven linkage 321/322, the linkage between the active linkage 311/312 and the driven linkage 321/322 is a middle linkage 331/332, the middle linkage 331/332 is at least one, and the middle linkage 331/332 is a linkage that engages the active linkage 311/312 and the driven linkage 321/322. It will be appreciated that the master link 311/312, the middle link 331/332, and the slave link 321/322 are differently named for the links at different positions in each row, and that the differences in position and structure between the three form three embodiments of links. In other alternative embodiments, the driving link 311/312 can also be a driven link or a middle link, the driven link 321/322 can also be a driving link or a middle link, and the middle link 331/332 can also be a driving link or a driven link. By other nomenclature, the master link 311/312 may serve as the first link of the linkage hinge, the middle link 331/332 may serve as the second link of the linkage hinge, and the slave link 321/322 may serve as the third link of the linkage hinge. The first linkage member and the second linkage member in the same row are adjacent and rotationally connected through meshing.

In this embodiment, the middle linkage 331/332 in each row is one, i.e., each row contains three linkages, for a total of six linkages. The middle linkage 331/332 is located between the driving linkage 311/312 and the driven linkage 321/322, and both ends of the middle linkage 331/332 are engaged with the driving linkage 311/312 and the driven linkage 321/322 respectively. Here, in other embodiments, the middle link members 331/332 in each row may be two or more and arranged in a row, in which case, adjacent two middle link members 331/332 are engaged with each other, the middle link member 331/332 adjacent to the driving link 311/312 is engaged with the driving link 311/312, and the middle link member 331/332 adjacent to the driven link 321/322 is engaged with the driven link 321/322.

Because two adjacent linkage pieces that are located in the same row need rotate simultaneously and connect in a linkage piece of adjacent another row, and the linkage piece number of two adjacent rows is the same, make the linkage piece of two adjacent rows be the dislocation arrangement, a linkage piece can be located the position between two linkage pieces of another row promptly, thereby make each row all have a linkage piece that is located tip department only can with a linkage piece normal running fit of adjacent another row, the linkage piece of other positions department all can simultaneously with two linkage piece normal running fit of another row, this linkage piece that is located tip department is initiative linkage piece 311/312 promptly. Due to the staggered arrangement of the linkage pieces in the two adjacent rows, the two active linkage pieces 311/312 are respectively located at the two ends of the whole linkage hinge 3. It can thus be determined that the three of the master link 311/312, the middle link 331/332, and the slave link 321/322 are arranged in opposite order in adjacent rows. As shown in fig. 9, in the direction from the first structural member 301 to the second structural member 302, the arrangement order in the first row is: the driving link 311, the middle link 331 and the driven link 321/322 are arranged in the following order in the adjacent second row: a driven linkage 322, a middle linkage 332, and a driving linkage 312.

In the first row, the driving linkage part 311 and the middle linkage part 331 are respectively rotatably connected to the driven linkage part 322 of the second row around the rotation axes when the driving linkage part 311 and the middle linkage part 331 are respectively rotatably connected to the middle linkage part 332 of the second row around the rotation axes when the driving linkage part 331 and the middle linkage part 321 are respectively rotatably connected to the rotation axes when the driving linkage part and the middle linkage part are rotatably engaged. In the second row, the driving linkage member 312 and the middle linkage member 332 are respectively rotatably connected to the driven linkage member 321 in the first row around the rotation axes thereof when they are engaged to rotate, and the middle linkage member 332 and the driven linkage member 322 are respectively rotatably connected to the middle linkage member 331 in the first row around the rotation axes thereof when they are engaged to rotate.

Each linkage piece is provided with a shaft hole, a rotating shaft is arranged in each shaft hole, and the rotating shaft is rotatably arranged in each shaft hole. The two adjacent rows of linkage parts are rotationally connected through the rotating shaft, and the rotation fit between the two adjacent rows of linkage parts can be facilitated by the matching of the rotating shaft and the shaft hole. Because two rows of linkage pieces all contain a plurality of linkage pieces, can confirm that the pivot is corresponding for a plurality ofly, and can confirm the number of pivot according to the number of linkage pieces. The axial directions of the rotating shafts are mutually parallel, the rotating shafts are arranged into a row along the row direction of the linkage piece, and the two adjacent rotating shafts are arranged at equal intervals. The plurality of rotating shafts are arranged at equal intervals, so that a plurality of rotating shaft centers formed among the linkage parts are arranged at equal intervals. In this embodiment, the number of the linkage members in each row is three, and the number of the rotation shafts is five.

The number of the rotating shafts between two adjacent rows of the linkage parts is five, and the linkage parts between two adjacent rows can rotate relatively through the rotating shafts. The five rotating shafts are arranged in a row along the arrangement direction of the link member, and are a first rotating shaft 361, a second rotating shaft 362, a third rotating shaft 363, a fourth rotating shaft 364 and a fifth rotating shaft 365 in sequence. The third rotating shaft 363 penetrates through the middle of the linkage hinge, and the other rotating shafts are respectively located at two sides of the third rotating shaft 363, so that the third rotating shaft 363 is located at or close to the middle of the linkage hinge.

The driving link 311 and the middle link 331 engaged with each other in one row are respectively rotatably connected to the driven link 322 of the other adjacent row by a first rotating shaft 361 and a second rotating shaft 362.

Specifically, the driving link 311 in the first row is provided with a shaft hole, and the rotating shaft in the shaft hole is the first rotating shaft 361. The driving link 311 in the first row and the driven link 322 in the second row are rotatably connected through a first rotating shaft 361, where the driving link 311 in the first row and the driven link 322 in the second row can rotate relatively, and the first rotating shaft 361 can rotate relatively to both the driving link 311 in the first row and the driven link 322 in the second row, or the first rotating shaft 361 is fixedly connected to the driving link 311 in the first row and the first rotating shaft 361 is rotatably connected to the driven link 322 in the second row, or the first rotating shaft 361 is rotatably connected to the driving link 311 in the first row and the first rotating shaft 361 is fixedly connected to the driven link 322 in the second row, and so on. The first shaft 361 may also be rotatably connected to the structure 301.

In the first row, the driving link 311 is engaged with the middle link 331, when the driving link 311 and the middle link 331 rotate respectively through an engaging manner, the driving link 311 can rotate around the central axis of the first rotating shaft 361, and the central axis of the first rotating shaft 361 forms a rotation axis on the driving link 311 when the driving link 311 and the middle link 331 are engaged to rotate. The central axis of the first rotating shaft 361 is also the shaft center between the driving link 311 and the driven link 322 of the second row.

Be connected with two commentaries on classics holes on the middle part linkage 331 of first row, be provided with the pivot in two commentaries on classics holes respectively: a second rotation shaft 362 and a third rotation shaft 363. The second rotating shaft 362 is close to the driving link 311 relative to the third rotating shaft 363. The middle link 331 of the first row is rotatably connected to the driven link 322 of the second row by a second rotating shaft 362 so that they can rotate relatively. The middle link 331 of the first row is rotatably connected to the middle link 332 of the second row by a third rotation shaft 363 so that they can rotate relatively. When the driving link 311 and the middle link 331 in the first row rotate respectively in an engaging manner, the middle link 331 rotates around the central axis of the second rotating shaft 362, and the central axis of the second rotating shaft 362 forms a rotating axis on the middle link 331 when the driving link 311 and the middle link 331 rotate in an engaging manner. The central axis of the second rotating shaft 362 is also the rotating axis of the relative rotation between the middle link 331 and the second row of the driven links 322.

Be provided with two shaft holes on the driven linkage piece 321 of first row, be provided with the pivot in two shaft holes respectively: a fourth rotary shaft 364 and a fifth rotary shaft 365. The fourth rotating shaft 364 is close to the middle rotating shaft with respect to the fifth rotating shaft 365. The driven link member 321 of the first row is rotatably connected to the middle link member 332 of the second row by a fourth rotating shaft 364, and the driven link member 321 of the first row is rotatably connected to the driving link member 312 of the second row by a fifth rotating shaft 365.

The middle link 331 is engaged with the driven link 321, and when the middle link 331 and the driven link 321 rotate respectively in an engaged manner, the middle link 331 rotates around the central axis of the third rotation shaft 363, and the driven link 321 rotates around the central axis of the fourth rotation shaft 364. The central axis of the third shaft 363 forms a rotation axis of the middle link 331 when the driven link 321 is engaged with the middle link 331 for rotation. The central axis of the fourth shaft 364 forms the rotation axis of the driven link 321 when the driven link 321 is engaged with the middle link 331 for rotation.

The central axis of the third rotating shaft 363 is also a rotational axis center of the middle link members 331,332 in two adjacent rows, and the central axis of the fourth rotating shaft 364 is also a rotational axis center of the driven link member 321 in the first row and the middle link member 332 in the second row.

The matching relationship between the driven link member 321 in the first row and the driving link member 312 in the second row is the same as the matching relationship between the driving link member 311 in the first row and the driven link member 322 in the second row, and the details are not repeated here.

The driven linkage piece 321 of the first row is set to be static and used as a reference object, the driving linkage piece 312 and the middle linkage piece 332 of the adjacent second row are mutually meshed and are rotationally connected to the driven linkage piece 321 of the first row, when the driving linkage piece 312 of the second row rotates, the middle linkage piece 332 of the second row is driven to rotate, the middle linkage piece 332 of the second row drives the middle linkage piece 331 of the first row to rotate relative to the driven linkage piece 321 of the first row through meshing, the middle linkage piece 331 of the first row drives the driven linkage piece 322 of the second row to rotate relative to the middle linkage piece 332 of the second row through meshing, and so on, the rotation of the driving linkage piece 312 of the second row can drive a plurality of linkage pieces to carry out linkage.

The shape and the size of the transmission teeth on each linkage piece are the same, so that the transmission ratio between two adjacent linkage pieces is 1, and the angular speeds of the two linkage pieces are kept consistent in the rotating process.

The driven link 321 in the first row is set to be stationary and used as a reference object, if the driving link 312 in the second row rotates 15 degrees counterclockwise, the middle link 332 in the second row rotates 15 degrees clockwise, the driven link 321 in the first row remains stationary, and the plane where the two rotation axes of the driven links 321 are located is a horizontal plane, the middle link 331 in the first row engages with the driven link 321 in the first row and rotates 30 degrees clockwise with respect to the horizontal plane, the driving link 322 in the second row engages with the middle link 332 in the second row and rotates 45 degrees clockwise with respect to the horizontal plane, the driving link 311 in the first row engages with the middle link 331 in the first row and rotates 60 degrees clockwise with respect to the horizontal plane, and the angle of relative rotation between the driving link 311 in the first row and the driving link 312 in the second row is 75 degrees. The first structural member 301 and the second structural member 302 are respectively and fixedly connected with the two rows of active linking

pieces

311 and 312, so that the relative rotation angle between the two first structural members 301 and the second structural member 302 is 75 degrees, and the relative folding angle between the two ends of the whole bendable terminal is 75 degrees.

The second row of driving links 312 rotates in the opposite direction to the other 4 links (first row of

middle links

331 and 311, second row of middle links 332 and 322), so that in practice each link rotates the same 30 degrees relative to the adjacent links in the same row. That is, as long as one of the linkage members is rotated, the other linkage members will rotate by the same angle relative to the adjacent linkage members in the same row, that is, all the linkage members rotate synchronously.

Each linkage has cylinder portion, and a plurality of driving teeth of each linkage can set up on the arc cylinder of cylinder portion, and the shaft hole sets up the central axis department at cylinder portion, wears to be equipped with the pivot in the shaft hole to make a plurality of driving teeth can follow the central axial of pivot and arrange into the arc. Through setting up cylinder portion, can conveniently set up pivot and driving tooth on the linkage to be convenient for processing preparation and assembly connection.

Specifically, the driving linkage 311/312 only needs to engage with the middle linkage 331/332 and only one set of transmission teeth is needed on the driving linkage 311/312 because only one set of transmission teeth is needed on the first rotating shaft 361 or the fifth rotating shaft 365, and thus the driving linkage 311/312 only has one cylindrical portion. Both ends of the middle link 331/332 are engaged, so that the middle link 331/332 is provided with two sets of gear teeth, which are disposed at both ends of the middle link 331/332. Two rotating shafts are arranged on the middle linkage piece 331/332, so that two cylindrical portions are arranged on the middle linkage piece 331/332, the two cylindrical portions are respectively arranged at two ends of the middle linkage piece 331/332, and two groups of transmission teeth are respectively arranged on the two cylindrical portions. Two rotating shafts, i.e., the second rotating shaft 362 and the third rotating shaft 363 or the third rotating shaft 363 and the fourth rotating shaft 364, are respectively disposed in the shaft holes of the two cylindrical portions. The driven link 321/322 has only one end engaged with the middle link 331/332 so that the driven link 321/322 has a set of drive teeth. The driven link 321/322 is provided with a fourth rotating shaft 364 and a fifth rotating shaft 365 or a first rotating shaft 361 and a second rotating shaft 362, so that the driven link 321/322 is provided with two cylindrical portions which are respectively arranged at two ends of the driven link 321/322, and the fourth rotating shaft 364 and the fifth rotating shaft 365 or the first rotating shaft 361 and the second rotating shaft 362 are respectively arranged in shaft holes of the two cylindrical portions. A set of drive teeth are provided on the driven link 321/322 on a periphery of a cylindrical portion adjacent the middle link 331/332.

One end of the first rotating shaft 361 is disposed in the shaft hole of the cylindrical portion of the first row of driving linkage 311, and the other end is disposed in the shaft hole of one cylindrical portion of the adjacent second row of driven linkage 322. One end of the second rotating shaft 362 is disposed in the shaft hole of the cylindrical portion of the middle link 331 of the first row close to the driving link 311, and the other end is disposed in the shaft hole of the other cylindrical portion of the driven link 322 of the adjacent second row. One end of the third rotating shaft 363 is disposed in the shaft hole of the other cylindrical portion of the first row middle linkage member 331, and the other end is disposed in the shaft hole of one cylindrical portion of the middle linkage member 332 of the adjacent other row, i.e., the second row. One end of the fourth rotating shaft 364 is disposed in the shaft hole of one cylindrical portion of the driven link 321 of the first row, and the other end is disposed in the shaft hole of the other cylindrical portion of the middle link 332 of the second row. The fifth rotating shaft 365 is disposed in the shaft hole of the other cylindrical portion of the driven link 321 of the first row, and the other end is disposed in the shaft hole of the cylindrical portion of the driving link 312 of the second row.

The linkage piece is provided with spacing portion towards the tip department of another adjacent linkage piece of same row, and when two adjacent linkage pieces rotated each other to predetermineeing the position, the spacing portion mutual butt of two adjacent linkage pieces to the relative rotation angle of two adjacent linkage pieces of restriction, and then can restrict the angle that two structures expand relatively. The preset position is a preset maximum angle at which the two linkage pieces can rotate relatively.

As shown in fig. 9, the driving linkage member 312 is provided with a limiting portion 391, the middle linkage member 332 is provided with a limiting portion 392, and the two limiting

portions

391 and 392 are disposed oppositely. Of course, the limiting portions are not limited to be disposed on the active linkage member and the middle linkage member, and two adjacent linkage members in the same row may be disposed with opposite limiting portions.

In this embodiment, the biggest angle that two structures can expand is 180, and when two structures rotated through linkage hinge 3 and expanded to 180, the spacing portion mutual butt of two adjacent linkage pieces to avoid two structures to continue relative rotation and drag the flexible screen, cause the destruction to the flexible screen. Here, in other embodiments, the maximum angle at which the two structural members can be unfolded may be changed by providing the position of the limiting portion on the linkage member, and if the limiting portion is not provided, the two structural members may be relatively rotated by 360 °.

As shown in fig. 11 and 12, the surface of each linkage piece facing the bending direction of the linkage hinge 3 is a convex arc surface, and the outer surface of the linkage hinge 3 after being folded and bent is integrally arc-shaped by using the arc surfaces, so as to support the flexible display screen and avoid damaging the flexible display screen. When linkage hinge 3 is in the expanded state, the arcwall face interconnect of the adjacent linkage piece of same row for adjacent linkage piece butt each other can restrict the maximum angle that linkage hinge 3 expanded, avoids forming the space between the linkage piece simultaneously, with effective support flexible display screen 100. When the linkage hinge 3 is in a bending state, the arc surfaces of the adjacent linkage members in the same row are separated from each other by a gap, and each arc surface can be consistent with the arc of the flexible display screen 100 after being bent, so that the flexible display screen 100 is prevented from being damaged.

The spacing portion of linkage piece is located between driving gear and the arcwall face to avoid spacing portion to the meshing of two linkage pieces crooked to cause the influence, do benefit to the machine-shaping of spacing portion simultaneously.

Further, as shown in fig. 13 and 14, the linkage hinge 3 further includes a plurality of shields 34, and each shield 34 is covered at the engagement portion of two adjacent linkage members. More specifically, the shield 34 includes two side plates disposed opposite to each other, and a fixing plate fixed between the two side plates, and the engagement portion of two adjacent link members is located between the two side plates of the corresponding shield 34. A gap is provided between the shroud 34 and the linkage to avoid excessive friction between the two affecting rotational flexibility.

In this embodiment, there are four shrouds 34, two shrouds 34 being provided in each row of linkages, one shroud 34 being housed at the engagement location of the driving linkage 311/312 with the middle linkage 331/332 and the other shroud 34 being housed at the engagement location of the middle linkage 331/332 with the driven linkage 321/322.

As shown in fig. 14, the shield 34 is provided with a limit protrusion 341, when two adjacent linkage members rotate to a certain angle, the limit protrusions 341 covering between two shield 34 in the same row abut against each other, and the limit protrusion 341 can limit the rotation angle when the two linkage members engage and rotate, thereby limiting the relative rotation angle of the two structural members. In the present embodiment, when the two structural members are completely spread out to 180 °, the stopper protrusions 341 of the adjacent two shrouds 34 abut against each other.

Each shield 34 is provided with a sleeve hole 340, and the engaged rotating shafts of two adjacent linkage members in the same row are rotatably arranged through the sleeve holes 340 of the shields 34. Taking one of the shields 34 as an example, the shield 34 is sleeved at the meshing position of the driving linkage 311 and the middle linkage 331, two sleeve holes 340 are respectively disposed on each side plate of the shield 34, a first rotating shaft 361 on the driving linkage 311 penetrates one sleeve hole 340, and a second rotating shaft 362 on the middle linkage 331 penetrates the other sleeve hole 340. The rotating shaft is rotatably matched with the sleeve hole 340, i.e. the rotating shaft can freely rotate in the sleeve hole 340.

The linkage hinge further includes an end shield 35, the end shield 35 being housed at an end of the driven linkage 321/322 remote from the middle linkage 331/332. The driven link 321/322 is protected at its ends by the end shield 35. In this embodiment, there are two driven linkages 321/322 and two corresponding end shields 35.

End shield 35 includes two sideboard, and the medium plate, and two sideboard sets up relatively, and the medium plate is fixed between two sideboard. The end of the driven link 321/322 is received between the two side panels. Both the two side plates are provided with side holes 350, a fifth rotating shaft 365 or a first rotating shaft 361 on the driven linkage piece 321/322 penetrates through the side holes 350, and the fifth rotating shaft 365 or the first rotating shaft is in running fit with the side holes 350. The fifth rotation shaft 365 or the first rotation shaft 361 is engaged with the side hole 350, so that the end shield 35 and the driven link 321/322 can be easily assembled.

In the unfolding state of the bendable terminal, the rotating axes of the linkage pieces are positioned on the same plane, the plane can form a reference plane in the unfolding and folding processes of the bendable terminal, and parts which are not positioned on the reference plane can move relative to the linkage hinge 3 in the unfolding and folding processes of the bendable terminal, so that extrusion or pulling on other parts is avoided or reduced.

When the bendable terminal is changed from the unfolded state to the folded state, the reference plane is bent, the bending radius of the part positioned outside the bending of the reference plane is larger than the bending diameter change of the reference plane, and the part positioned outside the bending of the reference plane moves towards the position close to the folding center relative to the linkage hinge 3.

In this embodiment, the flexible display screen 100 and the supporting sheet 23 thereof are located at the outer side of the bending of the reference plane formed by the linkage hinge 3, and the length dimensions of the flexible display screen 100 and the supporting sheet 23 cannot be changed during the folding process, so that the flexible display screen and the supporting sheet 23 need to move to a position relatively close to the folding center during the folding process relative to the linkage hinge 3. At this time, if the first supporting member 21 and the second supporting member 22 of the supporting assembly 200 are fixedly connected to the two structural members, the first supporting member 21 and the second supporting member 22 cannot shift during the folding process, which may cause stretching of the flexible display screen 100, and therefore during the folding process, the first supporting member 21 and the second supporting member 22 need to be able to translate a certain distance to the folding center, that is, when the flexible display screen 100 is bent, the first supporting member 21 and the second supporting member 22 slide relatively to the linkage hinge 3, so that the flexible display screen 100 and the supporting assembly 200 move together, and meanwhile, the appearance of the folded bendable terminal is better. Further, when the flexible display screen is bent 100, the first/second supports 21/22 slide relative to the linkage hinge 3 by a distance greater than the distance that the sliding plate 24 slides relative to the support plate 23.

In order to realize the linkage displacement of the casing 400, the maximum relative rotation angle needs to be transferred to a driven gear 303 on the first structural member 301 and a driven gear 303 on the second structural member 302 as much as possible, the two driven gears 303 are rotatably connected to the first structural member 301 and the second structural member 302, and the two driven gears 303 respectively drive the first supporting member 21 and the second supporting member 22 to move relative to the first structural member 301 and the second structural member 302, so as to realize the linkage displacement of the casing 400.

As shown in fig. 15 to 18, the driving assembly includes an angle conversion mechanism, an angle enlargement mechanism, and an angle transmission mechanism linked with the linkage hinge. When the linkage hinge 3 rotates relative to the structural member, the angle conversion mechanism converts the rotation angle of the linkage hinge 3 relative to the structural member into displacement to drive the first support 21 to slide relative to the connection device 300. The angle amplification mechanism amplifies the rotation angle of the linkage hinge 3 relative to the structural member and inputs the amplified rotation angle to the angle conversion mechanism. The angle transmission mechanism is connected between the linkage hinge 3 and the angle amplification mechanism, and transmits the rotation angle of the linkage hinge 3 relative to the structural member to the angle amplification mechanism.

The angle transmission mechanism 37 may be used to output the angle of rotation of the first member relative to the second member. The angle transmission mechanism further comprises a first gear and a second gear which is rotationally connected with the first gear; the first gear is fixedly arranged relative to the second component; the second gear is rotationally connected with the first component, and when the first component rotates relative to the second component, the first gear transmits the rotation angle of the second component relative to the first component to the second gear and outputs the rotation angle.

The first part and the second part are both rotationally connected to a limiting part, the rotational centers of the first part and the second part are different, specifically, the first part and the second part can directly rotate through meshing, so that the first part and the second part rotate relatively, and the rotational centers are different. Here, in other embodiments, the first member and the second member may be rotationally connected through a gear or a gear set. The first component and the second component are respectively and rotatably connected with the limiting component, so that the first component and the second component can respectively rotate through meshing, and the first component and the second component can be determined according to the specific application positions of the first component and the second component to be rotatably connected with corresponding structures in the using device.

The connecting device further comprises a rotating member, and the angle transmission mechanism 37 can output the rotating angles of the first part and the second part to the rotating member so as to enable the rotating member to rotate relative to the first part or the second part. In this embodiment, the rotating member is rotatably connected to the first member, and when the first member rotates relative to the second member, the rotation angle between the first member and the second member can be transmitted to the rotating member through the angle transmission mechanism, so that the rotating member rotates relative to the first member. Here, in other embodiments, the rotating member may also be slidably connected to the first member.

In this embodiment, the first part includes the driving link 311 and a structural member 301, which are fixedly connected to form a whole, and the second part is the middle link 331. It will be appreciated that the first member may also include only the active link 311, and the second member may be the middle link 331; or the first part is the active linkage 312 and the second part is the middle linkage 332; or a first component comprising the entirety of the active linkage 312 and the structural member 302, and a second component being the middle linkage 332; or the first part and the second part are any two adjacent linkage pieces in the same row.

The driving link 311 and the middle link 331 are connected to the driven link 322 of the other row, and the driven link 322 of the other row forms the aforementioned limiting member. When the first part and the second part are the other linkage parts, the limiting part is the adjacent linkage part in the other row. The two angle conversion mechanisms are respectively and correspondingly connected with the two supporting pieces, so that the two supporting pieces can respectively slide relative to the two structural pieces. The driven gear 303 forms the aforementioned rotating member. The driving link 311 is engaged with the middle link 331, that is, adjacent ends of the first and second members are engaged with each other.

Each connecting device comprises two angle transmission mechanisms which are respectively arranged on the two structural components and correspondingly and directly or indirectly connected with the two supporting components, namely a first supporting component 21 and a second supporting component 22. The third rotation shaft 363 is located at or near the center of the linkage hinge when bending, since the angle transmission mechanism 37 needs to be connected with the first support 21 and the second support 22, the angle transmission mechanism 37 is far from the third rotation shaft 363 relative to the second rotation shaft 362 or far from the third rotation shaft 363 relative to the fourth rotation shaft 364.

The two angle-transmitting mechanisms 37 are identical in construction. The fitting relationship between the angle transmission mechanism 37 and the first support 21 is the same as that between the other angle transmission mechanism 37 and the second support 22. The following description will be made with respect to a connection relationship between the angle transmission mechanism 37 and the first support 21 as an example.

The angle transmission mechanism 37 transmits the relative rotation angle change between the linkage members to the first and

second supports

21 and 22, so that the first and

second supports

21 and 22 can move correspondingly with the folding or bending of the bendable terminal, thereby preventing or reducing the stretching or pressing of the flexible display screen 100.

The angle transmission mechanism 37 includes a first gear 371 and a second gear 372 rotatably connected to the first gear 371, the first gear 371 is fixedly disposed relative to the middle link 331, and a central axis of the first gear 371 is a rotation axis of the middle link 331 when the middle link 331 is engaged to rotate, that is, a rotation axis of the middle link 331 relative to the driven link 322 of another row. The second gear 372 is rotatably connected to the driving linkage member 311, and a central axis of the second gear 372 is a rotation axis of the driving linkage member 311 during meshing rotation, that is, a rotation axis of the driving linkage member 311 relative to the driven linkage member 322 of the other row. When the driving link 311 rotates relative to the middle link 331, the first gear 371 transmits the rotation angle of the middle link 331 relative to the driving link 311 to the second gear 372 for output.

The distance between the first gear 371 and the second gear 372 is kept constant when the driving link 311 rotates relative to the middle link 331. In this embodiment, since the driving linkage piece 311 is engaged with the middle linkage piece 331, the distance between the rotation centers of the driving linkage piece 311 and the middle linkage piece 331 is kept constant during the rotation process, the first gear 371 is overlapped with the rotation center of the middle linkage piece 331, and the second gear 372 is overlapped with the rotation center of the driving linkage piece 311, so that the distance between the first gear 371 and the second gear 372 can be kept constant all the time during the relative rotation process of the first part and the second part (in this embodiment, the driving linkage piece 311 and the middle linkage piece 331).

The first gear 371 and the second gear 372 rotate synchronously when the driving link 311 rotates relative to the middle link 331, so that the rotation of the first gear 371 is transmitted to the second gear 372, and the second gear 372 rotates. In this embodiment, the angle transmission mechanism 37 further includes an intermediate gear 373 rotatably connected to the first gear 371 and the second gear 372, the first gear 371 and the second gear 372 are rotatably connected via the intermediate gear 373, and the intermediate gear 373 is engaged with the first gear 371 and the second gear 372, so that the rotation of the first gear 371 can be transmitted to the second gear 372. Here, in other embodiments, the first gear 371 and the second gear 372 may also be synchronously rotated by a belt drive, a chain drive, or other manners.

The driven gear 303 is rotatably connected to the first structural member 301, the driving linkage 311 is fixedly connected with the first structural member 301 as a whole, and the driven gear 303, the driving linkage 311 and the first structural member 301 as a whole can rotate relative to the second gear 372. Driven gear 303 is connected with second gear 372 transmission, and when second gear 372 rotated, second gear 372 can drive driven gear 303 action for driven gear 303 rotates first structural component 301 relatively, and driven gear 303 can drive first support piece 21 and first subshell 410 and remove after being connected with first support piece 21 transmission.

In other embodiments, the active link 311 may not be fixedly connected with the first structural member 301 as a whole, but may be two separate elements. At this time, the driving link 311 may be fixedly or movably connected to the first structural member 301 by a rotating shaft, a connecting rod, a buckle, or the like.

Because the driven gear 303 rotates along with the driving linkage piece 311 relative to the second gear 372, in the rotating process, the distance between the rotating axis of the driven gear 303 and the rotating axis of the second gear 372 is kept unchanged, and the distance between the rotating axis of the driven gear 303 and the rotating axis of the first gear 371 is constantly changed, namely, when the first component rotates relative to the second component, the distance between the rotating piece and the second gear is kept unchanged, and the distance between the rotating piece and the first gear is changed, so that the driven gear 303 and the first gear 371 cannot be directly in transmission connection; the distance between the rotation axis of the driven gear 303 and the rotation axis of the second gear 372 does not change during the rotation, and the transmission between the first gear 371 and the driven gear 303 can be realized through the cooperation of the intermediate gear 373 and the second gear 372.

The first gear 371 and the middle linkage member 331 are coaxially and fixedly arranged, the middle linkage member 331 is used as a stationary reference object, when the driving linkage member 311 and the middle linkage member 331 are engaged and rotated, the driving linkage member 311 rotates around the rotation axis of the engagement rotation of the driving linkage member 311 and the middle linkage member 331, namely, the central axis of the second gear 372, and simultaneously the driving linkage member 311 and the first rotating shaft 361 integrally rotate around the engagement rotation axis of the middle linkage member 331, namely, the central axis of the second rotating shaft 362, and the first gear 371 and the second gear 372 synchronously rotate when the driving linkage member 311 rotates relative to the middle linkage member 331, namely, the first gear 371, the middle gear 373 and the second gear 372 are engaged and transmitted, so that the second gear 372 rotates relative to the driving linkage member 311, and according to the transmission ratio between the first gear 371 and the second gear 372, the second gear 372 is combined with the relative rotation angle of the second gear 372 relative to the driving linkage member 311, the relative rotation angle between the active linkage 311 and the middle linkage 331 can be determined.

In the present embodiment, the transmission ratio between the first gear 371 and the second gear 372 is 1, specifically, the first gear 371 and the second gear 372 have the same size and shape, i.e. the number of teeth is the same, and the rotation angles of the first gear 371 and the second gear 372 are kept the same. Because the intermediate gear 373 is disposed between the first gear 371 and the second gear 372, and the shape, size, and number of teeth of the three are the same, the intermediate gear 373 can transmit the rotation state of the first gear 371 to the second gear 372, i.e. the rotation direction and rotation angle of the second gear 372 and the first gear 371 are the same. When the driving linkage 311 and the second gear 372 rotate together around the central axis of the first gear 371 with the first gear 371 being a stationary reference object, the driving linkage 311 rotates around the central axis of the second gear 372, but the second gear 372 does not rotate relative to its own central axis, and the rotation angle of the driving linkage 311 relative to the second gear 372 is the rotation angle of the driving linkage 311 relative to the middle linkage 331.

Here, in other embodiments, if the transmission ratio between the first gear 371 and the second gear 372 is less than 1, the rotation angle of the second gear 372 relative to the first gear 371 around its own axis is large, that is, the relative rotation angle between the second gear 372 and the active link 311 is larger than the relative rotation angle between the middle link 331 and the active link 311, so that the relative rotation angle between the middle link 331 and the active link 311 is enlarged. Conversely, if the transmission ratio between the first gear 371 and the second gear 372 is greater than 1, the relative rotation angle between the middle link 331 and the driving link 311 can be reduced.

In this embodiment, the number of teeth of the intermediate gear 373 is equal to the number of teeth of the first gear 371 and the second gear 372, and the rotation axes of the first gear 371, the second gear 372 and the intermediate gear 373 are located on the same plane, so that the three gears have the same shape, and are convenient to process and prepare and assemble. In other embodiments, the number of teeth of the intermediate gear 373 is smaller than the number of teeth of the first gear 371 and the second gear 372, so that the size of the intermediate gear 373 is relatively small, which is beneficial for reducing the volume of the entire angle transmission mechanism 37.

The first gear 371 is coaxially and fixedly connected with the middle linkage member 331 through the second rotating shaft 362, so that the first gear 371 and the middle linkage member 331 are relatively fixedly arranged and can rotate simultaneously. More specifically, the first gear 371 and the second shaft 362 are integrally formed, and the second shaft 362 is circumferentially located and matched with the shaft hole of the middle linkage member 331, so that the second shaft 362 passes through the middle linkage member 331 as the second component, and when the middle linkage member 331 rotates, the middle linkage member 331 can drive the second shaft 362 and the first gear 371 to rotate. Here, in other embodiments, the first gear 371 may also be provided with a shaft hole, and the second rotating shaft 362 may be circumferentially positioned and matched with the shaft hole of the first gear 371 so that the two can rotate simultaneously. The first rotating shaft 361 and the second rotating shaft 362 respectively penetrate through the second gear 372 and the first gear 371 of the angle transmission mechanism, and the first rotating shaft 361 and the second rotating shaft 362 can be used as rotating shafts in the linkage hinge and can also be used as rotating shafts in the angle transmission mechanism, so that components are simplified, and processing and preparation are facilitated. Optionally, a part of the outer side surface of the second rotating shaft 362 penetrating through the shaft hole of the middle link 331 forms a plane, and a plane corresponding to the second rotating shaft 362 in the shaft hole also forms a plane, so that circumferential positioning is achieved through cooperation between the two planes. Of course, in other embodiments, the second rotating shaft 362 and the middle linking member 331 can be directly fixed by welding, bonding, or the like.

The second gear 372 is rotatably connected to the driving link 311 through a first rotating shaft 361, and the first rotating shaft 361 passes through the driving link 311 as a first member, so that the second gear 372 and the driving link 311 can rotate relatively. More specifically, the second gear 372 is coaxially fixed to the first rotating shaft 361, and the driving link 311 is rotatably connected to the first rotating shaft 361 around a central axis of the first rotating shaft 361, so that the driving link 311 and the second gear 372 can rotate relatively.

The angle transmission mechanism 37 further includes two guard plates 374, the two guard plates 374 are parallel to each other and are disposed opposite to each other, the first gear 371, the second gear 372 and the intermediate gear 373 are disposed between the two guard plates 374, and the first gear 371 and the second gear 372 are both rotatably disposed opposite to the guard plates 374. The angle transmission mechanism 37 further includes an intermediate shaft 3730 passing through the intermediate gear 373 and avoiding the interlocking hinge to avoid interference with the rotation of each link member of the interlocking hinge. The intermediate gear 373 is rotatably connected to the two guard plates 374 through an intermediate shaft 3730. The two guard plates 374 can protect the meshing rotation of the first gear 371, the second gear 372 and the middle gear 373, and facilitate the assembly of the middle gear 373. The intermediate gear 373 is fixedly connected with the intermediate shaft 3730, each guard plate 374 is provided with an intermediate through hole, and two ends of the intermediate shaft 3730 rotatably penetrate through the intermediate through holes respectively. In other embodiments, the intermediate shaft 3730 may be fixedly connected to the two guard plates 374, and the intermediate gear 373 may be rotatably connected to the intermediate shaft 3730.

As shown in fig. 17, each guard plate 374 is further provided with a first through hole 3741 and a second through hole 3742, the first rotating shaft 361 is rotatably inserted through the first through hole 3741 of the two guard plates 374, and the second rotating shaft 362 is rotatably inserted through the second through hole 3742 of the two guard plates 374.

The angle transmission mechanism 37 further includes a sheath (not shown in the figure), the two guard plates 374 are sleeved with the sheath, and a closed space is formed between the two guard plates, the first gear 371, the intermediate gear 373, and the second gear 372 are all disposed in the closed space, so as to ensure that the engagement between the three is not interfered by the outside, and the stability of the rotation operation is ensured.

Because the rotation angle between two adjacent linkage pieces is kept consistent, the relative rotation angle between two structural parts can be determined according to the number of the linkage pieces, and therefore the relative folding angle between two end parts of the bendable terminal is determined. Depending on the angle of the relative folding between the two ends or the angle of relative rotation between the two structural members, the distance the support member should be translated relative to the structural members can be derived.

Assuming that the relative rotation angle between the first structural member 301 and the second structural member 302 is v, that is, the rotation angle between the first row of the active link 311 and the second row of the active link 312 is v, the middle rotation shaft, that is, the third rotation shaft 363, is set to be relatively stationary, and due to the linkage among the plurality of links, with respect to the horizontal plane where the third rotation shaft 363 is located: the rotation angle of the middle link 331 in the first row is v/5/2 ═ v/10(v is an absolute value of the angle), and the rotation angle of the second rotating shaft 362 penetrating through the middle link 331 in the first row relative to the third rotating shaft 363 is v/10; the angle of rotation v/5+ v/10 of the driven link 321 in the first row is 3v/10, and the angle of rotation v/5+ 2+ v/10 of the driving link 312 in the second row is v/2; the rotation angle of the middle linkage piece 332 in the second row is v/10, the rotation angle of the driven linkage piece 322 in the second row is 3v/10, the rotation angle of the driving linkage piece 311 in the first row is v/2, and the rotation angle of the first rotating shaft 361 penetrating through the driving linkage piece 311 in the first row is v/2. The rotation angle of the first rotating shaft 361 relative to the second rotating shaft 362 is smaller than the rotation angle of the first rotating shaft 361 relative to the third rotating shaft 363.

Taking the two rows of driving linkage parts 311,312 relatively rotating by 75 degrees as an example, relative to the horizontal plane where the third rotation shaft 363 is located, the rotation angle of the middle linkage part 331 in the first row is-7.5 degrees (taking the counterclockwise direction as the positive direction), the rotation angle of the driven linkage part 321 is 22.5 degrees, and the rotation angle of the driving linkage part 311 is-37.5 degrees; in the second row, the active linkage 312 has a rotational angle of 37.5 degrees, the middle linkage 332 has a rotational angle of 7.5 degrees, and the slave linkage 322 has a rotational angle of-22.5 degrees. It can be seen that the relative rotation angle between adjacent two linkage members in the same row is twice the relative rotation angle between adjacent two linkage members in different rows. Meanwhile, the relative rotation angle between two adjacent linkage pieces in the front row and the back row is 15 degrees. Because the relative rotation angle between two adjacent linkage pieces in the front row and the back row is the same, the relative rotation angle between two adjacent linkage pieces in the front row and the back row can be judged according to the relative rotation angle between two structural parts and the number of the linkage pieces, and then the relative rotation angle of the associated linkage pieces can be transmitted according to the angle transmission mechanism, so that the movement distance of the two supporting pieces relative to the structural parts is determined.

The connection device 300 further includes an angle amplification mechanism, the angle amplification mechanism includes a structural member and an acceleration gear set disposed on the structural member, and the input angle is amplified by the acceleration gear set and then output. Through the angle amplification mechanism, the relative rotation angle of the two parts can be amplified and then output, so that the other part has a larger rotation angle. In this embodiment, the angle amplification mechanism is applied to the bendable terminal, and the angle amplification mechanism amplifies the angle input by the angle transmission mechanism and outputs the angle. The input angle is the rotation angle of the second gear relative to the first gear. The output angle is the rotation angle of the driven gear. The driven gear can have a larger rotation angle by utilizing the angle amplification mechanism, so that the first supporting piece and the second supporting piece can move relatively for a larger distance, and the pulling or extrusion on the flexible display screen is avoided or reduced.

The accelerating gear set comprises a first accelerating gear 381 and a second accelerating gear 382 which are sequentially arranged along the direction from the angle input end to the angle output end, the first accelerating gear 381 is meshed with the second accelerating gear 382, the number of teeth of the first accelerating gear 381 is greater than that of the second accelerating gear 382, so that the rotating angle of the first accelerating gear 381 is smaller than that of the second accelerating gear 382, and the rotating angle is enlarged. The rotational axis of the first acceleration gear 381 is perpendicular to the rotational axis of the second acceleration gear 382, so that the rotational axis direction can be changed to realize angular transmission of a large distance with less space. Further, the first accelerating gear 381 and the second accelerating gear 382 are both bevel gears to realize the mutual perpendicular of the rotating shafts thereof. It is understood that other gears capable of performing the accelerating function can be used for the first accelerating gear 381 and the second accelerating gear 382.

The acceleration gear set further comprises a third acceleration gear 383 and a fourth acceleration gear 384 which are sequentially arranged along the direction from the angle input end to the angle output end, the third acceleration gear 383 is in transmission connection with the second acceleration gear 382, the third acceleration gear 383 is meshed with the fourth acceleration gear 384, and the number of teeth of the third acceleration gear 383 is greater than that of the fourth acceleration gear 384. The rotation angle of the second acceleration gear 382 can be transmitted to the fourth acceleration gear 384 through the third acceleration gear 383, and the number of teeth of the third acceleration gear 383 is larger than that of the fourth acceleration gear 384, so that the rotation angle of the second acceleration gear 382 can be further enlarged.

The third acceleration gear 383 is disposed coaxially with the second acceleration gear 382, and the rotation axis of the fourth acceleration gear 384 is perpendicular to the rotation axis of the third acceleration gear 383 so that the rotation axis of the fourth acceleration gear 384 and the rotation axis of the first acceleration gear 381 are parallel to each other. Preferably, the fourth acceleration gear 384 and the third acceleration gear 383 are both bevel gears. It is understood that other gears capable of performing the acceleration function can be used for the third acceleration gear 383 and the fourth acceleration gear 384.

The angle enlarging mechanism further comprises a transmission shaft 389 connected with the accelerating gear set, and internal transmission of the accelerating gear set can be achieved through the transmission shaft 389, so that long-distance transmission is achieved. Specifically, the third accelerating gear 383 and the second accelerating gear 382 are coaxially and fixedly connected through a transmission shaft 389, so that the linkage of the two is realized. Here, in other embodiments, the third acceleration gear 383 and the second acceleration gear 382 may also be directly fixedly connected, or may be in transmission connection through other gears. In this embodiment, the second rotation shaft 362 is perpendicular to the transmission shaft 389.

When the linkage hinge is in the unfolding state, the second rotating shaft 362 is coplanar with the transmission shaft 389; when the linkage hinge is in a bending state, the second rotating shaft 362 is opposite to the transmission shaft 389.

In this embodiment, the first structural member 301 is used as a structural member for mounting and carrying the acceleration gear set, the driven gear 303 is rotatably disposed on the first structural member 301, the rack 388 is fixedly disposed on the first support 21, and the driven gear 303 is engaged with the rack 388. The driven gear 303 and the rack 388 may serve as an angle conversion mechanism that is linked with the linked hinge. When the interlocking hinge rotates relative to the first structure 301, the angle conversion mechanism converts the rotation angle of the interlocking hinge relative to the first structure 301 into displacement to drive the first support 21 to slide relative to the connecting device. The second gear 372 and the driven gear 303 are driven by the speed-up gear set 38, and the movement of the first support 21 is achieved by the engagement between the driven gear 303 and the rack 388. Because second gear 372 and first pivot 361 are coaxial fixed connection, first accelerating gear 381 sets up coaxial fixed connection with first pivot 361, can realize the coaxial fixed connection between second gear 372 and the first accelerating gear 381 for the both circumference is fixed, can rotate simultaneously.

By means of the matching of the transmission shaft 389 and the bevel gears, the transmission distance can be prolonged, so that the distance from the rotating axis of the driven gear 303 to the rotating axis of the second gear 372 is large, the problem of over concentration of elements is avoided, the driving of the supporting piece and the shell 400 is facilitated, and the transmission stability can be guaranteed.

The rotation axes of the second gear 372, the transmission shaft 389 and the fourth accelerating gear 384 are located on the same plane, so that the assembly and the connection are convenient, and the thickness of the whole bendable terminal is controlled conveniently. The fourth acceleration gear 384 is coaxial with and fixed relative to the driven gear 303, and is rotatable in synchronization with the driven gear 303. Preferably, the fourth accelerating gear 384 and the driven gear 303 are both coaxially fixed to a rotating shaft rotatably disposed on the structural member 301.

A rack 388 is fixed to the first support member 21, and the length direction of the rack 388 is perpendicular to the rotation axis of the driven gear 303. The driven gear 303 is provided with driven teeth and is engaged with the rack 388. When the driven gear 303 rotates, the rack 388 is driven to move, so as to drive the support and the housing 400 to move.

The transmission ratio between the first gear 371 and the second gear 372 is 1, the transmission ratio between the second gear 372 and the driven gear 303 is less than 1, so that the transmission ratio between the first gear 371 and the driven gear 303 is less than 1, the rotation angle of the driven gear 303 is greater than that of the second gear 372, and the driven gear 303 can drive the rack 388 and the support to generate displacement with a relatively large distance. The transmission ratio between the second gear 372 and the driven gear 303 may be specifically set according to the distance the support needs to translate.

In the present embodiment, the number of teeth of the first speed-up gear 381 is greater than that of the second speed-up gear 382, and the number of teeth of the third speed-up gear 383 is greater than that of the fourth speed-up gear 384. Through two-stage rotation speed amplification, the transmission ratio between the second gear 372 and the driven gear 303 is smaller than 1, and therefore the angle amplification function is achieved. The first structural member 301 is further provided with a rotating portion 3011, the rotating portion 3011 is provided with a rotating hole 3010, the first rotating shaft 361 is rotatably inserted into the rotating hole 3010, and the stability of the first structural member 301 rotating relative to the first rotating shaft 361 can be ensured by the cooperation of the rotating portion 3011 and the first rotating shaft 361. The second gear 372 and the first accelerating gear 381 are disposed between the driving link 312 and the rotating portion 3011, so that the driving link 312 and the rotating portion 3011 can keep a certain distance, thereby further facilitating the stability of the first structure 301 rotating relative to the first rotating shaft 361.

In the above description of the embodiments, it can be seen that the accelerating gear set of the present invention includes two adjacent bevel gears that mesh with each other, and the number of teeth of the bevel gear near the angle conversion mechanism is smaller than that of the bevel gear far from the angle conversion mechanism. The two adjacent bevel gears meshing with each other may be the first acceleration gear 381 and the second acceleration gear 382, and may also be the third acceleration gear 383 and the fourth acceleration gear 384. One of two adjacent and mutually meshed bevel gears is fixed on the transmission shaft 389, namely the second accelerating gear 382 or the third accelerating gear 383 is fixed on the transmission shaft 389; when the other bevel gear is the first accelerating gear 381, the first accelerating gear 381 is fixed on the first rotating shaft 361 and rotates synchronously with the first rotating shaft 361; when the other bevel gear is a fourth acceleration gear 384, the fourth acceleration gear 384 is movably connected to the structure 301.

Here, in other embodiments, the accelerating gear set 38 can also realize the transmission between the second gear 372 and the driven gear 303 for other components such as a belt transmission component, a chain transmission component, a transmission gear set, and the like. The driven gear 303 can also be directly meshed with the second gear 372 to realize transmission. As another way, the transmission assembly includes a first bevel gear, a second bevel gear and a transmission shaft, the first bevel gear is coaxially and fixedly connected with the second bevel gear, the first bevel gear is engaged with the second bevel gear, the second bevel gear is coaxially and fixedly connected with the transmission shaft, the central axes of the first bevel gear and the second bevel gear are perpendicular to the central axis of the second bevel gear, the transmission shaft is rotatably connected to the first structural member, a transmission thread is disposed on the transmission shaft, the driven gear 303 is engaged with the transmission thread, and the transmission thread is rotated to drive the driven gear 303 to rotate, so as to drive the rack and the support to move relative to the first structural member. Further, the driven gear 303 may be omitted and directly engaged with the rack 388 through the driving screw of the driving shaft, and the same or similar effects may be achieved.

The second structure 302 is substantially symmetrical in shape and configuration to the first structure 301, except that one end of the second structure 302 is an active linkage 312 forming a second row. The second structure 302 is also provided with a driving assembly, which is symmetrical to the driving assembly of the first structure 301 in structure and arrangement. The drive assembly on the second structure 302 is used to drive the second support 22 toward the bent position.

In the bending process of the bendable terminal, the flexible display screen 100 located at the upper side may be stretched due to a difference in radius between the upper and lower sides, and thus may be easily damaged. Therefore, in order to prevent the flexible display screen from being stretched, the present invention designs the driving assembly to offset the problem of the increased length of the upper side due to bending. In the bending process, the first supporting piece and the second supporting piece are driven to move in opposite directions through the two groups of driving assemblies, so that the length of the upper side is kept unchanged, and the flexible display screen is prevented or reduced from stretching.

In order to enable the first and second supports to move a longer distance toward each other, a greater rotational angle is required to input the drive assembly to convert to the rotational angle of the driven gear to move the rack 388 a longer distance. As can be seen from the foregoing analysis, the rotation angle of the third rotating shaft relative to the first/second structural member is V/2, which is the maximum during the folding process, and the maximum moving distance of the rack 388 can be achieved if the rotation angle of the third rotating shaft relative to the first/second structural member can be directly inputted into the driving assembly. However, the direct transmission of the relative rotation angle of the third rotating shaft requires a very complicated transmission structure, and in order to simplify the design, the second rotating shaft/the fourth rotating shaft with the second largest relative rotation angle is used as the input end of the angle. The rotation angle of the second rotating shaft/the fourth rotating shaft relative to the first structural member/the second structural member is v/2-v/10-2 v/5. This 2v/5 relative rotation angle is not enough to move the rack a sufficient distance to prevent or greatly reduce the stretching of the flexible display screen after being input into the driving assembly, and therefore an angle enlarging mechanism is required to be arranged in the driving assembly to enlarge the input angle, so that the rack 388 can move a longer distance. In addition, since the support sheet/slide plate supporting the flexible display screen has a certain thickness, the driving assembly needs to further enlarge the input angle in order to further offset the problem of the increase in the difference in the upper and lower radii due to the thickness of the support sheet/slide plate. Therefore, two sets of angle enlarging mechanisms are disposed in the driving assembly to offset the radius difference problem caused by the thickness of the bendable terminal and the thickness of the supporting plate/sliding plate. Of course, it is also feasible to substantially use the third rotating shaft as the angle input end, but the corresponding transmission structure needs to be adjusted, for example, the angle transmission mechanism needs to add a gear, but since the input angle is enlarged to v/2, the driving assembly only needs to design a smaller angle enlarging mechanism to meet the requirement that the flexible display screen is not stretched. In addition, the first rotating shaft/the fifth rotating shaft can also be used as an angle input end, but the driving assembly needs to be designed with more angle amplifying mechanisms. In addition, the angle amplification mechanism in the driving assembly can be increased or reduced according to the actual requirement, or can be replaced by an angle amplification mechanism with other forms.

Further, the present embodiment adopts an angle transmission mechanism to input the rotation angle of the second rotating shaft/the fourth rotating shaft into the driving assembly. The purpose of the angle transmission mechanism adopting three gear transmissions is to ensure mutual meshing between the gears. Since the first accelerating gear is directly and coaxially fixed on the second rotating shaft of the first gear if the angle transmission mechanism has only the first gear, the second accelerating gear 382 at the end of the transmission shaft 389 with fixed length cannot always keep meshing with the first accelerating gear because the distance between the first gear and the driven gear 303 is changed during the folding process. On the other hand, the first gear only causes the angle in the input driving assembly to be reduced, the driving assembly is required to compensate more angles, and the structural design is further complicated. Therefore, in this embodiment, three gears are used to achieve the angle transmission. Of course, three gears are only one preferred way in this embodiment, and in essence, a single gear is also feasible, except that the driving assembly needs to be adjusted accordingly, such as the transmission shaft is made to be telescopic, and an angle enlarging mechanism is added in the driving assembly.

In addition, the present embodiment also employs a sliding plate to further prevent or reduce the flexible display screen from being stretched. If the entire flexible display panel 100 is attached to the support sheet 23 without adding the sliding sheet 24, the flexible display panel may be stretched due to the thickness of the support sheet itself during the folding process. Therefore, the design of the sliding plate is added, one end of the flexible display screen is fixed on the fixed plate of the supporting plate, and the other end of the flexible display screen is fixed on the sliding plate, so that the problem of length stretching caused by the thickness of the supporting plate can be solved by utilizing the sliding of the sliding plate relative to the supporting plate. That is, the present embodiment essentially employs a dual mechanism to prevent the flexible display screen from being stretched, one being the first and second support members that are relatively movable, and the other being the sliding plate and the support member that are relatively movable. Through the dual mechanism, the flexible display screen can be effectively prevented or reduced from being stretched, so that the normal work of the device is ensured. It will be appreciated that any one of the mechanisms may reduce the stretching of the flexible display, i.e. either mechanism may be used alone, but both mechanisms may be used better. Similarly, it is also possible to have only the first structural component and the driving assembly cooperating with the first structural component, and the second structural component and the related components can be omitted, which can also reduce the stretching of the flexible display screen.

The invention also provides a frame module. In this embodiment, the frame module is a middle frame module, and the middle frame module can be applied to various bendable terminals. As shown in fig. 4 and 5, the middle frame module includes a support member, a first frame 4211 and a flexible connecting device. The structure of the supporting component and the connecting device can be the same as the foregoing embodiments, and are not described herein again. The first rim 4211 forms a rim at one end of the bendable terminal in a length direction, and is exposed to an outside of the bendable terminal, constituting a part of an external appearance of the bendable terminal.

It should be understood that the middle frame module is only named for the frame module, and is not limited to the middle position, i.e. the modules located at other positions are also applicable to the present embodiment.

The first frame 4211 is fixed to one end of the support plate 23, and the slide plate 24 is located between the support plate 23 and the first frame 4211 in the sliding direction of the slide plate 24. In the using process, when the end portions of the middle frame module and the bendable terminal receive external force, the sliding plate 24 is located between the supporting sheet 23 and the first frame 4211, the external force can act on the first frame 4211 and cannot directly act on the sliding plate 24, so that the external force cannot be transmitted to the flexible display screen 100, and the flexible display screen 100 is prevented from being arched to cause damage.

The length direction of the first frame 4211 is perpendicular to the sliding direction of the sliding plate 24, and both ends of the first frame 4211 are bent toward the sliding plate 24, so that the length of the first frame 4211 is utilized to effectively ensure that the external force is completely applied to the first frame 4211 when the bendable terminal receives the external force at one end.

The opposite ends of the second support member 22 of the support assembly are respectively fixedly connected with one end of the support sheet 23 and the first frame 4211, and the second support member 22 can be used for fixedly arranging one end of the support sheet 23 and the first frame 4211, so that the assembly and the connection are convenient. More specifically, in the supporting piece 23, an end of the bendable piece 232 away from the fixing piece 231 is fixed opposite to the first rim 4211, and the two are fixedly connected by the second supporting piece 22. Here, one end of the support plate 23 may be fixed to the first rim 4211 by other internal structural members of the bendable terminal.

The middle frame module further comprises two second frames 4212, the two second frames 4212 are respectively positioned at two ends of the first frame 4211, the sliding plate 24 is positioned between the two second frames 4212, and the length direction of the second frames 4212 is parallel to the sliding direction of the sliding plate 24; the two second rims 4212 are fixedly coupled to both ends of the first rim 4211. The second middle frame 421 is formed by the first frame 4211 and the two second frames 4212, and the sliding plate 24 can be surrounded, so that an external force is prevented from acting on the sliding plate 24, and the flexible display screen 100 is effectively prevented from being damaged. The second back shell 422 can be fixedly connected with the second middle frame 421 and the second supporting member 22 into a whole.

In this embodiment, the sliding plate 24 is slidably connected to the second support member 22, and in other embodiments, the second support member 22 may not be provided, and the sliding plate 24 may be slidably provided between the two second rims 4212, both side edges of the sliding plate 24 may be slidably connected to the two second rims 4212, respectively, and one end of the support sheet 23 may be fixedly connected to one end of the second rim 4212 away from the first rim 4211. The middle frame module further includes a third frame 4213, where the third frame 4213 is located at the other end of the bendable terminal in the length direction and exposed outside the bendable terminal to form a part of the appearance of the bendable terminal, that is, the first frame 4211 and the third frame 4213 are located at the two ends of the bendable terminal in the length direction, respectively. The third frame 4213 is fixedly disposed relative to the other end of the support plate 23, and specifically, in the support plate 23, one end of the fixing piece 231, which is far away from the bendable piece 232, is fixedly disposed relative to the support plate 23, or the whole fixing piece 231 is fixedly disposed with the support plate 23. In this embodiment, the third frame 4213 is fixedly connected to the first supporting member 21, the first supporting member 21 is a flat plate, and the fixing piece 231 is attached to and fixed to the first supporting member 21, so that the third frame 4213 is fixedly connected to the other end of the supporting member 23. The flexible display 100 is attached to the fixing plate 231 at the end, so that the components of the flexible display 100 at the end are fixed as a whole, and when the third frame 4213 is subjected to an external force, the flexible display 100 is not arched at the end. Here, in other embodiments, the third frame 4213 may be directly fixedly connected to the other end of the support sheet 23. The third rim 4213 may be bent at both ends thereof toward the first rim 4211 to form the first middle rim 411 and enclose the support piece 23 to provide a protection effect to the internal structure.

In this embodiment, the housing of the bendable terminal further includes a first front case 413 and a second front case 423, the first front case 413 is fixedly connected to the third rim 4213, and the second front case 423 is fixedly connected to the first rim 4211. Further, the first front case 413 may be fixedly connected to the first support 21. The second front shell 423, the first rim 4211 and the second supporting member 22 may be fixedly connected as a whole, and may be integrally formed, so as to facilitate manufacturing and assembling. The first front shell 413 may be fixedly connected to the first support 21, and the first front shell 413, the first support 21 and the third rim 4213 may be integrally connected to each other, so as to facilitate manufacturing and assembling.

When the end of the flexible terminal is subjected to external force, the external force is used for the second supporting piece 22 to enable the second supporting piece 22 to move linearly through the first frame 4211, the sliding plate can be driven to slide together in the sliding process of the second supporting piece, and the sliding of the sliding plate can drive one end of the flexible display screen to slide along with the sliding, so that one end of the screen is arched. Therefore, when the end of the bendable terminal is squeezed by two hands or impacted by an external force, the flexible display screen may be arched, which may easily cause damage to the flexible display screen. On the other hand, when the one end at the second frame place of holding between the fingers flexible terminal with the hand, the upper surface of flexible display screen is pressed to the finger of upside, and the lower surface of second dorsal scale is pressed to the finger of downside, and if the dynamics of holding between the fingers is great, when the terminal of crooked flexible simultaneously, because the pressure of finger, the position of flexible display screen is fixed, will unable relative second dorsal scale and second support piece slide, also arouse the condition that flexible display screen damaged easily.

In order to solve the above problem, as shown in fig. 19 to 22, the present invention further provides another embodiment of the frame module. The frame module in this embodiment may be a middle frame module. A middle frame module comprises a sliding plate, a supporting piece and a back shell, wherein the sliding plate is fixed on the back shell and can slide relative to the supporting piece, and the supporting piece is positioned between the sliding plate and the back shell. Wherein the back shell may be the second back shell 422, the support may be the second support 22, and the sliding plate 24 may be fixed to the back shell and slidably connected to the support.

In this embodiment, the first frame 4211 of the middle frame module is fixedly connected to the second support member 22, the second support member 22 is fixedly connected to one end of the support sheet 23, so that the first frame 4211 is relatively fixed to one end of the support sheet 23, the sliding plate 24 is slidably disposed between the first frame 4211 and one end of the support sheet 23, when the end portions of the middle frame module and the bendable terminal receive an external force, the external force acts on the first frame 4211 due to the sliding plate 24 being located between the support sheet 23 and the first frame 4211, so that the first frame 4211 and the second support member 22 move, and the second support member 22 and the sliding plate 24 are in sliding fit and can move relative to each other, so that the external force does not directly act on the sliding plate 24, and therefore the external force is not transmitted to the flexible display screen 100, and the flexible display screen 100 is prevented from being arched and damaged.

The two ends of the first frame 4211 in the length direction are bent towards the support sheet 23 to form bent portions 4211a, the bent portions 4211a can be located at corners of the bendable terminal, when external force is applied to corners of the bendable terminal or the bendable terminal falls to touch the corners, the external force can act on the bent portions 4211a at the ends of the first frame 4211, and therefore the flexible display screen 100 cannot be directly applied to force, and damage caused by arching of the flexible display screen 100 is avoided. When the third frame 4213 slides inwards under the action of external force, the phenomenon that the other end or the middle part of the flexible display screen 100 is arched can also be avoided.

The second supporting member 22 is a flat plate, and the second supporting member 22 may be integrally formed with the first rim 4211, so as to facilitate manufacturing and assembling. The middle of the second supporting member 22 is provided with a hollow area 221 to reduce the weight and the occupied space, and other structures or electronic elements may be disposed in the hollow area 221 of the second supporting member 22. The area of the hollow-out area 221 may be greater than 3/4 of the entire area of the second support 22, so as to make the best use of the spatial area of the second support 22.

The second back shell 422 is fixedly connected with the sliding plate 24, the second supporting member 22 is slidably disposed between the second back shell 422 and the sliding plate 24, one end of the flexible display screen 100 is fixedly connected with the sliding plate 24, so that the second back shell 422, the sliding plate 24 and one end of the flexible display screen 100 are relatively fixedly disposed, when one end of the sliding plate 24 of the flexible terminal is held with a hand, the upper surface of the flexible display screen 100 is pressed by the fingers on the upper side, and the lower surface of the second back shell 422 is pressed by the fingers on the lower side, because the flexible display screen 100 is fixed relative to the second back shell 422, the sliding of the flexible display screen 100 and the sliding plate 24 relative to the second supporting member 22 is not affected, so that the folding and unfolding of the flexible terminal are not affected, and the damage of the flexible display screen is not caused.

The two second rims 4212 of the middle frame module are fixedly connected to the sliding plate 24, the two second rims 4212 can slide along with the sliding plate 24, and external force is blocked from acting on the sliding plate 24 only by the first rim 4211. Since the length direction of the second frame 4212 is parallel to the sliding direction of the sliding plate 24, it is difficult to slide the sliding plate 24 when an external force is applied to the second frame 4212. The first frame and the second frame jointly form the outer contour of the middle frame module.

The second frame 4212 protrudes out of the sliding plate 24 and faces the plate surface of the second support member 22, the second frame 4212 abuts against the second back shell 422, the edge of the flexible display screen 100 and the edge of the second back shell 422 can be sealed by the second frame 4212, and the second support member 22 is located between the two second frames 4212, so as to facilitate sealing of the bendable terminal. The second front case 423 is fixedly connected to the sliding plate 24, so that the second front case 423 can move along with the sliding plate 24 and the flexible display screen 100, thereby preventing a gap from being formed between the end of the flexible display screen 100 and the second front case 423 only after the flexible display screen 100 moves along with the sliding plate 24, and simultaneously, the second front case 423 can protect the end of the flexible display screen 100. When the user's finger is pressed between the second front case 423 and the end of the flexible display screen 100, the movement of the flexible display screen 100 is not affected. The second front housing 423 and the second back housing 422 are fixed, so that when the user pinches the second front housing 423 and the second back housing 422, the movement of the flexible display screen 100 is not affected. The second front shell 423, the sliding plate 24 and the two second rims 4212 may be integrally formed to form an integral component, so as to facilitate the manufacturing and assembling.

The second front case 423 is connected to the second back case 422 through a connector. In this embodiment, the connecting member is a snap structure 43, so that the assembly is convenient and the connection strength can be improved. More specifically, the fastening structure 43 includes a hook 431 and a slot 432, the hook 431 is fixedly disposed on the second back shell 422, the slot 432 is fixedly disposed on the second front shell 423, and the second front shell 423 is fixedly connected to the second back shell 422 through the matching of the hook 431 and the slot 432. The plurality of the snap structures 43 may be arranged along the length direction of the first rim 4211 to further improve the connection strength between the second front shell 423 and the second back shell 422. In other embodiments, the hook 431 may be fixedly disposed on the second front case 423, and the corresponding slot 432 may be fixedly disposed on the second back case 422. Alternatively, the second front shell 423 and the second back shell 422 may also be fixedly connected by other methods, such as adhesion, welding, screw locking, magnetic attraction, and the like.

The second support member 22 has a slot formed therein. In this embodiment, the open slot is a locking slot 222, the locking structure 43 is located in the locking slot 222, and in the sliding direction of the sliding plate 24, the size (or length) of the locking slot 222 is greater than the size (or length) of the locking structure 43, so that the locking structure 43 can slide in the locking slot 222, and the second supporting member 22 is prevented from affecting the connection and sliding between the second back shell 422 and the second front shell 423.

A spring is also provided between the second support 22 and the slide plate 24. The spring force generated by the spring is parallel to the sliding direction of the second support 22 relative to the sliding plate 24. By providing a spring, the second support 22 may automatically spring back to the initial state when the flexible display 100 is changed from the bent to the unfolded state.

The second back shell 422 is provided with a connecting boss 4221, the connecting boss 4221 protrudes towards the sliding plate 24, the connecting boss 4221 is located at the inner surface of the second rim, and the connecting boss 4221 and the second rim 4212 are fixedly connected through a screw, so that the second rim 4212 and the second back shell 422 are fixedly connected. The plurality of connecting protrusions 4221 may be arranged along the length direction of the second rim 4212 to improve the connecting strength between the second back shell 422 and the second rim 4212.

At one end of the bendable terminal where the sliding plate 24 is disposed, through the structural cooperation among the sliding plate 24, the second supporting plate 22, the first frame 4211, the second back shell 422, and the like, the bending and unfolding of the bendable terminal can be prevented from being affected by the arching of the flexible display screen 100 when the end is subjected to an external force by a user's hand.

The end of the second support 22 is located between the end of the sliding plate 24 and the end of the second back shell 422, and the end of the second support 22 is close to the end of the sliding plate 24 and the end of the second back shell 422. When the middle frame module is unfolded, the end of the second supporting member 22 is recessed or flush with the end of the sliding plate 24 and the end of the second back shell 422. Here, the end of the second support 22, the end of the sliding plate 24, and the end of the second back shell 422 refer to the end of the second support 22, the end of the sliding plate 24, and the end of the second back shell 422, which are far away from the bending center of the bendable terminal. When the middle frame module is bent, the end of the second supporting member 22 protrudes from the end of the sliding plate 24 and the end of the second back shell 422. Therefore, through the flush or concave design during expansion, the terminal of the flexible terminal will not act on the terminal of the second supporting member 22 when being impacted by external force, or the force acting on the terminal of the second supporting member 22 when being impacted by external force can be reduced, so that the flexible display screen 100 will not be arched.

The flexible display screen 100, the fixing sheet 231 of the supporting sheet 23, the first supporting member 21, the third frame 4213 and the first back shell 412 are fixedly connected to form an integral body at one end where the first supporting member 21 is disposed, as can be seen in the foregoing embodiments. For example, the other support member (i.e., the first support member) is fixed to the opposite end of the support sheet. When the third frame 4213 at the end part is subjected to external force, the whole body can slide inwards, so that the flexible display screen cannot be arched at the position.

Other elements not shown or mentioned in the present embodiment are the same as those in the previous embodiments, and reference may be made to the previous embodiments.

The flexible display screen used in this embodiment may also be replaced by other types of flexible screens, such as a flexible touch screen, a flexible light-emitting screen, and the like.

It should be understood that the relative rotation angle between the rotating shafts in the embodiments of the present invention refers to the rotation angle of one rotating shaft relative to another rotating shaft in a three-dimensional space, and does not include the self-rotation angle of the rotating shaft around its center line.

Compared with the structural member of the existing electronic device, the frame module provided by the invention has different forms, namely the forms are more diversified, and more requirements can be met.

Compared with the structural member of the existing electronic device, the bendable mechanism provided by the invention has different forms, namely, the forms are more diversified, and more requirements can be met.

Compared with the structural member of the existing electronic device, the linkage hinge provided by the invention has different forms, namely the forms are more diversified, and more requirements can be met.

Compared with the structural member of the existing electronic device, the angle transmission mechanism provided by the invention has different forms, namely the forms are more diversified, and more requirements can be met.

Compared with the structural member of the existing electronic device, the angle amplification mechanism provided by the invention has different forms, namely the forms are more diversified, and more requirements can be met.

Compared with the structural member of the conventional electronic device, the screen supporting structure provided by the invention has different forms, namely the forms are more diversified, and more requirements can be met.

The above embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

The linkage hinge is characterized by comprising a plurality of linkage parts, wherein the linkage parts are arranged into at least two rows, each linkage part is provided with a plurality of transmission teeth, adjacent linkage parts in the same row are meshed through the transmission teeth, so that the adjacent linkage parts can be meshed to rotate, and the adjacent linkage parts in the same row are respectively connected to the same linkage part in the other row through rotating shafts in a rotating mode.
The linked hinge of claim 1, wherein each of said linkage members rotates synchronously when the linked hinge is flexed.
The linked hinge of claim 1, wherein the relative rotational angle between adjacent linkage members in different rows is the same.
The linked hinge of claim 1, wherein rotation of any of said linkage members in said linked hinge rotates all other linkage members.
The linked hinge of claim 1, wherein the relative rotation angle between adjacent ones of the linkage members in the same row is twice the relative rotation angle between adjacent ones of the linkage members in different rows.
The linked hinge according to claim 1, wherein each of the link members has a cylindrical portion, the plurality of gear teeth of each of the link members are provided on an arc-shaped cylindrical surface of the cylindrical portion, and the rotating shaft is inserted through a center of the cylindrical portion.
The linkage hinge according to claim 1, wherein a limiting portion is provided at an end portion of the linkage member facing another adjacent linkage member in the same row, and when two adjacent linkage members rotate to a predetermined position, the limiting portions of two adjacent linkage members abut against each other to limit a relative rotation angle of the two adjacent linkage members.
The linked hinge according to claim 1, further comprising a plurality of shields, each shield being provided at the engagement of two adjacent link members.
The linkage hinge according to claim 8, wherein the shield is provided with a sleeve hole, and the rotating shaft is rotatably inserted into the sleeve hole.
A linked hinge according to any one of claims 1 to 9, wherein the surface of said link member facing the direction of bending of said linked hinge is an arcuate surface.
The linked hinge of claim 10, wherein the arcuate surfaces of adjacent links in a row are interconnected when the linked hinge is in the deployed state.
The linked hinge of claim 10, wherein the arcuate surfaces of adjacent links in a row are spaced apart when the linked hinge is in the flexed condition.
The linked hinge of claim 10, wherein the drive teeth of the linkage member are spaced from the arcuate surface.
A linked hinge according to any one of claims 1 to 9, wherein the links of each row are staggered with respect to adjacent links of the other row.
A connection device, characterized in that it comprises two structural members and a ganged hinge according to any one of claims 1 to 14;

the linkage pieces in each row are the same in number, the linkage piece positioned at one end of the row and only rotationally connected with one linkage piece in the other adjacent row in each row is an active linkage piece, and the two active linkage pieces between the two adjacent rows are respectively and fixedly connected with the two structural parts; or,

the number of the linkage pieces contained in the two adjacent rows of the linkage pieces is different from 1, and the two linkage pieces positioned at two ends in the row with more number are respectively and fixedly connected with the two structural parts.
A bendable terminal comprising the ganged hinge of any one of claims 1-14.
The flexible terminal of claim 16, further comprising a flexible display screen and two structural members connecting the linked hinges, the flexible display screen comprising a first flat portion, a second flat portion, and a curved portion connected between the first flat portion and the second flat portion; the first straight portion and the second straight portion are respectively opposite to the two structural members, and the bending portion is opposite to the linkage hinge.