CN111828462B - Rotating mechanism, folding mechanism and communication equipment - Google Patents

Reference numerals: u-shaped

housing

10,

body

11,

blocking plate

12, receiving

space

13,

left support frame

210,

first support plate

211, first connecting

plate

212,

guide

213,

guide groove

214,

right support frame

220,

second support plate

221, second connecting

plate

222,

support plate

30,

main support plate

310,

first shaft hole

311,

first mounting hole

312,

side plate

313,

fifth pin

3131,

sixth pin

3132,

second mounting hole

3133,

sub-support plate

314,

cable hole

315,

left support plate

320,

second shaft hole

321,

third pin

322,

right support plate

330, third shaft hole 331,

fourth pin

332,

first pin

340,

second pin

350, left

connecting rod assembly

410, left first connecting

rod

411, left connecting

rod assembly

411, and right connecting rod assembly the first hinge assembly comprises a left first connecting

end

4111, a left second connecting

rod

412, a left second connecting end 4121, a

seventh pin

4122, a right first connecting

rod

421, a right second connecting

rod

422, a left connecting

arm

610, a right connecting

arm

620, a

first groove

630, a

second groove

640, a first

sliding groove

650, an

eighth pin

651, a second

sliding groove

660, a

limiting hole

670, a

rotating mechanism

50, a first rotating

shaft

510, a

gear

511, a rotating

shaft support

512, a first through

hole

5121, a second through

hole

5122, a

mounting hole

5123, a limiting

part

5124, a rotating

control part

513, a

spring

514, a

gasket

515, a

nut

516, a

cam

530, a

first lug

5301, an arc-shaped notch 5303, a

concave wheel

540, a

second lug

5401, a second rotating

shaft

520 and a

flexible screen

70.

As shown in fig. 1 to 3, the embodiment of the present application provides a folding mechanism, which can be used for folding a

flexible display screen

70. The folding mechanism of the present application can be applied to an electronic device having a

flexible display screen

70, such as a mobile phone, a computer, an electronic watch, and the like. The folding mechanism includes a

U-shaped housing

10, a

left support

210, a

right support

220, a

support plate

30 that can be folded and unfolded, and a

link assembly

410.

The supporting

plate

30 includes a main supporting

plate

310, and a left supporting

plate

320 and a right supporting

plate

330 disposed at left and right sides of the main supporting

plate

310 and rotatably connected to the main supporting

plate

310, respectively. The

support plate

30 provides support for the

flexible display

70 in the unfolded state, and the

support plate

30 forms a receiving space (not shown) for receiving a bent portion of the

flexible display

70 in the folded state. When the folding mechanism is folded, the

flexible display screen

70 supported on the supporting

plate

30 is bent, and since the

flexible display screen

70 has a certain thickness, the length of the outer arc surface thereof is lengthened and the length of the inner arc surface thereof is compressed and shortened during the folding process. Although the

flexible display

70 has a small change in the length of the inner and outer arcs during the folding process, the folding mechanism must accommodate the change in the length of the inner and outer arcs of the

flexible display

70, which may cause a squeezing and damage to the

flexible display

70.

It should be noted that, in the present embodiment, for convenience of production and assembly, the left and right support frames 210 and 220, the left and

right support plates

320 and 330, and the left and right connecting

rod assemblies

410 and 410 (not shown) are symmetrically disposed on the left and right sides of the

main support plate

310 within an error range. Of course, in other embodiments of the invention, the structure may not be symmetrical.

In some embodiments of the present invention, a hinge structure may be disposed between the

main support plate

310 and the

left support plate

320 or the

right support plate

330, wherein one possible way is to provide first shaft holes 311 on both sides of the

main support plate

310, and provide a

second shaft hole

321 on the inner side of the left support plate 320 (i.e., the side close to the main support plate 310), and the

first pin

340 simultaneously passes through the first shaft holes 311 on the left side of the

main support plate

310 and the second shaft holes 321 on the

left support plate

320, so as to enable the

left support plate

320 to rotate around the

first pin

340, thereby achieving the rotational connection between the

left support plate

320 and the

main support plate

310. Similarly, a third axial hole 331 is formed at the inner end of the right support plate 330 (i.e., the side close to the main support plate 310), and the

second pin

350 is inserted through the first

axial hole

311 at the right side of the

main support plate

310 and the third axial hole 331 of the

right support plate

330, so that the

right support plate

330 can rotate around the

second pin

350.

Specifically, referring to fig. 1 and 5, the

main support plate

310 includes a

sub-support plate

314, and a pair of

side plates

313 formed by bending and extending from two ends of the

sub-support plate

314 toward the

U-shaped housing

10. The left and right sides of the

sub-support plate

314 are symmetrically provided with 2 first shaft holes 311, and the 2 first shaft holes 311 on the same side are respectively arranged near two ends of the

sub-support plate

314. The inner side of the

left support plate

320 is provided with 4 second shaft holes 321, and each end thereof is provided with 2 second shaft holes 321. At the same end, the

first shaft hole

311 at the left end of the

sub-supporting plate

314 is disposed between the 2 second shaft holes 322 of the

left supporting plate

320, and the

first pin shaft

340 is fixed to form a hinge portion through the 2 second shaft holes 321 and the 1

first shaft hole

311 at the same time. The two ends of the

sub-supporting plate

314 and the

left supporting plate

320 are respectively provided with 1 hinge part, so that the

left supporting plate

320 is more stable in the rotating process; meanwhile, the

flat cable hole

315 for the flat cable to pass through is formed between the 2 hinge portions of the

sub-support plate

314 and the

left support plate

320, so that the structure of the folding mechanism can be more compact. The

right support plate

330 is connected to the

sub-support plate

314 in the same manner, and will not be described again.

Referring to fig. 3, in the present embodiment, the

U-shaped housing

10 includes a

body

11 and blocking

plates

12 disposed at two ends of the

body

11, a bottom surface of the

body

11 extends upward to form a cylindrical table 111 near the two ends, a threaded hole is disposed on the cylindrical table 111 along a top surface thereof toward the bottom surface of the

body

11, first mounting

holes

312 are disposed at corresponding positions at two ends of the

main support plate

310, and a pair of bolts passes through the first mounting

holes

312 and the threaded holes on the cylindrical table 111 to fix the

main support plate

310 on the

U-shaped housing

10. The

side plate

313 is disposed above the blocking

plate

12 or on a side of the blocking

plate

12 away from the cylindrical table 111. The main supporting

plate

310 and the

U-shaped housing

10 enclose a receiving

space

13, and the receiving

space

13 can be used for receiving components such as cables and rotating shafts, so that the folding mechanism has a more compact structure and a smaller volume.

Two ends of the

left support plate

320 far away from one side of the

main support plate

310 are provided with L-shaped notches, a

third pin shaft

322 is formed by extending the bottom surface of the L-shaped notches along the length direction of the

left support plate

320, and a guide groove matched with the

third pin shaft

322 is formed in the

left support frame

210. Specifically, the

left support bracket

210 includes a

first support plate

211, 2

guide members

213 disposed along the length direction of the support plate, and a pair of

first connection plates

212,2

guide members

213 formed by bending and extending from both ends of the

first support plate

211 toward the

main support plate

310, which are fixed to both ends of the

first support plate

211 and correspond to the positions of the "L" shaped notches in the

left support plate

320. The

guide

213 has a

guide groove

214, and the

third pin

322 is disposed in the

guide groove

214. In the folding process of the folding mechanism, the

guide member

213 slides along the

left support frame

210 and the

third pin

322 along the side wall of the

guide groove

214, and drives the

left support plate

320 to rotate around the

first pin

340.

Similarly, two ends of the

right support plate

330, which are away from the

main support plate

310, are provided with "L" -shaped notches, a

fourth pin shaft

332 is formed by extending from the bottom surface of the "L" -shaped notch along the length direction of the

right support plate

320, and the

right support frame

220 is provided with a guide slot adapted to the

fourth pin shaft

332. Specifically, the

right support bracket

220 includes a

second support plate

221 disposed along a length direction of the support plate, guide

members

213, and

second connection plates

222 extending from both ends of the

second support plate

221 toward the

main support plate

310, the

guide members

213 being fixed to both ends of the

second support plate

221. The

guide

213 has a

guide groove

214, and the

fourth pin

332 is disposed in the

guide groove

214. In the folding process of the folding mechanism, the

guide member

213 slides along the

right support frame

220 and the

third pin

332 along the side wall of the

guide slot

214, and drives the

right support plate

330 to rotate around the

second pin

350.

In this embodiment, each link assembly has a first connecting end rotatably connected to the

U-shaped housing

10 and a second connecting end rotatably connected to the

left support frame

210 or the

right support frame

220.

Specifically, two pairs of connecting rod assemblies are symmetrically arranged on the left side and the right side of the U-shaped

outer cover

10. The left pair of

link assemblies

410 are disposed at both ends of the

left support plate

320, respectively, and the right pair of link assemblies are disposed at both ends of the

right support plate

330, respectively. Each linkage assembly comprises a first link (411. One end of the left first connecting

rod

411 and one end of the left second connecting

rod

412 are both provided with through holes, and a pin shaft is simultaneously inserted into the through holes on the left first connecting

rod

411 and the left second connecting

rod

412 to form a hinge structure. The other end of the left first connecting

rod

411 is a first connecting

end

4111 of the left connecting

rod assembly

410, and the other end of the left second connecting

rod

412 is a second connecting end 4121 of the left connecting

rod assembly

410. The right link assembly is identical in structure to the

left link assembly

410 and will not be described again.

Referring to fig. 3 to 5, a pair of

fifth pins

3131 are formed by extending left ends (ends close to the left supporting frame 210) of the

side plates

313 at two ends of the main supporting plate to a side away from the

accommodating space

13, and a pair of

sixth pins

3132 are formed by extending right ends (ends close to the right supporting frame 220) of the

side plates

313 to a side away from the

accommodating space

13. The other end of the first link 411 (i.e., the left first connection end 4111) of the pair of

left link assemblies

410 is provided with a mounting hole adapted to a

fifth pin

3131, and the

first link

411 can be rotated about the

fifth pin

3131 by inserting the

fifth pin

3131 into the mounting hole of the

first link

411. One end of the right

first link

421 of the pair of right link assemblies is provided with a mounting hole adapted to the sixth pin 121, and the right

first link

421 can rotate around the

sixth pin

3132 by inserting the sixth pin 121 into the mounting hole of one end of the right

first link

421.

The pair of first connecting

plates

212 on the

left support frame

210 are respectively provided with a mounting hole, the other end of the left second connecting

rod

412 in the pair of left connecting

rod assemblies

410 extends towards one side of the

left support frame

210 to form a

seventh pin

4122, and the

seventh pin

4122 is inserted into the mounting hole (not shown) of the first connecting

plate

212 for fixing, so that the left second connecting

rod

412 can rotate around the

seventh pin

4122. In this embodiment, each left connecting

rod assembly

410 includes a left first connecting

rod

411 and a left second connecting

rod

412, one end of the left first connecting

rod

411 is hinged to one end of the left second connecting

rod

412, the other end of the left first connecting

rod

411 is rotatably connected to the

fifth pin

3131 on the U-shaped housing, and the other end of the left second connecting

rod

412 is rotatably connected to the connecting

plate

212 on the

left supporting frame

210, so that the left first connecting

rod

411, the left second connecting

rod

412 and the left supporting

frame

210 form a left crank block mechanism. When the folding mechanism is folded, one end of the second link 412 (i.e. the left first connection end 4111) drives the

left support frame

210 to move in a direction away from the

U-shaped housing

10 during rotation, so as to compensate for the change of the outer arc length of the

flexible display screen

70 during folding, and prevent the

flexible display screen

70 from being damaged due to being squeezed during folding. The pair of right link assemblies are arranged in the same manner as the left side and will not be described again.

In the folding process of the folding mechanism, the

first support plate

211 of the

left support frame

210 and the

second support plate

221 of the

right support frame

220 approach each other in the folding process, and drive the left and right connecting rod assemblies to rotate, one end of the second connecting rod (412), namely the second connecting end of the connecting rod assembly, moves towards one end (namely the first connecting end of the connecting rod assembly) far away from the first connecting rod (411), so that the

left support frame

210 and the

right support frame

220 are driven to move towards the direction far away from the U-shaped

outer cover

10, and the change of the outer arc length of the

flexible display screen

70 in the folding process is compensated. Meanwhile, the

first support plate

211 and the

second support plate

221 drive the

guide member

213 thereon to rotate, and the

guide member

213 drives the

third pin

322 and the

fourth pin

332 to slide along the side wall of the

guide groove

214, and drives the

left support plate

320 and the

right support plate

330 to rotate, so as to fold the

support plate

30.

Referring to fig. 3 and 7, the folding mechanism further includes a

rotating mechanism

50, a

left connecting arm

610, and a

right connecting arm

620. The

rotating mechanism

50 includes a pair of first

rotating shafts

510 and a pair of second

rotating shafts

520, wherein the first

rotating shafts

510 and the second

rotating shafts

520 are respectively provided with a

gear

511, and the

gear

511 is fixedly connected with the first

rotating shafts

510 and the second

rotating shafts

520. Specifically, the folding mechanism includes a pair of rotating

mechanisms

50. The pair of second

rotating shafts

520 of each

rotating mechanism

50 is arranged between the pair of first

rotating shafts

510, the pair of second

rotating shafts

520 are provided with a pair of

gears

511 which are meshed with each other, the pair of

gears

511 on the pair of first

rotating shafts

510 are respectively meshed with the

gears

511 on the second

rotating shafts

520 on the same side, and the pair of first

rotating shafts

510 and the pair of second

rotating shafts

520 realize synchronous rotation through 2 pairs of

gears

511, so that the synchronous rotation of the left side and the right side of the main supporting

plate

310 is realized. The pair of second

rotating shafts

520 is disposed between the pair of first

rotating shafts

510, so that the stability of the

rotating mechanism

50 can be effectively increased, and the distance between the pair of first

rotating shafts

510 is increased, so that the accommodating space for accommodating the bent portion of the

flexible display screen

70 formed after the folding mechanism is folded is larger.

In other embodiments of the present invention, the rotating

mechanism

50 may also include only one pair of first

rotating shafts

510, and a pair of

gears

511 on the pair of first

rotating shafts

510 are engaged with each other to realize the synchronous rotation of the pair of first

rotating shafts

510.

In this embodiment, the

main support plate

310 and the

U-shaped housing

10 enclose to form an

accommodating space

13, and the

rotating mechanism

50 is disposed in the

accommodating space

13; the

side plates

313 at both ends of the

main support plate

310 are provided with second mounting

holes

3133 communicated with the

accommodating space

13, one ends of the pair of first

rotating shafts

510 pass through the pair of second mounting

holes

3133 to extend outwards and are respectively fixedly connected with the inner ends (ends close to the U-shaped outer cover) of the

left connecting arm

610 and the

right connecting arm

620, and the other ends of the pair of first

rotating shafts

510 are suspended in the

accommodating space

13. In the present embodiment, the rotating

mechanism

50 is disposed in the

accommodating space

13, so that interference of external conditions to the

rotating mechanism

50 can be reduced, and stability of the folding mechanism can be improved.

A

gear

511, a rotating

shaft supporting member

512, a

rotating control member

513, a

spring

514, a

gasket

515 and a

nut

516 are sequentially sleeved on a pair of first

rotating shafts

510 of the

rotating mechanism

50. The rotating

shaft supporting member

512 is fixed on one surface of the main supporting

plate

310, which is away from the flexible screen, one end of the

rotating control member

513 is abutted to the rotating

shaft supporting member

512, the other end of the rotating control member is abutted to one end of the

spring

514, the other end of the

spring

514 is abutted to the

gasket

515, the

gasket

515 is abutted to the

nut

516, the suspended end of the first

rotating shaft

510 is provided with a threaded structure, and the pair of

nuts

516 are locked at the end part of one end of the first

rotating shaft

510, which is suspended in the

accommodating space

13. In the embodiment, the

nut

516 and the thread on the first

rotating shaft

510 are engaged to provide a stable and durable locking force, so as to provide a stable and durable supporting force for the

gasket

515, thereby effectively improving the stability of the

rotating mechanism

50.

Specifically, a mounting

hole

5123 is formed on the top surface of the rotating

shaft supporting member

512, and a bolt passes through the mounting

hole

5123 to fix the rotating

shaft supporting member

512 on the bottom surface of the

U-shaped housing

10. A pair of first through

holes

5121 and a pair of second through

holes

5122 are formed on the lateral surface of the rotating

shaft supporting member

512, and the pair of first

rotating shafts

510 pass through the pair of first through

holes

5121 and can rotate in the first through

holes

5121. The pair of second

rotary shafts

520 pass through the pair of second through

holes

5122 and can rotate in the second through

holes

5122.

The

rotation control member

513 includes a pair of

cams

530 and a

concave wheel

540 engaged with the

cams

530, the

cams

530 are fixed on the first

rotating shaft

510 and rotate with the first

rotating shaft

510, a pair of through holes (not shown) are provided on the

concave wheel

540, the

concave wheel

540 is sleeved on the pair of first

rotating shafts

510 through the through holes, the engaging surface between the

cams

530 and the

concave wheel

540 is a tooth-shaped structure, and when the folding mechanism is folded, the

concave wheel

540 can slide along the first

rotating shaft

510 to press the

spring

514.

Specifically, the

cam

530 extends outward toward a surface of the

concave wheel

540 to form a plurality of first

protruding tabs

5301, and a plurality of first recesses (not shown) are formed between two adjacent first

protruding tabs

5301. A second concave part (not marked in the figure) matched with the first

convex piece

5301 and a second

convex piece

5401 matched with the first concave part are arranged on one surface, facing the

cam

530, of the

concave wheel

540, and the side surfaces of the first convex piece, the second convex piece, the first concave part and the second concave part are all smooth inclined surfaces. When the folding mechanism is in an unfolded or folded state, the

first protruding piece

5301 and the first recess on the

concave wheel

540 are engaged with the second recess and the

second protruding piece

5401 on the

cam

530, respectively, so that the folding mechanism is maintained in the unfolded or folded state. When the folding mechanism starts to fold, the

cam

530 rotates along with the first

rotating shaft

510, that is, the

first tab

5301 rotates along with the first

rotating shaft

510, the

first tab

5301 slides along the side wall of the second recess during the rotation and presses the

concave wheel

540, the

concave wheel

540 slides along the first

rotating shaft

510 and presses the

spring

514 to deform the spring, when the

first tab

5301 passes over the adjacent

second tab

5401 and enters into the adjacent second recess, a hand or a sound for indicating that the folding is in place is generated, the

first tab

5301 is clamped into the second recess under the restoring force of the

spring

514, and the

spring

514 returns to the initial state. The number of the first protruding

pieces

5301, the number of the second protruding

pieces

5401, and the torsion force when the folding mechanism folds can be set according to specific requirements.

Referring to fig. 7 and 8, in the present embodiment, an arc-shaped notch 5303 is formed at an end of the

cam

530 far away from the

concave wheel

540, and a position of the

rotating shaft support

512 corresponding to the arc-shaped notch 5303 is provided with a

limit block

5124 for limiting a rotating direction and a maximum rotating amplitude of the first

rotating shaft

510. For example, when the folding mechanism is folded outwards in the unfolded state or when the folding mechanism has rotated to a preset maximum rotation angle, the limiting

block

5121 abuts against the side wall of the arc-shaped notch 5303 to prevent the pair of first

rotating shafts

510 from rotating relatively. The side face of the limiting

block

5121 can be abutted against the side wall of the arc-shaped notch 5303 in a large area, so that a large acting force can be borne.

Referring to fig. 1 and fig. 6, in the present embodiment,

first grooves

630 are respectively formed on the surfaces of the

left connecting arm

610 and the

right connecting arm

620 facing the supporting

plate

30, and the first link (411. The surfaces of the

left connecting arm

610 and the

right connecting arm

620, which face away from the supporting

plate

30, are provided with

second grooves

640, and the second connecting rod (412. Projection surfaces of the

first groove

630 and the

second groove

640 are at least partially overlapped, a first sliding

groove

650 is arranged at the overlapped part, and the first sliding

groove

650 is communicated with the

first groove

630 and the

second groove

640. One end of the first connecting rod (411. The bottom surface of the

second groove

640 is provided with a second sliding

groove

660, a

seventh pin

4122 on the second connecting rod passes through the second sliding

groove

660 and is inserted into the mounting hole of the first connecting

plate

212 for fixation, and the

seventh pin

4122 can slide along the second sliding

groove

660. The

first groove

630 is adapted to the motion track of the first connecting rod, the

second groove

640 is adapted to the motion track of the second connecting rod, the first sliding

groove

650 is adapted to the rotation track of the eight-

pin

651, and the second sliding

groove

660 is adapted to the rotation track of the seven-

pin

4122.

1. The folding mechanism is characterized by comprising a U-shaped outer cover, a left supporting frame, a right supporting frame, a foldable and unfoldable supporting plate, a connecting rod assembly, a left connecting arm, a right connecting arm and a rotating mechanism, wherein the U-shaped outer cover, the left supporting frame, the right supporting frame, the foldable and unfoldable supporting plate, the connecting rod assembly, the left connecting arm, the right connecting arm and the rotating mechanism are arranged on the outer cover

The supporting plate comprises a main supporting plate, a left supporting plate and a right supporting plate, the left supporting plate and the right supporting plate are arranged on the left side and the right side of the main supporting plate and are respectively rotatably connected with the main supporting plate, and the main supporting plate is fixed on the U-shaped outer cover;

the left support frame and the right support frame are both provided with guide grooves, the left support plate and the right support plate are both provided with pin shafts, the left support plate is supported on the left support frame, and the pin shafts on the left support plate are inserted into the guide grooves of the left support frame and can slide along the guide grooves; the right support plate is supported on the right support frame, and a pin shaft on the right support plate is inserted into a guide groove of the right support frame and can slide along the guide groove;

the connecting rod assemblies are arranged on the left side and the right side of the U-shaped outer cover, each connecting rod assembly is provided with a first connecting end and a second connecting end, the first connecting ends are rotatably connected with the U-shaped outer cover, the second connecting ends are rotatably connected with the left supporting frame or the right supporting frame, and when the folding mechanism is folded, the second connecting ends move towards the direction far away from the first connecting ends and drive the left supporting frame and the right supporting frame to move towards the direction far away from the U-shaped outer cover; when the folding mechanism is unfolded, the second connecting end moves towards the direction close to the first connecting end, and the left supporting frame and the right supporting frame are driven to move towards the direction close to the U-shaped outer cover;

the main supporting plate and the U-shaped outer cover enclose to form an accommodating space, and the rotating mechanism is arranged in the accommodating space; side plates at two ends of the main supporting plate are provided with through holes communicated with the accommodating space, one ends of a pair of first rotating shafts penetrate through the through holes to extend outwards and are fixedly connected with the inner ends of the left connecting arm and the right connecting arm respectively, and the other ends of the pair of first rotating shafts are suspended in the accommodating space;

the outer end of the left connecting arm is connected with the left supporting frame in a sliding manner;

the outer end of the right connecting arm is connected with the right supporting frame in a sliding manner;

the rotating mechanism comprises a rotating shaft supporting piece, a pair of first rotating shafts, a rotating control piece, a spring, a gasket and a nut, wherein the rotating control piece, the spring, the gasket and the nut are sequentially sleeved on the pair of first rotating shafts;

the rotating shaft supporting piece is provided with a through hole, the pair of first rotating shafts penetrate through the pair of through holes and can rotate in the through holes, each first rotating shaft is provided with a gear, and the pair of first rotating shafts synchronously rotate through the gears on the first rotating shafts;

the rotating control piece comprises a pair of cams, the cams are fixed on the first rotating shaft and can rotate along with the first rotating shaft, the length of the rotating control piece along the direction of the first rotating shaft is changed within a preset range in the rotating process of the cams, an arc-shaped notch is formed in one end, abutted against the rotating shaft supporting piece, of the cams, and a limiting portion matched with the arc-shaped notch is arranged on the rotating shaft supporting piece.

2. The folding mechanism of claim 1 wherein said rotational control member further comprises a concave wheel cooperating with said pair of cams, said concave wheel being disposed over and rotationally coupled to said pair of first shafts, and wherein mating surfaces of said cams and said concave wheel are of a toothed configuration.

3. The folding mechanism of claim 2 wherein said cam extends outwardly toward a face of said pocket wheel to form a plurality of first tabs, a plurality of first recesses are formed between adjacent first tabs, said pocket wheel has a face toward said cam provided with a second recess cooperating with said first tabs, and a second tab cooperating with said first recesses, and said first, second, first and second recesses are smoothly sloped on their sides.

4. The folding mechanism of claim 1, wherein the rotating mechanism further comprises a pair of second rotating shafts, the shaft support member is provided with a through hole for the pair of second rotating shafts to pass through, the pair of second rotating shafts is disposed between the pair of first rotating shafts, the pair of second rotating shafts are provided with gears, the gears of the pair of second rotating shafts are engaged with each other, and each gear of the first rotating shaft is engaged with a gear of an adjacent second rotating shaft.

5. The folding mechanism of claim 1, wherein said linkage assembly includes a first link and a second link, one end of said first link being hingedly connected to one end of said second link, the other end of said first link being a first connecting end of said linkage assembly, the other end of said second link being a second connecting end of said linkage assembly.

6. The folding mechanism of claim 5 wherein said left and right connecting arms have first recesses on their sides facing said support plate, said first link being disposed within said first recesses and rotatable therein;

one surfaces of the left connecting arm and the right connecting arm, which are far away from the supporting plate, are provided with second grooves, the second connecting rod is arranged in the second grooves, the projection surfaces of the first grooves and the second grooves are at least partially overlapped, the at least partially overlapped parts are provided with first sliding grooves, and the first sliding grooves are communicated with the first grooves and the second grooves;

one end of the first connecting rod and one end of the second connecting rod are both provided with through holes, and a pin shaft penetrates through the first sliding groove and is respectively inserted into the through holes of the first connecting rod and the second connecting rod for fixation;

the other end of the second connecting rod extends outwards towards one surface of the supporting plate to form a pin shaft, a second sliding groove is formed in the bottom surface of the second groove, and the pin shaft on the second connecting rod is inserted into the second sliding groove and can slide in the second sliding groove;

the shapes of the first groove, the second groove, the first sliding groove and the second sliding groove are matched with the rotating track of the connecting rod assembly.

7. The folding mechanism of claim 1, wherein a limiting hole is formed on a surface of the left connecting arm and a surface of the right connecting arm facing away from the supporting plate, a limiting member is disposed on the left supporting frame and the right supporting frame, and the limiting member is disposed in the limiting hole and can slide along the limiting hole.

8. The folding mechanism of claim 1 wherein a line hole is provided between said main support plate and said left support plate and/or said right support plate.

9. A communication device comprising a flexible display and a folding mechanism according to any of claims 1 to 8.