CN110332217B

CN110332217B - Synchronizing mechanism, folding display device and communication equipment

Info

Publication number: CN110332217B
Application number: CN201910461895.1A
Authority: CN
Inventors: 陈小硕; 刘明生; 刘建军; 陈进; 刘昌白
Original assignee: Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2021-10-15
Anticipated expiration: 2039-05-30
Also published as: CN110332217A

Abstract

A synchronous mechanism comprises a first folding plate, a second folding plate, a back cover, a gear carrier fixed on the back cover, a fixed seat fixed on the first folding plate and the second folding plate, a slide block limited between the fixed seat and the folding plate and a gear set limited on the gear carrier, a pair of fixing seats are respectively fixed on the first folding plate and the second folding plate, the sliding block is limited between the pair of fixing seats, the fixed seat comprises a seat base fixed on the first or second folding plate, a limiting part arranged on one side surface of the seat base and a limiting groove positioned on the side surface of the seat base and below the limiting part, the sliding block comprises a sliding block main body, a limiting block which is formed by extending from the bottom surface of the sliding block main body to the transverse outer side and is limited in the limiting groove, and damping blocks which are arranged on two transverse side surfaces of the sliding block main body, wherein at least two grooves are formed in the side surface of the limiting part; the application also provides a folding display device and communication equipment.

Description

Synchronizing mechanism, folding display device and communication equipment

Technical Field

The present invention relates to the field of communications electronics, and more particularly, to a synchronization mechanism, a foldable display device and a communication apparatus.

Background

With the development of the folding screen technology, the folding screen mobile phone has become a hot spot technology. Although the folding screen can be bent, the 180-degree bending cannot be realized, and the bent part still needs to keep a certain R angle, otherwise the screen can be damaged. The existing folding mode is divided into inward folding and outward folding, namely the screen is positioned at the inner side or the outer side after being folded, for example, Mate X issued by Huawei is outward folding, but the outward folding has the problems that the screen is in an exposed state and is easily scratched by a hard object, and the folding screen is fragile.

No matter the folding screen is folded outwards or inwards, the problem to be solved is how to ensure that when the folding screen is bent, the bending mechanism is adapted to the R-angle radian required by the bending part of the screen, at the moment, the inner side of the bending part of the folding screen can shorten the slight distance, while the outer side of the folding screen can lengthen the slight distance, at the moment, the parts tightly attached to the folding screen must keep synchronous change, otherwise, the screen can be damaged by extrusion. And guarantee that there is support in the folding screen back, otherwise unsettled screen can cause the damage when the finger is pressed.

Disclosure of Invention

In view of the above, it is desirable to provide a synchronization mechanism, a foldable display device and a communication apparatus, wherein the synchronization mechanism enables two folding surfaces of the foldable display device to be folded at a relatively uniform speed to protect a relatively fragile folding screen.

In order to solve the above technical problem, the present application provides a synchronization mechanism, which includes a first folding plate, a second folding plate, a back cover, a gear carrier fixed on the back cover, fixing seats fixed on the first folding plate and the second folding plate, a sliding block limited between the fixing seats and the folding plates, and a gear set limited on the gear carrier, wherein a pair of fixing seats are respectively fixed on the first folding plate and the second folding plate, the sliding block is limited between the pair of fixing seats, the gear set includes two first gear sets rotatably hinged with the sliding blocks on the first folding plate and the second folding plate, the two first gear sets are fixed on the back cover along with the gear carrier, the fixing seats include a seat base fixed on the first folding plate or the second folding plate, a limiting portion arranged on one side surface of the seat base, and a limiting groove located on the side surface of the seat base and below the limiting portion, the slider comprises a slider main body, a limiting block which is formed by extending the bottom surface of the slider main body to the transverse outer side and is limited in the limiting groove, and a damping block which is arranged on two transverse side surfaces of the slider main body, wherein the side surfaces of the limiting part are provided with at least two grooves, and the damping block and the grooves are matched to correspond to the positions in two states of unfolding and closing respectively.

Preferably, the slider main body transversely penetrates through the mounting hole to form mounting holes, the damping blocks are mounted at two opening ends of the mounting hole, and a spring is arranged between the two damping blocks in the mounting hole of each slider to provide elastic force for the damping blocks.

Preferably, the slider main body is provided with mounting holes on both lateral sides, the damping blocks are mounted in the mounting holes, and each damping block is provided with a spring in the mounting hole to provide elastic force for the damping block

Preferably, the gear set at least comprises two first gear assemblies which are meshed with each other, each first gear assembly comprises a first gear, a hinged end which extends from the first gear and is rotatably hinged with the sliding block, and a rotating shaft which is limited in the gear carrier, the hinged ends of the two first gear assemblies are respectively hinged with the sliding blocks on the first folding plate and the second folding plate, and when the first folding plate and the second folding plate are actuated, the first gears of the two first gear assemblies are meshed with each other to rotate, so that the rotating speeds of the first folding plate and the second folding plate are controlled to be consistent.

Preferably, the gear assembly further comprises two second gear assemblies which are meshed with each other and are positioned between the two first gear assemblies, each second gear assembly comprises two second gears which are meshed with each other and are positioned between the two first gears, and the two second gears are respectively meshed with the adjacent first gears.

Preferably, the gear rack comprises two gear racks, each gear rack comprises a main body part fixed on the back cover, two first shaft holes and two second shaft holes which sequentially and transversely penetrate through the main body part in the length direction of the main body part, and a first rotating shaft and a second rotating shaft which are fixed with the first gear and the second gear penetrate through a pair of corresponding first shaft holes and a pair of corresponding second shaft holes on the two gear racks.

Preferably, the two lateral ends of the main body of the gear rack protrude upwards to form protruding parts, the first shaft hole is formed in the protruding parts, the second shaft hole is formed in the main body, the first shaft hole and the second shaft hole are not on the same horizontal plane, and the second shaft hole is closer to the back cover.

Preferably, the gear rack further includes a protection portion extending from an inner side of the main body portion, the protection portion includes a first protection portion located below the second shaft hole and a second protection portion located below the first shaft hole, and the first protection portion and the second protection portion of each gear rack respectively protect one first gear and one second gear.

In order to solve the technical problem, the application provides a folding display device, including aforementioned lazytongs, paste adorn in the folded sheet deviates from folding screen and folding path control mechanism of back of the body lid one side.

In order to solve the above technical problem, the present application provides a communication device, including the foregoing synchronization mechanism.

The synchronous mechanism controls the first folding plate and the second folding plate to fold at the same speed, namely, the running speeds of the first folding plate and the second folding plate are synchronized. Therefore, the accurate folding and unfolding operation of the folding display device is realized, and the mechanism damage caused by different running states of the first folding plate and the second folding plate is avoided. Meanwhile, the damping block is arranged on the synchronizing mechanism, and the two states of the damping block are kept by matching with the groove.

Drawings

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

FIG. 1 is a perspective view of a foldable display device according to the present application;

FIG. 2 is a perspective view of a foldable display device according to the present application;

FIG. 3 is a perspective view of the foldable display device with the rear cover removed and a partially enlarged view thereof;

FIG. 4 is a perspective view of a rear cover of the foldable display device of the present application;

FIG. 5 is a perspective view of the folding path control mechanism of the present application;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a perspective view of a support base of the folding path control mechanism of the present application;

fig. 8 is a perspective view of the sliding seat of the folding path control mechanism of the present application;

FIG. 9 is a perspective view of the synchronization mechanism of the present application;

fig. 10 is a perspective view of a limit seat body of the synchronization mechanism of the present application;

FIG. 11 is a partially exploded perspective view of the synchronization mechanism of the present application;

fig. 12 is a perspective view of a fixed base of the synchronization mechanism of the present application;

fig. 13 is a perspective view of the folding display device of the present application in a closed state and a partially enlarged view thereof.

Detailed Description

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

Referring to fig. 1 to 3, the foldable display device of the present application includes a foldable plate 10, a back cover 20, a folding path control mechanism 40 and

synchronization mechanisms

50 and 60 respectively fixed between the foldable plate 10 and the back cover 20. The side of the folding plate 10 facing away from the back cover 20 is attached with a folding screen (not shown).

The folding plate 10 includes a first folding plate 11 and a second folding plate 12 which is matched with the first folding plate 11. The first and

second folding plates

11, 12 respectively include a notch (not numbered) and a

protruding piece

112, 122, and a plurality of

fixing holes

111, 121 are disposed at the transverse position of the

protruding piece

112, 122. The tab 112 of the first folding panel 11 fits into the notch of the second folding panel 12, and the tab 122 of the second folding panel 12 fits into the notch of the first folding panel 11.

As shown in fig. 4, the back cover 20 includes a back cover housing 21, a back cover cavity 22 opened in the back cover housing 21, and a fixing structure 23 disposed at the bottom of the back cover cavity 22. The back cover cavity 22 is in a circular arc structure.

As shown in fig. 5 to 8, the folding path control mechanism 40 includes a base 30, a sliding base 41 capable of rotating on the base 30, a rotating shaft 42 penetrating through the base 30, and gears 43 disposed at two ends of the rotating shaft 42 and respectively driving the sliding base 41.

The holder body 30 includes a fixed base 31 fixed in the back cover cavity 22, a pair of first arc-shaped grooves 32 opened on the surface of the fixed base 31 in a transverse first direction, a pair of second arc-shaped grooves 35 opened on the surface of the fixed base 31 in a second direction opposite to the first direction, a first partition wall 33 located between the pair of first arc-shaped grooves 32, and a second partition wall 36 located between the pair of second arc-shaped grooves 35. The intrados of the first and second

arcuate slots

32, 35 simulate the folding trajectory that the folded display device should maintain when folded or unfolded. The pair of first arc-shaped grooves 32 are formed at both lateral ends thereof with a closed end 321 and an open end 322, respectively, and the pair of second arc-shaped grooves 35 are formed at both lateral ends thereof with a closed end 351 and an open end 352, respectively. The closed end 321 and the open end 322 of the first arc-shaped slot 32 are located on the same side as the open end 352 and the closed end 351 of the second arc-shaped slot 35, respectively. The first and

second partition walls

33, 36 are formed with first and

second shaft holes

34, 37 at one ends of the

open ends

322, 352.

The back cover 20 is formed by CNC machining of an aluminum alloy material, and the seat body 30 is made of a stainless steel material through a powder metallurgy process.

In a specific implementation, the seat 30 may be integrated with the back cover 20 and made of the same material, for example, preferably, the material is not modified. However, when stainless steel is used as the appearance material, the surface treatment is not good, so the scheme of the application adopts a split design for the back cover 20 and the seat body 30. The present application encompasses a unitary design.

The sliding seat 41 includes a base portion 412 fixed to the first or

second folding plate

11, 12, an arc convex surface 411 matched with the arc surface of the first or

second arc groove

32, 35, a meshing space 413 provided on a side surface of the sliding seat 41, a plurality of tooth structures 414 provided on one side of the arc convex surface 411 and an arc convex hull 415 provided on one side of the base portion 412 and located in the meshing space 413. The arc convex hull 415 is concentric with the arc convex surface 411.

In the specific implementation, one of the two pairs of sliding seats 41 is mounted in the first arc-shaped slot 32, and the other pair is mounted in the second arc-shaped slot 35. The base portion 412 of the sliding seat 41 is fixed to the

protruding pieces

112, 122 of the first or

second folding plates

11, 12, that is, the sliding seat 41 fixed to the first folding plate 11 extends to the protruding piece 112 at the notch of the second folding plate 12; the sliding seat 41 fixed to the second folding plate 12 extends to the protruding piece 122 at the notch of the first folding plate 11.

During assembly, the two rotating shafts 42 are respectively inserted into the

shaft holes

34, 37 of the first and second separating

walls

33, 36. The gears 43 fixed at both ends of the rotating shaft 42 are respectively engaged with the engaging spaces 413 of the two sliding seats 41 at both sides of the first or

second partition walls

33, 36 and engaged with the tooth structures 414.

When the first and

second folding plates

11, 12 are folded or unfolded, the sliding seat 41 is driven to rotate around the first and second arc-shaped

grooves

32, 35, and simultaneously, the two gears 43 at the two ends of the rotating shaft 42 are respectively engaged with the tooth structure 414 in the engaging space 413 to rotate, and the seat body 30 is respectively provided with two pairs of sliding seats 41 fixed on the first and

second folding plates

11, 12 at the two transverse sides, and the two pairs of sliding seats 41 are completely consistent and symmetrical with respect to the rotation of the first and second arc-shaped

grooves

32, 35, so that the two sides of the first and

second folding plates

11, 12 can keep consistent rotation tracks when rotating, and can be folded according to the radian required by the folding screen, thereby avoiding damaging the folding screen.

The folding path control mechanism 40 of the present application is respectively provided with the first and second arc-shaped

grooves

32, 35 corresponding to the first and

second folding plates

10, 12 through the opposite two sides of the base 30, and then the first and second arc-shaped

grooves

32, 35 are assembled with the arc-shaped convex surface 411 and respectively fixed with the first and

second folding plates

11, 12, and two pairs of sliding seats 41 are arranged in the first and second arc-shaped

grooves

32, 35 and the arc-shaped convex surface 411, so that the folding plates 10 rotate according to a given track, thereby avoiding damaging the folding screen.

As shown in fig. 3 and fig. 9 to fig. 12, the synchronizing mechanism includes a gear rack 50, a fixing base 61 fixed on the folding plate 10, a sliding block 62 limited between the fixing base 61 and the folding plate 10, damping blocks 63 installed on two lateral sides of the sliding block 62, and gear sets 64 and 65 fixed on the gear rack 50.

The fixing base 61 includes a base 611 fixed on the first or

second folding plate

11, 12, a limiting portion 613 disposed on one side of the base 611, and a limiting groove 612 disposed on the side of the base 611 and below the limiting portion 613. The outer side surface of the limiting portion 613 is provided with a plurality of grooves 614.

The gear rack 50 is a pair of gear racks, each gear rack 50 includes a main body 51, a fixing lug 52 formed by extending from the longitudinal outer side of the main body 51, an arc surface 53 formed at the top end of the main body 51 and matching with the arc cavity of the back cover cavity 22, a protruding part 54 formed by protruding from the two transverse ends of the main body 51, a protecting part 56 formed by extending from the longitudinal inner side of the main body 51, a pair of second shaft holes 55 formed by penetrating through the main body 51 in the longitudinal direction, and a pair of first shaft holes 541 formed by penetrating through the protruding part 54 in the longitudinal direction. The protrusion 54 may be a part of the body 51, and the second shaft hole 55 may not be in the same horizontal plane as the first shaft hole 541. The protection portion 56 includes a first protection portion 561 located below the second shaft hole 55 and a second protection portion 562 located below the first shaft hole 541, and the protection portion 562 corresponds to only one second shaft hole 55 and one first shaft hole 541.

The slider 62 includes a slider main body 621, a stopper 622 formed to extend laterally outward from a bottom surface of the slider main body 621, a mounting hole 623 formed in a lateral outer surface of the slider main body 621, and a hinge 624 formed in a side of the slider main body 631 facing the

gear assemblies

64 and 65.

The damping block 63 is installed in the installation hole 623, the damping block 63 includes an insertion portion 631 installed in the installation hole 623 and a damping portion 632 formed by protruding from the lateral outer side of the insertion portion 631, the installation hole 623 penetrates in the lateral direction, one damping block 63 is installed on each lateral outer side of the installation hole 623, and an elastic member (not shown) such as a spring is disposed between the two damping blocks 63, so that an elastic force is provided between the two damping blocks 63. The limit block 622 of the slide block 62 is limited in the limit groove 612 of the fixing base 61, i.e. is pressed and held in the limit groove 612 by the limit portion 613. The damping block 63 is matched with a groove 614 on the outer side surface of the limiting part 613 of the fixed seat 61 to provide an interference force when the sliding block 62 moves.

The gear assembly includes two first gear assemblies 64 respectively hinged to the hinge portions 624 of the sliders 62, and two second gear assembly 65 positioned between the two first gear assemblies 64. The first gear assembly 64 includes a first gear 642, a hinge end 643 extending from the outside of the first gear 642 and hinged to the hinge 624 via a rotation shaft, and a rotation shaft 641 fixed to the first gear 642 and having two ends rotatably fixed to the first shaft holes 541 of the pair of fixing seats 61. The second gear assembly 65 includes a second gear 652 engaged with the first gear 642, and a second rotating shaft 651 fixed to the second gear 652 and having both ends rotatably fixed to the second shaft hole 55. The first and

second gears

642, 652 of the gear assembly include at least four first gears 642 hinged to the hinge portion 624 of the slider 61, a second gear 652 engaged with the first gear 642, another second gear 652 engaged with the second gear 652, and another first gear 642 engaged with another second gear 652 and hinged to the hinge portion 624 of the slider 61 on the other side.

The four gears are arranged, so that the radius of each gear can be reduced and the thickness of the synchronous mechanism can be reduced under the condition that the synchronous mechanism is wider. Of course, the gear assembly can be provided in six or eight to further reduce the thickness of the synchronizing mechanism.

The gear rack 50 is fixed in the back cover cavity 22 of the back cover 20 through the fixing lugs 52, the fixing seat 61 is fixed on the folding plate 10, and the sliding block 62 is limited in the fixing seat 61 and can slide in the limiting groove 612 of the fixing seat 61. The gear assembly is fixed on the back cover 20 along with the gear rack 50 and is hinged with the sliding block 62 in a rotating mode. When the first and

second folding plates

11, 12 are folded or unfolded, the first gear assembly 64 is driven to rotate, the second gear assembly 65 is matched with the first gear assembly 64 to rotate, during the rotation process, the sliding block 62 slides relative to the fixed seat 61, the damping part 632 of the damping block 63 enters the second groove 614 from the first groove 614 on the limiting part 613, and a strong retaining force is generated when the folding plate 10 starts to operate and finishes operating.

With continued reference to fig. 13, when the foldable display device is in the folded state, the two pairs of sliding bases 41 of the folding path control mechanism 40 slide out of the first and second arc-shaped

slots

32, 35 in opposite directions until the gear 43 is engaged with the second end along the engaging space 413 of the sliding bases 41 from the first end. The folding path control mechanism 40 controls the folding trajectory of the first and

second folding plates

11, 12 to conform to the folding performance of the folding screen by the first and second arc-shaped

slots

32, 35 cooperating with the arc-shaped convex surface 411 of the sliding seat 41. The

synchronization mechanism

50, 60 controls the first and

second folding plates

11, 12 to fold at the same speed, i.e. synchronizes the running speed of the first and

second folding plates

11, 12. Therefore, the accurate folding and unfolding operation of the folding display device is realized, and the mechanism damage caused by different running states of the first folding plate 11 and the second folding plate 12 can not be generated.

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

Claims

1. A synchronous mechanism is characterized by comprising a first folding plate, a second folding plate, a back cover, a gear carrier fixed on the back cover, fixing seats fixed on the first folding plate and the second folding plate, a sliding block limited between the fixing seats and the folding plates, and gear sets limited on the gear carrier, wherein a pair of fixing seats are respectively fixed on the first folding plate and the second folding plate, the sliding block is limited between the pair of fixing seats, each gear set comprises two first gear sets which are respectively and rotationally hinged with the sliding blocks on the first folding plate and the second folding plate, the two first gear sets are fixed on the back cover along with the gear carrier, each fixing seat comprises a seat base fixed on the first folding plate or the second folding plate, a limiting part arranged on one side surface of the seat base and a limiting groove positioned on the side surface of the seat base and below the limiting part, and each sliding block comprises a sliding block main body, The limiting block is formed by extending the bottom surface of the sliding block main body to the transverse outer side and is limited in the limiting groove, and the damping block is arranged on the two transverse side surfaces of the sliding block main body, at least two grooves are formed in the side surfaces of the limiting part, and the damping block and the grooves are matched to correspond to the positions in two states of unfolding and closing respectively.

2. The synchronizing mechanism according to claim 1, wherein the slider body is formed with a mounting hole extending therethrough in a transverse direction, the damping blocks are mounted to both open ends of the mounting hole, and a spring is provided between the two damping blocks in the mounting hole of each slider to provide an elastic force to the damping blocks.

3. The synchronizing mechanism according to claim 1, wherein the slider body is provided with mounting holes at both lateral sides thereof, the damping blocks are mounted in the mounting holes, and each damping block is provided with a spring in the mounting hole to provide an elastic force to the damping block.

4. The synchronizing mechanism according to claim 1, wherein the gear set comprises at least two first gear assemblies engaged with each other, each first gear assembly comprises a first gear, a hinged end extending from the first gear and hinged to the slide block, and a rotating shaft retained in the gear carrier, the hinged ends of the two first gear assemblies are hinged to the slide blocks of the first and second folding plates, respectively, and when the first and second folding plates are actuated, the first gears of the two first gear assemblies are engaged with each other to rotate, so as to control the rotating speeds of the first and second folding plates to be consistent.

5. The synchronizing mechanism according to claim 4, wherein the gear assembly further comprises two second gear assemblies meshing with each other and positioned between two first gear assemblies, the second gear assemblies comprising two second gears meshing with each other and positioned between the first gears, the two second gears meshing with adjacent first gears, respectively.

6. The synchronizing mechanism according to claim 5, wherein the number of the gear racks is two, each gear rack includes a main body fixed to the back cover, two first shaft holes and two second shaft holes sequentially and transversely formed through the main body in a length direction of the main body, and a first rotating shaft and a second rotating shaft fixed with the first gear and the second gear are respectively inserted through a pair of the first shaft holes and a pair of the second shaft holes of the two gear racks.

7. The synchronizing mechanism according to claim 6, wherein the carrier main body has a protruding portion protruding upward from both lateral ends thereof, the first shaft hole is provided in the protruding portion, the second shaft hole is provided in the main body, the first shaft hole and the second shaft hole are not in the same horizontal plane, and the second shaft hole is closer to the back cover.

8. The synchromesh mechanism according to claim 7, wherein said carriers further comprise guard portions extending from an inner side of said main body portion, said guard portions including a first guard portion located below said second shaft hole and a second guard portion located below said first shaft hole, said first guard portion and said second guard portion of each carrier respectively protecting a first gear and a second gear.

9. A foldable display device comprising a synchronization mechanism according to any one of claims 1 to 8, a foldable screen attached to a side of said first and second foldable plates facing away from said back cover, and a folding path control mechanism.

10. A communication device comprising a synchronization mechanism according to any of claims 1-8.