CN109654113B

CN109654113B - Rotating shaft module of folding device

Info

Publication number: CN109654113B
Application number: CN201811631572.4A
Authority: CN
Inventors: 许有村
Original assignee: 兆利科技工业股份有限公司
Filing date: 2018-12-29
Publication date: 2020-06-23

Abstract

One end face of a rotating shaft module of the folding device is in contact with the flexible display, and the other end face of the rotating shaft module is connected with the first shell and the second shell; the first connecting rod and the linkage plate of the first sliding mechanism of the rotating shaft module are respectively pivoted with a first pivoting part and a second pivoting part of a base, the limiting part at one end of a supporting plate body is limited on the first stopping part of the base, and the second connecting part at the other end of the supporting plate body is connected with the first connecting part of a first sliding block in a relatively arc-shaped swinging mode; the first sliding part of the moving part at one end of the linkage plate is connected with the third sliding part at one end of the middle driving part, and the fourth sliding part at the other end of the middle driving part is positioned on the second sliding part on the linkage part in a sliding manner, so that the linkage part and the linkage plate move in the opposite direction, and the support plate body is deflected to accommodate the bent part of the flexible display.

Description

Rotating shaft module of folding device

Technical Field

The present invention relates to a hinge, and more particularly to a hinge module of a foldable electronic device.

Background

A conventional foldable electronic device, such as the foldable display device of the patent publication No. CN 105788452A of the people's republic of china, shows a foldable structure of a hinge, which mainly includes a first body and a third body of a hinge connected to a first supporting member and a second supporting member respectively, and a flexible display module combined with the first supporting member and the second supporting member, so that the flexible display modules on the first supporting member and the second supporting member are folded together after the first body and the third body rotate relative to the second body. It can let first main part, third main part pivoted structure owing to set up in the second main part, consequently can't effectively reduce the interval that can leave for the pivot holding between two organisms, and this kind of design will make holistic volume grow, not only is unfavorable for electronic device's global design, and does not accord with the market demand that whole volume tends to light, thin gradually.

As shown in three patents CN103576775A, CN106205385A and US9250733B, two bodies are relatively opened and closed by a dual-axis rotating shaft or a structure similar to dual-axis; in the supporting structures of these three patents, one end of the supporting structure is pivoted through a solid shaft, and the other end of the supporting structure is movable, when the entire folding device is closed, each supporting structure in the two bodies is subjected to another force application member, for example: the spring, the tension spring, the magnet and the torsion spring are driven to give a containing space inside for containing the bent middle part of the flexible display, and the flat middle part of the flexible display is respectively supported by each supporting structure when the whole folding device is unfolded. For another example, two patents of the folding device of the invention published in the people's republic of china No. CN106255935A and the display system of the invention published in the No. CN103034293B are respectively formed by one or two first connecting rods as the first connecting rods to push the support structure pivoted by the physical shaft to generate displacement, so as to achieve the effect of reducing the distance to accommodate the bending part of the flexible display. The design concept of the mechanism capable of compensating the folding path is also shown in US9791892B and US10001810B, wherein US9791892B can be regarded as an extension of CN106255935A shown in fig. 16a to 16c, and US10001810B is a mechanism provided with a folding path compensation mechanism in one of its bodies (220 of fig. 2 and 920 of fig. 9 of US 10001810B), and includes a translation plate (225 of fig. 2 and 921 of fig. 9 of US 10001810B), a first link (330 of fig. 2 and 920 of fig. 9 of US 10001810B) or a gear assembly (340 of fig. 10a of US 10001810B) with a guide (331 of fig. 9 and 341 of fig. 10a of US 10001810B) to achieve the effect of compensating the folding path difference.

Disclosure of Invention

The connection relationship and structure of the components of the mechanism for compensating the folding path used in the above patents are quite complex, and most of the mechanisms utilize a direct pivot structure, which is not ideal in terms of transmission stability, and the supporting structure thereof is displaced so that in the process of reducing the distance to accommodate the bending portion of the flexible display, since the relative movement is performed at the same or too slow speed, the space for accommodating the bending portion of the flexible display cannot be quickly formed due to the unsmooth force path of the folding action or the insufficient displacement speed of the supporting structure, thereby causing a pulling or pushing phenomenon to the flexible display, and causing the middle bending portion of the flexible display to wrinkle or peel. Accordingly, the present invention has been made in an effort to provide a structure different from the prior art and to overcome the above-mentioned shortcomings, and the inventors have made many years of experience and continuous research and development improvements.

An object of the present invention is to provide a hinge module, which can effectively thin the whole of a mechanism capable of compensating a folding path and simplify parts used therein to reduce the production cost by the connection relationship and structural characteristics of a first connecting rod, a first slider, a supporting plate body, a linkage plate, a linkage member, and an intermediate transmission member having a cam-connecting-rod structure in the whole folding process. When the whole body is bent and flattened, the second connecting part of the supporting plate body swings in an arc manner relative to the first connecting part of the first sliding block, so that a free swing effect similar to a shaftless seesaw can be generated, and the transmission stability is maintained. The flexible display device does not need to be pivoted by a solid shaft as in the prior art, and when the flexible display device is integrally bent, an accommodating space can be made to accommodate the bent middle part of the flexible display device, and when the flexible display device is integrally unfolded and flat, the flat middle part of the flexible display device can be stably supported.

The present invention provides a rotating shaft module, which utilizes an intermediate transmission member having a third sliding portion at one end to link a linkage plate to move relatively, and utilizes a fourth sliding portion at the other end of the intermediate transmission member to link the linkage member to move in a direction opposite to the linkage plate, so that a fixed shell connected with the linkage plate and a movable shell connected with the linkage member can respectively form compensation movement with a first-speed effect and a second-speed effect in a folding process, thereby achieving the effect of compensating a folding path difference, quickly forming a space capable of accommodating a bending portion of a flexible display, and avoiding the flexible display from being dragged or pushed by a folding action force path, thereby prolonging the service life of the flexible display.

In order to achieve the above object, one end face of the rotating shaft module of the folding device provided by the present invention simultaneously contacts a flexible display to bend the flexible display relatively, and the other end face of the rotating shaft module is respectively connected with the first shell and the second shell for linking the first shell and the second shell to turn the first shell and the second shell relatively; the first shell comprises a fixed shell and a movable shell which can stretch relative to the fixed shell; the rotating shaft module comprises a base and a first sliding mechanism, wherein one end of the base is provided with a first pivoting part, a second pivoting part and a first stopping part; the first sliding mechanism comprises a first connecting rod, a first sliding block, a supporting plate body, a connecting plate, a connecting piece and an intermediate transmission piece. Wherein, the first connecting rod is connected with the fixed shell, and one end of the first connecting rod is pivoted with the first pivoting part; the first sliding block is connected with the movable shell, the first sliding block is connected to one side of the first connecting rod in a relatively sliding mode, and the first sliding block is provided with a first connecting part; one end of the supporting plate body is provided with a limiting part for limiting on the first stopping part, one side of the supporting plate body is provided with a second connecting part, and the second connecting part is connected with the first connecting part and used for enabling the supporting plate body to swing in an arc shape relative to the first sliding block; one end of the linkage plate is pivoted with the second pivoting part, the other end of the linkage plate is provided with a moving piece, the moving piece is provided with a first sliding part, and the moving piece is limited on the fixed shell in a relatively movable mode; the linkage piece is connected with the movable shell and is provided with a second sliding part; the middle transmission part is provided with a fulcrum for being pivoted and positioned on the fixed shell, one end of the middle transmission part is provided with a third sliding part for sliding relative to the first sliding part to drive the linkage plate to move, and the other end of the middle transmission part is provided with a fourth sliding part for sliding relative to the second sliding part to drive the linkage part, so that the linkage part moves in the direction opposite to the direction of the linkage plate.

In practice, the first stop portion is a stepped surface formed at one end of the base for limiting the support plate to deviate by an angle.

When the first connecting rod is operated, one end of the first connecting rod is pivoted with the first pivoting part through a first pivot, the end adjacent to the first connecting rod is provided with a first guide surface, and the first guide surface is formed by downwards inclining and extending in the direction far away from the end.

When the device is implemented, the device also comprises a first supporting surface, the first supporting surface is adjacent to the first guide surface and forms an included angle with the first guide surface, and the limiting part of the deflected supporting plate body is abutted against and supported by the first supporting surface.

When the device is implemented, one end of the first sliding block is provided with an inclined surface, and the first connecting part is an arc-shaped guide groove which is formed on one side of the first sliding block and is inwards sunken from the inclined surface; the second connecting portion includes an arc portion and one and resets the piece, and arc portion is formed in one side of the supporting plate body, and arc portion and first slider are connected respectively to the both ends that reset the piece, supply arc portion to hold in the arc guide slot with the gliding mode of arc relatively.

When the support plate is implemented, the support plate body comprises a support plate and a connecting plate, one end of the connecting plate is connected with the support plate, and the other end of the connecting plate is provided with an arc-shaped part of the second connecting part.

When the linkage plate is implemented, the linkage plate comprises a first linkage plate and a second linkage plate which are connected in an up-down laminated mode, a first shaft is arranged at one end of the first linkage plate, a second shaft is arranged at one end of the second linkage plate, and the first shaft and the second shaft are respectively pivoted with the second pivoting portion.

When the device is implemented, the other end of the linkage plate is pivoted with one end of the moving piece.

When the movable part is used, the fixed shell is provided with a long guide groove, the bottom surface of the movable part is provided with a guide pillar, and the guide pillar penetrates into the long guide groove to limit the movable part on the fixed shell in a relative movable mode.

When the sliding device is implemented, the first sliding part is an upward convex cylinder on the top surface of the moving part, the third sliding part is a long groove formed at one end of the intermediate transmission part, and the upward convex cylinder is accommodated in the long groove.

When the linkage component is implemented, the second sliding part is a long guide groove formed on the top surface of the linkage component, the fourth sliding part is a lower convex cylinder at the other end of the middle transmission component, and the lower convex cylinder is accommodated in the long guide groove.

When the linkage piece is implemented, the linkage piece further comprises a V-shaped groove, the V-shaped groove is formed in the top surface of the linkage piece, and the second sliding portion is located in the V-shaped groove.

When the device is implemented, the device also comprises a second connecting rod, the second connecting rod is connected with the fixed shell, a second pivot is pivoted with the first pivoting part at one end of the base, and one end of the second connecting rod is fixedly connected with the second pivot, so that the second pivot, the second connecting rod and the fixed shell rotate synchronously.

In practice, the end adjacent to the second connecting rod is provided with a second guide surface which is formed by extending downwards in a direction away from the end.

When the device is implemented, the device also comprises a second supporting surface and a second guiding surface, wherein the second supporting surface is adjacent to the second guiding surface and forms an included angle with the second guiding surface, and the limiting part of the deflected supporting plate body is abutted against and supported by the limiting part.

When the rotating shaft module is implemented, the other end of the base is also provided with a third pivoting part, a fourth pivoting part and a second stopping part, the rotating shaft module also comprises a second sliding mechanism, and the second sliding mechanism and the first sliding mechanism have corresponding structures and are symmetrically arranged at the two ends of the base

For further understanding of the present invention, the following detailed description of the preferred embodiments will be provided in conjunction with the drawings and figures to illustrate the specific components of the present invention and the functions performed thereby.

Drawings

Fig. 1 is a schematic perspective view illustrating a hinge module according to a preferred embodiment of the invention when the hinge module is connected to a first housing and a second housing.

Fig. 2 is a partially exploded view of the first and second sliding mechanisms of the spindle module according to the preferred embodiment of the present invention.

Fig. 3 is a partial exploded view of the first sliding mechanism of the spindle module according to the preferred embodiment of the present invention.

FIG. 4 is a top view of a hinge module according to a preferred embodiment of the present invention.

Fig. 5 is a sectional view taken along line a-a' of fig. 4.

Fig. 6 is a sectional view of B-B' of fig. 4.

Fig. 7 is a cross-sectional view of the invention of fig. 5 after bending.

Fig. 8 is a cross-sectional view of the invention of fig. 6 after bending.

Fig. 9 is a schematic perspective view of a hinge module according to a preferred embodiment of the invention after being bent.

Fig. 10 is a schematic view of the first and second housings in the use state when the first sliding portion and the linking member move in parallel in opposite directions at the beginning stage of the relative turning and closing operation.

Fig. 11 is a schematic view of a usage state of the first sliding portion and the linking member moving in parallel in opposite directions during a continuous stage of the relative turning and closing motion of the first housing and the second housing.

Description of the reference numerals

First shell 11 of rotating shaft module 1 of folding device

Fixed housings 111, 121 and movable housings 112, 122

Frame 113, 123 plate 114, 124

Second housing 12 flexible display 13

Base 2 of accommodating space 14

First pivot portion 21 and second pivot portion 22

First stop 23 and third pivot 24

Fourth pivot portion 25 and second blocking portion 26

First gear 27 and second gear 28

Intermediate gear 29 first sliding mechanism 3

Second sliding mechanism 3' first connecting rod 31

First pivot 311 first guide surface 312

Upper rail 313 first support surface 314

Lower rail 321 of first slider 32

Inclined plane 322 first connecting part 323

Long receiving groove 324 supporting plate 33

Supporting plate 331 connecting plate 332

Limiting part 333 arc part 334

Second connecting part 336 of resetting piece 335

Lug 337 linkage plate 34

The first linkage piece 341 and the second linkage piece 342

First shaft 343 and second shaft 344

Moving part 345 guide post 346

The long guide groove 347 is a first sliding portion 348

Linkage 35 with limiting grooves 349

V-shaped slot 351 second sliding part 352

Fulcrum 361 of intermediate transmission member 36

Third slider 362 and fourth slider 363

Stop surface 364 second link 37

Second pivot 371 second guide surface 372

A second support surface 373.

Detailed Description

Referring to fig. 1, an end surface of a rotating shaft module 1 of the folding device of the present invention contacts two halves of a flexible display 13 at the same time, and the other end surface of the rotating shaft module 1 is connected to a first housing 11 and a second housing 12 respectively for linking the first housing 11 and the second housing 12, so that the first housing 11 and the second housing 12 are turned over relatively, thereby enabling the flexible display 13 to bend or flatten relatively, and when the whole body is bent, as shown in fig. 7, an accommodating space 14 is provided at a joint position of the first housing 11 and the second housing 12 to accommodate a middle bending portion of the flexible display 13. In the present embodiment, the first housing 11 and the second housing 12 have the same structure, the first housing 11 and the second housing 12 respectively include a fixed housing 111, 121 and a movable housing 112, 122 respectively retractable with respect to the fixed housing 111, 121, each movable housing 112, 122 respectively includes an outer frame 113, 123 and a flat plate 114, 124 connected to the outer frame 113, 123, and the two flat plates 114, 124 are located on the bottom surface of the flexible display 13.

As shown in fig. 2 to 6, a hinge module 1 of a folding device according to a preferred embodiment of the present invention includes a base 2, a first sliding mechanism 3 and a second sliding mechanism 3', wherein the base 2 is located between a first housing 11 and a second housing 12, one end of the base 2 has a first pivot portion 21, a second pivot portion 22 and a first stop portion 23 on different axes, and the other end of the base 2 has a third pivot portion 24, a fourth pivot portion 25 and a second stop portion 26 opposite to the pivot portions and the first stop portion 23. The first stopper 23 and the second stopper 26 are stepped surfaces formed at both ends of the base 2, respectively. The first sliding mechanism 3 and the second sliding mechanism 3 'are respectively pivoted to two ends of the base 2, so that the first sliding mechanism 3 and the second sliding mechanism 3' are symmetrically arranged. The base 2 has a first gear 27 and a second gear 28 therein, the first gear 27 is connected to the fixed housing 111 of the first housing 11, the second gear 28 is connected to the fixed housing 121 of the second housing 12, the first gear 27 engages with the second gear 28 through the intermediate gear 29, in practice, the first gear 27 and the second gear 28 can also mesh with each other, so that the second sliding mechanism 3' and the first sliding mechanism 3 can be turned over relatively. In the present embodiment, the first and second slippage mechanisms 3 and 3' have the same structure, and the following description will be made with the first slippage mechanism 3 taken as an example.

The first sliding mechanism 3 includes a first connecting rod 31, a first sliding block 32, a supporting plate 33, a linking plate 34, a linking member 35, an intermediate transmission member 36 and a second connecting rod 37. One end of the first link 31 is connected to the fixed housing 111, and the other end of the first link 31 has a first pivot 311 for pivotally connecting the first pivot portion 21, so that the first link 31 and the fixed housing 111 rotate synchronously; the end adjacent to the first connecting rod 31 has a first guiding surface 312, and the first guiding surface 312 is a plane formed by extending downwards in a direction away from the end; one side of the first link 31 has an upper rail 313 having a stepped shape. In addition, a first supporting surface 314 is adjacent to the first guiding surface 312 and forms an included angle with the first guiding surface 312, and the first supporting surface 314 extends in a direction away from one end of the first guiding surface 312 and is inclined upward to form a plane.

The first slider 32 is located at one side of the first link 31, and one side of the first slider 32 adjacent to the first link 31 has a stepped lower track 321, and the lower track 321 correspondingly overlaps the upper track 312, so that the first slider 32 can be connected to one side of the first link 31 in a relatively sliding manner. The first slider 32 is upwardly connected to the plate 114 of the movable housing 112, and one end of the first slider 32 has an inclined surface 322, and an arc-shaped guide groove is recessed from the inclined surface 322, and is formed at one side of the first slider 32, and the arc-shaped guide groove serves as a first connection portion 323. In addition, a receiving slot 324 is recessed in the bottom surface of the first slider 32 to communicate with an arc-shaped guiding slot serving as the first connecting portion 323.

The supporting plate 33 includes a supporting plate 331 and a connecting plate 332, the supporting plate 331 is a long plate, and one end of the supporting plate 331 extending horizontally serves as a limiting portion 333 for being lapped and limited on the first stop portion 23 of the base 2; one end of the connecting plate 332 is a plate for being screwed to the bottom surface of one side of the supporting plate 331, and in practice, the supporting plate 331 and the connecting plate 332 are not limited to be detachable structures, but can be combined with each other to form an integral structure, so as to omit the screwing process between the two plates; the other end of the connecting plate 332 has an arc portion 334, and the arc portion 334 is correspondingly accommodated in the first connecting portion 323 of the first sliding block 32, so as to allow the supporting plate 33 to swing in an arc shape relative to the first sliding block 32; the arc portion 334 extends downward to form a tab 337, and is guided into the long receiving slot 324 of the first slider 32; a restoring member 335 is an extension spring, one end of the extension spring is connected to the lug 337 of the arc portion 334, and the other end of the extension spring is connected to the bottom of the first slider 32, i.e. is fixedly connected to one side of the accommodating long slot 324 in a direction away from the lug 337, so that an effective moment can be formed in a limited space to pull the whole supporting plate 33, and the arc portion 334 and the restoring member 335 are combined to form a second connecting portion 336.

The linkage plate 34 includes a first linkage plate 341 and a second linkage plate 342 stacked and connected up and down, and is located in the limiting groove 349 provided by the fixed housing 111 for actuation and protection, and the linkage plate 34 can be actuated more stably through the stacked structure of the first linkage plate 341 and the second linkage plate 342. The first shaft 343 is disposed at one end of the first linking plate 341, the second shaft 344 is disposed at one end of the second linking plate 342, the first shaft 343 and the second shaft 344 at one end of the linking plate 34 are respectively pivoted to the second pivoting portion 22 of the base 2, the other end of the linking plate 34 is pivoted to a moving member 345, a guide pillar 346 is disposed at a bottom surface of the moving member 345, and the guide pillar 346 penetrates downward into the long guide slot 347 of the fixed housing 111, so that the moving member 345 is relatively movably retained on the fixed housing 111. In order to stabilize the sliding motion of the moving member 345 and reduce unnecessary frictional resistance or false torque, a long and a short protruding ribs parallel to each other are formed on the top surface of one end of the moving member 345, and an involute slot is formed on the top surface between the two ends of the moving member 345, the involute slot is gradually opened towards the moving member 345, and a convex cylinder is provided on the top surface of the moving member 345 and located in the involute slot on the top surface of the moving member 345 to serve as a first sliding portion 348.

The linking member 35 is a rectangular body, the linking member 35 and the first connecting rod 31 are parallel, the linking member 35 is connected to the flat plate 114 of the movable housing 112, the top surface of the linking member 35 has a V-shaped slot 351, a transverse long guide slot is provided in the V-shaped slot 351, the guide slot is used as the second sliding portion 352, and the V-shaped slot 351 is gradually opened towards the linking member 35 for the middle transmission member 36 to swing between the two slots. The bottom surface of the middle transmission member 36 has a downwardly protruding round bar pivotally connected to the fixed housing 111, the round bar serves as a swing fulcrum 361 of the middle transmission member 36, and at least one stopping surface 364 is disposed on the periphery of the round bar to form a stop with one side of the moving member 345, one end of the middle transmission member 36 has an elongated slot for receiving the first sliding portion 348 and for pushing and pressing each other, and the elongated slot serves as a third sliding portion 362; the other end of the middle transmission member 36 has a lower convex cylinder for being accommodated in the second sliding portion 352, the lower convex cylinder is a fourth sliding portion 363, the fourth sliding portion 363 is accommodated in the second sliding portion 352 in the V-shaped slot 351 of the linkage member 35 for being slidably positioned on the linkage member 35, and when the second sliding portion 352 and the fourth sliding portion 363 are pushed each other, the effect of elastic adjustment is also provided, so that the excessive acting force of one pair of sliding portions on the other pair of sliding portions can be alleviated, and the service life can be prolonged. In addition, one side of the other end of the intermediate transmission member 36 can be stopped at an inner wall of the V-shaped slot 351 (see fig. 10), and at least one stopping surface 364 of the swing fulcrum 361 and a stopping function at one side of the moving member 345 (see fig. 9) are further provided, so that the positioning effect can be enhanced and the intermediate transmission member 36 can be rotated to a preset angle in the relative turning opening and closing processes of the two shells, so as to prevent the flexible display 13 from being damaged due to over-rotation.

The second link 37 is a long rod, the second link 37 is parallel to the linking plate 34 and one side of the moving member 345, and the second link 37 has a first end and a second end opposite to each other. The first end of the second link 37 is connected to the fixed housing 111, the second end of the second link 37 is connected to a second pivot 371, and the second pivot 371 is pivotally connected to the first pivot 21 of the base 2, so that the second pivot 371, the second link 37 and the fixed housing 111 rotate synchronously. A second guide surface 372 is arranged at a position adjacent to the second end of the second connecting rod 37, and the second guide surface 372 is a plane formed by extending downwards in a direction away from the second end; a second supporting surface 373 is adjacent to the second guiding surface 372 and forms an included angle with the second guiding surface 372, and the second supporting surface 373 is a plane formed by extending upward and inclining in a direction away from one end of the second guiding surface 372. The second guide surface 372 and the second support surface 373 and the first guide surface 312 and the first support surface 314 of the first link 31 are disposed on two sides of the linkage plate 34 respectively.

Therefore, when the first housing 11 and the second housing 12 are turned and unfolded relatively to each other to be in a flat state, the limiting portion 333 at one end of the supporting plate 331 can be smoothly overlapped and limited on the first stopping portion 23 of the base 2 through the guidance of the first guiding surface 312 and the second guiding surface 372, so as to limit the actuation of the supporting plate 33, and the two supporting plates 331 support the flexible display 13 upwards. At this time, the restoring pieces 335 of the first and second glide mechanisms 3 and 3', respectively, are stretched to accumulate elastic force.

As shown in fig. 7 to 9, when the first housing 11 and the second housing 12 are turned over and closed relatively to each other to separate the two sets of fixed housings 111, 121 and the movable housings 112, 122 from each other, the limit portions 333 of the support plates 331 of the two sets of sliding mechanisms can be separated from the first blocking portion 23 and the second blocking portion 26 of the base 2 by the simultaneous operation of the first sliding mechanism 3 and the second sliding mechanism 3' and the elastic restoring action of the two restoring members 335, so that the two limit portions 333 are separated from the limits of the first blocking portion 23 and the second blocking portion 26 simultaneously, the two support plate bodies 33 can swing in an arc shape relative to the two first sliding blocks 32 respectively, the two support plates 331 can be shifted by an angle, the two connecting plates 332 can be pressed against the inclined surfaces 322 at one end of each first sliding block 32 respectively, and the support plates 331 can be pressed against the first support surfaces 314 and the second support surfaces 373 respectively, therefore, a plurality of contact surfaces are formed to share the load and to uniformly support, and the laminated structure of the linking plate 34 can be laid on the bottom surface of the limiting groove 349 to prevent the supporting plate 331 from interfering with the linking plate 34 when bearing. Since the two supporting plates 331 of the two sliding mechanisms are offset by an angle, an accommodating space 14 is formed to accommodate the middle bending portion of the flexible display 13.

Referring to fig. 7, 10 and 11, in the process of relatively turning over and closing the first housing 11 and the second housing 12, the third sliding portion 362 at one end of the intermediate transmission member 36 is coupled with the first sliding portion 348 of the moving member 345, and the fourth sliding portion 363 at the other end of the intermediate transmission member 36 is accommodated in the second sliding portion 352 of the V-shaped slot 351 of the coupling member 35. When the intermediate transmission member 36 rotates by a rotation angle θ to simultaneously link the moving member 345 and the linking member 35 and move in parallel in opposite directions, if the horizontal moving distance of the moving member 345 is set as S1 and the relative horizontal moving distance of the linking member 35 is set as S2, then the intermediate transmission member 36 rotates by the rotation angle θ to simultaneously link the moving member 345 and the linking member 35 and move in parallel in opposite directions

S1= r1 (distance from the axial center of the first sliding portion 348 to the fulcrum 361) × tan θ (rotation angle)

S2= r2 (distance from the axis of the fourth slider 363 to the fulcrum 361) × sin θ (rotation angle)

Thus, S1< S2

If the intermediate transmission member 36 continues to rotate by the same rotation angle theta after rotating by the rotation angle theta, and the relative horizontal movement distance of the linkage member 35 is set to be S3 during the rotation angle theta, S3 is less than S2; similarly, the horizontal moving distance of the moving member 345 is also greater than the distance of S1, and the technical features of the present invention will be described later.

Therefore, when the intermediate transmission element 36 rotates in situ at a constant speed around the fulcrum 361, the linked moving element 345 moves horizontally at a long and a short distance before and after the rotation to generate a first-speed and a second-speed movement, and the linked linking element 35 also moves in parallel at a first-speed and a second-speed in a reverse direction relative to the moving element 345. Therefore, at the beginning stage of the relative turning and closing operation of the first casing 11 and the second casing 12 (it can be considered that the intermediate transmission member 36 rotates by an angle θ degree first), the limiting portion 333 of the supporting plate 331 and the first stopping portion 23 of the base 2 can be quickly separated, so that the two supporting plates 331 are relatively deviated by an angle to gradually form the accommodating space 14 capable of accommodating the middle bending portion of the flexible display 13, and the middle bending portion of the flexible display 13 in the process can synchronously move in the direction away from the base 2. In the continuous phase of the relative turning and closing motion of the first housing 11 and the second housing 12 (it can be regarded that the intermediate transmission member 36 rotates by the same rotation angle θ again), since the moving distance of the moving member 345 and the linking member 35 is reduced at the same time, the middle bending portion of the flexible display 13 can be prevented from being completely separated from the support of the base 2, and the base 2 and the two supporting plates 331 respectively lean against the middle bending portion of the flexible display 13 from different directions, so that the middle bending portion of the flexible display 13 can be effectively accommodated in the accommodating space 14, thereby preventing the middle bending portion from being pressed or suspended, and avoiding weakening the effect of the compensation folding path.

Therefore, the invention has the following advantages:

1. the folding path compensation mechanism can effectively thin and compensate the whole folding path mechanism through the connection relation and the structural characteristics among the first sliding block, the supporting plate body, the linkage plate and the cam connecting rod module, and further can simplify the use of parts to reduce the production cost. The second connecting part of the supporting plate body swings in an arc mode relative to the first connecting part of the first sliding block to generate a free swing effect similar to a shaftless seesaw, namely, the second connecting part does not need to be pivoted with a solid shaft as in the prior art, the volume and the thickness are reduced, and the effect of thinning is facilitated.

2. The invention uses the middle transmission part with a third sliding part at one end to interlock the first sliding part of the interlocking plate to form relative movement, and uses the fourth sliding part at the other end of the middle transmission part to interlock the second sliding part of the interlocking part to enable the interlocking part to move in the direction opposite to the interlocking plate, therefore, the invention can form the effect of moving quickly and slowly in the folding process of the fixed shell connecting the first sliding part and the movable shell connecting the interlocking part, thereby achieving the effect of compensating the folding path difference, forming the space capable of containing the bending part of the flexible display more quickly, avoiding the force of the folding action from pulling or pushing the flexible display, and prolonging the service life of the flexible display.

3. When the first shell and the second shell are oppositely turned and unfolded, the limiting part at one end of the supporting plate can be guided by the first guide surface and the second guide surface to enable the limiting part to move smoothly, and then the limiting part is lapped and limited on the first stop part of the base so as to enable the two supporting plates to simultaneously support the flexible display upwards, therefore, when the supporting plates are bent and deformed, the stable transmission effect can still be ensured.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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 invention.

Claims

1. A rotary shaft module of a folding device is characterized in that one end face of the rotary shaft module is simultaneously contacted with a flexible display to enable the flexible display to be relatively bent, and the other end face of the rotary shaft module is respectively connected with a first shell and a second shell so as to drive the first shell and the second shell to enable the first shell and the second shell to be relatively turned over; the first shell comprises a fixed shell and a movable shell which can stretch relative to the fixed shell; the rotating shaft module comprises a base and a first sliding mechanism, wherein one end of the base comprises a first pivot part, a second pivot part and a first stopping part; the first sliding mechanism includes:

a first connecting rod connected with the fixed shell, wherein one end of the first connecting rod is pivoted with the first pivoting part;

the first sliding block is connected with the movable shell, the first sliding block is connected to one side of the first connecting rod in a relatively sliding mode, and the first sliding block is provided with a first connecting part;

one end of the supporting plate body is provided with a limiting part so as to be limited on the first stopping part, one side of the supporting plate body is provided with a second connecting part, and the second connecting part is connected with the first connecting part so as to facilitate the arc-shaped swinging of the supporting plate body relative to the first sliding block;

one end of the linkage plate is pivoted with the second pivoting part, the other end of the linkage plate is provided with a moving piece, the moving piece is provided with a first sliding part, and the moving piece is limited on the fixed shell in a relatively movable mode;

a linkage piece connected with the movable shell, wherein the linkage piece is provided with a second sliding part; and

the middle transmission piece is provided with a fulcrum so as to be pivoted and positioned on the fixed shell, one end of the middle transmission piece is provided with a third sliding part which slides relative to the first sliding part to drive the linkage plate to move, and the other end of the middle transmission piece is provided with a fourth sliding part which slides relative to the second sliding part to drive the linkage piece to move in the direction opposite to the direction of the linkage plate.

2. The hinge module of a foldable device according to claim 1, wherein the first stop is a stepped surface formed at one end of the base to limit the supporting plate from deviating by an angle.

3. The hinge module of a foldable device as claimed in claim 1, wherein one end of the first link is pivotally connected to the first pivot portion by a first pivot, and an end adjacent to the first link has a first guiding surface extending in a direction away from the one end and inclined downward.

4. The hinge module of claim 3, further comprising a first supporting surface adjacent to the first guiding surface and forming an included angle with the first guiding surface, so that the offset limiting portion of the supporting plate abuts against and bears against the first guiding surface.

5. The hinge module of a folding apparatus according to claim 1, wherein one end of the first slider has a slope, and the first connecting portion is an arc-shaped guide groove formed at one side of the first slider and recessed inward from the slope; the second connecting portion comprises an arc-shaped portion and a reset piece, the arc-shaped portion is formed on one side of the supporting plate body, and two ends of the reset piece are respectively connected with the arc-shaped portion and the first sliding block, so that the arc-shaped portion can be accommodated in the arc-shaped guide groove in a relative arc-shaped sliding mode.

6. The hinge module of a folding apparatus according to claim 5, wherein the supporting plate includes a supporting plate and a connecting plate, one end of the connecting plate is connected to the supporting plate, and the other end of the connecting plate has the arc portion of the second connecting portion.

7. The hinge module of a foldable device as claimed in claim 1, wherein the linkage plate comprises a first linkage plate and a second linkage plate stacked and connected with each other, the first linkage plate has a first shaft at one end thereof, the second linkage plate has a second shaft at one end thereof, and the first shaft and the second shaft are pivotally connected to the second pivotal portion respectively.

8. The hinge module of a foldable device according to claim 1 or 7, wherein the other end of the linking plate is pivotally connected to one end of the moving member.

9. The hinge module of a foldable device as claimed in claim 8, wherein the stationary housing has an elongated guide slot, and the moving member has a guide post on a bottom surface thereof, the guide post penetrating into the elongated guide slot, so that the moving member is relatively movably retained on the stationary housing.

10. The hinge module of a folding device of claim 1, wherein the first sliding portion is an elongated slot formed at an end of the intermediate transmission member, and the third sliding portion is an elongated cylinder formed on a top surface of the movable member, the elongated slot being received by the elongated cylinder.

11. The hinge module of a foldable device as claimed in claim 1, wherein the second sliding portion is an elongated slot formed on a top surface of the linkage, and the fourth sliding portion is a lower convex cylinder at the other end of the middle transmission member, and the lower convex cylinder is received in the elongated slot.

12. The hinge module of claim 11, further comprising a V-shaped slot formed on a top surface of the linking member, wherein the second sliding portion is located in the V-shaped slot.

13. The hinge module of claim 1, further comprising a second link, the second link being connected to the fixed housing, a second pivot being pivotally connected to the first pivot portion at one end of the base, one end of the second link being fixedly connected to the second pivot, so that the second pivot, the second link and the fixed housing rotate synchronously.

14. The hinge module of a folding device of claim 13, wherein the end adjacent to the second link has a second guide surface extending obliquely downward in a direction away from the end.

15. The hinge module of claim 14, further comprising a second supporting surface adjacent to the second guiding surface and forming an included angle with the second guiding surface, so that the offset limiting portion of the supporting plate abuts against and bears against the second guiding surface.

16. The hinge module of claim 1, wherein the other end of the base further has a third pivot portion, a fourth pivot portion and a second stop portion, and the hinge module further comprises a second sliding mechanism, the second sliding mechanism and the first sliding mechanism have the same structure and are symmetrically disposed at two ends of the base.