CN109404411B

CN109404411B - Flexible display device, supporting device and double-shaft type pivot module

Info

Publication number: CN109404411B
Application number: CN201710696885.7A
Authority: CN
Inventors: 徐安赐
Original assignee: Shenzhen Fushida Communication Co ltd; First Dome Corp
Current assignee: Shenzhen Fushida Communication Co ltd; First Dome Corp
Priority date: 2017-08-15
Filing date: 2017-08-15
Publication date: 2020-06-16
Anticipated expiration: 2037-08-15
Also published as: CN109404411A

Abstract

A flexible display device comprises a bearing plate, two supporting devices and a flexible display screen, wherein the two supporting devices and the flexible display screen are arranged on two opposite side surfaces of the bearing plate. Each supporting device comprises a double-shaft type pivot module and two buffer modules positioned on two opposite outer sides of the double-shaft type pivot module. Each double-shaft type pivot module comprises two shaft rods, a linkage piece clamped between the two shaft rods, and two side wing pieces which are respectively and slidably arranged on the two shaft rods. The two buffer modules are respectively arranged on the two shaft levers and are respectively matched with the two side wing pieces, and each buffer module comprises an internal connecting piece which is fixed on the corresponding shaft lever and can synchronously rotate with the corresponding shaft lever and an external connecting piece which is fixed on the inner surface of the bearing plate and can be arranged on the internal connecting piece in a relative sliding mode. Each side wing piece comprises a limiting part which penetrates through the corresponding internal connecting piece and the corresponding external connecting piece. Therefore, the external connector and the internal connector of each buffer module move relatively to avoid the flexible display screen from being bent and damaged.

Description

Flexible display device, supporting device and double-shaft type pivot module

Technical Field

The present invention relates to a display device, and more particularly, to a flexible display device, a supporting device and a dual-axis hinge module.

Background

When the conventional supporting device is bent, since the total length of the hinge module in the conventional supporting device is maintained before and after bending, the plate installed outside the supporting device may be stretched, which may cause deformation of the plate. That is, when the flexible display panel is mounted on the conventional supporting device and bent, the flexible display panel mounted on the outer side of the supporting device is easily stretched by the supporting device, which may cause damage to the flexible display panel.

The present inventors have considered that the above-mentioned defects can be improved, and as a result, they have made intensive studies and have conducted scientific principles to provide the present invention which is designed reasonably and effectively to improve the above-mentioned defects.

Disclosure of Invention

Embodiments of the present invention provide a flexible display device, a supporting device, and a dual-axis hinge module, which can effectively overcome the defects of the supporting device and the hinge module.

The embodiment of the invention discloses a flexible display device, which comprises: a bearing plate having an inner surface and an outer surface on opposite sides; the flexible display screen is arranged on the outer surface of the bearing plate; and two supporting devices arranged on the inner surface of the bearing plate and defining two rotating axes which are parallel to each other, wherein each supporting device comprises: a dual axis hinge module, comprising: the two shaft levers are respectively arranged along the two rotating axes, and a spiral track groove is concavely formed on the outer surface of each shaft lever; a linkage member clamped between the two shaft levers and having a driving portion formed at each of opposite sides thereof, the two driving portions being respectively inserted into the two spiral track grooves; the two side wing pieces are respectively and slidably arranged on the two shaft rods, and each side wing piece comprises a limiting part; one of the two shaft levers can rotate, so that the linkage part moves to drive the other shaft lever to rotate synchronously and drive the two side wing parts to move along the two shaft levers respectively; and two buffer modules respectively located at two opposite outer sides of the two shaft rods, the two buffer modules being respectively installed at the two shaft rods and respectively matched with the two wing pieces, each buffer module comprising: the inner connecting piece is fixed on the corresponding shaft rod and can synchronously rotate with the corresponding shaft rod, a long hole parallel to any one rotating axis is formed in the inner connecting piece, and the limiting part of the corresponding wing piece penetrates through the long hole; the outer connecting piece is fixed on the inner surface of the bearing plate and can be arranged on the inner connecting piece in a relatively sliding mode, an inclined hole which is not parallel to the long hole is formed in the outer connecting piece, the inclined hole is provided with a first end which is close to the corresponding shaft rod and a second end which is far away from the corresponding shaft rod, and the limiting part of the corresponding wing piece penetrates through the inclined hole; when the bearing plate is bent from a flat-out position to an outward-folded position by taking at least one of the two rotating axes as an axis, the external connector of each buffer module slides relative to the internal connector, and each limiting part moves from the first end to the second end of the corresponding oblique hole.

Preferably, each linkage piece comprises a linkage block and a linkage rod fixed on the linkage block in a penetrating way; in each biaxial hinge module, the linkage block is clamped between the two shaft rods and the driving parts are respectively formed on two opposite sides in a protruding manner.

Preferably, each of the two-axis hinge modules includes two linking members, each of which is sleeved on the two shaft rods and located on two opposite sides of the linking block; in each double-shaft type pivot module, two ends of the linkage rod are respectively abutted against the inner side surfaces of the two linking pieces, two end parts of each wing piece are respectively slidably sleeved on the corresponding shaft rods and respectively abutted against the outer side surfaces of the two linking pieces, and the linkage piece can synchronously move with the two linking pieces so as to synchronously drive the two wing pieces to respectively move along the two shaft rods.

Preferably, each external connector comprises a bottom plate and two rail seats arranged on the bottom plate, and each internal connector is slidably arranged on the two rail seats of the corresponding external connector; the two bottom plates of one of the two support devices are respectively of a one-piece construction integrally formed with the two bottom plates of the other of the two support devices.

Preferably, each buffer module includes a limiting mechanism installed in the inner connecting piece, each outer connecting piece is formed with two limiting grooves, and when the bearing plate bends from the flattening position toward the folding position, each buffer module the limiting mechanism is self-embedded in two of the limiting grooves of the outer connecting piece, one of the limiting grooves moves toward the other limiting groove.

Preferably, each of the biaxial hinge modules comprises a plurality of torsion pieces arranged in a stacked manner; in each of the biaxial hinge modules, the two shaft rods pass through each of the torsion pieces, and the two shaft rods can rotate relative to each of the torsion pieces, so that the two shaft rods respectively rub against each of the torsion pieces to generate torsion.

The embodiment of the invention also discloses a supporting device, which is used for being arranged on a bearing plate, and the supporting device comprises: a dual axis hinge module, comprising: the two shaft levers are respectively arranged along the two rotating axes, and a spiral track groove is concavely formed on the outer surface of each shaft lever; a linkage member clamped between the two shaft levers and having a driving portion formed at each of opposite sides thereof, the two driving portions being respectively inserted into the two spiral track grooves; the two side wing pieces are respectively and slidably arranged on the two shaft rods, and each side wing piece comprises a limiting part; one of the two shaft levers can rotate, so that the linkage part moves to drive the other shaft lever to rotate synchronously and drive the two side wing parts to move along the two shaft levers respectively; and two buffer modules respectively located at two opposite outer sides of the two shaft rods, the two buffer modules being respectively installed at the two shaft rods and respectively matched with the two wing pieces, each buffer module comprising: the inner connecting piece is fixed on the corresponding shaft rod and can synchronously rotate with the corresponding shaft rod, a long hole parallel to any one rotating axis is formed in the inner connecting piece, and the limiting part of the corresponding wing piece penetrates through the long hole; and the external part is arranged on the internal part in a relatively sliding manner and is used for being fixed on the inner surface of the bearing plate, an inclined hole which is not parallel to the elongated hole is formed in the external part, the inclined hole is provided with a first end which is adjacent to the corresponding shaft rod and a second end which is far away from the corresponding shaft rod, and the limiting part of the corresponding wing part penetrates through the inclined hole.

Preferably, each linkage piece comprises a linkage block and a linkage rod fixed on the linkage block in a penetrating way; in the biaxial hinge module, the linkage block is clamped between the two shaft rods and the driving parts are respectively formed on two opposite sides in a protruding manner.

Preferably, the biaxial hinge module includes two linking members, each of which is sleeved on the two shafts and located on two opposite sides of the linking block; in the double-shaft type pivot module, two ends of the linkage rod are respectively abutted against the inner side surfaces of the two linking pieces, two end parts of each wing piece are respectively slidably sleeved on the corresponding shaft rods and respectively abutted against the outer side surfaces of the two linking pieces, and the linkage piece can synchronously move with the two linking pieces so as to synchronously drive the two wing pieces to respectively move along the two shaft rods.

The embodiment of the invention also discloses a double-shaft pivot module, which comprises: the two shaft rods are arranged in parallel, and a spiral track groove is concavely formed on the outer surface of each shaft rod; the linkage block is clamped between the two shaft rods, and two opposite sides of the linkage block are respectively provided with a driving part in a protruding manner, and the two driving parts are respectively arranged in the two spiral track grooves in a penetrating manner; the two linking pieces are respectively sleeved on the two shaft rods and are respectively positioned on two opposite sides of the linkage block, and two ends of the linkage rod are respectively abutted against the inner side surfaces of the two linking pieces; the two side wing pieces are respectively arranged on the two shaft rods, two end parts of each side wing piece are respectively sleeved on the corresponding shaft rods in a sliding manner and respectively abut against the outer side surfaces of the two connecting pieces, and each side wing piece comprises a limiting part; the linkage piece can move synchronously with the two connecting pieces so as to synchronously drive the two side wing pieces to move along the two shaft rods respectively.

In summary, in the flexible display device, the supporting devices, and the dual-axis hinge module disclosed in the embodiments of the present invention, when the two shaft rods rotate (e.g., when the supporting plate is bent), each supporting device can make the external connection element and the internal connection element of each buffer module move relatively within a specific distance through the cooperation between the dual-axis hinge module and the two buffer modules connected thereto, so as to prevent the flexible display screen from being damaged.

For a better understanding of the nature and technical content of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for illustration purposes only and are not intended to limit the scope of the invention in any way.

Drawings

FIG. 1 is a schematic perspective view of a flexible display device in a flat position according to the present invention.

FIG. 2 is a schematic perspective view of a flexible display device in a folded position according to the present invention.

Fig. 3 is a schematic cross-sectional view of fig. 2 along the sectional line iii-iii.

Fig. 4 is a schematic cross-sectional view of fig. 2 along the sectional line IV-IV.

Fig. 5 is a schematic perspective cross-sectional view of fig. 2.

Fig. 6 is a perspective view illustrating the support device of fig. 1 separated from the support plate.

Fig. 7 is a perspective view of fig. 6 from another angle.

Fig. 8 is an exploded view of the support device of the present invention.

Fig. 9 is a schematic cross-sectional view of the biaxial hinge module of fig. 8 along the sectional line IX-IX.

Fig. 10 is a perspective view of the dual-axis hinge module of fig. 8 (omitting the positioning element).

Fig. 11 is an exploded view of fig. 10 (omitting the positioning member).

Fig. 12 is a perspective view (omitting the positioning element) from another view angle of fig. 10.

Fig. 13 is a perspective view of the buffer module of fig. 8.

Fig. 14 is an exploded view of fig. 13.

Fig. 15 is a perspective view of fig. 13 from another perspective.

Detailed Description

Referring to fig. 1 to fig. 15, it should be noted that, in the embodiment of the present invention, relevant numbers and shapes mentioned in the corresponding drawings are only used for describing the embodiments of the present invention in detail, so as to facilitate understanding of the content of the present invention, and are not used for limiting the protection scope of the present invention.

Referring to fig. 1 to 7, the present embodiment discloses a flexible display device 1000, which includes a supporting board 200, two supporting devices 100 mounted on an inner surface 201 of the supporting board 200, and a flexible display 300 mounted on an outer surface 202 of the supporting board 200. The two support devices 100 define two rotation axes L parallel to each other. In this embodiment, the bearing plate 200 includes a rubber sheet and a metal sheet embedded in the rubber sheet, but the bearing plate 200 of the present invention is not limited thereto. Moreover, the flexible display apparatus 1000 of the present embodiment particularly means that the center of the flexible display 300 (for example, the portion of the flexible display 300 corresponding to the two supporting devices 100) can be bent outward by 180 degrees (for example, as shown in fig. 2) without being damaged, but the invention is not limited thereto.

It should be noted that the linkage relationship in the flexible display apparatus 1000 belongs to relative movement, but in the drawings of the present embodiment, a manner of fixing a part of the components will be described for clearly understanding the present invention. Furthermore, although the embodiment has been described with two supporting devices 100 applied to the flexible display apparatus 1000, the supporting devices 100 may also be applied to other apparatuses, and are not limited to the flexible display apparatus 1000 described in the embodiment.

The flexible display device 1000 can be bent from a flat position (e.g., fig. 1) to a folded position (e.g., fig. 2), so that the following description will first describe the structure of each component when the flexible display device 1000 is located at the flat position, and then timely describe the connection relationship of each component of the flexible display device 1000 and the actuation relationship of each component when the flexible display device 1000 is located at the folded position. Since the two support devices 100 have substantially the same or symmetrical structure, for avoiding redundancy, only the component structure of one support device 100 and the connection relationship thereof will be described below.

As shown in fig. 8 and 9, the supporting device 100 includes a dual-axis hinge module 1 and two buffer modules 2 respectively located at two opposite outer sides of the dual-axis hinge module 1. Although the embodiment describes the application of the dual-axis hinge module 1 to the supporting device 100, the dual-axis hinge module 1 can also be applied to other devices, and is not limited to the supporting device 100 described in the embodiment.

The biaxial hinge module 1 includes two shaft rods 11, a plurality of torsion pieces 12, a linking member 13, two linking members 14, two side wing members 15, and two positioning members 16. The two shaft levers 11 are respectively arranged along the two rotation axes L, each torsion piece 12 is sleeved on the two shaft levers 11, the linkage 13 is partially clamped between the two shaft levers 11, the two linking pieces 14 are located at two ends of the linkage 13 and respectively sleeved on the two shaft levers 11, and the two wing pieces 15 are respectively slidably mounted on the two shaft levers 11. The construction of each component and its connection relationship in the biaxial hinge module 1 will be described separately below.

As shown in fig. 10 to 12, the two shafts 11 are spaced apart from each other in a substantially parallel manner, that is, the central axes of the two shafts 11 overlap the two rotation axes L, respectively. Since the two shafts 11 are substantially mirror-symmetrical in the present embodiment, the structure of the single shaft 11 will be described below for the convenience of understanding the structure of the shaft 11.

The shaft 11 includes a driving section 111, two extending sections 112 respectively located at two opposite outer sides of the driving section 111 (e.g., left and right sides of the driving section 111 in fig. 11), and two fastening sections 113 located at two opposite outer sides of the two extending sections 112 (e.g., left and right sides of the two extending sections 112 in fig. 11). The driving section 111 is substantially cylindrical and has a maximum outer diameter, that is, the maximum outer diameter of the shaft 11, the cross section of each embedding section 113 is non-circular, and the cross section of each extending section 112 can be designed to be circular or non-circular according to the requirement.

In more detail, the shaft 11 is concavely formed with two spiral track grooves 1111 on the outer surface of the driving section 111, and the spiral angle of each spiral track groove 1111 ranges from 40 degrees to 60 degrees. The spiral angle is 45 degrees in this embodiment, but the invention is not limited thereto. The depth of each spiral track groove 1111 is between 1/5 and 1/7 of the maximum outer diameter of the driving section 111, and the depth of the spiral track groove 1111 is about 1/6 of the maximum outer diameter of the driving section 111 in the present embodiment. Furthermore, each spiral track groove 1111 projects to a plane along the length direction of the shaft 11 (e.g. the direction of the rotation axis L) to form a projection area having a circular arc shape, and the central angle of the projection area is approximately within 90 degrees, which is illustrated as 90 degrees in the present embodiment, but the present invention is not limited thereto.

Each extension section 112 is substantially cylindrical in this embodiment, and the outer diameter of the extension section 112 is smaller than the maximum outer diameter of the driving section 111. Furthermore, each of the embedding sections 113 is a cylinder with a non-circular cross section, so that the two embedding sections 113 can be fixed to the two buffer modules 2 respectively.

When looking at the two shafts 11, the two extending sections 112 of each shaft 11 are respectively disposed through the stacked torsion pieces 12, that is, the torsion pieces 12 of the biaxial hinge module 1 are respectively disposed on opposite sides of the two driving sections 111 (for example, left and right sides of the two driving sections 111 in fig. 10). Thereby, the two shaft rods 11 can rotate relative to each torque sheet 12, so that the two extending sections 112 rub against each torque sheet 12 respectively to provide the torque required by the biaxial hinge module 1; and the plurality of torque pieces 12 are provided to effectively maintain the relative positions of the two shafts 11.

Furthermore, as shown in fig. 8, in the two shaft rods 11, the ends of any two adjacent embedding sections 113 are inserted and fixed in one of the positioning members 16. That is, the ends of the two embedded sections 113 of each shaft 11 are respectively fixed to the two positioning members 16. The two positioning members 16 are fixed at the central portions thereof to the supporting plate 200 and are located on the inner surface 201 of the supporting plate 200 (see fig. 6).

As shown in fig. 10 to 12, the linking member 13 includes a linking block 131 and a linking rod 132 connected to (e.g., fixed to) the linking block 131. The connection manner between the linkage rod 132 and the linkage block 131 may be integrally connected or detachably connected to each other, and the invention is not limited thereto.

The linkage block 131 includes two recessed surfaces 1311 respectively located at two opposite sides (e.g., the front side and the rear side of the linkage block 131 in fig. 11) and two driving portions 1312 formed by protruding from the bottom of each recessed surface 1311. In the embodiment, the four driving portions 1312 of the linkage block 131 are disposed substantially in mirror symmetry, but the invention is not limited thereto.

In more detail, the linkage block 131 is sandwiched between the two shafts 11, and the two recessed surfaces 1311 of the linkage block 131 face the driving sections 111 of the two shafts 11, respectively. Each recessed surface 1311 receives a corresponding portion of the shaft 11, and the two driving portions 1312 on each recessed surface 1311 are respectively disposed through the two spiral track grooves 1111 of the corresponding shaft 11.

Moreover, in order to stabilize the connection relationship between the two shafts 11 and the linkage block 131, the stability of the connection relationship between the two shafts 11 and the linkage block 131 is further improved by the following structural design.

Specifically, in a cross section of the two shafts 11 and the linkage block 131 in the embodiment (for example, fig. 9, the cross section is a cross section perpendicular to a central axis of any one of the shafts 11 in the embodiment), each driving segment 111 is substantially circular, each concave surface 1311 is substantially circular arc-shaped, centers of the two concave surfaces 1311 are substantially located at centers of the two driving segments 111, a radius of each concave surface 1311 is substantially equal to (or slightly larger than) a radius of each driving segment 111, and a central angle of each concave surface 1311 is preferably between 80 degrees and 110 degrees (the central angle of the concave surface 1311 in the embodiment is substantially 90 degrees), but the invention is not limited thereto.

In addition, although the embodiment describes that the shaft 11 is formed with two spiral track grooves 1111 and the linkage block 131 is formed with two driving portions 1312 on each concave surface 1311, in an embodiment not shown in the present invention, the shaft 11 may be formed with a single spiral track groove 1111, and the linkage block 131 is formed with a single driving portion 1312 on each concave surface 1311 to penetrate through the spiral track groove 1111 of the shaft 11.

As shown in fig. 10 to 12, the long axis direction of the lever 132 is substantially parallel to any rotation axis L, and the lever 132 includes a fixed segment 1321 and two connecting segments 1322 extending from two ends of the fixed segment 1321. The fixed segment 1321 is embedded in the linkage block 131, the two connecting segments 1322 respectively pass through the plurality of torsion plates 12, and each connecting segment 1322 is preferably in low-friction or frictionless contact with any one of the corresponding torsion plates 12, so as to facilitate the two connecting segments 1322 to slide relative to the plurality of torsion plates 12.

As shown in fig. 10 to 12, the two linking members 14 are respectively sleeved on the two shafts 11 and respectively located at two opposite sides of the linking block 131, and two ends of the linking rod 132 (e.g., ends of the two connecting segments 1322 in fig. 11) respectively abut against inner side surfaces of the two linking members 14. Preferably, there is low friction or frictionless contact between each shaft 11 and the corresponding coupling member 14 to facilitate sliding of each coupling member 14 along the two shafts 11. It should be noted that each of the connecting elements 14 of the present embodiment is illustrated as a plurality of pads arranged in a stacked manner, but the present invention is not limited thereto. For example, in an embodiment of the present invention, which is not shown, the connecting member 14 may also be a one-piece structure.

As shown in fig. 10 to 12, the two side members 15 are respectively located at two opposite sides of the linking member 13 and are respectively slidably mounted on the two shafts 11. In the present embodiment, each of the side wing members 15 includes an elongated rod 151, a wing 152 vertically connected to the elongated rod 151, a limiting portion 153 protruding from the end of the wing 152, and two end portions 154 respectively mounted on opposite ends of the elongated rod 151.

Wherein the elongate bar 151 of each wing member 15 is parallel to either axis of rotation L and the elongate bar 151 of each wing member 15 is of an integral T-shaped configuration with the wing 152. Each stopper 153 is integrally formed with the corresponding wing 152 and faces the inner surface 201 of the carrier plate 200. The two ends 154 of each wing member 15 are slidably sleeved on the corresponding shaft 11 and respectively abut against the outer side surfaces of the two connecting members 14. The aforementioned low friction or frictionless contact between each shaft 11 and the corresponding end 154 is preferred to facilitate sliding of each end 154 along the corresponding shaft 11.

Accordingly, the linking member 13 can move synchronously with the two linking members 14 to drive the two side members 15 to move along the two shafts 11 respectively. In other words, the linkage 13, the two connectors 14, and the two side members 15 move along any rotation axis L synchronously with respect to the two shafts 11 and the torsion pieces 12.

In addition, although the two linking members 14 of the present embodiment are different components from the linking member 13, the present invention is not limited thereto. For example, in the embodiment of the present invention not shown in the drawings, the two linking parts 14 can be regarded as part of the linking part 13 and can be assembled with the two connecting segments 1322 of the linking rod 132 respectively; alternatively, the two connecting elements 14 can also be considered as part of the two lateral wings 15 and can be assembled with the four ends 154 of the two lateral wings 15. Accordingly, when one of the two shafts 11 can rotate, the linking member 13 moves to drive the other shaft 11 to rotate synchronously and drive the two side wing members 15 to move along the two shafts 11 respectively.

As shown in fig. 8, 13 to 15, the two cushion modules 2 are respectively mounted on the two shafts 11 and respectively fitted to the two wing members 15. The position of any one of the cushion modules 2 mounted on the two shafts 11 is located between the positioning member 16 and the end 154 of the adjacent wing member 15, and is the end point of the operation path of the two wing members 15. Moreover, since the two buffer modules 2 have substantially the same or symmetrical structure, for avoiding redundancy, only the component structure and the connection relationship of one of the buffer modules 2 will be described below.

The buffer module 2 includes an inner connector 21, an outer connector 22, and two limiting mechanisms 23. The inner connecting piece 21 is fixed on the corresponding shaft rod 11 and can rotate synchronously with the corresponding shaft rod 11, the outer connecting piece 22 is fixed on the inner surface 201 of the bearing plate 200 and can be arranged on the inner connecting piece 21 in a relatively sliding manner, and the two limiting mechanisms 23 are arranged on the inner connecting piece 21 and can be used for positioning the outer connecting piece 22.

The inner connecting member 21 of the present embodiment includes a sheet 211 and two pivoting blocks 212 fixed to the sheet 211. The two pivoting blocks 212 are respectively fixed to the two embedded sections 113 of the corresponding shaft 11, and each pivoting block 212 is substantially located between the positioning element 16 and the end 154 of the adjacent wing element 15. The sheet body 211 is formed with an elongated hole 2111 parallel to any one of the rotation axes L, and the length of the elongated hole 2111 is greater than the distance of the corresponding wing member 15 moving along the rotation axis L, and the position-limiting portion 153 of the corresponding wing member 15 is inserted into the elongated hole 2111.

Furthermore, the external connector 22 of the present embodiment includes a bottom plate 221 and two rail bases 222 disposed on the bottom plate 221. The bottom plate 221 and the two rail bases 222 are fixed to the carrier plate 200 and located on the inner surface 201 of the carrier plate 200, and the bottom plate 221 is formed with an oblique hole 2211 non-parallel to the elongated hole 2111, for example: the angled bore 2211 is generally disposed at an acute angle relative to the elongated bore 2111. The oblique hole 2211 has a first end 2212 adjacent to the corresponding shaft 11 and a second end 2213 away from the corresponding shaft 11, and the position-limiting portion 153 of the corresponding wing member 15 passes through the elongated hole 2111 and then passes through the oblique hole 2211. Each (the body 211 of the) inner connector 21 is slidably disposed on the two rail seats 222 of the outer connector 22, and each rail seat 222 is formed with two limiting grooves 2221.

Each of the limiting mechanisms 23 of the present embodiment includes a base 231, a limiting member 232 disposed on the base 231, and a plurality of springs 233 (see fig. 15) connecting the base 231 and the limiting member 232. The seat bodies 231 of the two limiting mechanisms 23 are fixed on the sheet body 211 of the inner connecting member 21, and the springs 233 of the two limiting mechanisms 23 tend to drive the two limiting members 232 to move toward the two track seats 222, so that the two limiting members 232 are respectively kept in contact with the two track seats 222, and each limiting member 232 is selectively embedded in one of the two limiting grooves 2221 of the corresponding track seat 222.

Further, when the carrier plate 200 is bent from the flat position (e.g., fig. 1 and 8) toward the folded position (e.g., fig. 3 to 5) with at least one of the two rotation axes L as the axis (i.e., when the carrier plate 200 is bent), the external connector 22 of each buffer module 2 slides relative to the internal connector 21, and each position-limiting portion 153 moves from the first end 2212 to the second end 2213 of the corresponding inclined hole 2211, and (the position-limiting member 232 of) each position-limiting mechanism 23 moves from one position-limiting groove 2221 of the two position-limiting grooves 2221 embedded in the external connector 22 toward the other position-limiting groove 2221.

It should be noted that, since the width of the supporting board 200 (e.g. perpendicular to the rotation axis L) and the width of each biaxial hinge module 1 (e.g. the maximum distance between two lateral wing members 15) are not changed before and after bending, the distance between two external connecting members 22 of each supporting device 100 installed on the supporting board 200 is not changed before and after bending, and the distance between two internal connecting members 21 installed on the biaxial hinge module 1 is also not changed before and after bending. Therefore, when the carrier plate 200 is bent from the flat position to the folded position, the two inner connectors 21 located inside the carrier plate 200 will slide outward relative to the two corresponding outer connectors 22.

Therefore, the flexible display device 1000 can effectively prevent the bearing plate 200 from being further bent towards the direction away from the flattening position when the bearing plate 200 is bent to the outward-folding position through the cooperation between the inclined hole 2211 and the limiting portion 153 and the cooperation between the limiting mechanism 23 and the two limiting grooves 2221 of the external connector 22, that is, prevent the bearing plate 200 (or the flexible display screen 300 from being folded inwards).

It should be noted that, in the present embodiment, the two bottom plates 221 of one of the two supporting devices 100 and the two bottom plates 221 of the other supporting device 100 are respectively of a single-piece structure integrally formed, but the invention is not limited thereto. For example, in an embodiment not shown in the present invention, the two bottom plates 221 of any supporting device 100 may be separated from the two bottom plates 221 of another supporting device 100.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A flexible display device, comprising:

a bearing plate having an inner surface and an outer surface on opposite sides;

the flexible display screen is arranged on the outer surface of the bearing plate; and

two strutting arrangements, set up in the internal surface of loading board and define two pivot axes that are parallel to each other, every strutting arrangement contains:

a dual axis hinge module, comprising:

the two shaft levers are respectively arranged along the two rotating axes, and a spiral track groove is concavely formed on the outer surface of each shaft lever;

a linkage member clamped between the two shaft levers and having a driving portion formed at each of opposite sides thereof, the two driving portions being respectively inserted into the two spiral track grooves; and

two side wing pieces which are respectively arranged on the two shaft rods in a sliding way, and each side wing piece comprises a limiting part;

one of the two shaft levers can rotate, so that the linkage part moves to drive the other shaft lever to rotate synchronously and drive the two side wing parts to move along the two shaft levers respectively; and

two buffer modules respectively located at two opposite outer sides of the two shaft rods, the two buffer modules being respectively installed at the two shaft rods and respectively matched with the two wing pieces, each buffer module comprising:

the inner connecting piece is fixed on the corresponding shaft rod and can synchronously rotate with the corresponding shaft rod, a long hole parallel to any one rotating axis is formed in the inner connecting piece, and the limiting part of the corresponding wing piece penetrates through the long hole; and

the external part is fixed on the inner surface of the bearing plate and can be arranged on the internal part in a relatively sliding manner, an inclined hole which is not parallel to the long hole is formed in the external part, the inclined hole is provided with a first end which is adjacent to the corresponding shaft rod and a second end which is far away from the corresponding shaft rod, and the limiting part of the corresponding wing part penetrates through the inclined hole;

when the bearing plate is bent from a flat-out position to an outward-folded position by taking at least one of the two rotating axes as an axis, the external connector of each buffer module slides relative to the internal connector, and each limiting part moves from the first end to the second end of the corresponding oblique hole.

2. The flexible display device as claimed in claim 1, wherein each of the linkage members comprises a linkage block and a linkage rod passing through and fixed to the linkage block; in each biaxial hinge module, the linkage block is clamped between the two shaft rods and the driving parts are respectively formed on two opposite sides in a protruding mode.

3. The flexible display device as claimed in claim 2, wherein each of the two-axis hinge modules comprises two connecting members respectively sleeved on the two shafts and respectively located at two opposite sides of the linkage block; in each double-shaft type pivot module, two ends of each linkage rod are respectively abutted against the inner side surfaces of the two linking pieces, two end parts of each wing piece can be respectively sleeved on the corresponding shaft rods in a sliding manner and respectively abutted against the outer side surfaces of the two linking pieces, and the linkage pieces can synchronously move with the two linking pieces so as to synchronously drive the two wing pieces to respectively move along the two shaft rods.

4. A flexible display device as in claim 1 wherein each external device comprises a base plate and two rail bases disposed on the base plate, and each internal device is slidably disposed on the two rail bases of the corresponding external device.

5. The flexible display device as claimed in claim 1, wherein each of the buffer modules comprises a position-limiting mechanism mounted on the inner connecting member, each of the outer connecting members is formed with two position-limiting grooves, and when the carrier plate is bent from the flat position toward the folded position, the position-limiting mechanism of each of the buffer modules moves from one of the position-limiting grooves embedded in the two position-limiting grooves of the outer connecting member toward the other position-limiting groove.

6. The flexible display device of any of claims 1 to 5, wherein each of the two-axis hinge modules comprises a plurality of torsion pieces stacked on each other; in each of the biaxial hinge modules, two of the shaft rods pass through each of the torsion pieces, and the two shaft rods can rotate relative to each of the torsion pieces, so that the two shaft rods respectively rub against each of the torsion pieces to generate torsion.

7. A supporting device for being mounted on a bearing plate, the supporting device comprising:

a dual axis hinge module, comprising:

the two shaft levers are respectively arranged along the two rotating axes, and the outer surface of each shaft lever is concavely provided with a spiral track groove;

the outer connecting piece is arranged on the inner connecting piece in a relatively sliding mode and used for being fixed on the inner surface of the bearing plate, an inclined hole which is not parallel to the long hole is formed in the outer connecting piece, the inclined hole is provided with a first end which is close to the corresponding shaft rod and a second end which is far away from the corresponding shaft rod, and the limiting portion of the corresponding wing piece penetrates through the inclined hole.

8. The supporting device as claimed in claim 7, wherein each of the linking members includes a linking block and a linking rod passing through and fixed to the linking block; in the biaxial hinge module, the linkage block is clamped between the two shaft rods and the driving parts are respectively formed on two opposite sides in a protruding manner.

9. The supporting device as claimed in claim 8, wherein the dual-axis hinge module includes two engaging members, the two engaging members are respectively sleeved on the two shafts and respectively located at two opposite sides of the linkage block; in the double-shaft type pivot module, two ends of the linkage rod are respectively abutted against the inner side surfaces of the two linking pieces, two end parts of each wing piece can be respectively sleeved on the corresponding shaft rods in a sliding manner and respectively abutted against the outer side surfaces of the two linking pieces, and the linkage piece can synchronously move with the two linking pieces so as to synchronously drive the two wing pieces to respectively move along the two shaft rods.

10. A dual-axis hinge module, comprising:

the two shaft levers are arranged in parallel, and a spiral track groove is concavely formed on the outer surface of each shaft lever;

the linkage block is clamped between the two shaft rods, and two opposite sides of the linkage block are respectively provided with a driving part in a protruding manner, and the two driving parts are respectively arranged in the two spiral track grooves in a penetrating manner;

the two linking pieces are respectively sleeved on the two shaft rods and are respectively positioned on two opposite sides of the linking block, and two ends of the linking rod are respectively abutted against the inner side surfaces of the two linking pieces; and

the two side wing pieces are respectively arranged on the two shaft rods, two end parts of each side wing piece can be respectively sleeved on the corresponding shaft rods in a sliding manner and respectively abut against the outer side surfaces of the two connecting pieces, and each side wing piece comprises a limiting part;

the linkage piece can move synchronously with the two connecting pieces so as to synchronously drive the two side wing pieces to move along the two shaft rods respectively.