CN114542586A

CN114542586A - Hinge device and folding display apparatus

Info

Publication number: CN114542586A
Application number: CN202210163483.1A
Authority: CN
Inventors: 青威; 王志会; 张磊; 莫文蔚
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-05-27

Abstract

The application discloses hinge means and folding display device belongs to the display device field. The hinge device includes: the device comprises a bracket, a synchronous component and at least one hinge group, wherein each hinge group comprises two hinge pieces; the hinge piece comprises a rotating shaft and a connecting piece, and the connecting piece is connected with the rotating shaft; the synchronizing component comprises a gear and two rack structures, and the two rack structures are respectively movably connected with the rotating shafts of the two hinge pieces and are meshed with the gear. The application provides a hinge device, synchronization assembly wherein includes gear and two rack structures, two rack structures and gear engagement, and respectively with two hinge plate connections in the hinge group, so alright come the rotation of two synchronous hinge plates through two rack structures and a gear, overall structure is comparatively simple, the great problem of hinge device's volume in the correlation technique has been solved, the volume that can reduce hinge device has been realized, and then be favorable to reducing the effect of folding display device's volume.

Description

Hinge device and folding display apparatus

Technical Field

The present disclosure relates to display devices, and particularly to a hinge device and a foldable display device.

Background

A folding display apparatus is a display device having a folding function, which includes a flexible display panel and a hinge device located at the back of a folding area of the display panel for controlling folding of the display panel.

The utility model provides a hinge means includes support, synchronous gear set and two hinge pieces, and two hinge pieces rotate with the support to be connected, and are used for fixed with the center of display screen, and synchronous gear set includes six intermeshing's gear for with the rotation of a hinge piece synchronous to another hinge piece, in order to guarantee that two hinge pieces can rotate in step.

However, the hinge device has a large number of gears in the synchronous gear set, which results in a large volume of the hinge device.

Disclosure of Invention

The embodiment of the application provides a hinge device and a folding display device. The technical scheme is as follows:

according to a first aspect of the present application, there is provided a hinge device comprising: the hinge assembly comprises a bracket, a synchronous assembly and at least one hinge group, wherein each hinge group comprises two hinge pieces;

the hinge piece comprises a rotating shaft and a connecting piece, the rotating shaft is rotatably connected with the bracket, and the connecting piece is connected with the rotating shaft;

the synchronous component is positioned on the support and comprises a gear and two rack structures, the gear is installed on the support, the two rack structures are respectively movably connected with the rotating shafts of the two hinge pieces, and the two rack structures are meshed with the gear.

Optionally, the rotating shaft includes a rotating part and a connecting rod, the rotating part is rotatably connected to the bracket and configured to rotate along an axis of the rotating shaft, and the connecting rod is located on the rotating part and does not coincide with the axis of the rotating shaft;

the rack structure includes the rack and is located locating part on the rack, the bar groove has on the locating part, the connecting rod is located in the bar groove of locating part, the external diameter of connecting rod with bar groove width direction's size matches, the length direction in bar groove with contained angle between the length direction of rack is greater than zero degree and is less than 180 degrees.

Optionally, the length direction of the strip-shaped groove is perpendicular to the length direction of the rack.

Optionally, the rotating shaft is located at one side of the bracket, and the gear and the racks of the two rack structures are located at the other side of the bracket;

the rack structure is characterized in that the support is provided with a strip-shaped opening, and the limiting part of the rack structure penetrates through the strip-shaped opening, so that the strip-shaped groove and the connecting rod are positioned on the same side of the support.

Optionally, the hinge arrangement comprises a first hinge set and a second hinge set;

the connecting rod of the first hinge piece in the first hinge group and the connecting rod of the second hinge piece in the second hinge group are of an integral structure, and the connecting rod of the third hinge piece in the first hinge group and the connecting rod of the fourth hinge piece in the second hinge group are of an integral structure.

Optionally, the axis of the gear is perpendicular to the axis of the rotating shaft of the hinge plate.

Optionally, the hinge device further comprises a support block and two support plates;

the two support plates are fixedly connected with the two connecting pieces respectively, when the hinge device is in a flattening state, the two support plates are parallel to each other, and the support blocks are located on the support and located between the two support plates.

Optionally, the hinge device further comprises a linkage;

the supporting block is movably connected with the support and is positioned at the bottom of the support when the hinge device is in a folded state, and the linkage piece is used for enabling the supporting block to be lifted from the bottom of the support and positioned between the two supporting plates when the hinge device is in a flattened state.

Optionally, the linkage piece includes the bellying that is located the first edge at the backup pad back, the back of backup pad is when hinge means is in the exhibition flat state, is close to the one side of support, first edge be the backup pad with the relative edge of another backup pad in two backup pads, when hinge means is fold condition, the bellying with the supporting shoe orientation one side butt of support.

Optionally, the hinge device further comprises an elastic component, the elastic component is respectively connected with the support block and the bracket, and when the support block is lifted from the bottom of the bracket, the elastic component is in a stretching state.

Optionally, the two support plates are rectangular, the support blocks are strip-shaped, and the length direction of the support blocks is parallel to two opposite edges of the two support plates.

Optionally, the support plate and the middle frame of the display screen are of an integral structure.

According to another aspect of the embodiments of the present application, there is provided a foldable display device including a display screen assembly and the hinge apparatus described above.

Optionally, the display screen assembly includes a middle frame and a display screen, the display screen is located on the middle frame, and a support plate in the hinge device is connected to one side of the middle frame, which is far away from the display screen.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the utility model provides an including the support, hinge means of synchronous subassembly and at least one hinge group, wherein synchronous subassembly includes gear and two rack structure, two rack structure and gear engagement, and respectively with two hinge plate connection in the hinge group, so alright come the rotation of two hinge plate in step through two rack structure and a gear, overall structure is comparatively simple, synchronous gear train comes two hinge plate in step through a plurality of gears among the correlation technique has been solved, lead to hinge means's the great problem of volume, the volume that can reduce hinge means has been realized, and then be favorable to reducing the effect of folding display device's volume.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a structure of a folding display device;

fig. 2 is a schematic structural diagram of a hinge device according to an embodiment of the present application;

FIG. 3 is a perspective view of the hinge assembly shown in FIG. 2;

FIG. 4 is a left side view of the hinge assembly shown in FIG. 2;

FIG. 5 is a schematic structural diagram of another hinge device provided in the embodiments of the present application;

FIG. 6 is a perspective view of the hinge assembly shown in FIG. 5;

FIG. 7 is a schematic structural diagram of another hinge device provided in an embodiment of the present application;

fig. 8 is an exploded view of a hinge assembly according to an embodiment of the present disclosure;

FIG. 9 is an exploded view of the bracket, gear and two rack structures of the hinge assembly shown in FIG. 8;

FIG. 10 is a schematic structural diagram of another hinge device provided in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another hinge device provided in an embodiment of the present application;

fig. 12 is a schematic perspective view of a hinge device according to an embodiment of the present application;

fig. 13 is a schematic perspective view of a back surface of a foldable display device according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a folding display device. The folding display device includes a flexible display panel 11 and a hinge device mounted on the back of the flexible display panel, the hinge device including a bracket 121, a synchronous gear set 122 and two hinge pieces 123. The two hinge plates 123 are located at two sides of the bracket 121, the synchronous gear set 122 includes six gears g, the six gears g are meshed with each other, and two of the gears g are respectively meshed with the two hinge plates 123 at two sides of the bracket 121, so that the two hinge plates 13 can rotate synchronously.

The two hinge pieces 123 are fixedly connected to the back surface of the display panel 11, and the hinge device 12 can enable the two parts of the display panel 11 to rotate synchronously when the display panel 11 rotates.

However, as can be seen from fig. 1, the hinge device has a large number of gears g, and the hinge device needs a large housing to accommodate the gears, which results in a large volume and thickness of the hinge device.

The embodiment of the application provides a hinge device and a folding display device, which can solve some problems existing in the technical scheme.

Fig. 2 is a schematic structural diagram of a hinge device according to an embodiment of the present application. Fig. 3 is a schematic perspective view of the hinge device shown in fig. 2, please refer to fig. 2 and fig. 3.

The hinge device 20 includes: a bracket 21, a synchronizing assembly 22 and at least one hinge group 23, each hinge group 23 comprising two hinge leaves 231.

The hinge plate 231 includes a rotating shaft 2a and a connecting member 2b, the rotating shaft 2a is rotatably connected to the bracket 21, and the connecting member 2b is connected to the rotating shaft 2 a.

The synchronizing assembly 22 is located on the bracket 21, and includes a gear 221 and two rack structures 222, the gear structure 221 is installed on the bracket 21, the two rack structures 222 are respectively movably connected with the rotating shafts 2a of the two hinge pieces 231 in one hinge group 23, and the two rack structures 222 are both engaged with the gear 221.

It should be noted that the bracket 21 is not shown in fig. 3 for clarity of illustration of the synchronizing assembly 22.

To sum up, the hinge means that this application embodiment provided, which comprises a bracket, synchronizing assembly and at least one hinge group, synchronizing assembly wherein includes gear and two rack structure, two rack structure and gear engagement, and respectively with two hinge plate in the hinge group be connected, so alright come the rotation of two hinge plate in step through two rack structure and a gear, overall structure is comparatively simple, synchronizing gear group comes two hinge plate in step through a plurality of gears among the correlation technique has been solved, lead to the great problem of hinge means's volume, realized the volume that can reduce hinge means, and then be favorable to reducing the effect of folding display device's volume.

In addition, the hinge device for realizing synchronous rotation of the two hinge pieces through the plurality of gears has a complex structure, and the plurality of gears are required to be mutually meshed and assembled in the bracket, so that the assembly difficulty is high, and the manufacturing cost is also high. In the hinge device that this application embodiment provided, only can realize the synchronous rotation of two hinge pieces through two rack structure and a gear, simple structure, the hinge device's of being convenient for assembly, and can reduce hinge device's manufacturing cost.

Referring to fig. 2, in an exemplary embodiment, the axis z1 of the gear 221 is perpendicular to the axis z2 of the rotating shaft 2a of the hinge plate 231. The axis z1 of the gear 221 is perpendicular to the paper. With such a structure, the gear 221 is horizontally disposed in the bracket 21, and further, the diameter of the gear 221 does not affect the thickness of the synchronizing assembly (the thickness of the synchronizing assembly may refer to the dimension of the synchronizing assembly in the direction perpendicular to the first surface when the hinge device is in a flat state, and the first surface may be a surface determined by the axes of the rotating shafts of the two hinge pieces), which is beneficial to the miniaturization of the hinge device.

Referring to fig. 2 and 3, in an exemplary embodiment, the rotating shaft 2a includes a rotating member 2a1 and a connecting rod 2a2, the rotating member 2a1 is rotatably connected to the bracket 21 for rotating along the axis of the rotating shaft 2a, and the connecting rod 2a2 is located on the rotating member 2a1 and is not coincident with the axis of the rotating shaft 2 a. In the hinge device shown in fig. 2 and 3, the axis of the rotating shaft 2a may be located outside the rotating member 2a 1.

Referring to fig. 4, which is a left view of the hinge device shown in fig. 2 (for clearly illustrating the connection between the rack structure and the rotating shaft, the gear is not shown in fig. 4, and only one of the two rack structures is shown, wherein the rack structure 222 includes a rack 2c and a stopper 2d located on the rack 2c, the stopper 2d has a strip-shaped groove 2d1 thereon, a connecting rod 2a2 is located in the strip-shaped groove 2d1 of the stopper 2d, the outer diameter of the connecting rod 2a2 matches the width dimension of the strip-shaped groove 2d1, and the included angle between the length direction f1 of the strip-shaped groove 2d1 and the length direction f2 of the rack 2c is greater than zero degrees and less than 180 degrees, in this structure, when the rotating member 2a1 rotates, the connecting rod 2a2 makes a circular motion, and then the connecting rod 2a2 and the strip-shaped groove 2d1 cooperate, the circular motion of the connecting rod 2a2 can be converted into a linear motion along the length direction of the rack 2c, and then should just can promote the gear rather than the meshing along rack 2c to through the rotation of gear drive another rack in the synchronizing assembly, similarly, the bar groove in this another rack can cooperate with the connecting rod of another hinge piece, converts the linear motion of rack 2c in another rack into the circular motion of connecting rod, and drives another hinge piece and rotate.

It should be noted that, when the connecting rod 2a2 is driven by the rotating member 2a1 to make a circular motion, the moving distance in the length direction of the strip-shaped groove 2d1 is smaller than the length of the strip-shaped groove 2d1, so that the rack can be prevented from being driven to move in the length direction of the strip-shaped groove 2d 1.

Alternatively, the length direction f1 of the strip-shaped groove 2d1 is perpendicular to the length direction f2 of the rack 2 c. With such a structure, the rack structure 222 can be moved by the connecting rod 2a2, and the rack structure 222 can be moved for a longer distance along the length direction of the rack 2 c.

Fig. 5 is a schematic structural diagram of another hinge device provided in the embodiments of the present application. Fig. 6 is a perspective view of the hinge device shown in fig. 5. Please refer to fig. 5 and 6. Here, the hinge device 20 includes a first hinge group 1z and a second hinge group 2 z.

The connecting rod 2a2 of the first hinge piece 231a in the first hinge group 1z is integrally formed with the connecting rod 2a2 of the second hinge piece 231b in the second hinge group 2z, and the connecting rod 2a2 of the third hinge piece 231c in the first hinge group 1z is integrally formed with the connecting rod 2a2 of the fourth hinge piece 231d in the second hinge group 2 z.

Fig. 5 and 6 show a hinge device including two hinge sets, and the structure is more stable, when the hinge plate rotates, the force applied to the connecting rod is more balanced, and the two hinge sets can form a stronger connection with other structures, and the firmness of the hinge device is improved.

In an exemplary embodiment, the hinge device may further include more hinge groups. Referring to fig. 7, a schematic structural diagram of another hinge device according to an embodiment of the present application is shown, where the hinge device includes 6 hinge sets, that is, includes 3 structures shown in fig. 5 and 6. Of course, more hinge sets may be included in the hinge device, and the embodiment of the present application does not limit this.

Fig. 8 is an exploded view of a hinge device according to an embodiment of the present disclosure. Fig. 9 is an exploded view of the bracket, gear and two rack structures of the hinge device shown in fig. 8. Fig. 8 shows a structure in which the bracket is close to one side of the support plate. Fig. 9 shows the structure of the other side of the stent. Please refer to fig. 8 and fig. 9.

In an exemplary embodiment, the rotating shaft 2a is located at one side of the bracket 21, and the gear 221 and the racks 2c of the two rack structures 222 are located at the other side of the bracket 21.

As shown in fig. 8 and 9, the bracket 21 has a strip-shaped opening k, and the position-limiting member 2d on the rack structure 222 passes through the strip-shaped opening k, so that the strip-shaped groove 2d1 and the connecting rod 2a2 are located on the same side of the bracket 21. Under such a structure, the two rack structures 222 and the gear 221 as the synchronizing assemblies, and the hinge plates and other structures are respectively located at two sides of the bracket 21, so that the synchronizing assemblies can be prevented from influencing the rotation of the hinge plates, and the influence on the synchronizing assemblies when the hinge plates rotate is also avoided.

Referring to fig. 9, in an exemplary embodiment, the bracket 21 further includes a rack limiting groove 211, when the rack 2c of the rack structure 222 is mounted on the bracket 21, the rack 2c is located in the rack limiting groove 211, and the rack limiting groove 211 is used for limiting the movement of the rack 2c, so that the rack 2c can only move along the length direction of the rack 2 c. The rack stopper groove 211 communicates with the installation position of the gear 221 on the bracket 21 so that the rack 2c can be engaged with the gear 221.

Fig. 10 is a schematic structural diagram of another hinge device provided in the embodiments of the present application. Fig. 10 is a schematic view showing a structure of a hinge device in a flattened state. Fig. 11 is a schematic structural diagram of another hinge device provided in the embodiments of the present application. Fig. 11 shows a structural view of the hinge device in a folded state.

Please refer to fig. 10 and 11. In an exemplary embodiment, the hinge assembly 20 further includes a support block 24 and two support plates 27. The two supporting plates 27 are fixedly connected to the two connecting members 2b, respectively.

When the hinge device 20 is in the flattened state, the two support plates 27 are parallel to each other, and the support block 24 is located on the bracket 21 and between the two support plates 27. The support plate 27 and the support block 24 are used to support the display panel. Specifically, the supporting blocks 24 serve to support the folded region of the display panel between the two supporting blocks 24 such that the folded region is not depressed in a flattened state, and the supporting plates 27 serve to support other regions of the display panel.

Optionally, the hinge device 20 further comprises a linkage 25. The supporting block 24 is movably connected to the bracket 21 and located at the bottom of the bracket 21 when the hinge device 20 is in the folded state, and the link 25 is used to raise the supporting block 24 from the bottom of the bracket 21 and located between the two supporting plates 27 when the hinge device 20 is in the unfolded state. At this time, the supporting block 24 is away from the surface of the bracket and is flush with the surface of the supporting plate 27 away from the bracket, so as to jointly form a relatively flat supporting surface, and the supporting function and the supporting effect on the display panel are improved.

Alternatively, the link 25 includes a protrusion 251 located at a first edge b1 of the back surface m of the support plate 27, the back surface of the support plate 27 is a surface close to the bracket 21 when the hinge device 20 is in the flat state, the first edge b1 is an edge of the support plate 27 opposite to the other support plate 27 of the two support plates, and the protrusion 251 abuts against a side of the support block 24 facing the bracket 21 when the hinge device 20 is in the folded state.

Optionally, the hinge device 20 further comprises an elastic element 26, the elastic element 26 is connected to the support block 24 and the bracket 21, respectively, and when the support block 24 is lifted from the bottom of the bracket 21, the elastic element 26 is in a stretching state.

Referring to fig. 12, fig. 12 is a schematic perspective view of a hinge device according to an embodiment of the present disclosure. In an exemplary embodiment, the two support plates 27 are rectangular, the support block 24 is strip-shaped, and the length of the support block 24 is parallel to two opposite edges of the two support plates 27. With this arrangement, the strip-shaped support block 24 can be exactly complementary to the strip-shaped opening between the two rectangular support plates 27 to form a flat support surface. Illustratively, the gap p between the support block 24 and the support plate 27 ranges from 0.2 mm to 0.5 mm.

At present, in order to reduce the size of the hinge device, the two support plates are usually spaced apart in the flattened state. But the display panel at this spacing is unsupported by a support plate, dishing can occur, and significant distortion can occur when touched by a user.

In the hinge device shown in fig. 9 and 10 of the present application, the supporting block 24 located between the two supporting plates 27 is provided, the supporting block 24 can be retracted into the bracket when the hinge device is in a folded state, and then is lifted from the bracket when the hinge device is in a flattened state, and forms a flat supporting surface together with the supporting plates, so as to support the display panel together with the supporting plates 27, thereby avoiding the problem that the folding area of the display panel is sunken, and further avoiding great deformation when the user touches, and improving the user experience.

In an exemplary embodiment, the support plate 27 is integrally formed with the center frame of the display screen. The middle frame of the display screen is a supporting structure of the display screen and is positioned on the back of the display screen. Under this kind of structure, be convenient for pull down the display screen from hinge means, so alright with display panel separate, be convenient for maintain hinge means or display panel. Wherein, the flatness of the support plate can be +/-50 microns, and the thickness can be 1.2 millimeters.

In the related art display device, a support plate in a hinge device is positioned between a middle frame and a display screen and is fixedly connected to the middle frame. Under this kind of structure, if hinge device or display screen break down, when needing to disassemble hinge device and display screen, can damage the display screen. Thereby making it difficult to maintain the display device. However, in the hinge device provided by the embodiment of the application, the support plate and the middle frame of the display screen are of an integrated structure, so that the disassembly is convenient, and the problems in the related art are solved.

In addition, the hinge device provided in the embodiment of the present application may further include other structures, for example, referring to fig. 8, 10 and 11, the hinge device further includes a damping structure 28, the damping structure 28 may include a torsion mechanism 281 and a connecting rod 282, and in addition, the connecting member 2b may have a strip-shaped limiting groove t. One end of the connecting rod 282 is connected to the torsion mechanism 281, and the other end is assembled in the bar-shaped limit slot t, when the hinge plate of the hinge device rotates, the connecting rod 282 can be driven by the connecting rod 2b to move in the bar-shaped limit slot t, and then the connecting rod 282 can apply a reverse acting force to the connecting rod 2b under the action of the torsion mechanism 281, so as to achieve the damping effect. For example, the torsion mechanism 281 may include a disc spring, a friction plate, or a spring plate structure, which is not limited in the embodiments of the present application. The torsional damping generated by the torsional mechanism 281 can be transmitted to the connecting member 2b by the connecting rod 282, and the connecting member 2b is connected with the supporting plate 27 by a screw, so that the supporting plate 27 can realize a fixing function with certain resistance at various angular positions.

For example, referring to fig. 10, when the hinge device is in a flattened state, one end of the link 282 is located at one end of the bar-shaped limiting groove t. Referring again to fig. 11, when the hinge device is in the folded state, one end of the link 282 is located at the other end of the bar-shaped limiting groove t.

It should be noted that the axis of the torsion mechanism 281 is not coincident with the axis of the hinge plate, so that the torsion mechanism 281 and the hinge plate can rotate synchronously through the structure formed by the strip-shaped limit slot t and the connecting rod 282.

In addition, the hinge device provided in the embodiment of the present application relates to both a flat state and a folded state, for example, the hinge device shown in fig. 2, 3, 4, 5, 6, 7, and 10 may be in the flat state, and the hinge device shown in fig. 11 may be in the folded state. The flat state may be a state in which the two support plates of the hinge device rotate to flatten the display screen connected to the hinge device (the display screen may include a folding area and two areas located at two sides of the folding area, and the flat state of the display screen may be a state in which the two areas of the display screen at two sides of the folding area and the folding area are substantially coplanar), and the folded state may be a state in which the two support plates of the hinge device rotate to fold the display screen connected to the hinge device to a preset shape (the preset shape may be determined by flexibility of the display screen and a maximum rotatable angle of the hinge device).

However, the hinge device provided by the embodiment of the present application may also have other states, for example, a half-folded state between a folded state and a flattened state may be included, and the embodiment of the present application does not limit this.

The hinge device that this application embodiment provided realizes the synchronous rotation of a hinge piece through the synchronizing assembly that two racks and a gear are constituteed, simple structure, the maintenance of being convenient for. In addition, the volume of the hinge device can be reduced.

In the hinge device shown in fig. 1, the thickness of the synchronizing member is determined by the diameter of the gear, which results in that the overall thickness of the synchronizing member is generally large, for example, up to 2.6 mm and more. In the hinge device provided by the embodiment of the application, the gear in the synchronizing assembly is horizontally arranged in the bracket, the thickness of the synchronizing assembly is not influenced, and therefore the thickness of the synchronizing assembly can be smaller, for example, as shown in fig. 10, the thickness h1 can reach 1.75 mm. On the basis, referring to fig. 10, the overall thickness h2 of the hinge device in the flattened state may be small, for example, 6 mm, while in the related art, the overall volume of the synchronization assembly composed of a plurality of gears is large, so that the overall thickness of the hinge device in the flattened state may reach more than 8 mm.

As shown in fig. 11, the virtual center-to-center distance s (which may be the distance between the axes of two hinge plates) of the hinge device provided in the embodiment of the present application can be reduced to 10.9 mm, while the virtual center-to-center distance of the hinge device in the related art can reach more than 13.8 mm.

According to another aspect of the embodiments of the present application, a foldable display device is provided, and the foldable display device includes a display screen assembly and the hinge device.

Optionally, the display screen assembly includes a middle frame and a display screen, the display screen is located on the middle frame, and a support plate in the hinge device is connected with one side of the middle frame away from the display screen. Under this kind of structure, be convenient for pull down the backup pad from the center, not fragile display screen moreover. The effect of easily reworking the foldable display device is realized.

Wherein, the display screen can be a flexible display screen. Illustratively, an Organic Light-Emitting Diode (OLED) display panel may be used.

Referring to fig. 13, fig. 13 is a schematic perspective view of a back surface of a foldable display device according to an embodiment of the present application. Wherein, the supporting plate 27 of the hinge device opener is fixedly connected with the back of the display screen component 31 through a bolt s.

To sum up, the folding display device that this application embodiment provided, including display screen subassembly and hinge means, this hinge means includes the support, synchronizing assembly and at least one hinge group, synchronizing assembly wherein includes gear and two rack structures, two rack structures and gear engagement, and respectively with hinge group in two hinge plates be connected, so alright come the rotation of two hinge plates in step through two rack structures and a gear, overall structure is comparatively simple, synchronizing gear set comes two hinge plates in step through a plurality of gears among the correlation technique has been solved, lead to hinge means's the great problem of volume, realized can reduce hinge means's volume, and then be favorable to reducing the effect of folding display device's volume.

The term "at least one of a and B" in the present application is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist simultaneously, and B exists alone. Similarly, "A, B and at least one of C" indicates that there may be seven relationships that may indicate: the seven cases of existence of A alone, B alone, C alone, A and B together, A and C together, C and B together and A, B and C together exist. Similarly, "A, B, C and at least one of D" indicates that there may be fifteen relationships, which may indicate: fifteen cases of a alone, B alone, C alone, D alone, a and B together, a and C together, a and D together, C and B together, D and B together, C and D together, A, B and C together, A, B and D together, A, C and D together, B, C and D together, A, B, C and D together exist.

In this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hinge device, characterized in that the hinge device comprises: the hinge assembly comprises a bracket, a synchronous assembly and at least one hinge group, wherein the hinge group comprises two hinge pieces;

2. The hinge assembly of claim 1, wherein the shaft includes a rotating member rotatably coupled to the bracket for rotation along an axis of the shaft, and a connecting rod on the rotating member that is not coincident with the axis of the shaft;

3. The hinge device according to claim 2, wherein a longitudinal direction of the strip-shaped groove is perpendicular to a longitudinal direction of the rack.

4. The hinge assembly of claim 2, wherein the shaft is located on one side of the bracket, and the gear and the racks of the two rack gear structures are located on the other side of the bracket;

5. The hinge assembly of claim 2, wherein the hinge assembly comprises a first hinge set and a second hinge set;

6. The hinge assembly of any of claims 1-5, wherein the axis of the gear is perpendicular to the axis of the hinge plate axis of rotation.

7. The hinge assembly of claim 1, further comprising a support block and two support plates;

the two support plates are respectively fixedly connected with the two connecting pieces, when the hinge device is in a flattening state, the two support plates are parallel to each other, and the support blocks are positioned on the support and between the two support plates.

8. The hinge assembly of claim 7, further comprising a linkage;

9. The hinge assembly of claim 8, wherein the linkage member includes a projection at a first edge of a back surface of the support plate, the back surface of the support plate being a surface of the hinge assembly that is adjacent to the bracket when the hinge assembly is in the flattened state, the first edge being an edge of the support plate opposite the other of the two support plates, the projection abutting a side of the support block that faces the bracket when the hinge assembly is in the folded state.

10. The hinge assembly of claim 9, further comprising a spring assembly coupled to the support block and the bracket, respectively, wherein the spring assembly is in tension when the support block is raised from the bottom of the bracket.

11. The hinge device as claimed in claim 7, wherein the two support plates have a rectangular shape, the support block has a strip shape, and a length direction of the support block is parallel to both opposite edges of the two support plates.

12. The hinge assembly of any of claims 7-11, wherein the support plate is integrally formed with the center frame of the display screen.

13. A foldable display device, characterized in that it comprises a display screen assembly and a hinge arrangement according to any of claims 1-12.

14. The foldable display device of claim 13, wherein the display screen assembly comprises a middle frame and a display screen, the display screen is located on the middle frame, and the support plate of the hinge assembly is connected to a side of the middle frame away from the display screen.