CN215186852U - Folding screen device - Google Patents

Abstract

A folding screen device includes a hinge, a housing unit, and a screen unit. The shell unit comprises two shells which are connected with two sides of the hinge in the left-right direction, two joint plates which are respectively arranged on the shells, and a plurality of pairs of screen track pieces which are respectively arranged between the shells and the joint plates. Each housing has a base wall connected to the hinge, and each screen rail member has a rail groove. The screen unit is fixedly arranged on the hinge and movably accommodated in the rail groove. The hinge enables the casing to rotate between an unfolded position where the casing is in an unfolded state and an outer folded position where the base walls of the casing are opposite to each other, and the screen unit is movably accommodated in the rail groove in the process that the casing rotates between the unfolded position and the outer folded position. Therefore, the screen unit is prevented from being damaged by pulling and extruding due to the difference between the inner diameter and the outer diameter of the shell.

Description

Folding screen device

Technical Field

The utility model relates to a screen device especially relates to a foldable screen device.

Background

In recent years, smart phones have become almost one-hand electronic devices, and with the enhancement of performance such as processors and batteries, the speed of replacing the smart phones is not as frequent as when such products are just coming out. In order to bring more freshness to consumers and meet the requirements of large-size screens and convenience in carrying, foldable smart phones are also continuously available in the market. The foldable smart phone can be divided into an inward folding type and an outward folding type, the inward folding type means that the screens of the two parts are folded in the case face to face when the screens are folded into the two parts, and the outward folding type means that the screens of the two parts are folded back to back. The size of the folding-type smart phone is about the size of the existing common smart phone, the consumer can use the folding-type smart phone through direct operation at ordinary times, the folding-type smart phone can be unfolded to improve visual perception when watching films and playing hand games, and the folding-type smart phone is expected by the public. However, in some folding smart phones, the difference between the inside and outside diameters between the screen and the bottom housing is likely to cause the screen to be pulled, and in some folding smart phones, the center of the screen is not supported by the rotating shaft enough after being folded, which may cause the screen to be damaged.

Disclosure of Invention

An object of the utility model is to provide a can solve the foldable screen device of above-mentioned at least one problem.

The utility model discloses a folding screen device comprises a hinge; a housing unit including two housings connected to both side edges of the hinge in a left-right direction, two joint plates respectively disposed at the housings, and a plurality of pairs of screen rail members respectively disposed between the housings and the joint plates, each housing having a base wall connected to the hinge, each screen rail member having a rail groove; and a screen unit fixedly arranged on the hinge and movably accommodated in the rail groove; the hinge can enable the shell to rotate between an unfolding position where the shell is in an unfolding state and an outer folding position where the base walls of the shell face each other, and the screen unit is movably accommodated in the track groove in the process that the shell rotates between the unfolding position and the outer folding position.

Foldable screen device, this screen unit include the flexible formula screen of this hinge of rigid coupling and respectively movably holding in two slides in track groove, this flexible formula screen has the composition surface towards this hinge, the slide rigid coupling just separates each other in this composition surface, and each joint plate forms along this a plurality of screen spouts that left right direction extended, this shell unit still include movably holding in screen spout and respectively the rigid coupling a plurality of screen sliders of slide.

Foldable screen device, each casing still have by the leg that upwards extends of this base wall periphery and by the inward eaves wall of this leg top edge extension, the screen track spare set up respectively in the splice plate reaches the eaves wall just is located the both sides of this screen unit between the part that the direction extended about this along this.

Foldable screen device, this hinge include along the base that the fore-and-aft direction extends, set up in the support module of this base below and set up in the torsion module of the flexible formula screen of this screen unit of this base top and rigid coupling, this support module includes and extends and difference rigid coupling along this fore-and-aft direction the joint plate just can be for two interlock supports of this base pivoted.

Foldable screen device, this torsion module include along this fore-and-aft direction extend and set up in two outer support unit at this base both ends, extend along this fore-and-aft direction and set up in the interior support unit of this base and set up in at least a pair of torsion piece unit between outer support unit and this interior support unit, each outer support unit has the central outer support tube of this base of rigid coupling, is located two first outer support tubes of this central outer support tube both sides and pivot respectively locate two second outer support tubes of first outer support tube, each interior support unit has the central interior support tube of this base of rigid coupling, is located two first interior support tubes of this central inner support tube both sides and pivot respectively locate two second interior support tubes of first interior support tube, each torsion piece unit has a plurality of torsion piece groups of staggered arrangement and wears to establish in this fore-and aft direction torsion piece group, The outer support unit and the inner support unit are connected through a plurality of connecting shafts, each torsion sheet group is provided with a plurality of torsion sheets and a side connecting block connected with the torsion sheets, the torsion sheets are arranged in a stacked mode in the front-back direction and are abutted against each other in the left-right direction to form three rows, each torsion sheet is used for two connecting shafts to penetrate through, tooth parts are formed on two sides of each torsion sheet, the torsion sheets in each row can be meshed with each other to pivot relatively, and the side connecting block is provided with a gear part meshed with one end of each torsion sheet group.

Foldable screen device, each interlock support have the bottom plate and connect this bottom plate both sides and along this two curb plates of controlling the direction extension, this support module is still including setting up in this base both ends and connecting respectively and correspond two synchronous units of curb plate, make the interlock support can rotate for this base is synchronous.

Foldable screen device, this base accept the piece including being rectangular form connecting strip and connecting two at this connecting strip both ends, each synchronization unit has rotationally to set up in should accept the piece and the rigid coupling corresponds respectively two interlock pieces of curb plate and rotationally set up and to accept the piece and mesh each other and be located two synchronizing gear between the interlock piece, each interlock piece has the interlock gear portion that meshes in this synchronizing gear, wears to establish the interlock axial region of this curb plate fixedly and wears to establish the installation axial region of this acceping piece, can drive this interlock piece rotation that corresponds when one of them linkage support rotates for this base, and passes through another interlock piece of synchronizing gear interlock rotates, makes the linkage support can synchronous rotation.

Foldable screen device, each accept the piece and form the recess respectively at the both ends of this left right direction, each curb plate is the L type and forms the card that extends about this in the direction and supports the movable groove, this support module still including respectively movably set up in the curb plate just along should control four cards that the direction extends support the piece and set up in the card support the piece reaches four cards between the curb plate support the elastic component, each card support a movably holding in this card that corresponds support the movable groove and support and accept the piece that should correspond, just the casing can be supported the elastic force promotion of elastic component and support in this recess that corresponds with the card by this card when this expansion position.

Foldable screen device, this torque force module still include the rigid coupling two collateral branch faggings that the side connection piece just extends along this fore-and-aft direction, each interlock support still has this bottom plate of rigid coupling and forms a pair of interlock piece at least in interlock groove respectively, each torque piece unit still has and wears to establish respectively fixedly the side connection piece and correspond the interlock support a pair of side interlock axle in the interlock groove of interlock piece makes can even take during the rotation of interlock support the fagging the side connection piece reaches the torque piece rotates.

Foldable screen device, this screen unit still include respectively the rigid coupling in at least a pair of pushing away of slide supports the piece, each joint plate formation position should push away at least one of piece and support the activity groove, the bottom plate of each interlock support forms at least one and pushes away the dog, this support module still include movably set up in push away to the dog and extend and support along this left and right sides direction push away at least a pair of pushing away of piece and set up in push away to the piece and push away to at least a pair of pushing away between the dog and support the elastic component, just the casing is when this expandes the position, push away to the elastic force that the piece can receive this pushing away to the elastic component and promote push away the piece and drive the slide is kept away from respectively the interlock support removes.

The foldable screen device, this hinge enables the casing should expand the position, should fold the position outward and the joint plate rotates within a definite time in folding position in opposite directions each other, the casing should expand the position, should fold the position and should fold the in-process pivoted between the position outward, this screen unit be activity holding in the track groove.

The beneficial effects of the utility model reside in that: the screen unit can be movably accommodated in the track groove of the screen track piece, when the shell is changed between the unfolding position of the shell in the unfolding state and the outer folding position of the base wall of the shell opposite to each other, the screen unit can move relative to the shell, and the screen unit is prevented from being damaged due to pulling and extrusion caused by the difference of the inner diameter and the outer diameter of the shell.

Drawings

Fig. 1 is a perspective view of an embodiment of a foldable screen device according to the present invention;

FIG. 2 is an exploded perspective view of the embodiment;

FIG. 3 is a top view of a housing unit of the embodiment;

FIG. 4 is a cross-sectional view taken along section line IX-IX of FIG. 3;

FIG. 5 is a side view of the housing unit of the embodiment;

FIG. 6 is a fragmentary cross-sectional view taken along section line XI-XI of FIG. 1;

FIG. 7 is a perspective view of a screen unit of the embodiment;

FIG. 8 is an exploded perspective view of a hinge of this embodiment;

FIG. 8A is a partial enlarged view of FIG. 8;

FIG. 9 is an exploded perspective view of a torsion module of the hinge of the present embodiment;

FIG. 9A is a partial enlarged view of FIG. 9;

FIG. 10 is a front view of the torque module of the hinge of the embodiment;

FIG. 11 is a perspective view of the embodiment illustrating the housing in an inwardly folded position;

FIG. 12 is a perspective view of a portion of the embodiment, illustrating the housing in an outer folded position, with the screen unit omitted;

FIG. 13 is a fragmentary perspective view of the torque module of the hinge of the embodiment illustrating the torque module in the housing in the folded-in position;

fig. 14 is a front view of the torque module of the hinge of the embodiment, illustrating the state of the torque module in the housing in the folded-in position;

FIG. 15 is a front view of the torque module and a bracket module of the hinge of the embodiment, illustrating the torque module and the bracket module in the folded-in position of the housing;

FIG. 16 is a front view of the torque module and the bracket module of the hinge of the embodiment, illustrating the torque module and the bracket module in the deployed position of the housing;

fig. 17 is a partial front view of the torque module and a bracket module of the hinge of the embodiment, illustrating the engaging member engaging in the groove of the receiving block, wherein the linking bracket is omitted;

FIG. 18 is a fragmentary perspective view of the torque module of the hinge of the embodiment illustrating the torque module in the housing in the folded out position;

FIG. 19 is a front view of the torque module of the hinge of the embodiment, illustrating the torque module in the housing in the folded out position; and

fig. 20 is a front view of the torque module and the bracket module of the hinge of the embodiment, illustrating a state in which the torque module and the bracket module are in the folded-out position of the housing.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1 and 2, an embodiment of the foldable screen device 100 of the present invention includes a hinge 10, a housing unit 1 and a screen unit 2.

Referring to fig. 3 to 6, the housing unit 1 includes two housings 11 connected to both sides of the hinge 10 in a left-right direction D2, two joint plates 12 respectively disposed on the housings 11, a plurality of screen sliders 13 movably disposed on the joint plates 12, and a plurality of pairs of screen rail members 14 respectively disposed between the housings 11 and the joint plates 12. Each housing 11 has a base wall 111 connected to the hinge 10, a surrounding wall 112 extending upward from the periphery of the base wall 111, and a brim wall 113 extending inward from the top edge of the surrounding wall 112. Each of the joint plates 12 is spaced from the base wall 111 and the eave wall 113 of the housing 11 in a vertical direction D3, and forms a plurality of screen sliding slots 121 extending along the left-right direction D2, two pushing moving slots 122 extending along the left-right direction D2 and spaced from the screen sliding slots 121, and a plurality of circular through holes 123. The screen sliding block 13 is movably accommodated in the screen sliding groove 121 and is respectively and fixedly connected with the screen unit 2. The joint plate 12, the surrounding wall 112 and the cornice 113 define an active space S for movably accommodating the screen unit 2. The screen rail 14 has a rail groove 141 and is disposed between the joint plate 12 and the portion of the eaves wall 113 extending in the left-right direction D2, on both sides of the screen unit 2, and in the space S.

Referring to fig. 2, 6 and 7, the screen unit 2 is fixedly disposed on the hinge 10 and movably received in the rail groove 141, and includes a flexible screen 21 fixedly connected to the hinge 10, two sliding plates 22 respectively and movably received in the rail grooves 141 of the screen rail 14, a plurality of positioning ribs 23 arranged and fixedly connected to a center of a joint surface 211 of the flexible screen 21 facing the hinge 10 along a front-back direction D1, four pushing blocks 24 fixedly connected to the sliding plates 22 and movably received in the pushing movable grooves 122, and a plurality of joint posts 25 fixedly connected to the sliding plates 22 and extending toward the joint plate 12. The sliding plate 22 is fixed to the screen slider 13 by the joint post 25. The number of the screen sliding block 13, the screen sliding groove 121, the positioning rib 23, the abutting block 24, the abutting movable groove 122, and the engaging column 25 is not limited to the number shown in this embodiment, and may be adjusted as appropriate in other embodiments.

Referring to fig. 2 and 8, the hinge 10 includes a base 3 extending along the front-back direction D1, a bracket module 5 disposed below the base 3, a torsion module 4 disposed above the base 3 and fixedly connected to the flexible screen 21 of the screen unit 2, and a covering member 6 disposed below the bracket module 5. The base 3 includes a strip-shaped connecting bar 31 and two receiving blocks 32 connected to two ends of the connecting bar 31, and each receiving block 32 has a groove 321 formed at two ends in the left-right direction.

Referring to fig. 8 to 10, the torsion module 4 includes two outer supporting units 41 extending along the front-back direction D1 and disposed at two ends of the base 3, two middle supporting units 42 extending along the front-back direction D1 and disposed on the base 3, an inner supporting unit 43 extending along the front-back direction D1 and disposed on the base 3, two pairs of torsion sheet units 44 disposed between the outer supporting units 41 and the inner supporting units 43, and two side supporting plates 45 extending along the front-back direction D1 and disposed at two sides to abut against the screen unit 2. Each outer support unit 41 has a central outer support tube 411 fixedly connected to the base 3, two first outer support tubes 412 located at two sides of the central outer support tube 411, and two second outer support tubes 413 respectively pivoted to the first outer support tubes 412. Each middle support unit 42 is located between two torsion bar units 44, and has a central middle support tube 421 fixedly connected to the base 3, two first middle support tubes 422 located at two sides of the central middle support tube 421, and two second middle support tubes 423 pivotally installed on the first middle support tubes 422, respectively. Each inner support unit 43 has a central inner support tube 431 fixedly connected to the base 3, two first inner support tubes 432 located at two sides of the central inner support tube 431, and two second inner support tubes 433 pivotally installed on the first inner support tubes 432, respectively. The components of the outer support unit 41, the middle support unit 42 and the inner support unit 43 are substantially different in length and all extend along the front-rear direction D1 on the same straight line. The positioning ribs 23 of the screen unit 2 are respectively inserted into the central outer supporting tube 411, the central middle supporting tube 421 and the central inner supporting tube 431, so that the flexible screen 21 is fixedly connected to the torsion module 4.

Each torsion plate unit 44 has a plurality of torsion plate sets arranged alternately in the front-back direction D1 and a plurality of connecting shafts 443 penetrating through the torsion plate sets. The connecting shafts 443 of the two torsion bar units 44 closer to the outer supporting unit 41 penetrate through the torsion bar set, the outer supporting unit 41 and the middle supporting unit 42, and the connecting shafts 443 of the two torsion bar units 44 closer to the inner supporting unit 43 penetrate through the torsion bar set, the inner supporting unit 43 and the middle supporting unit 42, so that the outer supporting unit 41, the middle supporting unit 42, the inner supporting unit 43 and the torsion bar units 44 can rotate synchronously. Each torsion piece set includes a plurality of torsion pieces 441 and a side connection block 442 connected to the torsion pieces 441 and fixedly connected to the side support plate 45, the torsion pieces 441 are stacked in the front-rear direction D1 and abut against each other in three rows in the left-right direction D2, the number of stacks in the front-rear direction D1 depends on the thickness of the side connection block 442 in the front-rear direction D1, and is four layers in the embodiment, but not limited thereto. Each torsion piece 441 is penetrated by two connecting shafts 443 and has teeth 441a formed at both sides thereof so that the respective rows of torsion pieces 441 can be engaged with each other to pivot relatively, and the side connecting block 442 has a gear portion 442a engageable with one end of the torsion piece group.

Referring to fig. 2, 8 and 8A, the bracket module 5 includes two linking brackets 51 extending along the front-back direction D1 and respectively fixed to the joint plate 12 and capable of rotating relative to the base 3, and two synchronization units 52 disposed at two ends of the base 3. Each linking bracket 51 has a bottom plate 511, two side plates 512 connecting two sides of the bottom plate 511 and extending along the left-right direction D2, and four linking blocks 513 fixed to the bottom plate 511 and respectively forming a linking groove 513 a. The bottom plate 511 forms four sliding grooves 511a extending along the left-right direction D2, eight protruding columns 511b and two pushing stoppers 511 c. The linking bracket 51 is fixed to the joint plate 12 by the protruding pillar 511b penetrating through the corresponding through hole 123 of the joint plate 12. Each side plate 512 is L-shaped and forms a locking moving slot 512a extending in the left-right direction D2. Each torsion bar unit 44 further has a pair of side coupling shafts 444 respectively fixedly inserted into the side connecting blocks 442 and the coupling grooves 513a of the coupling blocks 513 of the coupling bracket 51, so that the coupling bracket 51 rotates with the side supporting plates 45, the side connecting blocks 442 and the torsion bars 441, and the side coupling shafts 444 movably inserted into the coupling grooves 513 a. Each synchronizing unit 52 has two linking members 521 rotatably disposed on the accommodating block 32 and fixedly connected to the corresponding side plates 512 respectively, and two synchronizing gears 522 rotatably disposed between the accommodating block 32 and meshed with each other, each linking member 521 has a linking gear portion 521a meshed with the synchronizing gear 522, a linking shaft portion 521b fixedly penetrating the side plates 512, and an installation shaft portion 521c penetrating the accommodating block 32, wherein when one linking bracket 51 rotates relative to the base 3, the corresponding linking member 521 can be driven to rotate, and the synchronizing gear 522 links the other linking member 521 to rotate, so that the linking brackets 51 can rotate synchronously.

The bracket module 5 further includes two pairs of pushing and abutting members 53 movably disposed between the pushing and abutting blocks 511c and extending along the left-right direction D2 and abutting against the pushing and abutting blocks 24, two pairs of pushing and abutting elastic members 54 disposed between the pushing and abutting members 53 and the pushing and abutting blocks 511c, four clamping and abutting members 55 movably disposed on the side plates 512 and extending along the left-right direction D2, four clamping and abutting elastic members 56 disposed between the clamping and abutting members 55 and the side plates 512, and four sliding blocks 57 movably accommodated in the sliding grooves 511 a. Each of the engaging members 55 is movably received in the corresponding engaging moving slot 512a and abuts against the corresponding receiving block 32. The covering member 6 is adapted to cover the bracket module 5 and the base 3, and can slide relative to the linking bracket 51 by fixing the sliding block 57.

Referring to fig. 1, 11 and 12, the hinge 10 enables the housing 11 to rotate between an inner folded position where the joint plates 12 face each other, an unfolded position where the housing 11 is unfolded, and an outer folded position where the base walls 111 of the housing 11 face each other, that is, the foldable screen device 100 can be unfolded from 0 degree to 180 degrees or even 360 degrees. The housing 11 rotates between the inner folding position and the unfolding position, and the screen unit 2 is movably received in the rail groove 141 during the rotation between the unfolding position and the outer folding position.

Referring to fig. 2, 13 to 15, in the inner folding position, the surfaces of the supporting tubes of the side supporting plates 45, the outer supporting unit 41, the middle supporting unit 42 and the inner supporting unit 43 together define a space like a droplet, which is enough for the screen unit 2 to be accommodated without excessively bending or pressing the screen unit 2. Referring to fig. 1, 8, 10, 16 and 17, when the foldable position is switched to the unfolded position, the housing 11 and the linking bracket 51 rotate downward to drive the engaging member 55 to move along the outer surface of the accommodating block 32 and finally to be pushed by the elastic force of the engaging elastic member 56 to engage with the corresponding groove 321, so as to provide a locking hand feeling to prevent the housing 11 from being separated from the unfolded position by a slight external force, which is convenient for the user to view. Meanwhile, the pushing-against piece 53 is also pushed by the elastic force of the pushing-against elastic piece 54 to push the pushing-against block 24 and drive the sliding plate 22 to move away from the linking bracket 51, respectively, so as to provide an outward pulling force to the flexible screen 21, and enable the flexible screen 21 to quickly approach to a flat state. Referring to fig. 2, 18 to 20, when the unfolded position is converted to the folded position, the first outer support tubes 412 of the outer support units 41 are pivoted downward relative to the central outer support tube 411 and the second outer support tubes 413 are respectively pivoted downward relative to the first outer support tubes 412, the first middle support tubes 422 of the middle support units 42 are pivoted downward relative to the central middle support tube 421 and the second middle support tubes 423 are respectively pivoted downward relative to the first middle support tubes 422, the first inner support tubes 432 of the inner support units 43 are pivoted downward relative to the central inner support tubes 431 and the second inner support tubes 433 are respectively pivoted downward relative to the first inner support tubes 432, and torsion generated when the torsion bar units 44 are closely stacked to each other during rotation can stably maintain the housing 11 at the folded position, at this time, the surfaces of the supporting tubes of the outer supporting unit 41, the middle supporting unit 42 and the inner supporting unit 43 together form a semi-circular supporting surface to support the screen unit 2, and the flexible screen 21 can closely adhere to the supporting surface without being damaged by the extrusion deformation because the screen unit 2 moves relative to the housing 11. Referring to fig. 2, 13 to 15 again, similarly, after the foldable screen device 100 is used, the user can fold the housing 11 to make the housing 11 shift to the folded position, and shift from the unfolded position to the folded position, the first outer support tubes 412 of the outer support units 41 pivot upward relative to the central outer support tubes 411 and the second outer support tubes 413 respectively pivot upward relative to the first outer support tubes 412, the first middle support tubes 422 of the middle support units 42 pivot upward relative to the central middle support tubes 421 and the second middle support tubes 423 pivot upward relative to the first middle support tubes 422 respectively, the first inner support tubes 432 of the inner support units 43 pivot upward relative to the central inner support tubes 431 and the second inner support tubes 433 pivot upward relative to the first inner support tubes 432 respectively, and the torsion force generated when the torsion sheet units 44 are closely stacked to each other and rotated can also firmly maintain the housing 11 at the inward folded position, at which the screen unit 2 is accommodated in the aforementioned drop-shaped space without excessively bending the screen unit 2 to cause damage.

To sum up, the utility model discloses foldable screen device 100 borrow by this screen unit 2 slide 22 movably holding in the track groove 141 of screen track spare 14, casing 11 is in this expansion position that casing 11 is expansion state with when changeing between this outer folding position that base wall 111 of casing 11 is in opposite directions each other, this screen unit 2 can for casing 11 activity avoids this screen unit 2 because of the inside and outside diameter difference that casing 11 produced to cause drags the extrusion and then damages, so can reach the purpose of the utility model with low costs really.

However, the above embodiments are only examples of the present invention, and the scope of the present invention should not be limited thereto, and all the simple equivalent changes and modifications made according to the claims and the patent specification of the present invention are still included in the scope of the present invention.

Claims (11)

1. A foldable screen device, the foldable screen device comprising:

a hinge;

a housing unit including two housings connected to both side edges of the hinge in a left-right direction, two joint plates respectively disposed at the housings, and a plurality of pairs of screen rail members respectively disposed between the housings and the joint plates, each housing having a base wall connected to the hinge, each screen rail member having a rail groove; and

the screen unit is fixedly arranged on the hinge and movably accommodated in the rail groove;

the hinge can enable the shell to rotate between an unfolding position where the shell is in an unfolding state and an outer folding position where the base walls of the shell face each other, and the screen unit is movably accommodated in the track groove in the process that the shell rotates between the unfolding position and the outer folding position.

2. The folding screen device of claim 1, wherein: the screen unit comprises a flexible screen fixedly connected with the hinge and two sliding plates respectively and movably accommodated in the rail grooves, the flexible screen is provided with a joint surface facing the hinge, the sliding plates are fixedly connected with the joint surface and are spaced from each other, each joint plate forms a plurality of screen sliding grooves extending along the left-right direction, and the shell unit also comprises a plurality of screen sliding blocks movably accommodated in the screen sliding grooves and respectively and fixedly connected with the sliding plates.

3. The folding screen device of claim 2, wherein: each casing also has a surrounding wall extending upwards from the periphery of the base wall and an eaves wall extending inwards from the top edge of the surrounding wall, and the screen track pieces are respectively arranged between the joint plate and the eaves wall extending along the left-right direction and positioned at two sides of the screen unit.

4. The folding screen device of claim 2, wherein: the hinge comprises a base extending along the front-back direction, a support module arranged below the base and a torsion module arranged above the base and fixedly connected with the flexible screen of the screen unit, wherein the support module comprises two linkage supports extending along the front-back direction, fixedly connected with the joint plate respectively and capable of rotating relative to the base.

5. The folding screen device of claim 4, wherein: the torsion module comprises two outer supporting units which extend along the front-back direction and are arranged at two ends of the base, an inner supporting unit which extends along the front-back direction and is arranged on the base, and at least one pair of torsion sheet units which are arranged between the outer supporting units and the inner supporting unit, each outer supporting unit is provided with a central outer supporting pipe fixedly connected with the base, two first outer supporting pipes positioned at two sides of the central outer supporting pipe and two second outer supporting pipes respectively pivoted on the first outer supporting pipes, each inner supporting unit is provided with a central inner supporting pipe fixedly connected with the base, two first inner supporting pipes positioned at two sides of the central inner supporting pipe and two second inner supporting pipes respectively pivoted on the first inner supporting pipes, each torsion sheet unit is provided with a plurality of torsion sheet groups which are staggered in the front-back direction and a plurality of connecting shafts through which the torsion sheet groups, the outer supporting units and the inner supporting units are arranged, each torsion piece group is provided with a plurality of torsion pieces and a side connecting block connected with the torsion pieces, the torsion pieces are arranged in a stacking mode in the front-back direction and abut against each other in the left-right direction to form three rows, each torsion piece is used for two connecting shafts to penetrate through, tooth parts are formed on two sides of each torsion piece, the torsion pieces in each row can be meshed with each other to pivot relatively, and the side connecting block is provided with a gear part meshed with one end of the torsion piece group.

6. The folding screen device of claim 5, wherein: each linkage support is provided with a bottom plate and two side plates which are connected with the two sides of the bottom plate and extend along the left-right direction, and the support module further comprises two synchronous units which are arranged at the two ends of the base and are respectively connected with the corresponding side plates, so that the linkage supports can synchronously rotate relative to the base.

7. The folding screen device of claim 6, wherein: the base comprises a strip-shaped connecting strip and two containing blocks connected with the two ends of the connecting strip, each synchronizing unit is provided with two linkage pieces which are rotatably arranged on the containing blocks and are fixedly connected with the corresponding side plates respectively and two synchronizing gears which are rotatably arranged on the containing blocks and are meshed with each other and positioned between the linkage pieces, each linkage piece is provided with a linkage gear part meshed with the synchronizing gear, a linkage shaft part fixedly penetrating through the side plates and an installation shaft part penetrating through the containing blocks, one linkage support can drive the corresponding linkage piece to rotate when rotating relative to the base, and the other linkage piece is linked to rotate through the synchronizing gears, so that the linkage supports can synchronously rotate.

8. The folding screen device of claim 7, wherein: the support module further comprises four clamping and abutting pieces which are movably arranged on the side plates respectively and extend along the left-right direction and four clamping and abutting elastic pieces arranged between the clamping and abutting pieces and the side plates, each clamping and abutting piece is movably accommodated in the corresponding clamping and abutting movable groove and abuts against the corresponding accommodating block, and the shell can be pushed by the elastic force of the clamping and abutting elastic pieces to be clamped and abutted against the corresponding groove when in the unfolding position.

9. The folding screen device of claim 7, wherein: the torsion module also comprises two side supporting plates fixedly connected with the side connecting blocks and extending along the front-back direction, each linkage support is also provided with at least one pair of linkage blocks fixedly connected with the bottom plate and respectively forming linkage grooves, and each torsion sheet unit is also provided with a pair of side linkage shafts respectively fixedly penetrating through the side connecting blocks and the linkage grooves of the linkage blocks of the linkage support correspondingly, so that the linkage support can be connected with the side supporting plates, the side connecting blocks and the torsion sheets to rotate when rotating.

10. The folding screen device of claim 7, wherein: the screen unit also comprises at least one pair of pushing and abutting blocks fixedly connected with the sliding plate respectively, each joint plate forms at least one pushing and abutting movable groove corresponding to the pushing and abutting blocks, a bottom plate of each linkage support forms at least one pushing and abutting stop block, the support module also comprises at least one pair of pushing and abutting pieces movably arranged on the pushing and abutting stop blocks and extending along the left-right direction and abutting against the pushing and abutting blocks and at least one pair of pushing and abutting elastic pieces arranged between the pushing and abutting pieces and the pushing and abutting stop blocks, and when the casing is at the unfolding position, the pushing and abutting pieces can push the pushing and abutting blocks by the elastic force of the pushing and abutting elastic pieces to drive the sliding plate to move away from the linkage support respectively.

11. The folding screen device of claim 1, wherein: the hinge enables the casing to rotate among the unfolding position, the outer folding position and the inner folding position where the joint plates face each other, and the screen unit is movably accommodated in the track groove in the process of rotating the casing among the unfolding position, the inner folding position and the outer folding position.

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