Folding type 3D expansion display device and use method thereof

Abstract

The invention relates to the technical field of 3D display, in particular to a folding type 3D expansion display device and a using method thereof.The folding type 3D expansion display device comprises a fixing plate, a 3D display screen is arranged in the fixing plate, and a storage assembly is arranged at the position, corresponding to the 3D display screen, of the fixing plate; the connecting assemblies are used for connecting two adjacent groups of fixing plates, and each connecting assembly comprises a hinged plate; the protection assembly is used for protecting the 3D display screen, and the protection assembly comprises a flexible baffle; the device has the beneficial effects that D expansion display can be used by fixing multiple groups of fixing plates at designated positions, when the device is folded, the fixing plates are detached, then shifting blocks are shifted, the shifting blocks drive abutting blocks to move out of third storage grooves through first pull ropes, meanwhile, elastically-arranged limiting blocks move out of first limiting grooves, at the moment, every two adjacent groups of fixing plates are hinged, and the fixing plates are folded. A hydraulic cylinder and a supporting steel frame are not needed, the occupied space is small, operation is easy and convenient, and maintenance is easy.

Description

Technical Field

[0001] The present invention relates to the field of 3D display technology, and in particular to a foldable 3D expansion display device and a method for using the same. Background Art

[0002] A 3D display device is a display device that generates stereoscopic vision by simulating binocular parallax; In some commercial performances such as street performances, the performance venue is not fixed, and it is time-consuming and labor-intensive to temporarily build a background display screen on site. In the prior art, the Chinese utility model with the announcement number CN221300608U discloses a foldable display screen and a naked-eye 3D expansion display screen. The foldable display screen consists of a base, a supporting steel frame, a hydraulic device, an electromechanical device, a first segmented screen, a second segmented screen, and a third segmented screen. A three-segment screen support frame is provided on the upper part of the base. Each screen support frame is connected by a hydraulic cylinder. The three-segment screen can fold in sequence, so that the foldable display screen can be quickly unfolded to form a large display screen. It also has the function of folding and storing when it is no longer used. The naked-eye 3D expansion display screen includes two of the aforementioned foldable display screens and a ground rail, one of which has a foldable display screen base fixed to the main structure of the podium to maximize the safety of the foldable screen, and the other foldable display screen can slide on the ground rail to change its position according to actual location requirements. The naked-eye 3D expansion display screen is arranged on the top of the existing naked-eye 3D screen to expand it and can be folded and stored when it is not needed. In the above technology, the folding and unfolding of the 3D expansion display device is achieved through the deformation coordination of the hydraulic cylinder and the supporting steel frame. However, the hydraulic cylinder and the supporting steel frame both require a large space for deformation when folding and unfolding. In some places with small spaces, the above foldable display screen cannot be unfolded. Summary of the Invention

[0003] The object of the present invention is to provide a foldable 3D expansion display device and a method of using the same to solve the problems raised by the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A foldable 3D expansion display device and a method of using the same, comprising: A fixed plate, wherein a 3D display screen is disposed inside the fixed plate, and a storage component is disposed at a position of the fixed plate corresponding to the 3D display screen for storing the 3D display screen, wherein the storage component includes a storage plate; A connecting assembly, used to connect two adjacent groups of fixing plates to achieve unfolding, fixing or folding of the two adjacent groups of fixing plates, the connecting assembly comprising a hinged plate; A protective component is used to protect the 3D display screen, and the protective component includes a flexible baffle.

[0005] Furthermore, a recessed groove is provided at the center of the end surface of the fixing plate, and the storage plate is arranged inside the recessed groove; A first receiving groove is provided at the center of the end surface of the storage plate, and the 3D display screen is installed inside the first receiving groove.

[0006] Furthermore, a plurality of sets of spaced-apart third return springs are provided between the lower end of the storage plate and the inner bottom end of the sink, and the storage plate is elastically arranged inside the sink by the plurality of sets of the third return springs; Guide blocks are installed on both side walls of the storage plate, and guide grooves are opened on the inner side walls of the sink corresponding to the positions of the two groups of guide blocks. The guide blocks are slidably arranged inside the guide grooves.

[0007] Furthermore, the side walls of both sides of the fixed plate are respectively provided with a first connecting groove and a second connecting groove, the hinge plate is arranged between the adjacent first connecting groove and the second connecting groove, and the first connecting groove and the second connecting groove are both provided with a second clearance groove at positions corresponding to the hinge plate; Two sets of symmetrically distributed insertion rods are provided at both ends of the hinged plate, and a countersunk hole is opened at the inner top of the first connecting groove corresponding to the position of the insertion rod, and the insertion rod is rotatably inserted into the inner part of the countersunk hole; A first paving groove is provided at the inner top end of the second connecting groove corresponding to the position of another group of the insertion rods, and the insertion rods are slidably arranged inside the first paving groove.

[0008] Furthermore, a third receiving groove is formed at the end of the insertion rod, a fourth receiving groove is formed at the inner top end of the first giving way groove corresponding to the position of the third receiving groove, a supporting block is inserted into the inner part of the fourth receiving groove, and a second return spring is provided between the end of the supporting block and the inner top end of the fourth receiving groove; A groove is provided on the side wall of the fixing plate at a position corresponding to the position of the supporting block, a shift block is slidably provided inside the groove, and a through hole is provided between the interior of the groove and the interior of the fourth receiving slot, a first pull rope is provided inside the through hole, and both ends of the first pull rope are respectively connected to the end of the shift block and the end of the supporting block.

[0009] Furthermore, an extrusion block is inserted and installed in the interior of the third receiving groove at a position corresponding to the abutting block, and a second air bag is provided between the end of the extrusion block and the inner wall of the third receiving groove; A second receiving groove is formed at the end of the other group of insertion rods, a limiting block is provided inside the second receiving groove, and a first return spring is provided between the end of the limiting block and the inner wall of the second receiving groove, and a first limiting groove is formed on the inner wall of the countersunk hole at a position corresponding to the limiting block; A first airbag is provided between the end of the limiting block and the inner wall of the second receiving groove, and a first exhaust pipe is provided between the first airbag and the second airbag.

[0010] Furthermore, a fifth receiving slot is provided inside the fixing plate at a position corresponding to the 3D display screen, and a flexible baffle is provided inside the fifth receiving slot; A second limiting groove is provided inside the fixed plate at a position corresponding to the flexible baffle, and a guide plate is slidably provided inside the second limiting groove; A fourth return spring is provided between the end of the guide plate and the inner side wall of the second limiting groove, and the guide plate is elastically connected to the fixing plate through the fourth return spring.

[0011] Furthermore, a third air bag is provided between the lower end of the storage plate and the inner bottom end of the sink; A fourth airbag is provided between the other end portion of the guide plate and the inner side wall of the second limiting groove, and a second exhaust pipe is provided between the fourth airbag and the third airbag.

[0012] Furthermore, a fifth airbag is provided between the lower end portion of the guide block and the inner bottom end of the guide groove; A sixth receiving groove is formed on the inner side wall of the first relief groove at a position corresponding to the insertion rod, an extrusion plate is inserted into the inner side of the sixth receiving groove, and a sixth air bag is provided between the inner wall of the sixth receiving groove and the end of the extrusion plate; A third exhaust duct is provided between the sixth airbag and the fifth airbag.

[0013] Furthermore, the method of use includes: Deployment of the 3D expansion display device: two adjacent groups of fixed plates are connected by a hinge plate. When in use, one of the groups of fixed plates is flipped over so that the two adjacent groups of fixed plates are laid flat. After laying flat, the two groups of fixed plates are close to each other. At this time, the hinge plate will move toward the inside of the second connecting groove. When the elastically arranged abutting block is inserted into the inside of the third receiving groove, the hinge plate is fixedly connected to one group of fixed plates. At the same time, the elastically arranged abutting block presses the extrusion block downward, and the extrusion block compresses the second airbag. The gas inside the second airbag is discharged into the inside of the first airbag through the first exhaust pipe. The first airbag expands, causing the limiting block to be inserted into the inside of the first limiting groove, thereby achieving a fixed connection between the hinge plate and the other group of fixed plates, and thus the two groups of fixed plates are fixedly connected. Extension of the 3D display device: When the hinged plate moves toward the second connection slot, the insertion rod squeezes the extrusion plate. At this time, the gas inside the sixth airbag on one side of the extrusion plate is discharged into the fifth airbag through the third exhaust pipe. The fifth airbag inflates, driving the storage plate upward through the guide block, thereby extending the 3D display screen. Contraction of the protective assembly: When the storage plate rises, the third airbag is no longer compressed. At this time, the guide plate moves under the action of the fourth return spring, and the flexible baffle is stored in the interior of the fifth storage groove; Folding of the 3D expansion display device: Move the shift block, and the shift block drives the supporting block to move out from the inside of the third storage slot through the first pull rope. At the same time, the elastically set limit block moves out from the inside of the first limit slot. At this time, the two adjacent groups of fixed plates are hinged, and then one group of fixed plates is flipped closer to the other group of fixed plates to achieve folding.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Fix multiple sets of fixing plates in the designated position to use the D-type expansion display. To fold, remove the fixing plates and then move the shift block. The shift block drives the supporting block out of the third storage slot through the first pull rope. At the same time, the elastic limit block moves out of the first limit slot. At this time, the two adjacent sets of fixing plates are hinged. Then, flip one set of fixing plates closer to the other set of fixing plates to achieve folding. No hydraulic cylinders or supporting steel frames are required, which takes up little space and is easy to operate and maintain. 2. When the fixed plate is folded, the insertion rod no longer presses the extrusion plate. At this time, the storage plate moves downward under the action of the third return spring, so that the end surface of the D display is lower than the end surface of the fixed plate, thereby protecting the end surface of the D display; 3. As the storage tray moves downward, the gas inside the third airbag is compressed. This gas is then discharged into the fourth airbag through the second exhaust duct. The fourth airbag expands, pushing the guide plate along the second limit groove. As the guide plate moves, it drives the flexible baffle to cover the upper end of the D display, further protecting the D display. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a partial cross-sectional schematic diagram of the three-dimensional structure of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure at center A; Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the structure at point C in the middle; Figure 6It is a side cross-sectional schematic diagram of the three-dimensional structure of the present invention; Figure 7 for Figure 6 A magnified schematic diagram of the structure at D in the middle; Figure 8 It is a cross-sectional schematic diagram of the connection between the fixing plate and the guide plate of the present invention; Figure 9 for Figure 8 A magnified schematic diagram of the structure at E in the middle; Figure 10 It is a cross-sectional schematic diagram of the connection between the fixing plate and the storage plate of the present invention; Figure 11 It is a cross-sectional schematic diagram of the connection between the fixed plate and the hinge plate of the present invention.

[0016] In the figure: fixed plate 1, sink groove 2, storage plate 3, first storage groove 4, 3D display screen 5, first connecting groove 6, hinge plate 7, second connecting groove 8, countersunk hole 9, first limiting groove 10, limiting block 11, second storage groove 12, first airbag 13, first return spring 14, first exhaust pipe 15, first make way groove 16, insertion rod 17, third storage groove 18, second airbag 19, extrusion block 20, fourth storage groove 21, holding block 22, second return spring Spring 23, through hole 24, first pull rope 25, groove 26, shift block 27, third airbag 28, third return spring 29, second give way groove 30, guide groove 31, guide block 32, second exhaust duct 33, fifth receiving groove 34, flexible baffle 35, guide plate 36, second limiting groove 37, fourth airbag 38, fourth return spring 39, fifth airbag 40, third exhaust duct 41, sixth receiving groove 42, extrusion plate 43, sixth airbag 44. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples. Example 1:

[0018] See also Figures 1 to 11 The present invention provides a technical solution: a foldable 3D expansion display device and a method of using the same, comprising: A fixed plate 1, wherein a 3D display screen 5 is provided inside the fixed plate 1, and a storage component is provided at a position of the fixed plate 1 corresponding to the 3D display screen 5 for storing the 3D display screen 5, wherein the storage component includes a storage plate 3; A connecting assembly, used to connect two adjacent groups of fixing plates 1 to achieve unfolding, fixing or folding of the two adjacent groups of fixing plates 1, the connecting assembly comprising a hinged plate 7; A protection component, used to protect the 3D display screen 5, the protection component including a flexible baffle 35; The connection between two adjacent groups of fixed plates 1 is achieved through the connecting component, and then the splicing of two adjacent groups of 3D display screens 5 is achieved. When in use, the fixing plate 1 can be directly fixed to the specified position. When folding is required, the fixing plate 1 is removed from the specified position, and then the two adjacent groups of fixed plates 1 are folded through the connecting component. When folding, the 3D display screen 5 on the fixing plate 1 can be protected by the protective component. Example 2:

[0019] like Figure 6-Figure 7 As shown, the structure of the foldable 3D expansion display device and the method of using the same disclosed in the second embodiment of the present invention is basically the same as that in the first embodiment, except that: A sinking groove 2 is provided at the center of the end surface of the fixing plate 1, and the storage plate 3 is arranged inside the sinking groove 2; A first receiving slot 4 is provided at the center of the end surface of the storage plate 3 , and the 3D display screen 5 is installed inside the first receiving slot 4 ; A plurality of sets of third return springs 29 are provided between the lower end of the storage plate 3 and the inner bottom end of the sink 2. The storage plate 3 is elastically provided inside the sink 2 by the plurality of sets of third return springs 29. Guide blocks 32 are installed on both side walls of the storage plate 3. Guide grooves 31 are opened on the inner side walls of the sink 2 at positions corresponding to the two groups of guide blocks 32. The guide blocks 32 are slidably arranged inside the guide grooves 31. The 3D display screen 5 can be accommodated by the cooperation of the fixing plate 1 and the storage plate 3 , and the provision of the third return spring 29 can buffer the 3D display screen 5 . Example 3:

[0020] like Figure 2-Figure 5 As shown, the structure of the foldable 3D expansion display device and the method of using the same disclosed in the third embodiment of the present invention is basically the same as that in the second embodiment, except that: The side walls of the fixed plate 1 are respectively provided with a first connecting groove 6 and a second connecting groove 8. The hinge plate 7 is arranged between the adjacent first connecting groove 6 and the second connecting groove 8. The first connecting groove 6 and the second connecting groove 8 are both provided with a second clearance groove 30 at positions corresponding to the hinge plate 7. Two sets of symmetrically distributed insertion rods 17 are provided at both ends of the hinge plate 7. A countersunk hole 9 is provided at the top end of the first connecting groove 6 corresponding to the position of the insertion rod 17. The insertion rod 17 is rotatably inserted into the inside of the countersunk hole 9. A first clearance groove 16 is formed at the inner top of the second connecting groove 8 corresponding to the position of the other group of the insertion rods 17, and the insertion rods 17 are slidably arranged inside the first clearance groove 16; The connection between two adjacent groups of fixing plates 1 is achieved through the hinge plate 7. Since the distance between the two groups of fixing plates 1 when unfolded is different from the distance between the two groups of fixing plates 1 when folded, the hinge plate 7 is set to be slidably connected to one of the groups of fixing plates 1. Example 4:

[0021] like Figure 2-Figure 5 As shown, the structure of the foldable 3D expansion display device and the method of using the same disclosed in the fourth embodiment of the present invention is basically the same as that in the third embodiment, except that: A third receiving groove 18 is formed at the end of the insertion rod 17, and a fourth receiving groove 21 is formed at the inner top end of the first relief groove 16 corresponding to the position of the third receiving groove 18. A supporting block 22 is inserted into the inner part of the fourth receiving groove 21, and a second return spring 23 is provided between the end of the supporting block 22 and the inner top end of the fourth receiving groove 21. A groove 26 is provided on the side wall of the fixing plate 1 at a position corresponding to the supporting block 22, a shift block 27 is slidably provided inside the groove 26, and a through hole 24 is provided between the interior of the groove 26 and the interior of the fourth receiving slot 21, a first pull rope 25 is provided inside the through hole 24, and both ends of the first pull rope 25 are respectively connected to the end of the shift block 27 and the end of the supporting block 22.

[0022] An extrusion block 20 is inserted into the third receiving groove 18 at a position corresponding to the abutting block 22 , and a second air bag 19 is provided between the end of the extrusion block 20 and the inner wall of the third receiving groove 18 ; A second receiving groove 12 is formed at the end of the other group of insertion rods 17. A limiting block 11 is provided inside the second receiving groove 12. A first return spring 14 is provided between the end of the limiting block 11 and the inner wall of the second receiving groove 12. A first limiting groove 10 is formed on the inner wall of the countersunk hole 9 at the position corresponding to the limiting block 11. A first airbag 13 is provided between the end of the limiting block 11 and the inner wall of the second receiving groove 12 , and a first exhaust pipe 15 is provided between the first airbag 13 and the second airbag 19 ; When in use, flip one of the groups of fixed plates 1 so that the two adjacent groups of fixed plates 1 are laid flat. After laying flat, the two groups of fixed plates 1 are close to each other. At this time, the hinged plate 7 will move toward the inside of the second connecting groove 8. When the elastically set supporting block 22 is inserted into the inside of the third receiving groove 18, the hinged plate 7 is fixedly connected to one of the groups of fixed plates 1. At the same time, the elastically set supporting block 22 presses the extrusion block 20 downward, and the extrusion block 20 compresses the second airbag 19. The internal gas of the second airbag 19 is discharged to the inside of the first airbag 13 through the first exhaust pipe 15. The first airbag 13 expands, so that the limit block 11 is inserted into the inside of the first limit groove 10, so that the hinged plate 7 is fixedly connected to the other group of fixed plates 1, and then the two groups of fixed plates 1 are fixedly connected. Embodiment 5:

[0023] like Figure 6-Figure 7 As shown, the structure of the foldable 3D expansion display device and the method of using the same disclosed in the fifth embodiment of the present invention is basically the same as that in the fourth embodiment, except that: A fifth receiving slot 34 is provided inside the fixing plate 1 at a position corresponding to the 3D display screen 5 , and a flexible baffle 35 is provided inside the fifth receiving slot 34 ; A second limiting groove 37 is provided inside the fixing plate 1 at a position corresponding to the flexible baffle 35 , and a guide plate 36 is slidably provided inside the second limiting groove 37 ; A fourth return spring 39 is provided between the end of the guide plate 36 and the inner side wall of the second limiting groove 37 , and the guide plate 36 is elastically connected to the fixing plate 1 via the fourth return spring 39 ; A third air bag 28 is provided between the lower end of the storage plate 3 and the inner bottom end of the sink 2; A fourth airbag 38 is provided between the other end of the guide plate 36 and the inner side wall of the second limiting groove 37 , and a second exhaust pipe 33 is provided between the fourth airbag 38 and the third airbag 28 ; A fifth airbag 40 is provided between the lower end of the guide block 32 and the inner bottom end of the guide groove 31; A sixth receiving groove 42 is formed on the inner side wall of the first clearance groove 16 at a position corresponding to the insertion rod 17. An extrusion plate 43 is inserted into the inner side wall of the sixth receiving groove 42, and a sixth airbag 44 is provided between the inner wall of the sixth receiving groove 42 and the end of the extrusion plate 43. A third exhaust pipe 41 is provided between the sixth airbag 44 and the fifth airbag 40 ; When the hinge plate 7 moves toward the second connecting groove 8, the insertion rod 17 squeezes the extrusion plate 43. At this time, the gas inside the sixth airbag 44 on one side of the extrusion plate 43 is discharged into the fifth airbag 40 through the third exhaust pipe 41. The fifth airbag 40 expands, driving the storage plate 3 upward through the guide block 32, thereby extending the 3D display screen 5. At the same time, when the storage plate 3 rises, the third airbag 28 is no longer compressed. At this time, the guide plate 36 moves under the action of the fourth return spring 39, and the flexible baffle 35 is stored in the interior of the fifth storage groove 34. Specifically, when the 3D display screen 5 needs to be folded, the fixing plate 1 is first removed, and then the shifting block 27 is shifted. The shifting block 27 drives the abutting block 22 to move out of the third receiving groove 18 through the first pull rope 25. At the same time, the elastically arranged limiting block 11 moves out of the first limiting groove 10. At this time, the two adjacent sets of fixing plates 1 are hinged, and then one set of fixing plates 1 is flipped closer to the other set of fixing plates 1 to achieve folding. When the fixed plate 1 is folded, the insertion rod 17 no longer squeezes the squeezing plate 43. At this time, the storage plate 3 moves downward under the action of the third return spring 29, so that the end face of the 3D display screen 5 is lower than the end face of the fixed plate 1, thereby achieving protection for the end face of the 3D display screen 5. When the storage plate 3 moves downward, it will compress the internal gas of the third airbag 28. The internal gas of the third airbag 28 is discharged to the inside of the fourth airbag 38 through the second exhaust pipe 33. The fourth airbag 38 expands and pushes the guide plate 36 to move along the second limiting groove 37. When the guide plate 36 moves, it drives the flexible baffle 35 to cover the upper end of the 3D display screen 5, further protecting the 3D display screen 5.

[0024] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A foldable 3D expansion display device, characterized in that: include: A fixed plate (1), wherein a 3D display screen (5) is provided inside the fixed plate (1), and a storage component is provided on the fixed plate (1) at a position corresponding to the 3D display screen (5) for storing the 3D display screen (5), wherein the storage component includes a storage plate (3); A connecting assembly, used for connecting two adjacent groups of fixing plates (1) to achieve unfolding, fixing or folding of the two adjacent groups of fixing plates (1), the connecting assembly comprising a hinged plate (7); A protective component, used for protecting the 3D display screen (5), the protective component comprising a flexible baffle (35); The side walls of both sides of the fixed plate (1) are respectively provided with a first connecting groove (6) and a second connecting groove (8); the hinge plate (7) is arranged between the adjacent first connecting groove (6) and the second connecting groove (8); and the first connecting groove (6) and the second connecting groove (8) are both provided with a second clearance groove (30) at positions corresponding to the hinge plate (7); Two sets of symmetrically distributed insertion rods (17) are provided at both ends of the hinged plate (7); a countersunk hole (9) is provided at the inner top end of the first connecting groove (6) corresponding to the position of the insertion rod (17); the insertion rod (17) is rotatably inserted into the interior of the countersunk hole (9); A first clearance groove (16) is provided at the inner top end of the second connecting groove (8) corresponding to the position of another group of the insertion rods (17), and the insertion rods (17) are slidably arranged inside the first clearance groove (16); A third receiving groove (18) is provided at the end of the insertion rod (17); a fourth receiving groove (21) is provided at the inner top of the first relief groove (16) corresponding to the position of the third receiving groove (18); a supporting block (22) is provided inside the fourth receiving groove (21), and a second return spring (23) is provided between the end of the supporting block (22) and the inner top of the fourth receiving groove (21); A groove (26) is provided on the side wall of the fixing plate (1) at a position corresponding to the abutting block (22), a shifting block (27) is slidably provided inside the groove (26), and a through hole (24) is provided between the inside of the groove (26) and the inside of the fourth receiving slot (21), a first pull rope (25) is provided inside the through hole (24), and two ends of the first pull rope (25) are respectively connected to the end of the shifting block (27) and the end of the abutting block (22); An extrusion block (20) is inserted and arranged inside the third receiving groove (18) at a position corresponding to the abutting block (22), and a second air bag (19) is arranged between the end of the extrusion block (20) and the inner wall of the third receiving groove (18); A second receiving groove (12) is provided at the end of another group of the insertion rods (17), a limiting block (11) is provided inside the second receiving groove (12), and a first return spring (14) is provided between the end of the limiting block (11) and the inner wall of the second receiving groove (12), and a first limiting groove (10) is provided on the inner wall of the countersunk hole (9) at a position corresponding to the limiting block (11); A first airbag (13) is provided between the end of the limiting block (11) and the inner wall of the second receiving groove (12), and a first exhaust pipe (15) is provided between the first airbag (13) and the second airbag (19).

2. The foldable 3D expansion display device according to claim 1, characterized in that: A sink groove (2) is provided at the center of the end surface of the fixed plate (1), and the storage plate (3) is arranged inside the sink groove (2); A first receiving groove (4) is provided at the center of the end surface of the storage plate (3), and the 3D display screen (5) is installed inside the first receiving groove (4).

3. The foldable 3D expansion display device according to claim 2, characterized in that: A plurality of sets of spaced-apart third return springs (29) are provided between the lower end of the storage plate (3) and the inner bottom end of the sink (2), and the storage plate (3) is elastically arranged inside the sink (2) by the plurality of sets of third return springs (29); Guide blocks (32) are installed on both side walls of the storage plate (3), and guide grooves (31) are opened on the inner side walls of the sink (2) at positions corresponding to the two groups of guide blocks (32), and the guide blocks (32) are slidably arranged inside the guide grooves (31).

4. The foldable 3D expansion display device according to claim 3, characterized in that: A fifth receiving slot (34) is provided inside the fixing plate (1) at a position corresponding to the 3D display screen (5), and a flexible baffle (35) is provided inside the fifth receiving slot (34); A second limiting groove (37) is provided inside the fixed plate (1) at a position corresponding to the flexible baffle (35), and a guide plate (36) is slidably provided inside the second limiting groove (37); A fourth return spring (39) is provided between the end of the guide plate (36) and the inner side wall of the second limiting groove (37), and the guide plate (36) is elastically connected to the fixing plate (1) via the fourth return spring (39).

5. The foldable 3D expansion display device according to claim 4, characterized in that: A third air bag (28) is provided between the lower end of the storage plate (3) and the inner bottom end of the sink (2); A fourth airbag (38) is provided between the other end of the guide plate (36) and the inner side wall of the second limiting groove (37), and a second exhaust pipe (33) is provided between the fourth airbag (38) and the third airbag (28).

6. The foldable 3D expansion display device according to claim 5, characterized in that: A fifth air bag (40) is provided between the lower end of the guide block (32) and the inner bottom end of the guide groove (31); A sixth receiving groove (42) is provided on the inner side wall of the first relief groove (16) at a position corresponding to the insertion rod (17), an extrusion plate (43) is inserted into the interior of the sixth receiving groove (42), and a sixth air bag (44) is provided between the inner wall of the sixth receiving groove (42) and the end of the extrusion plate (43); A third exhaust duct (41) is provided between the sixth airbag (44) and the fifth airbag (40).

7. A method for using a foldable 3D expansion display device, characterized in that: The foldable 3D expansion display device according to any one of claims 1 to 6, wherein the method of using the foldable 3D expansion display device comprises: The expansion of the 3D expansion display device: two adjacent groups of fixed plates (1) are connected by a hinge plate (7). When in use, one of the groups of fixed plates (1) is flipped over so that the two adjacent groups of fixed plates (1) are laid flat. After being laid flat, the two groups of fixed plates (1) are close to each other. At this time, the hinge plate (7) will move toward the inside of the second connecting groove (8). When the elastically arranged abutting block (22) is inserted into the inside of the third receiving groove (18), the hinge plate (7) is fixedly connected to one of the groups of fixed plates (1). At the same time, the elastically arranged abutting block (22) presses the squeezing block (20) downward, and the squeezing block (20) compresses the second airbag (19). The gas inside the second airbag (19) is discharged to the inside of the first airbag (13) through the first exhaust pipe (15). The first airbag (13) expands, so that the limiting block (11) is inserted into the inside of the first limiting groove (10), thereby realizing the fixed connection between the hinge plate (7) and the other group of fixed plates (1), thereby fixing the two groups of fixed plates (1); Extension of the 3D expansion display device: When the hinge plate (7) moves toward the second connection groove (8), the insertion rod (17) squeezes the extrusion plate (43). At this time, the internal gas of the sixth airbag (44) on one side of the extrusion plate (43) is discharged into the interior of the fifth airbag (40) through the third exhaust pipe (41). The fifth airbag (40) expands and drives the storage plate (3) to rise through the guide block (32), thereby extending the 3D display screen (5); Contraction of the protective assembly: when the storage plate (3) rises, the third airbag (28) is no longer compressed, and the guide plate (36) moves under the action of the fourth return spring (39), storing the flexible baffle (35) inside the fifth storage groove (34); Folding of the 3D expansion display device: the shifting block (27) is shifted, and the shifting block (27) drives the supporting block (22) to move out from the inside of the third receiving groove (18) through the first pull rope (25). At the same time, the elastically arranged limiting block (11) moves out from the inside of the first limiting groove (10). At this time, the two adjacent groups of fixed plates (1) are hinged, and then one group of fixed plates (1) is flipped and moved closer to the other group of fixed plates (1) to achieve folding.

Images