A foldable and pressure-resistant folding screen for exhibition

Abstract

A foldable and pressure-proof exhibition folding screen, the present invention relates to the technical field of exhibition devices, the first bottom plate and the second bottom plate are connected by right-angle hinges, the second bottom plate and the third bottom plate are connected by right-angle hinges, the first bottom plate, the second bottom plate and the third bottom plate are provided with slide grooves on the front and back of the upper surface, and the three slide grooves on the same side are mutually connected; a number of exhibition boards are distributed in a "W" shape on the upper part of a whole formed by the first bottom plate, the second bottom plate and the third bottom plate, the bottom of each exhibition board is detachably connected with a slide column by a positioning pin, the base is movably arranged in the slide groove, and the outer wall of the base is fixed with a clamping rod. It has a supporting effect when folded, preventing the folding screen from being crushed when folded and stored, and is convenient for the unfolding and folding of the folding screen, and is easy to transport, and more practical.

Description

Technical Field

[0001] The present invention relates to the technical field of exhibition devices, and in particular to a foldable and pressure-resistant folding screen for exhibition. Background Art

[0002] Exhibition refers to the public display of originals or copies of works of art and photography. Exhibitions are a combination of information, communication and entertainment, and are the only marketing medium that fully taps the five senses in face-to-face communication. Despite the emergence of high-speed electronic communication in the 20th century, exhibitions, as temporary markets, are still the most professional and effective sales tool.

[0003] Folding screens are used in a series of exhibits. When folding and storing, the current folding screens are easily crushed because there is no supporting structure between adjacent display screens, which urgently needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a reasonably designed folding and pressure-resistant folding screen for exhibition, which has a supporting effect when folded, prevents the folding screen from being crushed when folded and stored, and facilitates the unfolding and folding of the folding screen, and is easy to transport and more practical.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: it comprises a No. 1 bottom plate, a No. 2 bottom plate, a No. 3 bottom plate, an exhibition board, a magnetic positioning column, a right-angle hinge, a No. 1 spring, a No. 2 spring, a sliding column and a positioning pin; the No. 1 bottom plate is screwed to the No. 2 bottom plate by a right-angle hinge, the No. 2 bottom plate is screwed to the No. 3 bottom plate by a right-angle hinge, the No. 1 bottom plate, the No. 2 bottom plate and the No. 3 bottom plate are screwed to each other by a right-angle hinge, the No. 1 bottom plate, the No. 2 bottom plate and the No. 3 bottom plate are provided with sliding grooves on the front and back of the upper surfaces, and the three sliding grooves on the same side are mutually connected; a plurality of exhibition boards are distributed in a "W" shape on the upper part of a whole formed by the No. 1 bottom plate, the No. 2 bottom plate and the No. 3 bottom plate, the bottom of each exhibition board is detachably connected to a sliding column by a positioning pin, the length of the No. 2 bottom plate is equal to the height of the exhibition board, and the sliding column is composed of a base, a sleeve column and a clamping rod. The base is movably arranged in the slide groove, and a clamping rod is fixed on the outer wall of the base, and the clamping rod is movably inserted in the clamping groove provided in the rear wall of the slide groove, and a sleeve column is integrally formed on the upper end of the base, and a sleeve column pin hole is provided in the sleeve column, and an exhibition board pin hole is provided at the bottom of the exhibition board through the front and back, and the sleeve column is inserted in the bottom of the exhibition board, and the positioning pin passes through the exhibition board pin hole and the sleeve column pin hole; a No. 1 spring and a No. 2 spring are alternately connected between the sliding columns on the front side of the bottom of two adjacent exhibition boards; a No. 2 spring and a No. 1 spring are alternately connected between the sliding columns on the rear side of the bottom of two adjacent exhibition boards; the elastic force of the No. 1 spring is greater than the elastic force of the No. 2 spring; magnetic positioning columns are fixed on the front and back of the top walls of the above-mentioned exhibition boards, and the magnetic positioning columns are magnetically movably adsorbed with the inner wall of the slide groove on the upper surface of the No. 3 bottom plate.

[0006] Furthermore, a No. 5 spring and a No. 3 spring are fixed to the outer walls of the front and rear sliding columns at the bottom of the leftmost display board, respectively; a No. 6 spring and a No. 4 spring are fixed to the outer walls of the front and rear sliding columns at the bottom of the rightmost display board, respectively.

[0007] Furthermore, right-angle connecting rods are provided on the front side walls of the adjacent parts of the No. 1 base plate, the No. 2 base plate and the No. 3 base plate; the right-angle connecting rods are composed of a positioning guide shaft, a connecting rod and a rotating shaft; one end of the two connecting rods are sleeved on the rotating shaft, and the other ends of the two connecting rods are fixed with a positioning guide shaft, and the positioning guide shaft is movably clamped in the guide shaft slide groove, and the guide shaft slide groove is opened on the front side walls of the No. 1 base plate, the No. 2 base plate and the No. 3 base plate.

[0008] Furthermore, a bottom groove is provided at the bottom of the No. 1 bottom plate, and roller grooves are provided at the four corners of the bottom wall of the bottom groove. The roller is movably arranged in the roller groove, and the roller is fixed on the bottom wall of the roller mounting plate. The roller mounting plate is fixed on the output end of the No. 1 electric lifting rod, and the No. 1 electric lifting rod is fixed on the bottom wall of the bottom groove.

[0009] Furthermore, a display slot No. 1 is provided on the front side wall of the display board, and hooks are fixed on the four corners of the display slot No. 1 by springs, and the hooks are respectively hooked in the buckles at the four corners of the curtain.

[0010] Furthermore, a No. 2 display slot is provided on the rear wall of the display board, and a plurality of No. 2 electric lifting rods are fixed on the inner wall of the No. 2 display slot, and the output ends of the No. 2 electric lifting rods are all against the outer wall of the display frame.

[0011] The working principle of the present invention is as follows: when display is needed, the No. 1 bottom plate, the No. 2 bottom plate and the No. 3 bottom plate are unfolded and flattened. At this time, several adjacently arranged display boards are unfolded under the elastic force of the No. 1 spring and the No. 2 spring, and because the elastic force of the No. 1 spring is greater than the elastic force of the No. 2 spring, the several display boards are unfolded in a "W" shape, and then the content to be displayed is posted on the front and back of the display boards. The content to be displayed can also be directly printed on the display boards. When it is necessary to replace display boards with different display contents, it is only necessary to pull out the positioning pins on the sliding columns at the bottom of the display boards to be replaced, so that the display boards are separated from the sliding columns, and then the display boards to be displayed are inserted on the sliding columns, and then fixed by the positioning pins.

[0012] After the display is over, push several display boards to one side until the side display boards hit the inner edge of the slide, then fold the No. 2 bottom plate upwards so that the No. 2 bottom plate is vertically set at 90° with the No. 1 bottom plate, and finally fold the No. 3 bottom plate so that the No. 3 bottom plate is vertically set at 90° between the No. 2 bottom plates. At this time, the slide in the No. 3 bottom plate is buckled on the magnetic positioning column, and the magnetic positioning column and the inner wall of the slide are used for magnetic adsorption to achieve positioning, so that several display boards are positioned between the No. 1 bottom plate and the No. 3 bottom plate; the whole is stably stored under the action of the right-angle hinge.

[0013] After adopting the above structure, the beneficial effect of the present invention is: the present invention provides a foldable and pressure-proof folding screen for exhibition, which has a supporting effect when folded, preventing the folding screen from being crushed when folded and stored, and facilitates the unfolding and folding of the folding screen, and is easy to transport, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 yes Figure 1 Top view of the .

[0016] Figure 3 It is a schematic diagram of the structure of the present invention in the storage state.

[0017] Figure 4 It is a structural schematic diagram of the sliding column in the present invention.

[0018] Figure 5 It is a front schematic diagram of the display board in a specific implementation manner.

[0019] Figure 6 It is a schematic diagram of the back side of the display board in a specific implementation manner.

[0020] Description of reference numerals:

[0021] Bottom plate No. 1 1, bottom slot 1-1, roller slot 1-2, bottom plate No. 2 2, bottom plate No. 3 3, display board 4, display slot No. 1 4-1, display slot No. 2 4-2, display board pin hole 4-3, magnetic positioning column 5, right-angle hinge 6, right-angle connecting rod 7, positioning guide shaft 7-1, connecting rod 7-2, rotating shaft 7-3, spring No. 1 8, spring No. 2 9, slide slot 10, spring No. 3 11, spring No. 4 12, spring No. 5 13, spring No. 6 14, guide shaft slide slot 15, slide column 16, base 16-1, sleeve column 16-2, clamping rod 16-3, sleeve column pin hole 16-4, positioning pin 17, electric lifting rod No. 1 18, roller mounting plate 19, roller 20, hook 21, electric lifting rod No. 2 22, curtain 23, display frame 24. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 6As shown, this specific implementation adopts the following technical scheme: it includes a No. 1 base plate 1, a No. 2 base plate 2, a No. 3 base plate 3, an exhibition board 4, a magnetic positioning column 5, a right-angle hinge 6, a No. 1 spring 8, a No. 2 spring 9, a No. 3 spring 11, a No. 4 spring 12, a No. 5 spring 13, a No. 6 spring 14, a guide shaft slide 15, a slide column 16, a positioning pin 17, a No. 1 electric lifting rod 18, a roller mounting plate 19, a roller 20, a hook 21, a No. 2 electric lifting rod 22, a curtain 23 and a display frame 24; the front side wall of the exhibition board 4 is provided with a No. 1 display slot 4-1, and the four corners of the No. 1 display slot 4-1 are fixed with hooks 21 by springs, and the two ends of the spring are respectively welded and fixed to the inner wall of the No. 1 display slot 4-1 and the hook 21, and the hooks 21 are respectively Hooked in the buckles at the four corners of the curtain 23, a No. 2 display slot 4-2 is provided on the rear wall of the display board 4, and two No. 2 electric lifting rods 22 are bolted and riveted on each edge of the inner wall of the No. 2 display slot 4-2, and the output ends of the No. 2 electric lifting rods 22 are all against the outer wall of the display frame 24. A bottom slot 1-1 is provided at the bottom of the No. 1 bottom plate 1, and roller slots 1-2 are provided at the four corners of the bottom wall of the bottom slot 1-1. The roller 20 is movably arranged in the roller slot 1-2, and the roller 20 is bolted and riveted to the bottom wall of the roller mounting plate 19, and the roller mounting plate 19 is bolted and riveted to the output end of the No. 1 electric lifting rod 18, and the No. 1 electric lifting rod 18 is bolted and riveted to the bottom wall of the bottom slot 1-1. The No. 1 bottom plate 1 and the No. 2 bottom plate 2 are connected by straight The angle hinge 6 is rotated, and the second base plate 2 and the third base plate 3 are rotated by the right-angle hinge 6. The front side walls of the adjacent parts of the first base plate 1, the second base plate 2 and the third base plate 3 are all provided with right-angle connecting rods 7; the right-angle connecting rod 7 is composed of a positioning guide shaft 7-1, a connecting rod 7-2 and a rotating shaft 7-3; one end of the two connecting rods 7-2 is sleeved on the rotating shaft 7-3, and the other ends of the two connecting rods 7-2 are fixed with positioning guide shafts 7-1, and the positioning guide shafts 7-1 are movably clamped in the guide shaft slide groove 15 (when the right-angle connecting rod 7 is in a "one" shape structure, the two positioning guide shafts 7-1 are respectively against the outer end walls of the two guide shaft slide grooves 15, and when the right-angle connecting rod 7 is in a right-angle structure, the two positioning guide shafts 7-1 are respectively against the two guide shaft slide grooves 15 The guide shaft slide groove 15 is provided on the front side wall of the No. 1 bottom plate 1, the No. 2 bottom plate 2 and the No. 3 bottom plate 3; the upper surfaces of the No. 1 bottom plate 1, the No. 2 bottom plate 2 and the No. 3 bottom plate 3 are all provided with slide grooves 10, and the three slide grooves 10 located on the same side are mutually connected (wherein the outer ends of the slide grooves 10 located on the No. 1 bottom plate 1 and the No. 3 bottom plate 3 are all closed structures); the three display boards 4 are distributed in a "W" shape on the upper part of a whole formed by the No. 1 bottom plate 1, the No. 2 bottom plate 2 and the No. 3 bottom plate 3, and the bottom of each display board 4 is detachably connected with a slide column 16 by a positioning pin 17, the length of the No. 2 bottom plate 2 is equal to the height of the display board 4, and the slide column 16 is composed of a base 16-1, a sleeve column 16-2 and a clamping rod 16-3;The base 16-1 is movably arranged in the slide slot 10, and a clamping rod 16-3 is integrally formed on the outer wall of the base 16-1, and the clamping rod 16-3 is movably inserted in the clamping slot provided on the rear wall of the slide slot 10, and a sleeve column 16-2 is integrally formed on the upper end of the base 16-1, and a sleeve column pin hole 16-4 is provided in the sleeve column 16-2, and an exhibition board pin hole 4-3 is provided at the bottom of the exhibition board 4, and the sleeve column 16-2 is inserted in the bottom of the exhibition board 4, and the positioning pin 17 passes through the exhibition board pin hole 4-3 and the sleeve column pin hole 16-4; a first spring 8 and a second spring 9 are alternately welded and fixed between the slide columns 16 on the front side of the bottom of two adjacent exhibition boards 4; a second spring 9 and a first spring 8 are alternately welded and fixed between the slide columns 16 on the rear side of the bottom of two adjacent exhibition boards 4 Spring 8; the elastic force of spring 8 No. 1 is greater than the elastic force of spring 9 No. 2; the top wall of the above-mentioned display board 4 is bolted and riveted with magnetic positioning columns 5, and the magnetic positioning columns 5 are magnetically adsorbed with the inner wall of the slide groove 10 on the upper surface of the third bottom plate 3; the outer walls of the front and rear two slide columns 16 at the bottom of the leftmost display board 4 are respectively fixed with spring 5 13 and spring 3 11; the outer walls of the front and rear two slide columns 16 at the bottom of the rightmost display board 4 are respectively fixed with spring 6 14 and spring 4 12, wherein the elastic force of spring 3 11 and spring 6 14 is the same as that of spring 1 8; the elastic force of spring 5 13 and spring 4 12 is the same as that of spring 9 No. 2; the above-mentioned electric lifting rod No. 1 18 and electric lifting rod No. 2 22 are self-equipped with power supply. ;

[0024] The working principle of this specific embodiment is as follows: when display is needed, the first base plate 1, the second base plate 2 and the third base plate 3 are unfolded and flattened. At this time, several adjacent display boards 4 are unfolded under the elastic force of the first spring 8 and the second spring 9. Since the elastic force of the first spring 8 is greater than the elastic force of the second spring 9, the several display boards 4 are unfolded in a "W" shape. Then, the curtain 22 to be displayed is displayed in the first display slot 4-1 on the front of the display board 4 by using the hook 21, and the display frame 2 to be displayed is placed on the first display slot 4-1 on the front of the display board 4. The second electric lifting rod 22 is arranged between the second display slot 4-2 on the back of the display board 4. The second electric lifting rod 22 is used to adapt to the positioning and fixing of display frames 24 of different sizes and different outer contours. When the display board 4 needs to be replaced, it is only necessary to pull out the positioning pin 17 on the slide column 16 at the bottom of the display board 4 to be replaced, so that the display board 4 is separated from the slide column 16, and then the display board 4 to be displayed is inserted on the slide column 16, and then the positioning pin 17 is used to insert and fix it;

[0025] After the display is over, the operator stands on the third base plate 3 and pushes several display panels 4 to one side of the first base plate 1 until the display panels 4 on the side hit the inner edge of the slide 10. At this time, the operator stands on the first base plate 1, and then the operator steps on the shaft 7-3 of the right-angle connecting rod 7 with his foot, so that the shaft 7-3 sinks and drives the two connecting rods 7-2 to rotate. At the same time, the positioning guide shaft 7-1 connected to the end of the connecting rod 7-2 slides from the outer end of the guide shaft slide 15 to the inside until it hits the inner wall. While the connecting rod 7-2 rotates, it drives the second base plate 2 to fold upward, so that the second base plate 2 and the first base plate 1 are vertically set at 90°. Finally, the operator uses his arm to raise or uses a push rod to push the shaft 7-3 part of the right-angle connecting rod 7 at the upper end of the second base plate 2 to the upper left. When the connecting rod 7-2 is rotated, the rotating shaft 7-3 moves upward and drives the two connecting rods 7-2 to rotate. At the same time, the positioning guide shaft 7-1 connected to the end of the connecting rod 7-2 slides from the outer end of the guide shaft slide groove 15 to the inside until it is against the inner wall. When the connecting rod 7-2 rotates, it drives the third base plate 3 to be folded, so that the third base plate 3 is vertically arranged at 90° between the second base plate 2. At this time, the slide groove 10 in the third base plate 3 is buckled on the magnetic positioning column 5, and the magnetic positioning column 5 and the inner wall of the slide groove 10 are used for magnetic adsorption to achieve positioning, so that several display panels 4 are positioned between the first base plate 1 and the third base plate 3; the whole is stably stored under the action of the right-angle hinge 6; when the whole is in the stored state, the first electric lifting rod 18 is started to retract, driving the roller 20 to descend to expose the bottom of the first base plate 1, and the whole is propped up to facilitate the movement of the whole.

[0026] After adopting the above structure, the beneficial effects of this specific implementation are as follows:

[0027] 1. The arrangement of springs No. 1, No. 2, No. 3, No. 4, No. 5 and No. 6 enables multiple springs to have a supporting function when folded, so as to prevent the folding screen from being crushed when folded and stored;

[0028] 2. The setting of No. 1 spring and No. 2 spring makes it easy for multiple display boards to automatically unfold in a "W" shape, which is convenient for the rapid progress of display work;

[0029] 3. Set the No. 1, No. 2 and No. 3 bottom plates to be foldable, so that multiple display panels can be placed and stored easily;

[0030] 4. The hidden rollers can move the whole thing after storage, making it easier to carry out finishing work after the exhibition.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable and pressure-proof folding screen for exhibition, characterized in that: It comprises a No. 1 bottom plate (1), a No. 2 bottom plate (2), a No. 3 bottom plate (3), an exhibition board (4), a magnetic positioning column (5), a right-angle hinge (6), a No. 1 spring (8), a No. 2 spring (9), a sliding column (16) and a positioning pin (17); the No. 1 bottom plate (1) and the No. 2 bottom plate (2) are screwed together by the right-angle hinge (6), the No. 2 bottom plate (2) and the No. 3 bottom plate (3) are screwed together by the right-angle hinge (6), and the No. 1 bottom plate (1), the No. 2 bottom plate (2) and the No. 3 bottom plate (3) are all provided with sliding grooves (10) on the front and rear surfaces of the upper surfaces, and the sliding grooves (10) are located at the same The three slide grooves (10) on one side are interlinked; a plurality of display panels (4) are distributed in a "W" shape on the upper part of a whole formed by a No. 1 bottom plate (1), a No. 2 bottom plate (2) and a No. 3 bottom plate (3); the bottom of each display panel (4) is detachably connected to a slide column (16) by a positioning pin (17); the length of the No. 2 bottom plate (2) is equal to the height of the display panel (4); the slide column (16) is composed of a base (16-1), a sleeve column (16-2) and a clamping rod (16-3); the base (16-1) is movably arranged in the slide groove (1 0), a clamping rod (16-3) is fixed to the outer wall of the base (16-1), the clamping rod (16-3) is movably inserted into a clamping groove provided on the rear wall of the slide groove (10), a sleeve column (16-2) is integrally formed at the upper end of the base (16-1), a sleeve column pin hole (16-4) is provided in the sleeve column (16-2), an exhibition board pin hole (4-3) is provided through the bottom of the exhibition board (4), the sleeve column (16-2) is inserted into the bottom of the exhibition board (4), and a positioning pin (17) passes through the exhibition board pin hole (4-3) and the sleeve column pin The hole (16-4) is provided; a first spring (8) and a second spring (9) are alternately connected between the sliding columns (16) at the front sides of the bottoms of two adjacent display boards (4); a second spring (9) and a first spring (8) are alternately connected between the sliding columns (16) at the rear sides of the bottoms of two adjacent display boards (4); the elastic force of the first spring (8) is greater than the elastic force of the second spring (9); magnetic positioning columns (5) are fixed to the front and rear of the top walls of the display boards (4), and the magnetic positioning columns (5) are arranged to be magnetically active adsorbed to the inner wall of the slide groove (10) on the upper surface of the third bottom plate (3); A No. 5 spring (13) and a No. 3 spring (11) are fixed to the outer walls of the front and rear two sliding columns (16) at the bottom of the leftmost display board (4), respectively; a No. 6 spring (14) and a No. 4 spring (12) are fixed to the outer walls of the front and rear two sliding columns (16) at the bottom of the rightmost display board (4), respectively; A right-angle connecting rod (7) is provided on the front side walls of the adjacent parts of the first base plate (1), the second base plate (2) and the third base plate (3); the right-angle connecting rod (7) is composed of a positioning guide shaft (7-1), a connecting rod (7-2) and a rotating shaft (7-3); one end of each of the two connecting rods (7-2) is sleeved on the rotating shaft (7-3), and the other end of each of the two connecting rods (7-2) is fixed with a positioning guide shaft (7-1), and the positioning guide shaft (7-1) is movably clamped in a guide shaft slide groove (15), and the guide shaft slide groove (15) is provided on the front side walls of the first base plate (1), the second base plate (2) and the third base plate (3); The bottom of the No. 1 bottom plate (1) is provided with a bottom groove (1-1), and roller grooves (1-2) are provided through the four corners of the bottom wall of the bottom groove (1-1), and the roller (20) is movably arranged in the roller groove (1-2), and the roller (20) is fixed on the bottom wall of the roller mounting plate (19), and the roller mounting plate (19) is fixed on the output end of the No. 1 electric lifting rod (18), and the No. 1 electric lifting rod (18) is fixed on the bottom wall of the bottom groove (1-1); The front side wall of the display board (4) is provided with a display slot (4-1) No. 1, and hooks (21) are fixed at the four corners of the display slot (4-1) by means of springs, and the hooks (21) are respectively hooked in buckles at the four corners of the curtain (23); A No. 2 display slot (4-2) is provided on the rear wall of the display board (4), and a plurality of No. 2 electric lifting rods (22) are fixed on the inner wall of the No. 2 display slot (4-2), and the output ends of the No. 2 electric lifting rods (22) are all abutted against the outer wall of the display frame (24).

2. A method for using the foldable and pressure-resistant folding screen for exhibition according to claim 1, characterized in that: When display is required, the first base plate (1), the second base plate (2) and the third base plate (3) are unfolded and leveled. At this time, a plurality of adjacently arranged display boards (4) are unfolded under the elastic force of the first spring (8) and the second spring (9). Since the elastic force of the first spring (8) is greater than the elastic force of the second spring (9), the plurality of display boards (4) are unfolded in a "W" shape. Then, the content to be displayed is posted on the front and back sides of the display boards (4); or the content to be displayed is directly printed on the display boards (4). When it is necessary to replace the display boards (4) with different display contents, it is only necessary to pull out the positioning pins (17) on the sliding columns (16) at the bottom of the display boards (4) to be replaced, so that the display boards (4) are detached from the sliding columns (16), and then the display boards (4) to be displayed are inserted on the sliding columns (16) and fixed by the positioning pins (17). After the display is finished, the plurality of display panels (4) are pushed to one side until the display panels (4) on the side contact the inner edge of the slide groove (10), and then the second bottom plate (2) is folded upwards so that the second bottom plate (2) and the first bottom plate (1) are vertically arranged at 90 degrees. Finally, the third bottom plate (3) is folded so that the third bottom plate (3) is vertically arranged at 90 degrees between the second bottom plate (2). At this time, the slide groove (10) in the third bottom plate (3) is buckled on the magnetic positioning column (5), and the magnetic positioning column (5) and the inner wall of the slide groove (10) are used to achieve positioning, so that the plurality of display panels (4) are positioned between the first bottom plate (1) and the third bottom plate (3); the whole is stably stored under the action of the right-angle hinge (6).

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