Movable projection curtain for exhibition

Abstract

The utility model discloses a movable projection curtain for convention and exhibition, which relates to the field of projection curtains and comprises a bottom plate, a first side plate and a second side plate are respectively mounted on two sides of the top of the bottom plate, a fixing frame is arranged between the first side plate and the second side plate, and a through opening and a dismounting assembly are respectively arranged in the fixing frame. And the dismounting assembly comprises two positioning blocks. Through the arrangement of the dismounting assembly, when the cleaning brush plate needs to be dismounted, a user can rotate a threaded column to enable the threaded column to move outwards and drive a push block to move, at the moment, the push block does not extrude a movable block any more, a reset spring is stretched to push the movable block to reset and move, the movable block drives a clamping block to move, and the clamping block is moved out of a clamping groove; at the moment, the clamping block does not limit the positioning block any more, then the user can take out the cleaning brush plate, and the cleaning brush plate can be rapidly replaced in this way, so that the dirty cleaning brush plate can be taken out of the through opening in time, and the cleaning brush plate does not need to be fixed through a plurality of bolts.

Description

Technical Field

[0001] The utility model relates to the field of projection screens, in particular to a mobile projection screen for exhibitions. Background Art

[0002] In the process of exhibitions, it is often necessary to use a projector to display relevant information. Since the exhibition time is short and the location of the exhibition is not fixed each time, a mobile screen is needed; and the screen is mainly used in conjunction with the projector to display the image illuminated by the projector, so that viewers can more conveniently watch the image played by the projector.

[0003] According to a Chinese patent with publication number CN219349342U, a portable mobile screen for exhibitions is disclosed. The utility model pulls down the mounting rod at the bottom end of the projection screen. In the process of pulling the mounting rod, the fixed block cooperates with the mounting rod to squeeze the limit block. After the limit block is squeezed, it drives the spring to shrink into the storage groove. When the mounting rod moves to the limit groove on the fixed block, the squeezing force of the limit block by the fixed block disappears, the spring pops out the limit block, and the limit block is stuck in the limit groove, thereby fixing the mounting rod and the projection screen, and effectively improving the stability of the projection screen.

[0004] In response to the above-mentioned disclosed patent content, a guide frame is provided so that the projection screen passes through the guide frame, and a cleaning brush is provided in the guide frame so as to clean the dust or impurities attached to the surface of the projection screen. However, after the cleaning brush has been cleaning dust or impurities for a long time, the cleaning brush will become dirty, so the cleaning brush needs to be replaced. However, the cleaning brush is fixed to the guide frame by multiple bolts, which makes the disassembly process more troublesome and time-consuming, thereby reducing the efficiency of disassembly and replacement of the cleaning brush. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a mobile projection screen for exhibitions to solve the technical problem that it is inconvenient to quickly disassemble and replace the cleaning brush.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a movable projection screen for exhibitions, comprising a bottom plate, a first side plate and a second side plate are respectively installed on both sides of the top of the bottom plate, and a fixing frame is arranged between the first side plate and the second side plate, a through opening and a disassembly assembly are respectively arranged inside the fixing frame, and the disassembly assembly comprises two positioning blocks, two positioning grooves arranged on the inner wall of the through opening and a movable cavity opened inside the fixing frame, a return spring is fixed on both sides of the inside of the movable cavity, and one end of the return spring is connected to the movable block, a connecting rod is installed on one side of the movable block, and a clamping block is fixed on one end of the connecting rod, a clamping groove is opened on one side of the positioning block, a push block is also slidably connected to the inside of the movable cavity, and the outer surface of the push block is connected to a threaded column through a bearing, and two limit rods that penetrate to the outside of the fixed frame are also installed on the push block, and a cleaning brush plate is installed between the two positioning blocks.

[0007] By adopting the above technical solution, when the cleaning brush plate needs to be disassembled, the user can rotate the threaded column to move the threaded column outward and drive the push block to move. At this time, the push block no longer squeezes the movable block, and the reset spring stretches to push the movable block to reset and move.

[0008] Furthermore, a connecting block is provided on the top of the second side plate, and a rotating shaft is connected between the connecting block and the first side plate via a bearing.

[0009] By adopting the above technical solution, the connection block can be arranged in conjunction with the first side plate to support the rotating shaft, and the bearing is arranged to facilitate the rotation of the rotating shaft.

[0010] Furthermore, a cavity is opened on one side of the first side plate, a driving motor is installed on the top side of the bottom plate, and a sprocket is sleeved on the output end of the driving motor and one side of the outer wall of the rotating shaft.

[0011] By adopting the above technical solution, when the projection screen is needed, the user can start the drive motor, and the drive motor can drive the sprocket connected to its output end to rotate, and then drive the chain to rotate.

[0012] Furthermore, a chain is sleeved between the two sprockets, and the chain and the sprockets are located inside the cavity.

[0013] By adopting the above technical solution, the sprocket and the chain are prevented from being exposed to the external environment, so that the first side plate can protect the sprocket and the chain.

[0014] Furthermore, a projection screen is provided on the outer wall of the rotating shaft, and a bottom rod is installed at the bottom of the projection screen.

[0015] By adopting the above technical solution, when the rotating shaft rotates, it will roll up the projection screen, and after the projection screen is rolled up, it will pull the bottom rod to move.

[0016] Furthermore, a slide groove is provided on the outer surface of the first side plate and the outer surface of the second side plate, and a sliding block is provided inside the slide groove.

[0017] By adopting the above technical solution, the sliding block can slide inside the sliding groove, thereby guiding the bottom rod.

[0018] Furthermore, the sliding block, the first side plate and the second side plate are all provided with latch holes, and latches are inserted into the latch holes.

[0019] By adopting the above technical solution, when the slider moves down to the bottom, the user can insert the latch into the latch hole to limit the slider and prevent the slider from moving at will.

[0020] Furthermore, one side of the sliding block is connected to the bottom rod, and the bottom rod is slidably connected to the sliding groove through the sliding block.

[0021] By adopting the above technical solution, when the bottom rod moves up and down, it will drive the sliding block to slide inside the sliding groove, thereby improving the stability of the bottom rod when moving.

[0022] Furthermore, a counterweight is installed on the top of the base plate, and universal brake wheels are arranged around the bottom of the base plate.

[0023] By adopting the above technical solution, the arrangement of the counterweight block improves the stability of the base plate, while the arrangement of the universal brake wheel facilitates the movement of the projection screen.

[0024] Furthermore, a rubber pad is provided on the inner wall of the through opening, and the length and width of the through opening are both greater than the length and width of the projection screen.

[0025] By adopting the above technical solution, the projection screen can pass through the through opening, and the back of the projection screen is in contact with the rubber pad.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] The utility model is provided with a disassembly and assembly component. When the cleaning brush plate needs to be disassembled, the user can rotate the threaded column to make the threaded column move outward and drive the push block to move. At this time, the push block no longer squeezes the movable block, and the reset spring stretches to push the movable block to reset and move. The movable block drives the clamping block to move, so that the clamping block is moved out of the clamping slot. At this time, the clamping block no longer limits the positioning block, and then the user can take out the cleaning brush plate. When installing the cleaning brush plate, first put the cleaning brush plate into the through opening, align the positioning block on the cleaning brush plate with the positioning slot, and then push the cleaning brush plate to make the positioning block clamp. The two movable blocks are moved simultaneously, and the movable block drives the clamping block to move through the connecting rod, so that the clamping block is clamped into the inside of the clamping slot, so as to limit and fix the positioning block to prevent the positioning block from moving out of the positioning slot, thereby completing the installation of the cleaning brush plate. In this way, the cleaning brush plate can be quickly replaced, so that the dirty cleaning brush plate can be taken out from the through port in time, and there is no need to use multiple bolts to fix it. The disassembly and assembly process is simple and convenient, thereby improving the efficiency of disassembly and assembly of the cleaning brush plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall front section structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the projection screen of the utility model;

[0031] Figure 4 It is a schematic diagram of a partial structure of a fixed frame in a top section of the utility model;

[0032] Figure 5 For the utility model Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 6 It is a schematic diagram of the three-dimensional partial structure of the cleaning brush plate of the utility model;

[0034] Figure 7 It is a schematic diagram of the partial structure of the slider in a front section of the utility model.

[0035] In the figure: 1, bottom plate; 2, universal brake wheel; 3, counterweight; 4, first side plate; 5, cavity; 6, drive motor; 7, sprocket; 8, chain; 9, disassembly and assembly components; 901, movable cavity; 902, movable block; 903, push block; 904, threaded column; 905, return spring; 906, connecting rod; 907, clamping block; 908, positioning block; 909, clamping groove; 910, positioning groove; 911, limit rod; 10, rotating shaft; 11, projection screen; 12, fixing frame; 13, connecting block; 14, slide groove; 15, slider; 16, latch hole; 17, latch; 18, bottom rod; 19, through port; 20, rubber pad; 21, cleaning brush plate; 22, second side plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0037] The following describes an embodiment of the utility model based on its overall structure.

[0038] Embodiment 1:

[0039] A mobile projection screen for exhibition, such as Figure 1-Figure 7 As shown, it includes a base plate 1, and the first side plate 4 and the second side plate 22 are respectively installed on both sides of the top of the base plate 1, and a fixing frame 12 is provided between the first side plate 4 and the second side plate 22, and the interior of the fixing frame 12 is respectively provided with a through opening 19 and a disassembly assembly component 9, and a connecting block 13 is provided on the top of the second side plate 22, and a rotating shaft 10 is connected between the connecting block 13 and the first side plate 4 through a bearing, and the setting of the connecting block 13 can cooperate with the first side plate 4 to support the rotating shaft 10, and the setting of the bearing facilitates the rotation of the rotating shaft 10.

[0040] See also Figure 1-Figure 4 A cavity 5 is provided on one side of the first side plate 4, and a driving motor 6 is installed on the top side of the bottom plate 1. A sprocket 7 is sleeved on the output end of the driving motor 6 and one side of the outer wall of the rotating shaft 10. When the projection screen 11 is needed, the user can start the driving motor 6. The driving motor 6 can drive the sprocket 7 connected to its output end to rotate, and then drive the chain 8 to rotate. A chain 8 is sleeved between the two sprockets 7. The chain 8 and the sprocket 7 are located inside the cavity 5 to prevent the sprocket 7 and the chain 8 from being exposed to the external environment, so that the first side plate 4 can protect the sprocket 7 and the chain 8.

[0041] See also Figure 1-Figure 3A projection screen 11 is also provided on the outer wall of the rotating shaft 10, and a bottom rod 18 is installed at the bottom of the projection screen 11. When the rotating shaft 10 rotates, it will roll up the projection screen 11. After the projection screen 11 is rolled up, it will pull the bottom rod 18 to move. A counterweight block 3 is installed on the top of the bottom plate 1, and universal brake wheels 2 are provided around the bottom of the bottom plate 1. The setting of the counterweight block 3 improves the stability of the bottom plate 1, and the setting of the universal brake wheel 2 facilitates the movement of the projection screen. A rubber pad 20 is also provided on the inner wall of the through opening 19. The length and width of the through opening 19 are both greater than the length and width of the projection screen 11, so that the projection screen 11 can pass through the through opening 19 and make the back of the projection screen 11 contact with the rubber pad 20.

[0042] Specifically, the disassembly assembly 9 includes two positioning blocks 908, two positioning grooves 910 provided on the inner wall of the through opening 19, and a movable cavity 901 provided inside the fixed frame 12. The positioning blocks 908 are adapted to the positioning grooves 910 so that the positioning blocks 908 can be inserted into the positioning grooves 910, thereby positioning the cleaning brush plate 21. Return springs 905 are fixed on both sides of the movable cavity 901, and one end of the return spring 905 is connected to the movable block 902, and a connecting rod 906 is installed on one side of the movable block 902. A clamping block 907 is fixed at one end of the connecting rod 906. When the cleaning brush plate 21 needs to be disassembled, the user can rotate the threaded column 904 to move the threaded column 904 outward and drive the push block 903 to move. At this time, the push block 903 no longer squeezes the movable block 902, and the reset spring 905 stretches to push the movable block 902 to reset and move. The movable block 902 is slidably connected to the movable cavity 901, and one side of the movable block 902 contacts one side of the push block 903, so that when the push block 903 moves, it can push the movable block 902 to move.

[0043] Specifically, a slot 909 is provided on one side of the positioning block 908, and the positioning block 907 is adapted to the slot 909. When the positioning block 907 is inserted into the slot 909, the positioning block 908 can be limited to prevent the positioning block 908 from moving out of the positioning slot 910 at will. A push block 903 is also slidably connected to the interior of the movable cavity 901, and a threaded column 904 is connected to the outer surface of the push block 903 through a bearing. One end of the threaded column 904 extends to the outside of the fixed frame 12 and is connected to a knob. The threaded column 904 is threadedly connected to the fixed frame 12, which is convenient for the user to rotate the threaded column 904 through the knob, so that the threaded column 904 can drive the push block 903 to move when it moves, and two limit rods 911 that penetrate the outside of the fixed frame 12 are also installed on the push block 903. A cleaning brush plate 21 is installed between the two positioning blocks 908, and the setting of the cleaning brush plate 21 can clean the dust attached to the surface of the projection screen 11.

[0044] Embodiment 2:

[0045] On the basis of the above-mentioned first embodiment, in order to improve the stability of the bottom rod 18 when it moves, it is necessary to guide the bottom rod 18, so the following structure is set.

[0046] See also Figure 1 , Figure 2 and Figure 7 A slide groove 14 is provided on the outer surface of the first side plate 4 and the outer surface of the second side plate 22. A slider 15 is provided inside the slide groove 14. The slider 15 can slide inside the slide groove 14 to guide the bottom rod 18. One side of the slider 15 is connected to the bottom rod 18. The bottom rod 18 is slidably connected to the slide groove 14 through the slider 15. When the bottom rod 18 moves up and down, it will drive the slider 15 to slide inside the slide groove 14, thereby improving the stability of the bottom rod 18 when moving.

[0047] Embodiment three:

[0048] On the basis of the above-mentioned first embodiment, after the bottom rod 18 moves to a suitable position, it is necessary to limit the bottom rod 18 to prevent the bottom rod 18 from moving at will, so the following structure is set.

[0049] See also Figure 7 A latch hole 16 is provided on the slider 15, the first side plate 4 and the second side plate 22, and a latch 17 is inserted into the latch hole 16. When the slider 15 moves down to the bottom, the user can insert the latch 17 into the latch hole 16 to limit the slider 15, and then limit the bottom rod 18 to prevent the slider 15 from moving at will.

[0050] The working principle of the utility model is as follows: first, the user can move the projection screen into the exhibition hall through the universal brake wheel 2, and start the driving motor 6 when in use. The driving motor 6 can drive the sprocket 7 connected to the output end to rotate, and then drive another sprocket 7 to rotate through the chain 8, and then drive the rotating shaft 10 to rotate. After the rotating shaft 10 rotates, the projection screen 11 can be lowered, and the bottom rod 18 moves downward, and the slider 15 slides inside the slide groove 14. When the bottom rod 18 moves to the bottom, the latch 17 can be inserted into the latch hole 16 to position the slider 15 and limit the bottom rod 18. At this time, the projection screen 11 can be unfolded and used;

[0051] When the projection screen 11 is used and needs to be put away, the drive motor 6 can be started to make the sprocket 7 rotate in the opposite direction, thereby making the rotating shaft 10 rotate in the opposite direction, so as to put away the projection screen 11. When the projection screen 11 is put away, the cleaning brush plate 21 can clean and scrape away the dust or impurities attached to the surface of the projection screen 11;

[0052] When the cleaning brush plate 21 needs to be removed, the user can rotate the threaded column 904 to move the threaded column 904 outward and drive the push block 903 to move. At this time, the push block 903 no longer squeezes the movable block 902, and the reset spring 905 stretches to push the movable block 902 to reset and move. The movable block 902 drives the clamping block 907 to move, so that the clamping block 907 is moved out of the clamping slot 909. At this time, the clamping block 907 no longer limits the positioning block 908, and then the user can take out the cleaning brush plate 21. When installing the cleaning brush plate 21, first put the cleaning brush plate 21 into the through opening 19 and make the positioning block 908 on the cleaning brush plate 21 Block 908 is aligned with the positioning groove 910, and then the cleaning brush plate 21 is pushed so that the positioning block 908 is inserted into the positioning groove 910, and then the threaded column 904 is rotated in the opposite direction to move the push block 903 inward and push the two movable blocks 902 to move at the same time. The movable block 902 drives the card block 907 to move through the connecting rod 906, so that the card block 907 is inserted into the card groove 909, so as to limit and fix the positioning block 908 to prevent the positioning block 908 from moving out of the positioning groove 910, thereby completing the installation of the cleaning brush plate 21. In this way, the cleaning brush plate 21 can be quickly replaced.

[0053] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A mobile projection screen for exhibition, comprising a bottom plate (1), characterized in that: A first side plate (4) and a second side plate (22) are respectively installed on both sides of the top of the bottom plate (1), and a fixed frame (12) is provided between the first side plate (4) and the second side plate (22), and a through opening (19) and a disassembly assembly (9) are respectively provided inside the fixed frame (12), and the disassembly assembly (9) comprises two positioning blocks (908), two positioning grooves (910) provided on the inner wall of the through opening (19), and an active cavity (901) opened inside the fixed frame (12), and a return spring (905) is fixed on both sides of the inside of the active cavity (901), and one end of the return spring (905) is A movable block (902) is connected, a connecting rod (906) is installed on one side of the movable block (902), and a clamping block (907) is fixed on one end of the connecting rod (906), a clamping groove (909) is opened on one side of the positioning block (908), a push block (903) is slidably connected to the inside of the movable cavity (901), and the outer surface of the push block (903) is connected to a threaded column (904) through a bearing, and two limit rods (911) are installed on the push block (903) and penetrate to the outside of the fixed frame (12), and a cleaning brush plate (21) is installed between the two positioning blocks (908).

2. The mobile projection screen for exhibition according to claim 1, characterized in that: A connecting block (13) is provided on the top of the second side plate (22), and a rotating shaft (10) is connected between the connecting block (13) and the first side plate (4) via a bearing.

3. The mobile projection screen for exhibition according to claim 2, characterized in that: A cavity (5) is provided on one side of the first side plate (4), a driving motor (6) is installed on one side of the top of the bottom plate (1), and a sprocket (7) is sleeved on the output end of the driving motor (6) and one side of the outer wall of the rotating shaft (10).

4. The mobile projection screen for exhibition according to claim 3, characterized in that: A chain (8) is sleeved between the two sprocket wheels (7), and the chain (8) and the sprocket wheels (7) are located inside the cavity (5).

5. The mobile projection screen for exhibition according to claim 2, characterized in that: A projection screen (11) is also provided on the outer wall of the rotating shaft (10), and a bottom rod (18) is installed at the bottom of the projection screen (11).

6. The mobile projection screen for exhibition according to claim 5, characterized in that: The outer surface of the first side plate (4) and the outer surface of the second side plate (22) are both provided with a slide groove (14), and a sliding block (15) is arranged inside the slide groove (14).

7. The movable projection screen for exhibition according to claim 6, characterized in that: The slider (15), the first side plate (4) and the second side plate (22) are all provided with a latch hole (16), and a latch (17) is inserted into the latch hole (16).

8. The movable projection screen for exhibition according to claim 6, characterized in that: One side of the sliding block (15) is connected to a bottom rod (18), and the bottom rod (18) is slidably connected to the sliding groove (14) through the sliding block (15).

9. The mobile projection screen for exhibition according to claim 1, characterized in that: A counterweight block (3) is installed on the top of the base plate (1), and universal brake wheels (2) are arranged around the bottom of the base plate (1).

10. The mobile projection screen for exhibition according to claim 1, characterized in that: The inner wall of the through opening (19) is also provided with a rubber pad (20), and the length and width of the through opening (19) are both greater than the length and width of the projection screen (11).

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