Disassembling and assembling structure of projection screen

Abstract

The utility model relates to the technical field of projection screens, in particular to a dismounting structure of a projection screen, which comprises a frame, a rotating shaft rotatably mounted on the inner side of the frame, a wind-up roller fixedly mounted on the rotating shaft, a projection screen connected to the wind-up roller in a rolling manner, a counterweight cross bar fixedly mounted at the bottom of the projection screen, and sliding cylinders slidably mounted at two ends of the counterweight cross bar. Telescopic rods are arranged on the two sides of the frame, second threaded cylinders are fixedly installed at the bottoms of the telescopic rods, and stabilizing assemblies are arranged at the inner side ends of the second threaded cylinders; the stabilizing assembly comprises a cylinder, the outer side end of the cylinder is fixedly connected with a threaded rod, and the inner side end of the cylinder is fixedly provided with a permanent magnet. According to the utility model, the two ends of the lower side of the projection curtain can be effectively adsorbed and fixed by using the magnetic attraction effect through the arranged stabilizing assembly, the projection curtain is prevented from shaking in use, in addition, the whole stabilizing assembly has two installation modes of screw joint and vacuum adsorption, the installation modes can be selected according to field conditions, and the practicability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of projection screens, in particular to a disassembly and assembly structure of a projection screen. Background Art

[0002] A projection screen, also known as a projection screen cloth, is a tool for displaying image and video files, and is widely used in cinemas, offices, home theaters, large conferences and other occasions.

[0003] The utility model patent with the authorized announcement number CN211086906U discloses a projection screen with a novel structure, including a buffer base, a curtain box, a curtain main body and a reflection layer. A rotating shaft is horizontally arranged inside the curtain box, and the curtain main body is wound around the rotating shaft. A bottom cloth layer is arranged on one side inside the curtain main body, and a reflection layer is arranged on one side of the bottom cloth layer. Protrusions are uniformly fixed inside the reflection layer. A viewing angle control film is arranged on the other side inside the curtain main body, and a base material layer is arranged between the viewing angle control film and the reflection layer. One end of the curtain main body passes through the curtain box, and a pull rod passes through one end of the curtain main body. A driving motor is fixed at one end of the top of the curtain box, and buffer bases are welded at the bottom ends of the sleeves.

[0004] In the above patent, since the curtain main body is a hanging type rolled curtain, the shaking amplitude is relatively large and the stability is poor when affected by wind in daily use. Therefore, we propose a disassembly and assembly structure of a projection screen to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the defects in the prior art, and a disassembly and assembly structure of a projection screen is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A disassembly and assembly structure of a projection screen includes a frame. A rotating shaft is rotatably installed inside the frame. A winding roller is fixedly installed on the rotating shaft. A projection screen is wound on the winding roller. A counterweight cross bar is fixedly installed at the bottom of the projection screen. Slide cylinders are slidably installed at both ends of the counterweight cross bar. Telescopic rods are arranged on both sides of the frame. A second threaded cylinder is fixedly installed at the bottom of the telescopic rod. A stabilizing component is arranged at the inner end of the second threaded cylinder; the stabilizing component includes a cylinder. A threaded rod is fixedly connected to the outer end of the cylinder. A permanent magnet block is fixedly installed at the inner end of the cylinder. A connecting block is fixedly connected to the rear side of the cylinder. A vacuum suction cup is fixedly installed at the rear end of the connecting block.

[0008] Preferably, mounting plates are fixedly connected to the upper and lower sides of the frame, and mounting holes are evenly formed in the mounting plates.

[0009] Preferably, the frame is a U-shaped group frame.

[0010] Preferably, a driving motor is fixedly installed on the side of the frame, and the driving motor is connected to the rotating shaft coupling.

[0011] Preferably, side plates are fixedly installed on both sides of the frame, a first threaded cylinder is fixedly installed at the bottom of the side plate, and the upper end of the telescopic rod is screwed to the first threaded cylinder.

[0012] Preferably, a limiting screw rod is screwed and installed on the side wall of the telescopic rod.

[0013] Preferably, an electromagnet is fixedly installed inside the frame, the cross-sectional area of the electromagnet is larger than that of the sliding cylinder, and the sliding cylinder is made of iron alloy material.

[0014] Preferably, a ring is provided on the permanent magnet block, and the inner diameter of the ring is slightly larger than the outer diameter of the sliding cylinder.

[0015] Compared with the related art, a disassembly and assembly structure of a projection screen proposed by the present utility model has the following beneficial effects:

[0016] In the present utility model, in the disassembly and assembly structure of a projection screen, through the set stabilizing component, a permanent magnet block is arranged at the inner end of the cylinder in the stabilizing component. By using the magnetic attraction effect, the sliding cylinder at the end of the counterweight cross bar can be adsorbed on the permanent magnet block, providing an effective fixing effect for the lower ends of both sides of the projection screen. At the same time, a threaded rod is fixedly connected to the outer end of the cylinder, and the threaded rod can be screwed and installed at the bottom of the telescopic rod. In addition, a vacuum suction cup is also provided at the rear of the cylinder. When the wall surface at the rear of the projection screen is clean and flat, the telescopic rods on both sides of the frame can be cancelled at this time, and the entire stabilizing component can be directly adsorbed on the rear wall surface through the vacuum suction cup at the rear, saving the trouble of installing the telescopic rods and improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic perspective view of a disassembly and assembly structure of a projection screen proposed by the present utility model Figure 1 ;

[0018] Figure 2 is a schematic perspective view of a disassembly and assembly structure of a projection screen proposed by the present utility model Figure 2 ;

[0019] Figure 3 Figure 2 is an enlarged schematic view of part A in

[0020] Figure 4 is Figure 3 a schematic perspective view of the disassembly of the three-dimensional structure.

[0021] In the figure: 1. Frame; 2. Mounting plate; 3. Mounting hole; 4. Rotating shaft; 5. Winding roller; 6. Projection screen; 7. Counterweight crossbar; 71. Sliding cylinder; 8. Driving motor; 9. Side plate; 10. First threaded cylinder; 11. Telescopic rod; 111. Second threaded cylinder; 12. Limit screw; 13. Stabilizing assembly; 131. Cylinder; 132. Threaded rod; 133. Permanent magnet block; 134. Ring; 135. Connecting block; 136. Vacuum suction cup; 14. Electromagnet Detailed implementation mode

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and the implementation mode.

[0023] Refer to Figures 1-4 and, please refer to in combination Figures 1-4 wherein Figure 1 is a schematic three-dimensional structure diagram of a disassembly and assembly structure of a projection screen proposed by the present utility model Figure 1 ; Figure 2 is a schematic three-dimensional structure diagram of a disassembly and assembly structure of a projection screen proposed by the present utility model Figure 2 ; Figure 3 Figure 2 An enlarged schematic diagram of part A in Figure 4 is Figure 3 A disassembly schematic three-dimensional structure diagram. A disassembly and assembly structure of a projection screen includes: a frame 1, the frame 1 is a U-shaped frame, a rotating shaft 4 is rotatably installed inside the frame 1, a winding roller 5 is fixedly installed on the rotating shaft 4, a projection screen 6 is wound on the winding roller 5, a counterweight crossbar 7 is fixedly installed at the bottom of the projection screen 6, sliding cylinders 71 are slidably installed at both ends of the counterweight crossbar 7, telescopic rods 11 are arranged on both sides of the frame 1, a second threaded cylinder 111 is fixedly installed at the bottom of the telescopic rod 11, and a stabilizing assembly 13 is arranged at the inner end of the second threaded cylinder 111.

[0024] In this mode, the stabilizing assembly 13 includes a cylinder 131, a threaded rod 132 is fixedly connected to the outer end of the cylinder 131, a permanent magnet block 133 is fixedly installed at the inner end of the cylinder 131, a connecting block 135 is fixedly connected to the rear side of the cylinder 131, and a vacuum suction cup 136 is fixedly installed at the rear end of the connecting block 135.

[0025] Through the above settings, the permanent magnet block 133 can provide a magnetic adsorption effect. When the projection screen 6 is unfolded, the entire stabilizing assembly 13 is lowered to both sides of the counterweight crossbar 7, and then under the magnetic attraction, the sliding cylinders 71 at both ends of the counterweight crossbar 7 are adsorbed to the permanent magnet block 133, forming an effective adsorption and fixing effect, improving the stability of the projection screen 6 during use.

[0026] In this mode, mounting plates 2 are fixedly connected to the upper and lower sides of the frame 1, and mounting holes 3 are uniformly formed in the mounting plates 2.

[0027] Through the above settings, the frame 1 can be screwed and installed on the main structure wall through the mounting plate 2.

[0028] In this method, a driving motor 8 is fixedly installed on the side of the frame 1, and the driving motor 8 is connected to the rotating shaft 4 through a coupling.

[0029] Through the above settings, when the driving motor 8 rotates, the driving motor 8 drives the rotating shaft 4 to rotate, and then drives the winding roller 5 to rotate. When the winding roller 5 rotates, it can wind and lower the projection screen 6 wound on the winding roller 5.

[0030] In this method, side plates 9 are fixedly installed on both sides of the frame 1, and a first threaded cylinder 10 is fixedly installed at the bottom of the side plates 9. The upper end of the telescopic rod 11 is screwed to the first threaded cylinder 10.

[0031] Through the above settings, the telescopic rod 11 is fixed on both sides of the frame 1 by screwing. Therefore, when the telescopic rod 11 is not in use, it can be unscrewed from both sides of the frame 1, which is convenient for daily disassembly and installation work.

[0032] In this method, a limit screw 12 is screwed on the side wall of the telescopic rod 11.

[0033] Through the above settings, by tightening the limit screw 12, the inner end of the limit screw 12 forms an abutting effect with the inside of the telescopic rod 11, which can limit the telescopic freedom of the telescopic rod 11, and then make the fixed height of the stable component 13 at the bottom of the telescopic rod 11 stable.

[0034] In this method, an electromagnet 14 is fixedly installed inside the frame 1. The cross-sectional area of the electromagnet 14 is larger than that of the sliding cylinder 71, and the sliding cylinder 71 is made of ferrous alloy material.

[0035] Through the above settings, the setting of the electromagnet 14 makes the sliding cylinders 71 on both sides of the counterweight cross bar 7 at the bottom of the projection screen 6 automatically adsorbed on the electromagnet 14 under the magnetic attraction when the winding roller 5 finishes winding the projection screen 6, avoiding the shaking of the counterweight cross bar 7.

[0036] In this method, a ring 134 is provided on the permanent magnet block 133, and the inner diameter of the ring 134 is slightly larger than the outer diameter of the sliding cylinder 71.

[0037] Through the above settings, the setting of the ring 134 enables the sliding cylinder 71 to be adsorbed on the end of the permanent magnet block 133 and the sliding cylinder 71 to be inserted into the inner side of the ring 134, avoiding the side slip of the sliding cylinder 71 and improving the stable effect of magnetic adsorption.

[0038] The working principle of a disassembly and assembly structure of a projection screen provided by the present utility model is as follows:

[0039] In use, the device is screwed and fixed to the stressed structure by inserting bolts into the mounting holes 3. When using the projection screen 6, the telescopic rod 11 is screwed and installed inside the first threaded cylinder 10. Subsequently, the current of the electromagnet 14 is disconnected, causing the electromagnet 14 to lose its magnetic attraction. Then, the driving motor 8 is started to drive the winding roller 5 to lower the projection screen 6. After the projection screen 6 is lowered in place, the elongation length of the telescopic rod 11 is adjusted so that the cylinder 131 inside the telescopic rod 11 aligns with the counterweight cross bar 7 at the bottom of the projection screen 6, and the sliding cylinder 71 at the end of the counterweight cross bar 7 is aligned with the permanent magnet block 133. Under the magnetic attraction of the permanent magnet block 133, the sliding cylinder 71 slides outwards and adsorbs on the permanent magnet block 133, improving the stability of the projection screen 6 during use. When the wall surface behind the projection screen 6 is clean and flat with good conditions, the telescopic rods 11 on both sides of the frame 1 can be removed at this time, and the entire stabilizing assembly 13 can be directly adsorbed on the rear wall surface through the vacuum suction cups 136 at the rear, saving the trouble of installing the telescopic rods 11.

[0040] Compared with the related art, a disassembly and assembly structure of a projection screen provided by the present utility model has the following beneficial effects:

[0041] For a disassembly and assembly structure of a projection screen provided by the present utility model, through the provided stabilizing assembly 13, the lower ends of both sides of the projection screen 6 can be effectively adsorbed and fixed by magnetic attraction, avoiding the shaking of the projection screen 6 during use. In addition, the entire stabilizing assembly 13 has two installation methods, namely screwing and vacuum adsorption, and the installation method can be selected according to the on-site conditions, enhancing the practicability.

[0042] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A disassembly and assembly structure of a projection screen, characterized in that It includes a frame (1), a rotating shaft (4) is rotatably installed inside the frame (1), a winding roller (5) is fixedly installed on the rotating shaft (4), a projection screen (6) is wound on the winding roller (5), a counterweight cross bar (7) is fixedly installed at the bottom of the projection screen (6), sliding cylinders (71) are slidably installed at both ends of the counterweight cross bar (7), telescopic rods (11) are arranged on both sides of the frame (1), a second threaded cylinder (111) is fixedly installed at the bottom of the telescopic rod (11), and a stabilizing component (13) is arranged at the inner end of the second threaded cylinder (111); The stabilizing component (13) includes a cylinder (131), a threaded rod (132) is fixedly connected to the outer end of the cylinder (131), a permanent magnet block (133) is fixedly installed at the inner end of the cylinder (131), a connecting block (135) is fixedly connected to the rear side of the cylinder (131), and a vacuum suction cup (136) is fixedly installed at the rear end of the connecting block (135).

2. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, Mounting plates (2) are fixedly connected to the upper and lower sides of the frame (1), and mounting holes (3) are evenly formed in the mounting plates (2).

3. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, The frame (1) is a U-shaped combined frame.

4. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, A driving motor (8) is fixedly installed on the side of the frame (1), and the driving motor (8) is connected to the rotating shaft (4) through a coupling.

5. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, Side plates (9) are fixedly installed on both sides of the frame (1), a first threaded cylinder (10) is fixedly installed at the bottom of the side plate (9), and the upper end of the telescopic rod (11) is screwed to the first threaded cylinder (10).

6. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, A limiting screw rod (12) is screwed and installed on the side wall of the telescopic rod (11).

7. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, An electromagnet (14) is fixedly installed inside the frame (1), the cross-sectional area of the electromagnet (14) is larger than that of the sliding cylinder (71), and the sliding cylinder (71) is made of ferrous alloy material.

8. The disassembly and assembly structure of a projection screen according to claim 1, characterized in that, A ring (134) is arranged on the permanent magnet block (133), and the inner diameter of the ring (134) is slightly larger than the outer diameter of the sliding cylinder (71).

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