Split type anti-indentation rolling assembly for projection curtain

Abstract

The utility model relates to the technical field of projection curtains, in particular to a split type anti-indentation rolling assembly for a projection curtain, which comprises a support rolling module, and the support rolling module is round and comprises a sleeve hole for sleeving an upper reel and an outer rolling surface for rolling the curtain. A curtain through groove is formed between the sleeve hole and the outer winding face and used for allowing the curtain to penetrate through. The supporting and limiting module comprises an arc-shaped limiting groove corresponding to the outer winding surface and a winding shaft supporting groove capable of supporting a lower winding shaft, and the winding shaft supporting groove and the lower connecting surface of the arc-shaped limiting groove form a curtain traction surface. According to the split type anti-indentation winding assembly, the upper winding shaft, the curtain and the lower winding shaft can be isolated and supported independently, the problem that indentation is generated on the curtain due to the fact that the curtain is affected by the pressure of the winding shafts in the traditional storage process is solved while winding of the curtain is achieved, and the projection quality is ensured when the curtain is used.

Description

Technical Field

[0001] This utility model relates to the field of projection screen technology, and in particular to a split-type anti-dent rewind assembly for projection screens. Background Technology

[0002] A projection screen is a display medium specifically designed to receive and reflect / transmit light from a projector. Working in conjunction with a projection device, it presents images or video content to the audience with higher brightness, contrast, and color fidelity. Essentially, it enhances the quality of the projected image by optimizing the directional reflection or transmission characteristics of light through special materials and structures.

[0003] In a flat screen curtain system, the upper and lower rollers work together. When the curtain needs to be retracted, the upper roller rotates to wind the curtain around its surface, allowing it to be rolled up vertically or horizontally. The lower roller is usually equipped with a counterweight or support rod, which uses gravity or mechanical limiting devices to straighten the bottom of the curtain and prevent it from sagging and wrinkling due to its own weight.

[0004] When a screen is in a bent state for a long time, the internal fibers of the material (such as PVC or fiberglass) will experience stress relaxation, leading to a decrease in the elastic modulus and making it more susceptible to plastic deformation under the weight of the roll. Taking fiberglass screens as an example, the difference in the coefficient of thermal expansion between the substrate and the coating (such as a gray coating) may cause micro-misalignment and compression between the roll and the screen under temperature fluctuations, forming periodic indentations. The solution is to ensure that the upper and lower rolls, except at the connection points with the screen, do not come into contact with the screen after winding. However, there are currently no devices on the market that can achieve this.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to overcome the problems of the prior art and provide a split-type anti-dent rewinding assembly for projection screens, which solves the technical problem that existing projection screens, when rolled up, undergo plastic deformation under the weight of the roll, resulting in indentations.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A split-type anti-dent rewind assembly for projection screens includes:

[0009] A support winding module is circular and includes a sleeve hole for fitting an upper winding shaft and an outer winding surface for winding the curtain. A curtain through groove is provided between the sleeve hole and the outer winding surface for the curtain to pass through.

[0010] The support and limiting module includes an arc-shaped limiting groove corresponding to the outer roll surface and a roll support groove that can support the lower roll. The lower connecting surface of the roll support groove and the arc-shaped limiting groove constitutes the curtain traction surface.

[0011] Furthermore, it also includes a winding and retaining frame, which has limiting and retaining holes that match the cross-sectional shape of the projection screen in the winding state.

[0012] Furthermore, a tension groove is provided near the lower winding shaft of the limiting retaining hole, which can pass through the winding retaining frame.

[0013] Furthermore, the sleeve hole is located at the center of the support winding module.

[0014] Furthermore, the screen channel is arc-shaped, including a channel arc-shaped convex surface that can pull and support the back of the screen, and a channel arc-shaped concave surface that limits the front of the screen.

[0015] Furthermore, the width of the screen groove is greater than the thickness of the screen.

[0016] Furthermore, the curvature of the arc-shaped limiting groove is equal to the curvature of the outer rolled surface.

[0017] Furthermore, both the support winding module and the support limiting module have cavities inside.

[0018] Furthermore, the support winding module and the support limiting module are made of the same material, namely foam material.

[0019] Furthermore, the support winding module and the support limiting module are made of the same material, namely, a soft elastomer material.

[0020] This invention provides a split-type anti-dent rewind assembly for projection screens. A supporting rewind module provides support for the upper reel and rewinds the screen, ensuring effective isolation between the two. A supporting limiting module supports the lower reel and provides traction for the screen. This split-type anti-dent rewind assembly achieves independent isolation and support for the upper reel, screen, and lower reel. While rewinding the screen, it avoids the problem of indentations on the screen caused by the pressure of the reel during traditional storage, ensuring the projection quality during screen use. Attached Figure Description

[0021] Figure 1 This is a first-view structural diagram of the supporting winding module in a split-type anti-dent winding assembly for a projection screen according to the present invention.

[0022] Figure 2 This is a second-view structural diagram of the supporting winding module in a split-type anti-dent winding assembly for projection screens according to the present invention.

[0023] Figure 3 This is a third-view structural diagram of the supporting winding module in a split anti-dent winding assembly for a projection screen according to the present invention.

[0024] Figure 4 This is a first-view structural diagram of the support and limiting module in a split-type anti-indentation winding assembly for a projection screen according to the present invention.

[0025] Figure 5 This is a second-view structural diagram of the support and limiting module in a split-type anti-indentation winding assembly for a projection screen according to the present invention.

[0026] Figure 6 This is a third-view structural diagram of the support and limiting module in a split-type anti-indentation winding assembly for a projection screen according to the present invention.

[0027] Figure 7 This is a schematic diagram of a split-type anti-dent rewind assembly for a projection screen, a roller, and the rewind state of the screen, as described in this utility model.

[0028] Figure 8 This is a schematic diagram illustrating the use of a split-type anti-dent rewind assembly for projection screens, as described in this utility model, in conjunction with a rewind holding frame.

[0029] Illustration markings:

[0030] 1-Support winding module, 101-Sleeve hole, 102-Outer winding surface, 103-Curtain through groove, 104-Through groove arc-shaped convex surface, 105-Through groove arc-shaped concave surface;

[0031] 2-Support limiting module, 201-Arc-shaped limiting groove, 202-Roller support groove, 203-Curtain traction surface;

[0032] 3-Rewinding retaining frame, 301-Limit retaining hole, 302-Tightening groove;

[0033] 4- Upper roll;

[0034] 5-Lower roll;

[0035] 6-Curtain;

[0036] 7-Projection screen. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] like Figures 1-6 As shown, this solution provides a split-type anti-dent rewind assembly for projection screens, including:

[0039] The support winding module 1 is circular and includes a sleeve hole 101 for fitting the upper roller 4 and an outer winding surface 102 for winding the curtain 6. A curtain through groove 103 is provided between the sleeve hole 101 and the outer winding surface 102 for the curtain 6 to pass through.

[0040] The support limiting module 2 includes an arc-shaped limiting groove 201 corresponding to the outer roll surface 102, and a roll support groove 202 that can support the lower roll 5. The lower connecting surface of the roll support groove 202 and the arc-shaped limiting groove 201 constitutes the curtain traction surface 203.

[0041] Working principle:

[0042] With the projection screen 7 in the unfolded state, the sleeve hole 101 of the support and winding module 1 is pre-fitted onto one end of the upper roller 4, ensuring that the screen 6 adjacent to the upper roller 4 can enter the screen through groove 103; then the screen 6 is wound up along the outer winding surface 102 of the support and winding module 1. At this time, the first layer of screen 6 will be attached to the outer winding surface 102, and the remaining layers will be intertwined and superimposed to achieve the purpose of winding up the planar screen.

[0043] When the length of the unrolled curtain 6 is slightly greater than the curtain traction surface 203, the lower roller 5 is placed in the roller support groove 202 of the support limiting module 2, and the arc-shaped limiting groove 201 is used to limit and clamp the curtain 6 in the rolled-up state that is rolled up on the outer rolling surface 102.

[0044] Check the tension of the portion of the curtain 6 connected to the lower roller 5 corresponding to the curtain traction surface 203:

[0045] If the section of curtain 6 is in a loose state, slightly rotate the support and winding module 1 to tighten the curtain 6 through the outer winding surface 102. Figure 7 As shown.

[0046] It should be noted that at least two of these rewinding components are required when rolling up the projection screen 7, corresponding to the left and right ends of the projection screen 7 respectively. For rolls longer than 3 meters, several more rewinding components can be added between the left and right ends to achieve strong support and rewinding of the projection screen 7, avoid deflection deformation caused by large span, and prevent the formation of "V" shaped depressions on the surface of the screen 6.

[0047] Under the above operations, the upper roller 4, the lower roller 5, and the screen 6 can be effectively separated, preventing loosening and thus enabling effective winding of the projection screen 7, avoiding indentations. Furthermore, light binding with external cable ties and direct packing facilitate subsequent transportation and other operations.

[0048] like Figure 8 As shown, as an optimization of this solution, a winding and holding frame 3 is also included. The winding and holding frame 3 has a limiting and holding hole 301 that matches the cross-sectional shape of the projection screen 7 in the winding state. The limiting and holding hole 301 is used to maintain the position of the projection screen 7 after it is wound up by the winding assembly provided by this solution. The method of use is to insert it from the left or right end of the projection screen 7 after it is wound up.

[0049] In addition, a tension groove 302 is provided near the lower roller 5 of the limiting retaining hole 301, which can pass through the winding retaining frame 3; the tension groove 302 can give the limiting retaining hole 301 a certain spatial tension, so that it can be used for a projection screen 7 with an outer shape slightly larger than the limiting retaining hole 301, to achieve a better limiting retaining effect and effectively prevent the roller from rotating freely.

[0050] like Figures 1-3 As shown, in this embodiment, the sleeve hole 101 is located at the center of the support winding module 1, thereby ensuring that the upper winding shaft 4 is located at the center of the curtain 6 after winding, and is not easily touched.

[0051] In addition, the screen channel 103 is arc-shaped, including a channel arc-shaped convex surface 104 that can pull and support the back of the screen 6, and a channel arc-shaped concave surface 105 that limits the front of the screen 6.

[0052] This structure ensures that the connecting section between the curtain 6 and the upper roller 4 is connected to the outer roll surface 102 in an arc shape, which, compared to non-arc through grooves such as straight lines, will not cause creases to the curtain.

[0053] In this embodiment, the width of the screen groove 103 is greater than the thickness of the screen 6. Under this limited structure, it can be ensured that the front of the screen 6 will not directly act on the arc-shaped concave surface 105 of the groove in the rolled-up state, thereby preventing scratches on the screen 6 and ensuring the quality of projection during use.

[0054] like Figures 4-6 As shown, the arc of the arc-shaped limiting groove 201 is equal to the arc of the outer roll-up surface 102, so that a seamless clamping can be formed between the curtain and the rolled-up curtain after the curtain is rolled up.

[0055] As an optimization of this solution, both the support winding module 1 and the support limiting module 2 have internal cavities. These cavities are filled with gas or liquid through positive pressure by injecting gas or liquid into the air nozzles located on the side of the module, i.e., the non-contact surface with the curtain. When not filled with gas or liquid, the module can be compressed and stored, saving storage space when the winding assembly is not in use.

[0056] As a description of the materials used in this component, the following are included:

[0057] In this embodiment, the support winding module 1 and the support limiting module 2 are made of the same material, namely foam material, such as EPS (expanded polystyrene), EPE (expanded polyethylene, pearl cotton), or traditional foam materials like sponge, etc.

[0058] EPS (expanded polystyrene) is a rigid foam plastic with a closed-cell structure. It is lightweight, heat-insulating, and cushioning, and is often used in packaging and building insulation.

[0059] EPE (expanded polyethylene, pearl cotton) is a soft foam material with an open or semi-open structure. It is known for its high elasticity, water resistance and environmental recyclability, and is widely used in cushioning packaging.

[0060] Traditional foam materials for sponges usually refer to polyurethane foams such as EPU, which are soft and shock-absorbing, and are commonly used in furniture, daily necessities and industrial packaging.

[0061] In this embodiment, the support winding module 1 and the support limiting module 2 are made of the same material, namely a soft elastomer material, such as soft rubber or silicone.

[0062] Soft rubber encompasses a variety of polymer elastomers, including thermoplastic elastomers (TPE) and thermoplastic polyurethanes (TPU), and features high plasticity and a soft touch, making it suitable for industrial parts, medical supplies, and more.

[0063] Silicone is an organosilicon elastomer that is heat-resistant and biocompatible, and is used in sealing medical devices, kitchenware, and electronic products.

[0064] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split anti-scrim winding assembly for a projection screen, comprising: include: Support winding module (1) is circular and includes a sleeve hole (101) for fitting the upper winding shaft (4) and an outer winding surface (102) for winding the curtain (6). A curtain through groove (103) is provided between the sleeve hole (101) and the outer winding surface (102) for the curtain (6) to pass through. The support limiting module (2) includes an arc-shaped limiting groove (201) corresponding to the outer roll surface (102) and a roll support groove (202) that can support the lower roll (5). The lower connecting surface of the roll support groove (202) and the arc-shaped limiting groove (201) constitutes the curtain traction surface (203).

2. The anti-crease winding assembly of claim 1, wherein, It also includes a winding retaining frame (3), which has a limiting retaining hole (301) that matches the cross-sectional shape of the projection screen (7) in the winding state.

3. The anti-scrim winding assembly of claim 2, wherein, The limiting retaining hole (301) is located near the lower winding shaft (5) and has a tension groove (302) that can pass through the winding retaining frame (3).

4. The anti-crease winding assembly of claim 1 or 2, wherein, The sleeve hole (101) is located at the center of the support winding module (1).

5. The anti-scrim assembly of claim 1, wherein, The screen channel (103) is arc-shaped, including a channel arc-shaped convex surface (104) that can pull and support the back of the screen (6), and a channel arc-shaped concave surface (105) that is used to limit the front of the screen (6).

6. The anti-scrim assembly of claim 5, wherein, The width of the screen through groove (103) is greater than the thickness of the screen (6).

7. The anti-scrim assembly of claim 1, wherein, The arc of the arc-shaped limiting groove (201) is equal to the arc of the outer roll surface (102).

8. The anti-scrim assembly of claim 1, wherein, Both the support winding module (1) and the support limiting module (2) have cavities inside.

9. The anti-scrim assembly of claim 1, wherein, The support winding module (1) and the support limiting module (2) are made of the same material, namely foam material.

10. The anti-scrim assembly of claim 1, wherein, The support winding module (1) and the support limiting module (2) are made of the same material, which is a soft elastomer material.

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