Integrated anti-indentation rolling module for projection curtain

Abstract

The utility model relates to the technical field of projection curtains, in particular to an integrated anti-indentation rolling module for a projection curtain, which comprises a support with a rolling sleeve cavity, and the bottom wall of the rolling sleeve cavity is provided with a curtain rolling bump and a lower reel supporting bump; an upper reel sleeve hole is formed in the curtain rolling convex block, a curtain rolling surface is formed by the outer side edge of the curtain rolling convex block, and a curtain traction groove used for pulling the curtain is formed between the curtain rolling surface and the upper reel sleeve hole; a first concave arc-shaped groove is formed in one side, facing the curtain rolling surface, of the lower reel supporting convex block; a second inner arc-shaped groove is formed in the other side of the lower reel supporting protruding block and can horizontally support the lower reel. And the lower side joint of the first concave arc-shaped groove and the second concave arc-shaped groove is used as a curtain traction surface. The integrated anti-indentation rolling module can effectively solve the problem that indentation is generated on a curtain due to the fact that the curtain is affected by the pressure of a rolling shaft in the traditional storage process.

Description

Technical Field

[0001] This utility model relates to the field of projection screen technology, and in particular to an integrated anti-dent rewinding module 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 utility model is to overcome the problems of the prior art and provide an integrated anti-dent rolling module for projection screens, which solves the technical problem that existing projection screens undergo plastic deformation and indentation under the weight of the roll when rolled up.

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

[0008] An integrated anti-dent rewinding module for projection screens includes a support with a rewinding cavity. The bottom wall of the rewinding cavity has a screen rewinding protrusion and a lower roller support protrusion. The screen rewinding protrusion has an upper roller sleeve hole for the upper roller to be fitted onto. The outer edge of the screen rewinding protrusion forms a screen rewinding surface, and a screen traction groove for pulling the screen is provided between the screen rewinding surface and the upper roller sleeve hole. The lower roller support protrusion has a first concave arc-shaped groove on one side facing the screen rewinding surface, forming an arc-shaped screen limiting channel between the first concave arc-shaped groove and the screen rewinding surface. The other side of the lower roller support protrusion has a second concave arc-shaped groove that provides horizontal support for the lower roller. The lower connection between the first and second concave arc-shaped grooves serves as the screen traction surface.

[0009] Furthermore, an upper roller insertion hole is provided on the bottom wall of the upper roller sleeve hole, which allows the end of the upper roller to be inserted, and a lower roller insertion hole is provided on the bottom wall of the second inner arc groove, which allows the end of the lower roller to be inserted.

[0010] Furthermore, the curtain traction groove is arc-shaped, including an arc-shaped convex surface of the traction groove that can pull and support one side of the curtain, and an arc-shaped concave surface of the traction groove that is used to limit the other side of the curtain.

[0011] Furthermore, the height of the curtain rewinding protrusion is the same as that of the lower roller support protrusion.

[0012] Furthermore, the heights of both the curtain winding protrusion and the lower roller support protrusion are greater than the depth of the winding sleeve cavity.

[0013] Furthermore, the heights of both the curtain winding protrusion and the lower roller support protrusion are equal to the depth of the winding sleeve cavity.

[0014] Furthermore, the heights of both the curtain winding protrusion and the lower roller support protrusion are less than the depth of the winding sleeve cavity.

[0015] Furthermore, the side of the winding sleeve cavity is provided with a tension groove that can pass through the support.

[0016] Furthermore, the curtain rewinding protrusion, the lower roller support protrusion, and the support are all made of the same material, namely foam material.

[0017] Furthermore, the curtain rewinding protrusion, the lower roller support protrusion, and the support are all made of the same material, namely, a soft elastomer material.

[0018] This utility model provides an integrated anti-dent rewind module for projection screens. By incorporating a screen rewinding protrusion within the rewind sleeve cavity, it effectively supports the upper roller and rewinds the screen, ensuring effective isolation between the two. A lower roller support protrusion within the rewind sleeve cavity supports the lower roller and facilitates the connection and traction of the screen. This integrated anti-dent rewind module achieves independent isolation and support for the upper roller, screen, and lower roller. While rewinding the screen, it avoids the problem of indentations caused by roller pressure during traditional storage, ensuring the projection quality during screen use. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an integrated anti-dent rewinding module for projection screens according to the present invention;

[0020] Figure 2 This is a cross-sectional view of an integrated anti-dent rewinding module for projection screens according to the present invention.

[0021] Figure 3 This is a schematic diagram of the internal protrusion of an integrated anti-dent rewinding module for projection screens according to the present invention.

[0022] Figure 4 This is a schematic diagram of the first structure of an integrated anti-dent rewinding module for projection screens according to the present invention.

[0023] Figure 5 This is a schematic diagram of the second structure of the support and limiting module in the integrated anti-indentation winding module for projection screens described in this utility model.

[0024] Figure 6 This is a schematic diagram of the third structure of the support and limiting module in the integrated anti-indentation winding module for projection screens described in this utility model.

[0025] Figure 7 This is a first-view schematic diagram of an integrated anti-dent rewinding module for projection screens, a roller, and the rewinding state of the screen, as described in this utility model.

[0026] Figure 8 This is a second-view schematic diagram of the integrated anti-dent rewinding module for projection screens, the roller, and the rewinding state of the screen, as described in this utility model.

[0027] Illustration markings:

[0028] 1-Support, 101-Rewinding sleeve cavity, 102-Tightening groove, 103-Upper reel insertion hole, 104-Lower reel insertion hole;

[0029] 2-Curtain retracting protrusion, 201-Upper roller sleeve hole, 202-Curtain retracting surface, 203-Curtain traction groove, 204-Arc-shaped convex surface of traction groove, 205-Arc-shaped concave surface of traction groove;

[0030] 3-Lower roll support protrusion, 301-First concave arc groove, 302-Second concave arc groove, 303-Arc-shaped curtain limiting channel, 304-Curtain traction surface;

[0031] 4- Upper roll;

[0032] 5- Lower roll;

[0033] 6-Curtain;

[0034] 7-Projection screen. Detailed Implementation

[0035] 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.

[0036] like Figures 1-3 and Figure 8 As shown, this solution provides an integrated anti-dent rewind module for projection screens, which uses two supports acting on the left and right ends of the projection screen, and each rewind cavity is set on the side of the support, thereby facilitating the installation of the projection screen; it includes a support 1 with a rewind cavity 101, and the bottom wall of the rewind cavity 101 is provided with a screen rewind protrusion 2 and a lower roller support protrusion 3.

[0037] The curtain retracting protrusion 2 has an upper roller sleeve hole 201 for the upper roller 4 to be sleeved. The outer side of the curtain retracting protrusion 2 forms the curtain retracting surface 202, and a curtain traction groove 203 for traction of the curtain 6 is provided between the curtain retracting surface 202 and the upper roller sleeve hole 201.

[0038] The lower roller support protrusion 3 has a first concave arc-shaped groove 301 on one side facing the curtain roll-up surface 202, and the first concave arc-shaped groove 301 and the curtain roll-up surface 202 form an arc-shaped curtain limiting channel 303; the other side of the lower roller support protrusion 3 has a second concave arc-shaped groove 302, which can provide horizontal support for the lower roller 5; the lower connection between the first concave arc-shaped groove 301 and the second concave arc-shaped groove 302 serves as a curtain traction surface 304, which is used to traction and support the curtain 6 adjacent to the lower roller 5.

[0039] Since the lengths of the upper roller 4 and the lower roller 5 of the projection screen 7 are both greater than the horizontal length of the screen 6 when the screen 7 is rolled up, as an optimization of this embodiment, an upper roller insertion hole 103 is provided on the bottom wall of the upper roller sleeve hole 201 for the end of the upper roller 4 to be inserted, and a lower roller insertion hole 104 is provided on the bottom wall of the second inner arc groove 302 for the end of the lower roller 5 to be inserted.

[0040] As an optimization of this solution, the curtain rewinding protrusion 2 is the center of a circle, and the upper roller sleeve hole 201 is located at the center position.

[0041] As a further optimization of this solution, the curtain rewinding protrusion 2, the lower roller support protrusion 3, and the support 1 are integrally formed and can be provided with a cavity, so as to facilitate integral forming by injecting air pressure or hydraulic pressure, and the air nozzle can be set on the outside of the support.

[0042] like Figure 3 As shown, in this embodiment, the curtain traction groove 203 is arc-shaped, including an arc-shaped convex surface 204 for traction and support of one side of the curtain 6, and an arc-shaped concave surface 205 for limiting the other side of the curtain 6. This structure ensures that the connection between the curtain 6 and the upper roller 4 is arc-shaped with the outer roll surface, preventing creases in the curtain compared to non-arc through grooves such as straight grooves. Figure 7 As shown.

[0043] In this embodiment, the height of the screen retracting protrusion 2 and the lower roller support protrusion 3 are the same. This limitation ensures that they act on the left or right end of the projection screen 7 at the same time, which facilitates precise fitting.

[0044] In addition, this embodiment also provides three structural forms, including:

[0045] like Figure 6 As shown, the heights of the curtain retracting protrusion 2 and the lower roller support protrusion 3 are both greater than the depth of the retracting sleeve cavity 101. This structure allows the operator to clearly see the positions of the curtain retracting protrusion 2 and the lower roller support protrusion 3, thus improving the efficiency of the installation.

[0046] like Figure 5 As shown, the height of the curtain retracting protrusion 2 and the lower roller support protrusion 3 are both equal to the depth of the retracting sleeve cavity 101. This structure can improve the efficiency of the sleeve installation because the operator can clearly see the position of the curtain retracting protrusion 2 and the lower roller support protrusion 3. At the same time, it can also limit and clamp the sleeved curtain 6 to the same length.

[0047] like Figure 4As shown, the heights of the curtain rewinding protrusion 2 and the lower roller support protrusion 3 are both less than the depth of the rewinding cavity. This structure can provide a longer-length limiting clamp for the sleeved curtain 6, effectively preventing the curtain 6 from loosening due to long-term rewinding and storage.

[0048] As an optimization of this solution, such as Figure 7 and Figure 8 As shown, the side of the take-up sleeve cavity 101 is provided with a tension groove 102 that can pass through the support 1; the tension groove 102 can give the take-up sleeve cavity 101 a certain spatial tension, so that it can be used for a projection screen 7 with an outer shape slightly larger than the take-up sleeve cavity 101, to achieve a better limiting and holding effect and effectively prevent the free rotation of the roll.

[0049] It should be noted that in this embodiment, the curtain rewinding protrusion 2, the lower roller support protrusion 3, and the support 1 are all 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.

[0050] 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.

[0051] EPE (expanded polyethylene) foam and pearl cotton are soft foam materials with open or semi-open structure. They are known for their high elasticity, water resistance and environmental recyclability, and are widely used in cushioning packaging.

[0052] 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.

[0053] Alternatively, the curtain retractor 2, the lower roller support protrusion 3, and the support 1 are all made of the same material, namely a soft elastomer material, such as soft rubber or silicone, wherein:

[0054] 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.

[0055] Silicone is an organosilicon elastomer that is heat-resistant and biocompatible, and is used in sealing medical devices, kitchenware, and electronic products.

[0056] 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. An integrated anti-scrim winding module for a projection screen, comprising: It includes a support (1) with a winding sleeve cavity (101), and the bottom wall of the winding sleeve cavity (101) is provided with a curtain winding protrusion (2) and a lower roller support protrusion (3). The curtain retractor (2) has an upper roller sleeve hole (201) for the upper roller (4) to be sleeved. The outer side of the curtain retractor (2) forms the curtain retractor surface (202), and a curtain traction groove (203) for traction of the curtain (6) is provided between the curtain retractor surface (202) and the upper roller sleeve hole (201). The lower roller support protrusion (3) has a first concave arc groove (301) on one side facing the curtain roll-up surface (202), and the first concave arc groove (301) and the curtain roll-up surface (202) form an arc curtain limiting channel (303); the other side of the lower roller support protrusion (3) has a second concave arc groove (302), which can provide horizontal support for the lower roller (5); the lower connection between the first concave arc groove (301) and the second concave arc groove (302) serves as the curtain traction surface (304).

2. The integrated anti-scrim winding module for a projection screen according to claim 1, wherein, An upper roller insertion hole (206) is provided on the bottom wall of the upper roller sleeve hole (201) for inserting the end of the upper roller (4), and a lower roller insertion hole (207) is provided on the bottom wall of the second concave arc groove (302) for inserting the end of the lower roller (5).

3. The integrated anti-scrim winding module for a projection screen according to claim 1 or 2, wherein, The curtain traction groove (203) is arc-shaped, including a traction groove arc-shaped convex surface (204) that can pull and support one side of the curtain (6), and a traction groove arc-shaped concave surface (205) that is used to limit the other side of the curtain (6).

4. The integrated anti-scrim winding module for a projection screen according to claim 1, wherein, The curtain retractor (2) has the same height as the lower roller support protrusion (3).

5. The integrated anti-scrim winding module for a projection screen according to claim 1 or 4, wherein, The heights of the curtain rewinding protrusion (2) and the lower roller support protrusion (3) are both greater than the depth of the rewinding cavity (101).

6. The integrated anti-scrim winding module for a projection screen according to claim 1 or 4, wherein, The heights of the curtain retracting protrusion (2) and the lower roller support protrusion (3) are both equal to the depth of the retracting sleeve cavity (101).

7. The integrated anti-scrim winding module for a projection screen according to claim 1 or 4, wherein, The heights of the curtain rewinding protrusion (2) and the lower roller support protrusion (3) are both less than the depth of the rewinding cavity.

8. The integrated anti-scrim winding module for a projection screen according to claim 1, wherein, The side of the winding sleeve cavity (101) is provided with a tension groove (102) that can pass through the support (1).

9. The integrated anti-scrim winding module for a projection screen of claim 1, wherein, The curtain rewinding protrusion (2), the lower roller support protrusion (3), and the support (1) are all made of the same material, namely foam material.

10. The integrated anti-scrim winding module for a projection screen of claim 1, wherein, The curtain rewinding protrusion (2), the lower roller support protrusion (3), and the support (1) are all made of the same material, namely, soft elastomer material.

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