Shading underbeam system

Abstract

The utility model discloses a shading underbeam system which comprises a lower round rod assembled on the inner side of the bottom of a pull-free rainbow curtain and an underbeam assembled on the outer side of the bottom of the pull-free rainbow curtain, a connecting mechanism is arranged between the lower round rod and the underbeam, a shading mechanism is arranged on the front side of the underbeam, and a balance weight mechanism is arranged on the rear side of the underbeam. The baffle is arranged on the front side of the lower beam, the gap between the lower beam and the lower round rod is shielded, the problem that light cannot be completely shielded due to the gap between the lower round rod and the lower beam is solved, the reinforcing rib used for balancing weight is arranged on the rear side of the lower beam, and the reinforcing rib generates backward acting force on the lower beam. And backward acting force generated by the baffle is offset, so that front and back stress of the lower beam is balanced, the lower beam can be kept in a stable state in the using process, and the situation that the lower beam inclines forwards under the action of the front side baffle to affect the shading performance or attractiveness of the pull-free rainbow curtain is avoided.

Description

Technical Field

[0001] This utility model relates to the field of curtain technology, and in particular to a blackout lower beam system. Background Technology

[0002] Rainbow blinds, also known as sheer blinds, zebra blinds, light-adjusting roller blinds, or double-layer roller blinds, are a type of curtain that combines aesthetics and practicality. They are made of alternating small pieces of fabric and sheer cloth of equal width. This unique design gives them both the warmth of fabric and the light-adjusting function of Venetian blinds. The double-layered fabric structure softens the light as it passes through, reducing the harshness of direct sunlight. One end of the rainbow blind is fixed, while the other end rolls up on a roller, allowing for easy adjustment of light. When the sheer cloths overlap, the light is softened; when they are staggered, they completely block out light. To fully open the blinds, simply roll them up completely.

[0003] The existing rainbow blind lower beam system on the market consists of a lower round rod and a lower beam, with both ends connected by lower beam end caps. When the blinds are raised or lowered, the round rod can rotate with the blinds. There is a gap between the round rod and the lower beam, which cannot completely block light. The lower beam end caps are fixed by screws, and the nail heads are exposed, affecting the appearance. When the lower beam, which is supposed to block the gap between the round rod and the lower beam, is used on large-size non-pull rainbow blinds, the round rod deforms when pulled down, hitting the inner wall of the lower beam, resulting in high pulling resistance and abnormal noise during the pulling process.

[0004] A rainbow blind lower beam system disclosed in Chinese patent document CN209385033U includes a lower circular tube and a lower beam located at the lower end of the rainbow blind body. The lower beam has end caps at both ends, and the lower circular tube is rotatably mounted on the end caps. Each end cap includes a baffle, an extended base column on the baffle, and a lower circular tube connecting column at the front end of the extended base column, with the lower circular tube rotatably connected to the connecting column. The system also includes a lower circular tube end cap located at both ends of the lower circular tube and rotating with it. The end cap has holes corresponding to the connecting columns, and is rotatably mounted on the connecting columns. This invention avoids the connection point between the lower beam end cap and the lower circular tube end cap, preventing fabric from getting caught when the rainbow blind fabric passes through the lower circular tube, thus improving the functionality of the rainbow blind and increasing its lifespan. However, this rainbow blind lower beam system has a gap between the lower beam rod and the lower beam, which cannot completely block light.

[0005] To address the shortcomings of the existing technology, providing a light-shielding lower beam system is a problem worthy of research. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing rainbow curtain lower beam systems, which have gaps between the lower beam rod and the lower beam, and cannot completely block light. This invention provides a light-blocking lower beam system that achieves stable lifting and gapless operation of the lower beam system.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A light-blocking lower beam system includes a lower round rod mounted on the inner side of the bottom of a pull-out rainbow curtain, and a lower beam mounted on the outer side of the bottom of the pull-out rainbow curtain. A connecting mechanism is provided between the lower round rod and the lower beam. A blocking mechanism is provided on the front side of the lower beam, and a counterweight mechanism is provided on the rear side of the lower beam.

[0009] The connecting mechanism includes round rod heads assembled and connected to both ends of the lower round rod, and left and right end caps assembled and connected to both ends of the lower beam:

[0010] The upper inner sides of the left and right end caps are respectively assembled and connected to the outer sides of the two round rod end caps. By setting the left end cap, right end cap and round rod end cap between the lower round rod and the lower beam, the assembly connection between the lower round rod and the lower beam is completed. The mutual assembly of the lower round rod and the lower beam can enhance the stability of the entire bottom and prevent the curtain from shaking or shifting during use.

[0011] Furthermore, the internal space of the lower beam can accommodate components such as the motor and sensors of the smart curtain, while the rotation of the lower round rod can be linked to control the position of the curtain, supporting automated operation. In outdoor applications, the lower beam can be equipped with counterweights or windproof buckles to enhance wind resistance.

[0012] The shielding mechanism includes a baffle fixedly connected to the front side of the lower beam. When the lower beam is assembled at the bottom of the pull-free rainbow curtain, the inner side of the baffle fits against the outer side of the pull-free rainbow curtain, and the top height of the baffle is higher than the height of the lower round rod axis. By setting the baffle on the front side of the lower beam, the gap between the lower beam and the lower round rod is shielded, avoiding the problem that there is a gap between the lower round rod and the lower beam that cannot completely block the light. The top height of the baffle is limited so that it can completely block the gap while avoiding the baffle being too heavy and affecting the overall lifting and lowering of the pull-free rainbow curtain.

[0013] The baffle is made of high-density ABS plastic, which contains carbon black or light-blocking masterbatch. By using a baffle made of high-density ABS plastic and adding carbon black or light-blocking masterbatch, the baffle achieves a completely opaque effect. ABS has high rigidity and impact resistance, making it suitable as a supporting component for the lower beam. UV-resistant modified ABS can prevent aging and brittleness under long-term light exposure.

[0014] The counterweight mechanism includes several reinforcing ribs fixedly connected to the interior of the rear side of the lower beam. The rearward force exerted by the reinforcing ribs on the lower beam is equal to the forward force exerted by the blocking mechanism on the lower beam. By setting the reinforcing ribs for counterweight on the rear side of the lower beam, the rearward force exerted by the reinforcing ribs on the lower beam cancels out the rearward force exerted by the baffle, so that the front and rear forces of the lower beam are balanced. Thus, the lower beam can maintain a stable state during use and avoid the situation where the lower beam tilts forward due to the action of the front baffle, affecting the light-blocking or aesthetics of the undrawn rainbow curtain.

[0015] Furthermore, adding reinforcing ribs to the lower beam can further improve its strength and compressive load resistance, reduce the probability of deformation when subjected to impact forces, and improve its durability.

[0016] The inner bottom of both the left and right end caps is fixedly connected to an assembly part. The shape of the assembly part is adapted to the end slot shape of the lower beam. The assembly part and the end slot of the lower beam are interference fit. The assembly is completed by the interference fit of the assembly part and the end of the lower beam. The left and right end caps do not need to be locked with screws to the lower beam. The fit dimensions of the assembly position are interference fit. After being installed in the lower beam, it will undergo slight elastic deformation, which increases the tension force after assembly and prevents the end caps from loosening and falling off.

[0017] Positive and beneficial effects:

[0018] 1. This light-blocking lower beam system has a baffle installed on the front side of the lower beam to block the gap between the lower beam and the lower round rod, thus avoiding the problem that the gap between the lower round rod and the lower beam cannot completely block the light.

[0019] 2. This light-blocking lower beam system uses high-density ABS plastic baffles with added carbon black or light-blocking masterbatch to achieve a completely opaque effect. ABS has high rigidity and impact resistance, making it suitable as a supporting component for the lower beam. UV-resistant modified ABS can prevent aging and brittleness under long-term sunlight exposure.

[0020] 3. The light-blocking lower beam system has a reinforcing rib for counterweight on the rear side of the lower beam. This rib exerts a rearward force on the lower beam, which cancels out the rearward force generated by the baffle. This balances the forces on the lower beam, ensuring its stability during use and preventing it from tilting forward due to the force of the front baffle, which could affect the light-blocking performance or aesthetics of the unstretched rainbow curtain. Attached Figure Description

[0021] Figure 1 This is an exploded view of the light-shielding lower beam system of this utility model;

[0022] Figure 2 This is a cross-sectional view of the lower beam of this utility model;

[0023] Figure 3This is a left view of the right end cap of this utility model.

[0024] In the diagram: 1. Left end cap, 2. Round rod end cap, 3. Lower round rod, 4. Right end cap, 4-1. Assembly part, 5. Lower beam, 5-1. Baffle, 5-2. Reinforcing rib. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, a light-blocking lower beam system includes a lower round rod 3 mounted on the inner side of the bottom of a pull-free rainbow curtain, and a lower beam 5 mounted on the outer side of the bottom of the pull-free rainbow curtain. A connecting mechanism is provided between the lower round rod 3 and the lower beam 5. A blocking mechanism is provided on the front side of the lower beam 5, and a counterweight mechanism is provided on the rear side of the lower beam 5.

[0028] like Figure 1 As shown, the connecting mechanism includes round rod end caps 2 assembled and connected to both ends of the lower round rod 3, and left end cap 1 and right end cap 4 assembled and connected to both ends of the lower beam 5;

[0029] The upper inner sides of the left end cap 1 and the right end cap 4 are respectively assembled and connected to the outer sides of the two round rod end caps 2. By setting the left end cap 1, the right end cap 4 and the round rod end cap 2 between the lower round rod 3 and the lower beam 5, the assembly connection between the lower round rod 3 and the lower beam 5 is completed. The mutual assembly of the lower round rod 3 and the lower beam 5 can enhance the stability of the entire bottom and prevent the curtain from shaking or shifting during use.

[0030] Furthermore, the internal space of the lower beam can accommodate components such as the motor and sensors of the smart curtain, while the rotation of the lower round rod can be linked to control the position of the curtain, supporting automated operation. In outdoor applications, the lower beam can be equipped with counterweights or windproof buckles to enhance wind resistance.

[0031] like Figures 1 to 2As shown, the blocking mechanism includes a baffle 5-1 fixedly connected to the front side of the lower beam 5. When the lower beam 5 is assembled at the bottom of the pull-free rainbow curtain, the inner side of the baffle 5-1 is in contact with the outer side of the pull-free rainbow curtain, and the top height of the baffle 5-1 is higher than the height of the axis of the lower round rod 3. By setting the baffle 5-1 on the front side of the lower beam 5, the gap between the lower beam 5 and the lower round rod 3 is blocked, avoiding the problem that there is a gap between the lower round rod and the lower beam that cannot completely block the light. The top height of the baffle 5-1 is limited so that it can completely block the gap while avoiding the baffle 5-1 being too heavy and affecting the overall lifting and lowering of the pull-free rainbow curtain.

[0032] like Figures 1 to 2 As shown, the baffle 5-1 is made of high-density ABS plastic. Carbon black or light-blocking masterbatch is added to the high-density ABS plastic. By using high-density ABS plastic material for the baffle 5-1 and adding carbon black or light-blocking masterbatch, the baffle achieves a completely opaque effect. ABS has high rigidity and impact resistance, making it suitable as a support component for the lower beam. UV-resistant modified ABS can prevent aging and brittleness under long-term light exposure.

[0033] Example 2

[0034] like Figures 1 to 2 As shown, the counterweight mechanism includes several reinforcing ribs 5-2 fixedly connected to the interior of the rear side of the lower beam 5. The rearward force exerted by the reinforcing ribs 5-2 on the lower beam 5 is equal to the forward force exerted by the blocking mechanism on the lower beam 5. By setting the reinforcing ribs 5-2 for counterweight on the rear side of the lower beam 5, they exert a rearward force on the lower beam 5, which cancels out the rearward force exerted by the baffle 5-1, so that the forces on the lower beam 5 are balanced. Thus, the lower beam can maintain a stable state during use, and avoid the situation where the lower beam 5 tilts forward due to the action of the front baffle 5-1, affecting the light-blocking or aesthetics of the undrawn rainbow curtain.

[0035] Furthermore, adding reinforcing ribs 5-2 inside the lower beam 5 can further improve the strength and compressive load resistance of the lower beam 5, reduce the probability of deformation of the lower beam 5 when subjected to impact force, and improve its durability.

[0036] Example 3

[0037] like Figures 1 to 3 As shown, the inner bottom of the left end cap 1 and the right end cap 4 are both fixedly connected to the assembly part 4-1. The shape of the assembly part 4-1 is adapted to the end slot shape of the lower beam 5. The assembly part 4-1 and the slot at the end of the lower beam 5 are interference fit. The assembly is completed by the interference fit between the assembly part 4-1 and the end of the lower beam 5. There is no need for screws to lock the left and right end caps to the lower beam. The fit dimensions of the assembly position are interference fit. After being installed in the lower beam, it will undergo slight elastic deformation, which increases the tension force after assembly and prevents the end caps from loosening and falling off.

[0038] The working principle of this utility model is as follows:

[0039] S1. A light-shielding baffle is provided on the front of the lower beam to block the gap between the lower beam and the lower round rod.

[0040] S2. The back panel is free of baffles, which fully releases space and allows the round rod to rotate freely during the pulling process of the pull-down rainbow curtain without interference, thus reducing the pulling resistance.

[0041] S3. Reinforcing ribs are provided inside to ensure that the weight of the lower beam is consistent on both sides with the center line as the boundary, thus achieving balance.

[0042] S4. The left and right end caps and the lower beam do not need to be locked with screws. The mating dimensions at the assembly position are interference fit. After the lower beam is installed, there will be slight elastic deformation, which increases the tension force after assembly and prevents the end caps from loosening and falling off.

[0043] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A light-shielding bottom rail system comprising a bottom round rod (3) assembled in the inner side of the bottom of a pull-free color rainbow curtain, and a bottom rail (5) assembled in the outer side of the bottom of the pull-free color rainbow curtain, characterized in that: The lower circular rod (3) and the lower beam (5) are provided with a connecting mechanism, the front side of the lower beam (5) is provided with a shielding mechanism, and the rear side of the lower beam (5) is provided with a counterweight mechanism.

2. A system for shading an undercarriage according to claim 1, wherein: The connecting mechanism comprises circular rod end caps (2) assembled and connected to both ends of the lower circular rod (3), and left end cap (1) and right end cap (4) assembled and connected to both ends of the lower beam (5). The upper end of the left end cap (1) and the right end cap (4) is respectively assembled and connected to the outer side of the two circular rod end caps (2).

3. A system according to claim 2, wherein: The shielding mechanism comprises a baffle (5-1) fixedly connected to the front side of the lower beam (5), when the lower beam (5) is assembled at the bottom of the pull-free rainbow curtain, the inner side of the baffle (5-1) is fitted with the outer side of the pull-free rainbow curtain, and the top of the baffle (5-1) is higher than the height of the axis of the lower circular rod (3).

4. A system according to claim 3, wherein: The material of the baffle (5-1) is high-density ABS plastic, and the high-density ABS plastic is added with carbon black or shading master batch.

5. A system according to claim 1, wherein: The counterweight mechanism comprises a plurality of reinforcing ribs (5-2) fixedly connected to the inner side of the rear side of the lower beam (5), the reinforcing ribs (5-2) generate a rearward force on the lower beam (5) equal to the forward force generated by the shielding mechanism on the lower beam (5).

6. A system according to claim 2, wherein: The inner side of the left end cap (1) and the right end cap (4) is fixedly connected with an assembly part (4-1), the shape of the assembly part (4-1) is matched with the slotted shape of the end part of the lower beam (5), and the assembly part (4-1) is in interference fit with the slot of the end part of the lower beam (5).

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