Adjustable non-uniform sunshade curtain

Abstract

The utility model discloses an adjustable non-uniform sunshade curtain which comprises a wide curtain piece, a narrow curtain piece, a wide curtain movement supporting rod, a narrow curtain movement supporting rod and a horizontal movement rod. The wide curtain pieces and the narrow curtain pieces are consistent in height and not consistent in width, and the wide curtain pieces and the narrow curtain pieces are tightly attached together front and back through connecting pieces to form the stacked sunshade curtain. Uniform light holes are formed in the wide curtain sheets and the narrow curtain sheets; the wide curtain movement supporting rod is connected with the top of the wide curtain sheet; the narrow curtain movement supporting rod is connected with the top of the narrow curtain sheet; two ends of the horizontal moving rod are respectively connected with the wide curtain moving support rod and the narrow curtain moving support rod; the angles between the horizontal movement rod and the wide curtain movement supporting rod and the angle between the horizontal movement rod and the narrow curtain movement supporting rod are adjusted, so that the wide curtain pieces and the narrow curtain pieces are adjusted to generate vertical and horizontal relative displacement, and non-uniform light transmission is achieved. According to the utility model, non-uniform sunshade can be carried out so as to realize the adjustment of the light environment comfort degree of a room.

Description

Technical Field

[0001] This utility model relates to a curtain, specifically an adjustable uneven sunshade curtain. Background Technology

[0002] Interior shading typically employs curtains and venetian blinds, offering either uniform or segmented shading (e.g., curtains not fully drawn, only lowered to a certain height above the light source, generally providing shading from the top and allowing light in from the bottom). However, these interior shading methods cannot meet the following application scenarios (uneven shading):

[0003] In a dimly lit indoor working environment, it is necessary to increase the intensity of natural lighting on a work surface at a certain height.

[0004] In rooms with a large depth, full-height windows are used. As the depth increases, the lighting effect gradually decreases. Therefore, it is necessary to improve the natural lighting of the room more evenly.

[0005] The room has horizontal strip windows on the exterior wall, which need to improve the natural lighting in a certain area while providing shade, and the location of this area is uncertain within the room's width.

[0006] Currently, there is an adjustable curtain on the market. This curtain uses two layers of material with different transparency arranged horizontally in strips (with consistent width). By adjusting the vertical position of the two layers, the light transmittance of the curtain is adjusted. This provides uniform shading, and its adjustment effect is similar to that of Venetian blinds, where the amount of light is adjusted by changing the angle of the slats. However, the aforementioned adjustable curtain cannot meet the specific application scenarios described above.

[0007] Therefore, we urgently need a new type of sunshade curtain to meet the above application scenarios. Utility Model Content

[0008] The main purpose of this invention is to provide an adjustable uneven shading curtain that can provide uneven shading to adjust the comfort of the room's lighting environment.

[0009] The technical solution adopted in this utility model is:

[0010] An adjustable uneven sunshade curtain includes a wide curtain slat, a narrow curtain slat, a wide curtain movement strut, a narrow curtain movement strut, and a horizontal movement rod;

[0011] The wide and narrow slats are of the same height but different widths, and are tightly attached together front and back by connectors to form a superimposed sunshade curtain; both the wide and narrow slats are provided with uniform light-transmitting holes; after being superimposed, the wide and narrow slats become adjustable non-uniform perforations;

[0012] The wide curtain movement support rod is connected to the top of the wide curtain slat; the narrow curtain movement support rod is connected to the top of the narrow curtain slat; the wide curtain movement support rod and the narrow curtain movement support rod can move up and down relative to each other;

[0013] The two ends of the horizontal movement rod are respectively connected to the wide curtain movement support rod and the narrow curtain movement support rod;

[0014] Adjusting the angle between the horizontal movement rod and the wide curtain movement support rod and the narrow curtain movement support rod allows for vertical and horizontal relative displacement of the wide and narrow curtain slats, achieving uneven light transmission.

[0015] According to the above scheme, a wide curtain rod is provided on the non-contact surface of the wide curtain slat, and a narrow curtain rod is provided on the non-contact surface of the narrow curtain slat; both the wide and narrow curtain rods are located in the non-perforated area. Both the wide and narrow curtain rods are horizontal, rigid rods, and do not affect the tight fit between the wide and narrow curtain slats.

[0016] According to the above scheme, the wide curtain rod and the narrow curtain rod are provided with traction ropes on both sides, and the curtain slats are rolled up by retracting the traction ropes.

[0017] According to the above scheme, the wide curtain rods and narrow curtain rods are staggered, that is, the rods at the same height for wide and narrow curtain slats are offset by a small distance to ensure that the wide and narrow curtain rods do not affect the sliding of the hoop rope. For example, if the hoop rope moves downwards, the narrow curtain rod for the narrow curtain slat should be slightly higher than the wide curtain rod for the wide curtain slat.

[0018] According to the above scheme, the connecting component is a hoop rope to ensure that the wide and narrow curtain slats fit together tightly.

[0019] According to the above scheme, the hoop is set at each wide curtain rod of the wide curtain slat, and then the hoop passes through the narrow curtain slat, tightly pressing the wide curtain slat and the narrow curtain slat together.

[0020] According to the above scheme, in the initial position, the distance Φ between the topmost light-transmitting hole of the wide curtain and the topmost light-transmitting hole of the narrow curtain is between 20mm and 100mm; when the light-transmitting hole is a circular hole, Φ is the diameter of the circular hole; when the light-transmitting hole is a square hole, Φ is the side length of the square.

[0021] The spacing B1 between adjacent rows of light-transmitting holes on a wide slat is a crucial passive adaptation parameter. B1 = h1 / N, where h1 represents the vertical distance from the center of the top row of light-transmitting holes to the center of the bottom row of light-transmitting holes on the wide slat, which is a key parameter that needs to be actively determined; N is the number of rows of holes; N is the integer part of the calculated value (H-2Φ) / B2, where H is the height of the curtain, which is also the height of the narrow slat and the wide slat;

[0022] The spacing B2 between adjacent rows of light-transmitting holes on the narrow slat is a fixed parameter, B2=2Φ.

[0023] According to the above scheme, the relationship between the width W2 of the narrow slat and the width W1 of the wide slat is: W2 = W1 - Φ, where Φ is the distance between the uppermost light-transmitting hole of the wide slat and the uppermost light-transmitting hole of the narrow slat when the initial position is met.

[0024] The spacing D between the light-transmitting holes of wide and narrow slats is a fixed parameter, D=aΦ, where a is not less than 2, and preferably a=2.2.

[0025] According to the above scheme, C is a non-critical passive adaptation parameter, which needs to be derived from the opening arrangement of the narrow curtain:

[0026] The distance from the center line of the first column of light-transmitting holes of the wide slat to the right edge of the wide slat, and the distance from the center line of the first column of light-transmitting holes of the narrow slat to the right edge of the narrow slat, C1=(W2-Φ-D*P) / 2, where P is the number of columns of openings of the wide slat and the narrow slat, which is the integer part of the calculated value (W2-Φ) / D.

[0027] The distance from the center line of the last row of light-transmitting holes of the wide slat to the bottom edge of the wide slat, and the distance from the center line of the last row of light-transmitting holes of the narrow slat to the bottom edge of the narrow slat, is C2=(H-2Φ-B2*N) / 2.

[0028] According to the above scheme, the vertical distance h2 from the center of the top row of light-transmitting holes to the center of the bottom row of light-transmitting holes in the narrow curtain is a non-critical passive adaptation parameter, h2=B2*N;

[0029] The vertical distance from the center of the top row of light-transmitting holes to the center of the bottom row of light-transmitting holes in the wide curtain slat is h1 = h2 + Φ;

[0030] The distance between adjacent rows of light-transmitting holes on a wide curtain slat is B1 = h1 / N.

[0031] When designing, first determine the Φ value, then determine the size of the curtains, H, W1, W2; then determine other parameters.

[0032] The larger the Φ value, the more pronounced the texture of the curtains, but the greater the distance required to adjust the curtain's effect. Too large a value will result in an oversized mechanical movement mechanism; too small a value will lead to an overly sensitive adjustment, making manual operation difficult. H and W1 should meet the requirements for covering the area of ​​the exterior wall's light-transmitting opening. The adjustment distance is fixed at the Φ value, the span of light transmission variation is the h1 value, and regardless of how much H and h1 are increased, the adjustment distance always remains at the Φ value determined in the initial design.

[0033] According to the above scheme, the arrangement of light-transmitting holes on the wide and narrow curtain slats is rotated by 90°; the wide curtain movement support rod and the narrow curtain movement support rod can move left and right;

[0034] Pulling the wide curtain slats causes the wide and narrow curtain movement rods to move horizontally left and right. Adjusting the angle between the horizontal movement rod and the wide and narrow curtain movement rods adjusts the relative horizontal displacement of the wide and narrow curtain slats, thus achieving uneven light transmission.

[0035] According to the above scheme, the adjustable uneven sunshade curtain also includes two sets of pull cords and two sliding tracks;

[0036] One end of one set of pull ropes is connected to the wide curtain movement support rod, and the other end passes through a hook in one of the sliding tracks;

[0037] One end of another set of pull ropes is connected to the narrow curtain movement support rod, and the other end passes through a hook on another sliding track;

[0038] Pulling a set of ropes causes the wide curtain movement support rod and the narrow curtain movement support rod to shift vertically, thereby causing the wide curtain slats and narrow curtain slats to shift vertically relative to each other, achieving uneven light transmission.

[0039] Wide and narrow slats are folding blinds instead of roller blinds.

[0040] The beneficial effects of the present invention are:

[0041] By moving the wide curtain support rod, the narrow curtain support rod, and the horizontal support rod, the horizontal or vertical position of the wide and narrow curtain slats can be adjusted, thereby adjusting the uneven perforation position of the curtains to achieve uneven shading and meet the adjustment of the room's light environment comfort.

[0042] By regularly arranging geometric patterns on the curtain fabric and overlapping them, adjustable uneven perforations can be formed.

[0043] By making minute distance adjustments, the area with the best light transmission in uneven light transmission can be adjusted over a large range.

[0044] It offers multiple shading modes, and various shading effects can be achieved by manually adjusting the relative distance between the curtain slats;

[0045] The top movable support rod is set at the top of each curtain slat and can move relative to each other up, down, left, and right. This invention is based on this architectural design and construction method. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1This is a schematic diagram of the adjustable uneven sunshade curtain before vertical movement in Example 1;

[0048] Figure 2 This is a schematic diagram of the structure of the adjustable uneven sunshade curtain after vertical movement in Example 1;

[0049] Figure 3 These are structural diagrams of wide and narrow curtain slats;

[0050] Figure 4 This is a diagram showing the vertical movement adjustment and effect of the adjustable uneven sunshade curtain in Example 1.

[0051] Figure 5 This is a schematic diagram of the structure of the wide curtain movement support, narrow curtain movement support, and horizontal movement rod before the adjustable uneven sunshade curtain moves horizontally in Example 2;

[0052] Figure 6 This is a schematic diagram of the structure of the wide curtain movement support, narrow curtain movement support, and horizontal movement rod after the adjustable uneven sunshade curtain is moved horizontally in Example 2;

[0053] Figure 7 This is a diagram showing the horizontal movement adjustment and effect of the adjustable uneven sunshade curtain in Example 2;

[0054] In the diagram: 1. Wide curtain slat, 2. Narrow curtain slat, 3. Wide curtain movement support rod, 4. Narrow curtain movement support rod, 5. Horizontal movement rod, 6. Wide curtain thin rod, 7. Narrow curtain thin rod, 8. Hoop cord, 9. Light-transmitting hole, 10. Traction rope, 11. Sliding track, 12. Pull cord. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0056] Example 1

[0057] See Figures 1-4 An adjustable uneven sunshade curtain includes a wide curtain slat 1, a narrow curtain slat 2, a wide curtain movement support rod 3, a narrow curtain movement support rod 4, a horizontal movement rod 5, two sets of pull cords 12, and two sliding tracks 10.

[0058] Wide curtain slats 1 and narrow curtain slats 2 are of the same height but different widths, and are tightly attached together front and back by hoops 8 to form a superimposed sunshade curtain. Both wide curtain slats 1 and narrow curtain slats 2 have uniformly spaced light-transmitting holes 9, which, after being superimposed, become adjustable, unevenly spaced perforations. A wide curtain movement support rod 3 is connected to the top of the wide curtain slat 1; a narrow curtain movement support rod 4 is connected to the top of the narrow curtain slat 2. The two ends of a horizontal movement rod 5 are movably connected to the wide curtain movement support rod 3 and the narrow curtain movement support rod 4, respectively. One end of one set of pull ropes 12 is connected to the wide curtain movement support rod 3, and the other end passes through a hook on one of the sliding tracks 11; one end of another set of pull ropes 12 is connected to the narrow curtain movement support rod 4, and the other end passes through a hook on another sliding track 11. Pulling one set of pull ropes 12 causes the wide curtain movement support rods 3 and the narrow curtain movement support rod 4 to shift vertically, thereby causing the wide curtain slats 1 and narrow curtain slats 2 to shift vertically relative to each other, achieving uneven light transmission. In this embodiment, the curtain slats are folding curtains instead of roller blinds. To avoid affecting the stacking of the wide curtain slats 1 and narrow curtain slats 2, a wide curtain rod 6 (rigid) can be provided on the non-contact surface of the wide curtain slats 1, and a narrow curtain rod 7 (rigid) can be provided on the non-contact surface of the narrow curtain slats 2; and both the wide curtain rod 6 and the narrow curtain rod 7 are located in the non-perforated area. The wide curtain rod 6 and the narrow curtain rod 7 are staggered, that is, the rods at the same height of the wide curtain slats 1 and the narrow curtain slats 2 are staggered by a small distance to ensure that the wide curtain rod 6 and the narrow curtain rod 7 do not affect the sliding of the hoop rope 8; the hoop rope 8 is provided at each wide curtain rod 6 of the wide curtain slats 1, and the hoop rope 8 passes through the narrow curtain slats 2, tightly pressing the wide curtain slats 1 and the narrow curtain slats 2 together.

[0059] In this embodiment, in order to facilitate the retraction of the wide curtain slat 1 and the narrow curtain slat 2, traction ropes 10 can be provided on both sides of the wide curtain rod 6 and the narrow curtain rod 7. The wide curtain slat 1 and the narrow curtain slat 2 can be rolled up by retracting the traction ropes 10.

[0060] In this embodiment, the parameters are determined as follows:

[0061] In the initial position, the distance Φ between the uppermost light-transmitting hole 9 of the wide curtain slat 1 and the uppermost light-transmitting hole 9 of the narrow curtain slat 2 is between 20mm and 100mm; in this embodiment, the light-transmitting hole 9 is a circular hole, and Φ is the diameter of the circular hole.

[0062] The spacing B1 between adjacent rows of light-transmitting holes 9 on the wide slat 1 is a key passive adaptation parameter. B1 = h1 / N, where h1 represents the vertical distance from the center of the top row of light-transmitting holes 9 to the center of the bottom row of light-transmitting holes 9 on the wide slat 1; N is the number of rows of holes; N is the integer part of the calculated value (H-2Φ) / B2, where H is the height of the curtain, which is also the height of the narrow slat 2 and the wide slat 1.

[0063] The spacing B2 between adjacent rows of light-transmitting holes 9 on the narrow slat 2 is a fixed parameter, B2=2Φ.

[0064] The relationship between the width W2 of the narrow slat 2 and the width W1 of the wide slat 1 is: W2 = W1 - Φ, where Φ is the distance between the uppermost light-transmitting hole 9 of the wide slat 1 and the uppermost light-transmitting hole 9 of the narrow slat 2 in the initial position.

[0065] The spacing D between the light-transmitting holes 9 of the wide slat 1 and the narrow slat 2 is a fixed parameter, D=2.2Φ.

[0066] C is a non-critical passive adaptation parameter, which needs to be determined from the opening arrangement of the narrow curtain:

[0067] The distance from the center line of the first column of light-transmitting holes 9 of the wide curtain slat 1 to the right edge of the wide curtain slat 1, and the distance from the center line of the first column of light-transmitting holes 9 of the narrow curtain slat 2 to the right edge of the narrow curtain slat 2, is C1=(W2-Φ-D*P) / 2, where P is the number of columns of openings of the wide curtain slat 1 and the narrow curtain slat 2, which is the integer part of the calculated value (W2-Φ) / D.

[0068] The distance from the center line of the last row of light-transmitting holes 9 of the wide slat 1 to the bottom edge of the wide slat 1, and the distance from the center line of the last row of light-transmitting holes 9 of the narrow slat 2 to the bottom edge of the narrow slat 2, is C2=(H-2Φ-B2*N) / 2.

[0069] The vertical distance h2 from the center of the top row of light-transmitting holes 9 to the center of the bottom row of light-transmitting holes 9 in the narrow curtain slat 2 is a non-critical passive adaptation parameter, h2=B2*N.

[0070] The vertical distance h1 from the center of the top row of light-transmitting holes 9 to the center of the bottom row of light-transmitting holes 9 in the wide curtain slat 1 is h2 + Φ;

[0071] The distance between adjacent light-transmitting holes 9 on the wide curtain slat 1 is B1 = h1 / N.

[0072] See Figure 4 In the initial state, the movement is only vertical (wide and narrow curtains only undergo relative vertical displacement). Taking N=14 rows as an example, state 1 is the initial state with the bottom edges aligned; state 14 is the state with the maximum vertical displacement, where the centers of the top row of light-transmitting holes 9 of wide curtain slat 1 and narrow curtain slat 2 are aligned; states 2 to 13 are states where the centers of the light-transmitting holes 9 of each row are aligned from bottom to top. The maximum vertical displacement distance is equal to Φ. Overall effect: In the initial state, the area with the largest penetration area (best light transmission effect) is located at the bottom, gradually becoming the area with the smallest light transmission area towards the top. As the 14 settings are adjusted (the vertical adjustment distance of each setting is very small, equal to Φ / N), the area with the best light transmission effect gradually moves upward until the area with the best light transmission effect is adjusted to the top.

[0073] By making minute distance adjustments, the area with the best light transmission in uneven light transmission can be adjusted over a large range. The adjustment distance is fixed at a value Φ, the range of light transmission variation is a value h1, and no matter how much H and h1 are increased, the adjustment distance always remains at the Φ value determined in the initial design.

[0074] Example 2

[0075] See Figures 5-7 Unlike Example 1, the light-transmitting holes on the wide curtain slat 1 and the narrow curtain slat 2 are arranged and rotated by 90°; the wide curtain movement support rod 3 and the narrow curtain movement support rod 4 can move left and right; when the wide curtain slat 1 is pulled, the pull rope 12 connected to the wide curtain movement support rod 3 drives the hook of the sliding track 11 to move, thereby causing the wide curtain movement support rod 3 and the narrow curtain movement support rod 4 to move horizontally left and right, so that the wide curtain slat 1 and the narrow curtain slat 2 undergo horizontal relative displacement, achieving uneven light transmission.

[0076] Initial state:

[0077] In the initial state, the narrow slat 2 (yellow) is aligned with the top, bottom, and left sides of the wide slat 1 (blue). The uneven perforation effect after the curtains are overlapped in the initial state is as follows: the top perforation area is very small, almost completely obscuring the view; the bottom perforation area is the largest, reaching 100% of the Φ value.

[0078] Horizontal movement adjustment and its effects:

[0079] In the initial state, the curtains move only horizontally (wide slat 1 and narrow slat 2 only undergo relative horizontal displacement) until their right sides are aligned. The maximum horizontal displacement is equal to Φ. At this point, all penetrating parts disappear, leaving the curtains completely closed.

[0080] This invention offers multiple shading modes, allowing for various shading effects to be achieved by manually adjusting the relative distance between the wide curtain slats 1 and the narrow curtain slats 2, and by pulling the cord to different lengths. The final adjustment can be tailored to suit different outdoor and indoor environmental conditions, as well as individual needs, through manual adjustment.

[0081] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0082] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An adjustable uneven sunshade curtain, characterized in that: Includes wide curtain slats, narrow curtain slats, wide curtain movement struts, narrow curtain movement struts, and horizontal movement struts; The wide and narrow slats are of the same height but different widths, and are tightly attached together front and back by connectors to form a superimposed sunshade curtain; both the wide and narrow slats are provided with uniform light-transmitting holes. The wide curtain movement support rod is connected to the top of the wide curtain slats; The narrow curtain movement support rod is connected to the top of the narrow curtain slats; The two ends of the horizontal movement rod are respectively connected to the wide curtain movement support rod and the narrow curtain movement support rod; Adjusting the angle between the horizontal movement rod and the wide curtain movement support rod and the narrow curtain movement support rod allows for vertical and horizontal relative displacement of the wide and narrow curtain slats, achieving uneven light transmission.

2. The adjustable uneven sunshade curtain according to claim 1, characterized in that: The wide curtain slats are provided with wide curtain rods on their non-contact surfaces, and the narrow curtain slats are provided with narrow curtain rods on their non-contact surfaces; both the wide and narrow curtain rods are located in the non-perforated area.

3. The adjustable uneven sunshade curtain according to claim 2, characterized in that: The wide curtain rod and the narrow curtain rod are equipped with traction ropes on both sides, and the curtain slats are rolled up by retracting the traction ropes.

4. The adjustable uneven sunshade curtain according to claim 2, characterized in that: The wide curtain rods and narrow curtain rods are staggered.

5. The adjustable uneven sunshade curtain according to claim 1, characterized in that: The connector is a hoop.

6. The adjustable uneven sunshade curtain according to claim 1, characterized in that: In the initial position, the distance Φ between the topmost light-transmitting hole of the wide slat and the topmost light-transmitting hole of the narrow slat is between 20mm and 100mm; when the light-transmitting hole is circular, Φ is the diameter of the circular hole; when the light-transmitting hole is square, Φ is the side length of the square. The spacing between adjacent rows of light-transmitting holes on the wide curtain slat is B1 = h1 / N, where h1 represents the vertical distance from the center of the light-transmitting hole in the top row to the center of the light-transmitting hole in the bottom row of the wide curtain slat, and N is the number of rows of holes; N is the integer part of the calculated value (H-2Φ) / B2, where H is the height of the curtain; The spacing between adjacent rows of light-transmitting holes on the narrow curtain slat is B2=2Φ; The distance from the center line of the first column of light-transmitting holes of the wide slat to the right edge of the wide slat, and the distance from the center line of the first column of light-transmitting holes of the narrow slat to the right edge of the narrow slat, C1=(W2-Φ-D*P) / 2, where P is the number of columns of openings of the wide slat and the narrow slat, which is the integer part of the calculated value (W2-Φ) / D. The distance from the center line of the last row of light-transmitting holes of the wide slat to the bottom edge of the wide slat, and the distance from the center line of the last row of light-transmitting holes of the narrow slat to the bottom edge of the narrow slat, C2=(H-2Φ-B2*N) / 2.

7. The adjustable uneven sunshade curtain according to claim 1, characterized in that: The relationship between the width W2 of the narrow slat and the width W1 of the wide slat is: W2 = W1 - Φ, where Φ is the distance between the uppermost light-transmitting hole of the wide slat and the uppermost light-transmitting hole of the narrow slat in the initial position. The spacing between the light-transmitting holes of wide and narrow slats is D=aΦ, where a is not less than 2.

8. The adjustable uneven sunshade curtain according to claim 1, characterized in that: The vertical distance h2 from the center of the top row of light-transmitting holes to the center of the bottom row of light-transmitting holes in the narrow curtain slat is H2 = B2 * N; The vertical distance from the center of the top row of light-transmitting holes to the center of the bottom row of light-transmitting holes in the wide curtain slat is h1 = h2 + Φ; The distance between adjacent rows of light-transmitting holes on a wide curtain slat is B1 = h1 / N.

9. The adjustable uneven sunshade curtain according to claim 6, characterized in that: The arrangement of light-transmitting holes on the wide and narrow slats is rotated 90°.

10. The adjustable non-uniform sunshade curtain according to claim 1, characterized in that: The adjustable uneven sunshade also includes two sets of pull cords and two sliding tracks; One end of one set of pull ropes is connected to the wide curtain movement support rod, and the other end passes through a hook in one of the sliding tracks; One end of another set of pull ropes is connected to the narrow curtain movement support rod, and the other end passes through the hook of another sliding track.

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