A control structure for a cross-shaped canopy opening procedure

Abstract

The application discloses a control structure of a cross-shaped umbrella cloth opening procedure. The structure is used for closing the bottom edge of the umbrella cloth through a closing cloth structure, so as to constrain the bottom edge of the umbrella cloth and the umbrella rope. In the process of inflating the umbrella cloth, the closing cloth slides along the umbrella rope, which can effectively prevent the bottom edge of the umbrella cloth from being disordered in the opening process, so as to cause the faults such as umbrella turning and damage, and meanwhile, the inflating speed can be slowed down, and the opening overload can be reduced. The closing cloth is composed of eight large trapezoidal cloths, four small trapezoidal cloths and a mesh cloth. Each large trapezoidal cloth is provided with three eye circles, each small trapezoidal cloth is provided with one eye circle, and a total of 28 eye circles are provided for 28 umbrella ropes. The central yarn of the closing cloth is a circular mesh cloth, which ensures that the air inlet of the bottom edge of the umbrella cloth is not blocked, and the umbrella cloth can be inflated smoothly. Meanwhile, in order to reduce the opening loss height and increase the bottom edge tension, a blowing bag is arranged on the bottom edge of the umbrella cloth.

Description

Technical Field

[0001] This invention relates to the field of parachute system technology, and in particular to a control structure for a cross-shaped parachute canopy opening procedure. Background Technology

[0002] Among the current parachute systems in China, the cross-shaped parachute has advantages such as good stability, high material utilization, and simple manufacturing process. It is widely used in drag parachutes, bomb parachutes, and cargo drop parachutes. Currently, no human parachutes in China use the cross-shaped parachute.

[0003] A cross-shaped umbrella consists of two identical rectangular fabric panels that intersect at right angles to each other, forming a flat surface with four identical side panels. The umbrella cords are attached to the outer edges of the four side panels; some umbrellas also use tie cords to connect adjacent side panels at their corners.

[0004] The distance from the top to the bottom edge of the cross-shaped umbrella is not equal, and the opening procedure is not controlled. During the straightening and inflation process, the parachute lines and canopy are subjected to uneven force. During the opening process, the various parts of the canopy are severely misaligned, which can easily cause the canopy to hit and burn the parachute lines and the canopy to hit each other, and can easily cause local damage. Summary of the Invention

[0005] The purpose of this invention is to provide a control structure for the opening procedure of a cross-shaped umbrella canopy, which solves the problem of damage caused by the canopy and parachute lines, and the canopy and parachute lines being struck and burned during the opening of a cross-shaped umbrella.

[0006] The technical solution to achieve the purpose of this invention is: a control structure for the opening procedure of a cross-shaped umbrella canopy, including a center yarn of the closing fabric, a trapezoidal fabric one, a trapezoidal fabric two, a perimeter reinforcing band, a trapezoidal fabric three right, a trapezoidal fabric three left, a cross reinforcing band, and a lifting loop;

[0007] The center yarn of the closing fabric is a large-mesh mesh. Two cross reinforcing strips are sewn through the center point of the center yarn, dividing the center yarn into four evenly distributed pieces. Trapezoidal fabric two is sewn at the junction of the two cross reinforcing strips and the edge of the center yarn. Two trapezoidal fabric pieces are evenly distributed between every two trapezoidal fabric two pieces, of which six are trapezoidal fabric one pieces, one is trapezoidal fabric three right, and one is trapezoidal fabric three left. Trapezoidal fabric three right and trapezoidal fabric three left are symmetrically distributed on the left and right sides of any trapezoidal fabric two piece.

[0008] Furthermore, a reinforcing band is sewn around the seam of trapezoidal fabric 1, trapezoidal fabric 2, trapezoidal fabric 3 (right), trapezoidal fabric 3 (left) and the center yarn of the closing fabric for reinforcement.

[0009] Furthermore, each trapezoidal fabric piece 2 has one small eyelet, and each trapezoidal fabric piece 1 has three small eyelets; the right side and upper left side of trapezoidal fabric piece 3 each have four eyelets, including three small eyelets and one large eyelet, with the large eyelet located between two small eyelets; the entire closing fabric has a total of 28 small eyelets and 2 large eyelets, each small eyelet can pass through a paracord, and the large eyelets on the left and right sides can be used for the left and right control ropes to pass through.

[0010] Furthermore, a lifting loop is sewn at the center of the two cross-shaped reinforcing straps to pull up the closure when folded. A blower is added to the bottom edge of the umbrella canopy.

[0011] Compared with the prior art, the present invention has the following significant advantages: (1) By using the closing cloth, when the umbrella canopy is inflated, the closing cloth slides down from the top of the paracord to constrain the bottom edge of the umbrella canopy and the paracord, control the opening procedure of the cross-shaped umbrella, reduce the chance of mutual burn between the umbrella canopy and the paracord, and effectively prevent the bottom edge of the umbrella canopy from becoming disordered during the opening process, which could lead to umbrella flipping, breakage and other malfunctions; (2) By using the closing cloth, the umbrella can slide down slowly from the top of the paracord, which can slow down the inflation speed and reduce the overload impact when the umbrella is opened. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the sealing fabric of the present invention. Detailed Implementation

[0013] This invention relates to a structure for controlling the opening procedure of a cross-shaped umbrella. This structure primarily controls the opening procedure through a sealing fabric and a blower bag. The sealing fabric structure seals the bottom edge of the umbrella canopy, constraining the bottom edge and the parachute lines. During inflation, the sealing fabric slides down the parachute lines, effectively preventing the bottom edge of the canopy from becoming disordered during opening, thus preventing malfunctions such as umbrella tipping or breakage. It also slows down the inflation speed, reducing opening overload. The sealing fabric consists of 8 large trapezoidal fabric pieces, 4 small trapezoidal fabric pieces, and mesh. Each large trapezoidal fabric piece has 3 eyelets, and each small trapezoidal fabric piece has 1 eyelet, for a total of 28 eyelets for 28 parachute lines to pass through. The central mesh of the sealing fabric is a circular mesh with a diameter of 1.67m, ensuring that the air inlet at the bottom edge of the canopy is not blocked and allowing for smooth inflation. Simultaneously, to reduce height loss during opening and increase bottom edge tension, a blower bag is added to the bottom edge of the canopy.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] The structure of the gathered fabric is as follows Figure 1 As shown: It mainly includes the center yarn of the closing fabric 1, trapezoidal fabric one 2, trapezoidal fabric two 3, perimeter reinforcing band 4, trapezoidal fabric three right 5, trapezoidal fabric three left 6, cross reinforcing band 7, and lifting loop 8.

[0016] The center gauze 1 of the closing fabric is made of large-mesh mesh, allowing for rapid inflation. Two cross-shaped reinforcing strips 7 are sewn through the center point of the center gauze 1, dividing it into four even sections. Trapezoidal fabric 2 3 is sewn at the junction of the two cross-shaped reinforcing strips 7 and the edge of the center gauze 1. Two trapezoidal fabric 1 2 are evenly distributed between every two trapezoidal fabric 2 3. Each trapezoidal fabric 2 3 has one small eyelet, and each trapezoidal fabric 1 2 has three small eyelets. Trapezoidal fabric 3 right 5 and trapezoidal fabric 3 left 6 have four eyelets, including three small eyelets and one large eyelet, with the large eyelet located between two small eyelets. Trapezoidal fabric 3 right 5 and trapezoidal fabric 3 left 6 are symmetrically distributed on the left and right sides of any one of the trapezoidal fabric 2 3. The entire closing fabric has a total of 28 small eyelets and 2 large eyelets. Each small eyelet can pass through one paracord, and the large eyelets on the left and right sides can be used for the left and right control ropes. Sew a reinforcing band 4 around the seam of trapezoidal fabric 1 (2), trapezoidal fabric 2 (3), trapezoidal fabric 3 (right) (5), trapezoidal fabric 3 (left) and the center yarn of the closing fabric (1) for reinforcement. Sew a lifting loop 8 at the center of the two cross reinforcing bands 7 to lift the closing fabric when folding.

[0017] The working process of this invention is as follows:

[0018] The closing fabric mainly consists of one central gauze piece (1), six trapezoidal fabric pieces (2), four trapezoidal fabric pieces (3), one right trapezoidal fabric piece (5), and one left trapezoidal fabric piece (6). Each trapezoidal fabric piece (2), (5), and (6) has three eyelets, and each trapezoidal fabric piece (3) has one eyelet, for a total of 28 eyelets. The 28 paracords of the cross-shaped umbrella pass through these 28 eyelets sequentially. The central gauze piece (1) is a circular mesh with a diameter of 1.7m, ensuring that the air inlet at the bottom edge of the umbrella canopy is not blocked and that inflation can proceed smoothly.

[0019] Place the sealing fabric at the bottom edge of the umbrella canopy, fold the umbrella canopy packaging and put it into the umbrella canopy cover. During the process of straightening and inflating the umbrella canopy, the air intake of the center yarn 1 of the sealing fabric makes the umbrella canopy fully inflated, and the tension at the bottom edge makes the sealing fabric slide slowly down the paracord, effectively preventing the bottom edge of the umbrella canopy from becoming disordered during the opening process and the problems of umbrella flipping and breaking caused by the paracord hitting the umbrella canopy.

[0020] This invention underwent nearly 200 dummy drop tests and live jump tests. The test results show that the device can effectively control the canopy opening procedure of the cross-shaped parachute. In high-speed and high-weight drop tests, the structure was stable and reliable, the opening procedure was clear, and the canopy was fully inflated in all tests. After adding the closure fabric structure, the cross-shaped parachute did not experience canopy damage caused by the parachute lines whipping against the canopy. The test results achieved the expected design effect. The invention has been verified as feasible and has achieved its design objectives.

Claims

1. A control structure for the opening procedure of a cross-shaped umbrella canopy, characterized in that: Including the center yarn of the closing fabric (1), trapezoidal fabric one (2), trapezoidal fabric two (3), perimeter reinforcement band (4), trapezoidal fabric three right (5), trapezoidal fabric three left (6), cross reinforcement band (7) and lifting loop (8); The center yarn (1) of the closing fabric is a large-mesh mesh. Two cross reinforcing strips (7) are sewn through the center point of the center yarn (1) to divide the center yarn (1) of the closing fabric into four pieces evenly. Trapezoidal fabric two (3) is sewn at the edge where the two cross reinforcing strips (7) connect with the edge of the center yarn (1). Two trapezoidal fabrics are evenly distributed between each pair of trapezoidal fabric two (3), of which 6 are trapezoidal fabric one (2), one is trapezoidal fabric three right (5), and one is trapezoidal fabric three left (6). Trapezoidal fabric three right (5) and trapezoidal fabric three left (6) are symmetrically distributed on the left and right sides of any trapezoidal fabric two (3). A reinforcing band (4) is sewn around the seam of trapezoidal fabric 1 (2), trapezoidal fabric 2 (3), trapezoidal fabric 3 right (5), trapezoidal fabric 3 left (6) and the center yarn of the closing fabric (1) for fixing and reinforcing.

2. The control structure for the opening procedure of the cross-shaped umbrella canopy according to claim 1, characterized in that: Each trapezoidal cloth two (3) has one small eyelet, and each trapezoidal cloth one (2) has three small eyelets; each trapezoidal cloth three right (5) and trapezoidal cloth three left (6) has four eyelets, including three small eyelets and one large eyelet, with the large eyelet located between two small eyelets; the entire control structure has a total of 28 small eyelets and 2 large eyelets, each small eyelet can pass through a paracord, and the large eyelets on the left and right sides can be used for the control ropes on the left and right sides to pass through.

3. The control structure for the opening procedure of the cross-shaped umbrella canopy according to claim 1, characterized in that: A lifting loop (8) is sewn at the center of the two cross-shaped reinforcing bands (7) to control the lifting structure during folding.

4. The control structure for the opening procedure of the cross-shaped umbrella canopy according to claim 1, characterized in that: Add air ducts to the bottom edge of the umbrella canopy.

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