Umbrella rib structure with telescopic pull rope

Abstract

The pull rope telescopic umbrella rib structure comprises a middle rod, a plurality of short ribs, a plurality of telescopic long ribs, an upper nest connected to the top end of the middle rod and a lower nest connected to the peripheral face of the middle rod in a sliding mode, the bottom ends of the short ribs are pivoted to one side of the lower nest, and each telescopic long rib comprises a lower long rib, a flexible rope and a sliding rope assembly used for assisting the flexible rope in sliding. The sliding rope assembly is arranged on the side circumferential face of the upper nest, and one end of the flexible rope is fixedly connected with the top end of the lower long rib. The other end of the flexible rope is fixedly connected with one end of the lower nest after winding around the sliding rope assembly, and the top end of the short rib is pivoted to the top end of the lower long rib. The flexible rope is combined with the sliding rope assembly to replace a rigid movable umbrella rib in an original telescopic umbrella rib, so that the whole umbrella is opened and closed more smoothly in a labor-saving mode, meanwhile, the weight of the telescopic umbrella rib is reduced, and the whole umbrella has the advantages that the umbrella is opened and closed in a labor-saving mode, and the structure is light.

Description

Technical Field

[0001] The present invention belongs to the field of umbrellas, and more particularly, relates to a pull-cord telescopic umbrella rib structure. Background Art

[0002] An umbrella is a tool people use to protect themselves from wind, rain or sun. Currently, common umbrellas can be roughly divided into folding umbrellas and wind-resistant umbrellas according to their structures. Among them, folding umbrellas are widely used because they are easy to carry. The length of the ribs of traditional folding umbrellas is fixed, and the folded volume of such folding umbrellas is proportional to the rain-shielding area of ​​the umbrella surface. That is, if the rain-shielding area of ​​the umbrella surface increases, the folded volume of the folding umbrella increases, which is inconvenient to carry. Conversely, if the folded volume of the folding umbrella decreases, the sun / rain shading area of ​​the umbrella surface decreases. For this reason, folding umbrellas with retractable ribs have appeared on the market, which can achieve a small folded volume while ensuring a large umbrella surface area.

[0003] At present, the existing Chinese patent with the announcement number CN217390143U discloses a retractable umbrella rib structure, including a middle rod, a short rib, a telescopic long rib, an upper nest, a lower nest, a pivot seat and a connecting piece. One end of the short rib is pivotally connected to the lower nest, and the pivot seat is coaxially connected to the upper end of the middle rod; the two ends of the connecting piece are respectively pivotally connected to the pivot seat and the short rib. The telescopic long rib includes an upper long rib and a lower long rib. One end of the upper long rib is pivotally connected to the upper nest, and one end of the lower long rib is provided with a telescopic groove for telescoping the upper long rib. A hinge portion is provided between the end of the lower long rib facing the upper long rib and the short rib, and the other end of the short rib is hinged to the hinge portion. The side of the telescopic groove facing the hinge portion is an opening for one side of the short rib to pass through. Through the telescopic long ribs and the opening, the folded volume of the umbrella ribs is small while ensuring a large umbrella surface area.

[0004] However, in actual use, since both the upper and lower long bones are made of relatively hard materials such as aluminum alloy, and the upper and lower long bones are telescopically connected to each other, when the short bone drives the lower long bone to open and close the umbrella, the lower long bone will be affected by the friction generated between the upper long bone and the telescopic groove and the inertial resistance of the upper long bone, so that the short bone encounters greater resistance when pushing or pulling down the lower long bone, and a greater push / pull force is required when opening and closing the umbrella, resulting in difficulty in opening and closing the umbrella; in addition, the setting of the telescopic ribs, although reducing the folded volume of the ribs, essentially increases the overall length and weight of the long bones after the umbrella is opened, that is, increases the weight of the entire umbrella. Therefore, there is an overall problem that opening and closing the umbrella is laborious and the structure is not light enough. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a pull-cord telescopic umbrella rib structure, which has the advantages of saving effort in opening and closing the umbrella and having a lightweight structure.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cord-pull telescopic umbrella rib structure, comprising a middle rod, a plurality of short bones, a plurality of telescopic long bones, an upper nest connected to the top end of the middle rod, and a lower nest slidably connected to the outer circumference of the middle rod, the bottom end of the short bone is pivotally connected to one side of the lower nest, the telescopic long bone comprises a lower long bone, a flexible rope and a sliding rope assembly for assisting the sliding of the flexible rope, the sliding rope assembly is arranged on the side circumference of the upper nest, one end of the flexible rope is fixedly connected to the top end of the lower long bone; the other end of the flexible rope is fixedly connected to one end of the lower nest after passing through the sliding rope assembly, and the top end of the short bone is pivotally connected to the top end of the lower long bone.

[0008] It is further configured that: the sliding rope assembly includes a pulley and a connecting shaft, and the pulley is connected to the side of the upper nest through the connecting shaft; or the sliding rope assembly includes a sliding rod, and the sliding rod is provided with an arc-shaped limiting groove or an arc-shaped sliding surface for sliding contact of the flexible rope.

[0009] It is further configured that the pivotal connection between the bottom end of the short bone and one side of the lower nest is a first pivotal connection point, the other end of the flexible rope is located between the first pivotal connection point and the middle rod on the same side, and an arc-shaped concave surface or opening for accommodating the flexible rope is provided on the side of the short bone close to the middle rod.

[0010] It is further configured that: the minimum vertical distance between the sliding rope assembly and the axis of the middle rod is greater than the vertical distance between the outer side of the other end of the flexible rope and the axis of the middle rod.

[0011] Further configuration: the flexible rope is a thin steel rope or a nylon rope or a brown rope.

[0012] It is further provided that the connection between one end of the flexible rope and the top end of the lower long bone is a detachable connection, and the connection between the other end of the rope and the lower nest is also a detachable connection.

[0013] It is further provided that a side surface of the upper nest is provided with a clearance groove for accommodating the sliding rope assembly and the flexible rope to pass through, and the sliding rope assembly is installed in the clearance groove.

[0014] It is further configured that: when the umbrella is folded, the highest point of the top of the lower long bone is lower than the bottom surface of the upper nest.

[0015] It is further configured that: the outer side surface of the upper nest is fixedly connected with a rotating seat, and the sliding rope assembly is connected to the upper nest through the rotating seat.

[0016] It is further provided that: the top end of the lower long bone is provided with a protective structure for preventing the umbrella surface from being damaged.

[0017] When the umbrella needs to be closed, the lower nest is manually pulled downward, and the short rib pulls down to retract the lower rib. At the same time, since the other end of the flexible rope moves downward with the lower nest, the lower long rib is also subjected to the closing tension of one end of the flexible rope, so that the downward pulling resistance of the short rib is smaller, that is, folding the umbrella is more time-saving and labor-saving.

[0018] The present invention utilizes flexible ropes in combination with sliding rope assemblies to replace the rigid movable ribs in the original telescopic umbrella ribs, thereby ensuring that the original ribs have the advantages of a larger unfolding area and a small volume when the umbrella is folded when extended, making the overall opening and closing of the umbrella smoother and more labor-saving, while reducing the weight of the telescopic umbrella ribs. The overall umbrella has the advantages of labor-saving opening and closing and a lightweight structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0020] Figure 2 It is a partial cross-sectional view of embodiment 1 of the present invention;

[0021] Figure 3 A partial enlarged view of A in Example 1 of the present invention;

[0022] Figure 4 Schematic diagram of the structure of two short bones in Example 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention;

[0025] Figure 7 This is a partial enlarged view of B in Example 3 of the present invention;

[0026] Figure 8 A partial cross-sectional view of a sliding rod with an arc-shaped sliding surface in a third embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the overall structure of the fourth embodiment of the present invention;

[0028] Figure 10 This is a partial enlarged view of C in the fourth embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the overall structure of embodiment 5 of the present invention.

[0030] In the figure: 1. Middle rod; 2. Short bone; 3. Upper nest; 4. Lower nest; 5. Telescopic long bone; 6. Lower long bone; 7. Flexible rope; 8. Sliding rope assembly; 9. Pulley; 10. Connecting shaft; 11. Sliding rod; 12. Arc-shaped sliding surface; 13. Arc-shaped limiting groove; 14. Rotating seat; 15. First pivot point; 16. Arc-shaped concave surface; 17. Opening; 18. Make way groove; 19. Protective structure; 20. Arc-shaped baffle. DETAILED DESCRIPTION

[0031] In order to explain the technical content, purpose and effect of the present invention in detail, the following is a description of the embodiments and the accompanying drawings. It should be noted that the words "upper" and "lower" used in the following description refer to the attached drawings. Figure 1 In the directions, the words "bottom" and "top" refer to the Figure 1 In the direction toward the geometric center of a specific component; it should be noted that the "sliding rope assembly" in the full text is a structure that can assist the sliding of the flexible rope, especially refers to a structure that can reduce the sliding friction of the flexible rope, such as a pulley or roller or roller or sliding rod, and the pulley or roller or roller or sliding rod can be rotatable or non-rotatable.

[0032] The key concept of the present invention is to use flexible ropes 7 to replace the rigid movable ribs in the original telescopic umbrella ribs, combined with the sliding rope assembly 8, to reduce the resistance of the short ribs 2 during the opening and closing process of the umbrella, making the overall opening and closing smoother and more labor-saving, and reducing the weight of the entire umbrella ribs. The telescopic distance of the telescopic umbrella ribs of the present invention is the difference between the vertical distance between the upper and lower nests when the umbrella is folded and the vertical distance between the upper and lower nests when the umbrella is opened. The overall advantage is that the umbrella can be opened and closed with less labor and the structure is lightweight.

[0033] Please refer to Figures 1 to 11 As shown, a rope-pull telescopic umbrella rib structure includes a middle rod 1, a plurality of short bones 2, a plurality of telescopic long bones 5, an upper nest 3 connected to the top end of the middle rod 1 and a lower nest 4 slidably connected to the outer circumference of the middle rod 1, the bottom end of the short bone 2 is pivotally connected to one side of the lower nest 4, the telescopic long bone 5 includes a lower long bone 6, a flexible rope 7 and a sliding rope assembly 8, the sliding rope assembly 8 is arranged on the side circumference of the upper nest 3, one end of the flexible rope 7 is fixedly connected to the top end of the lower long bone 6; the other end of the flexible rope 7 is fixedly connected to one end of the lower nest 4 after passing through the sliding rope assembly 8, and the top end of the short bone 2 is pivotally connected to the top end of the lower long bone 6.

[0034] As can be seen from the above description, when the parachute needs to be opened, the lower nest 4 is manually pushed upward. Initially, the flexible rope 7 is in a relaxed state. Under the pushing action of the short bone 2, the short bone 2 is only subjected to the resistance of the lower long bone 6. The lower long bone 6 unfolds in the direction away from the middle rod 1, driving one end of the flexible rope 7 to move in the direction away from the middle rod 1 until one end of the flexible rope 7 is taut. As the lower nest 4 moves upward and under the action of the sliding rope assembly 8, the flexible rope 7 passes through the pulley 9 and moves smoothly in the direction away from the middle rod 1 until the flexible rope 7 is tightened. When the lower long bone 6 is fully extended, that is, the umbrella surface is fully opened, at this time, the two ends of the flexible rope 7 are tightened, and the telescopic umbrella ribs can be easily opened; when it is necessary to close the umbrella, the lower nest 4 is manually pulled downward, and the short bone 2 is pulled down to drive the lower long bone 6 to fold. At the same time, since the other end of the flexible rope 7 moves downward with the lower nest 4, the lower long bone 6 is also subjected to the pulling force of one end of the flexible rope 7, so that the downward pulling resistance of the short bone 2 is smaller, that is, folding the umbrella is more time-saving and labor-saving. When the lower nest 4 is pulled down to its original position, the umbrella is folded;

[0035] Flexible ropes 7 are used to replace the rigid movable ribs in the original telescopic umbrella ribs, combined with the sliding rope assembly 8, so that the overall opening and closing is smoother and more labor-saving. The telescopic distance of the telescopic umbrella ribs is the difference between the vertical distance between the upper and lower nests when the umbrella is folded and the vertical distance between the upper and lower nests when the umbrella is opened.

[0036] Furthermore, the sliding rope assembly 8 includes a pulley 9 and a connecting shaft 10, and the pulley 9 is connected to the side of the upper nest 3 through the connecting shaft 10; or the sliding rope assembly 8 includes a sliding rod 11, and the sliding rod 11 is provided with an arc-shaped limiting groove 13 or an arc-shaped sliding surface 12 for sliding contact of the flexible rope 7.

[0037] As can be seen from the above description, when opening or closing the umbrella, the lower nest 4 is manually pushed upward or pulled downward. Under the pushing or pulling action of the short bone 2, the lower long bone 6 is opened or closed, driving one end of the flexible rope 7 to move away from or close to the upper nest 3, and the other end of the flexible rope 7 is raised and lowered in the direction of approaching or away from the upper nest 3. Under the action of the arc-shaped limiting groove 13 of the pulley 9 or the sliding rod 11 or the arc-shaped sliding surface 12 of the sliding rod 11, the friction force of the upward and downward sliding of the flexible rope 7 is reduced, and the pulley 9 is rotated or fixed to the side of the upper nest 3 through the connecting shaft 10; wherein, the flexible rope 7 passing through the sliding rod 11 slides in a direction in the arc-shaped limiting groove 13, avoiding the flexible rope 7 from slipping off the pulley 9 during the process of closing the umbrella; the advantage of using an ordinary sliding rod 11 compared to the pulley 9 is that the sliding rod 11 is lighter than the pulley 9.

[0038] Furthermore, the pivotal connection between the bottom end of the short bone 2 and one side of the lower nest 4 is a first pivot point 15, and the other end of the flexible rope 7 is located between the first pivot point 15 and the middle rod 1 on the same side. The side of the short bone 2 close to the middle rod 1 is provided with an arc-shaped concave surface 16 or an opening 17 for accommodating the flexible rope 7.

[0039] From the above description, it can be seen that when the other end of the flexible rope 7 is located between the first pivot point 15 and the middle rod 1 on the same side, the curved concave surface 16 or the opening 17 is used to store the flexible rope 7 after the umbrella is folded, thereby further reducing the folded volume of the umbrella; at the same time, the provision of the curved concave surface 16 also prevents the flexible rope 7 from being damaged when it comes into contact with the short bone 2, thereby further reducing the folded volume of the umbrella and improving the service life of the flexible rope 7; similarly, another effect of providing the opening 17 is to further reduce the weight of the short bone 2, thereby further reducing the folded volume of the umbrella and further improving the lightness of the overall umbrella structure.

[0040] Furthermore, the minimum vertical distance a between the sliding rope assembly 8 and the axis of the middle rod 1 is greater than the vertical distance b between the outer side of the other end of the flexible rope 7 and the axis of the middle rod 1 .

[0041] From the above description, it can be seen that the purpose of setting the above distance a and distance b is to make the flexible rope located in a section between the upper nest and the lower nest. When the umbrella is in the folded state, this section of the rope is inclined outward toward the upper nest, further ensuring that the opening and closing of the umbrella is smooth and labor-saving.

[0042] Furthermore, the flexible rope 7 is a thin steel rope, a nylon rope or a coir rope.

[0043] As can be seen from the above description, the flexible rope 7 is made of thin steel rope, nylon rope or coir rope. The thin steel rope, nylon rope and coir rope have high wear resistance and tensile strength, which can improve the service life of the flexible rope 7.

[0044] Furthermore, the connection between one end of the flexible rope 7 and the top end of the lower long bone 6 is a detachable connection, and the connection between the other end of the rope and the lower nest 4 is also a detachable connection.

[0045] As can be seen from the above description, by setting the two ends of the flexible rope 7 to be detachably connected, when the flexible rope 7 is damaged, it only needs to be removed and replaced.

[0046] Furthermore, a side surface of the upper nest 3 is provided with a clearance groove 18 for accommodating the sliding rope assembly 8 and the flexible rope 7 to pass through, and the sliding rope assembly 8 is installed in the clearance groove 18.

[0047] From the above description, it can be seen that by arranging the sliding rope assembly 8 in the clearance groove 18, the volume occupied by the sliding rope assembly 8 is reduced. At the same time, the weight of the upper nest 3 is reduced, which further reduces the volume of the umbrella after folding and ensures a lighter structure.

[0048] Furthermore, when the umbrella is folded, the highest point of the top of the lower long bone 6 is lower than the bottom surface of the upper nest 3.

[0049] From the above description, it can be seen that the highest point of the top of the lower long bone 6 is set to be lower than the bottom surface of the upper nest 3. The purpose is to facilitate the folding of the top of the short bone 2 and the top of the lower long bone 6 under the upper nest 3 after the umbrella is folded, so that the umbrella can be folded more compactly, further reducing the folded volume of the umbrella, thereby further improving the lightness of the overall umbrella structure and reducing the folded volume.

[0050] Furthermore, a rotating seat 14 is fixedly connected to the outer side surface of the upper nest 3 , and the sliding rope assembly 8 is connected to the upper nest 3 via the rotating seat 14 .

[0051] As can be seen from the above description, connecting the sliding rope assembly 8 to the outer side surface of the upper nest 3 through the rotating seat 14 makes it more convenient to replace and use the flexible rope 7.

[0052] Furthermore, a protective structure 19 is provided at the top of the lower long bone 6 to prevent the umbrella surface from being damaged.

[0053] From the above description, it can be seen that the protective structure 19 prevents the umbrella surface from being damaged due to friction or collision between the right-angled edge of the top of the lower long bone 6 and the umbrella surface during the opening and closing process, thereby playing a role in protecting the umbrella surface.

[0054] Reference Figures 1 to 4 , the embodiment 1 provided by the present invention is:

[0055] A pull-cord telescopic umbrella rib structure comprises a middle rod 1, several short bones 2, several telescopic long bones 5, an upper nest 3 connected to the top end of the middle rod 1, and a lower nest 4 slidably connected to the outer circumference of the middle rod 1. The bottom end of the short bone 2 is pivotally connected to one side of the lower nest 4. The telescopic long bone 5 comprises a lower long bone 6, a flexible rope 7 and a sliding rope assembly 8. The sliding rope assembly 8 is arranged on the side circumference of the upper nest 3. One end of the flexible rope 7 is fixedly connected to the top end of the lower long bone 6; the other end of the flexible rope 7 is fixedly connected to one end of the lower nest 4 after passing through the sliding rope assembly 8. The top end of the short bone 2 is pivotally connected to the top end of the lower long bone 6.

[0056] The sliding rope assembly 8 includes a pulley 9 and a connecting shaft 10. The pulley 9 is rotatably or fixedly connected to the side of the upper nest 3 through the connecting shaft 10. The minimum vertical distance a between the sliding rope assembly 8 and the axis of the middle rod 1 is greater than the vertical distance b between the outer side of the other end of the flexible rope 7 and the axis of the middle rod 1; the flexible rope 7 is a thin steel cable or nylon rope or brown rope; in order to prevent the flexible rope 7 from detaching from the sliding rope assembly 8 during the process of folding the parachute, an arc-shaped baffle 20 can be fixedly connected to the side of the upper nest 3, and the arc-shaped baffle 20 is located on the side of the sliding rope assembly 8 close to the middle rod 1.

[0057] The pivotal connection between the bottom end of the short bone 2 and one side of the lower nest 4 is a first pivot point 15. The other end of the flexible cord 7 is located between the first pivot point 15 and the middle rod 1 on the same side. The side of the short bone 2 near the middle rod 1 is provided with an arcuate concave surface 16 or an opening 17 for accommodating the flexible cord 7. To improve the stability of the connection between the short bone 2 and the lower long bone 6, a connector (not shown in the figure, the same as above) can be hingedly connected between the side of the upper end of the short bone 2 away from the middle rod 1 and the side of the lower end of the lower long bone 6 near the middle rod 1. To reduce the volume of the folded umbrella, a clearance hole (not shown in the figure, the same as above) for the connector can be provided on the side of the short bone 2 away from the middle rod 1.

[0058] A side surface of the upper nest 3 is provided with a clearance groove 18 for accommodating the sliding rope assembly 8 and the flexible rope 7 to pass through, and the sliding rope assembly 8 is installed in the clearance groove 18.

[0059] The top of the lower long bone 6 is provided with a protective structure 19 to prevent the umbrella surface from being damaged. The protective structure 19 of this embodiment can be a protective cushion mounted on the outside of the top of the lower long bone 6, or it can be an arc-shaped surface arranged on the top of the lower long bone 6. It is not limited to the above-mentioned protective structure 19, and any other protective structure 19 can be used as long as it can prevent the umbrella surface from being damaged due to collision with the right-angled edge of the top of the lower long bone 6.

[0060] The difference between the second embodiment and the first embodiment is that Figure 5 As shown, when the umbrella is folded, the highest point of the top of the lower long bone 6 is lower than the bottom surface of the upper nest 3.

[0061] The difference between the third embodiment and the first embodiment is that Figures 6 to 8 As shown, the sliding rope assembly 8 includes a sliding rod 11, an arc-shaped baffle 20 is located above the side of the sliding rod 11 close to the middle rod 1, the sliding rod 11 is connected to the side of the upper nest 3, and the sliding rod 11 is provided with an arc-shaped limiting groove 13 or an arc-shaped sliding surface 12 for sliding contact of the flexible rope 7; if the sliding rod 11 is cylindrical, the sliding rod 11 can be rotatably or fixedly connected to the upper nest 3, such as Figure 8 As shown, if the sliding rod 11 is non-cylindrical, the sliding rod 11 is fixedly connected to the upper nest 3.

[0062] The fourth embodiment is different from the first embodiment in that Figure 9 and Figure 10 As shown, the outer side surface of the upper nest 3 is fixedly connected to a rotating seat 14 , and the sliding rope assembly 8 is connected to the upper nest 3 through the rotating seat 14 .

[0063] The fifth embodiment is different from the first embodiment in that Figure 11As shown, the connection between one end of the flexible rope 7 and the top of the lower long bone 6 is a detachable connection, and the connection between the other end of the flexible rope 7 and the lower nest 4 is also a detachable connection; the figure of this embodiment shows that the detachable connection is to set a card slot on the lower nest 4 and the lower long bone 6, and set a card block at both ends of the flexible rope 7. The card block is connected to the card slot, so that the two ends of the flexible rope 7 are detachably connected to the lower long bone 6 and the lower nest 4 respectively. The present invention is not limited to this detachable connection method. Others such as bundling connection method, plug-in block plug-in connection method, etc., as long as the two ends of the flexible rope 7 can be detachably connected, are acceptable.

[0064] In summary, compared with the prior art, the present invention has the advantages of labor-saving opening and closing of the umbrella and light structure; when the umbrella needs to be opened, the lower nest 4 is pushed upward manually. In the process of the short bone 2 pushing the long bone to unfold, the flexible rope 7 is in a relaxed state at the beginning. The short bone 2 is only subject to the resistance of the lower long bone 6. The short bone 2 easily pushes the lower long bone 6 to unfold in the direction away from the middle rod 1. One end of the flexible rope 7 first moves with the lower long bone 6 in the direction away from the middle rod 1 until one end of the flexible rope 7 is tightened. As the lower nest 4 moves upward and the sliding rope assembly 8 assists in sliding, the flexible rope 7 The winding pulley 9 moves smoothly in the direction away from the middle rod 1 until the lower long bone 6 is fully unfolded, that is, the umbrella surface is fully opened. At this time, the two ends of the flexible rope 7 are tightened, and the umbrella can be easily opened. When the umbrella needs to be closed, the lower nest 4 is manually pulled downward, and the short bone 2 pulls down to drive the lower long bone 6 to fold. At the same time, since the other end of the flexible rope 7 moves downward with the lower nest 4, the lower long bone 6 is also subjected to the folding tension of one end of the flexible rope 7, which makes the short bone 2 subjected to smaller downward pulling resistance. When the lower nest 4 is pulled down to its original position, the umbrella is folded, and the umbrella can be easily folded.

[0065] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cord-operated retractable umbrella rib structure comprising a central rod, a plurality of short ribs, a plurality of retractable long ribs, an upper nest connected to the top of the central rod, and a lower nest slidably connected to the outer circumference of the central rod, wherein the bottom end of the short rib is pivotally connected to one side of the lower nest, and is characterized by: The telescopic long bone includes a lower long bone, a flexible rope and a sliding rope assembly for assisting the sliding of the flexible rope. The sliding rope assembly is arranged on the side circumference of the upper nest. One end of the flexible rope is fixedly connected to the top end of the lower long bone; the other end of the flexible rope is fixedly connected to one end of the lower nest after passing through the sliding rope assembly, and the top end of the short bone is pivotally connected to the top end of the lower long bone.

2. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The sliding rope assembly includes a pulley and a connecting shaft, and the pulley is connected to the side of the upper nest through the connecting shaft; or the sliding rope assembly includes a sliding rod, and the sliding rod is provided with an arc-shaped limiting groove or an arc-shaped sliding surface for sliding contact of the flexible rope.

3. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The pivotal connection between the bottom end of the short bone and one side of the lower nest is a first pivot point, the other end of the flexible rope is located between the first pivot point and the middle rod on the same side, and the side of the short bone close to the middle rod is provided with an arc-shaped concave surface or opening for accommodating the flexible rope.

4. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The minimum vertical distance between the sliding rope assembly and the axis of the middle rod is greater than the vertical distance between the outer side of the other flexible telescopic end and the axis of the middle rod.

5. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The flexible rope is a thin steel rope, a nylon rope or a brown rope.

6. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The connection between one end of the flexible rope and the top end of the lower long bone is a detachable connection, and the connection between the other end of the rope and the lower nest is also a detachable connection.

7. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: A side surface of the upper nest is provided with a clearance groove for accommodating the sliding rope assembly and the flexible rope to pass through, and the sliding rope assembly is installed in the clearance groove.

8. The pull-cord telescopic umbrella rib structure according to claim 7, characterized in that: When the umbrella is folded, the highest point of the top of the lower long bone is lower than the bottom surface of the upper nest.

9. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The outer side surface of the upper nest is fixedly connected with a rotating seat, and the sliding rope assembly is connected to the upper nest through the rotating seat.

10. The pull-cord telescopic umbrella rib structure according to claim 1, characterized in that: The top end of the lower long bone is provided with a protective structure for preventing the umbrella surface from being damaged.

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