Umbrella handle assembly equipment

Abstract

The present invention relates to an umbrella handle assembly device applied to the field of assembly equipment, comprising a support seat and a driving mechanism, a positioning ring is installed on the upper end of the support seat, a plurality of movable blocks are arranged on the inner side of the positioning ring, and the plurality of movable blocks form a circular ring shape, a conical surface is arranged on the side of the movable block close to the driving mechanism, and the conical surfaces on the plurality of movable blocks form a conical hole, an elastic reset member is installed between the movable block and the positioning ring, an elastic limiting component is installed on the side end of the movable block close to the conical surface, a stopper is fixed on the inner wall of the positioning ring, and a limit release component is installed on the driving mechanism, and the positioning ring and the movable block cooperate to squeeze the assembly end of the umbrella tube while assembling the umbrella tube and the handle, so that the assembly end of the umbrella tube is squeezed into a cone shape, which can increase the fault tolerance when plugging it with the handle, thereby making the plugging between the two smoother and achieving a better assembly effect.

Description

Technical Field

[0001] The present invention relates to an assembly device, in particular to an umbrella handle assembly device applied in the field of assembly devices. Background Art

[0002] There are more and more automated equipment in umbrella production, but in terms of umbrella assembly, most of them are still assembled semi-manually and semi-equipmentally. This not only affects production efficiency, but also makes it difficult to ensure the consistency of product quality. In addition, since it is all operated by humans, some production accidents are inevitable, which brings troubles to the company.

[0003] In order to improve the above problems, after searching, the specification of the patent application number CN201711499161.X discloses an automatic installation device for the plastic handle of an umbrella, including an umbrella body storage device, a chain transmission device, an umbrella switch position adjustment device, an umbrella middle rod heating device, an umbrella handle storage device and an umbrella handle installation device, wherein the umbrella body storage device is arranged at the inlet end of the chain transmission device, the umbrella handle storage device is arranged at the outlet end of the chain transmission device on the side where the umbrella body middle rod is located, and the umbrella switch position adjustment device, the umbrella middle rod heating device and the umbrella handle installation device are arranged in sequence and are all located on the side of the chain transmission device close to the umbrella body middle rod. Compared with the prior art, not only the installation efficiency between the plastic handle and the umbrella body is greatly improved, but also the consistency of the position of the umbrella switch and the plastic handle is ensured, thereby ensuring the high quality of the umbrella.

[0004] However, based on the above search and in combination with the prior art, it is found that in the prior art, the automatic umbrella handle installation devices similar to those disclosed above all plug and assemble the umbrella tube and the handle one by one, which requires ensuring the alignment accuracy between the umbrella tube and the handle, otherwise the assembly fails. However, in actual applications, it is difficult to ensure that the handle and the umbrella tube are completely aligned, which leads to low assembly efficiency. Although a few umbrella tubes are shaped before assembly to ensure accurate assembly between the umbrella tube and the handle, the shaping is generally performed separately, which undoubtedly also reduces the assembly efficiency and increases the processing energy consumption. Therefore, an umbrella handle assembly device is provided to improve the above problems. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that it is difficult to ensure that the handle and the umbrella tube are completely aligned, resulting in low assembly efficiency; although a few umbrella tubes are shaped before assembly to ensure precise assembly between the umbrella tube and the handle, the shaping is generally performed separately, which undoubtedly also reduces the assembly efficiency and increases the processing energy consumption.

[0006] In order to solve the above problems, the present invention provides an umbrella handle assembly device, including a support seat and a driving mechanism:

[0007] A positioning ring is installed at the upper end of the support seat, and a plurality of movable blocks are arranged on the inner side of the positioning ring, and the plurality of movable blocks form a circular ring shape;

[0008] A conical surface is arranged on one side of the movable block close to the driving mechanism, and the conical surfaces on the plurality of movable blocks form a conical hole, and an elastic reset member 1 is installed between the movable block and the positioning ring;

[0009] An elastic limiting component is installed on the side end of the movable block close to the conical surface, and a stopper for limiting the elastic limiting component is fixed on the inner wall of the positioning ring;

[0010] The driving mechanism is provided with a limit release component for releasing the limit effect between the elastic limit component and the stop block.

[0011] In the above-mentioned umbrella handle assembly device, through the cooperation between the arranged positioning ring and the movable block, the assembly end of the umbrella tube can be squeezed while the umbrella tube and the handle are assembled, so that the assembly end of the umbrella tube is squeezed into a cone shape, which can increase the fault tolerance when plugging it with the handle, thereby making the plugging between the two smoother and the assembly effect better.

[0012] As a further supplement to the present application, a limiting slide rod is fixed to the side end of the movable block close to the inner wall of the positioning ring, and a limiting slide hole is provided on the positioning ring for the limiting slide rod to slide through; the limiting slide rod cooperates with the limiting slide hole to enable the movable block to expand outward in a direction inside the positioning ring when squeezed by the umbrella tube, thereby avoiding deformation of the elastic reset part in a non-working direction, and at the same time ensuring that the movable block is accurately reset under the elastic action of the elastic reset part.

[0013] As a further supplement to the present application, the elastic limiting assembly includes an elastic reset member 2 and a limiting block;

[0014] A groove is provided at the side end of the movable block close to the conical surface, and the limit block slides on the inner side of the groove through the elastic reset member 2; during the initial period when the driving mechanism horizontally squeezes the umbrella tube, the assembly end of the umbrella tube enters the inner side of the conical hole surrounded by multiple conical surfaces to be squeezed, and the assembly end of the umbrella tube after squeezing is conical, and then the driving mechanism continues to squeeze the umbrella tube horizontally. At this time, the limit release component on the driving mechanism contacts and squeezes the limit block, so that the limit block enters the groove. At this time, the stopper loses its limiting effect on the limit block, and the movable block expands and moves outward under the squeezing effect of the umbrella tube, thereby stopping the squeezing and deformation effect on the umbrella tube, and the umbrella tube is pushed to the other side of the positioning ring by the driving mechanism, and is plugged into and matched with the handle to complete the assembly operation.

[0015] As a further supplement to the present application, a tube pressing protrusion is fixed on the inner wall of the conical surface, and a V-shaped trustee structure is fixed on the side end of the positioning ring close to the driving mechanism; the V-shaped trustee structure is used to support the umbrella tube and will not hinder the movement of the release assembly.

[0016] As a further supplement to the present application, the limit release assembly includes a first magnetic attraction ring, a second magnetic attraction ring, a guide slide rod and a pressure block;

[0017] The first magnetic ring is fixedly sleeved on the outer side of the driving mechanism, the second magnetic ring is slidably sleeved on the outer side of the driving mechanism, the first magnetic ring is located between the second magnetic ring and the positioning ring, and the first magnetic ring and the second magnetic ring attract each other;

[0018] A plurality of guide slide bars and pressure blocks are provided correspondingly, and the plurality of pressure blocks are fixed one by one to the ends of the plurality of guide slide bars close to the positioning rings, and the plurality of pressure blocks are horizontally provided one by one to the plurality of limit blocks, and the guide slide bars slide horizontally and penetrate the first magnetic attraction ring, and the two ends of the guide slide bars are respectively fixed to the ends of the pressure blocks and the second magnetic attraction ring;

[0019] Both sides of the first magnetic attraction ring and the second magnetic attraction ring are provided with openings for the V-shaped hosting structure to pass through;

[0020] Through the cooperation of the first magnetic ring, the second magnetic ring, the guide slide bar and the pressure block, after the assembly end of the umbrella tube is squeezed into a cone shape, the driving mechanism continues to squeeze the umbrella tube horizontally. At this time, the guide slide bar brings the pressure block to contact and squeeze the limit block, so that the limit block enters the groove. At this time, the stop block loses its limiting effect on the limit block, and the movable block expands and moves outward under the squeezing action of the umbrella tube, thereby stopping the squeezing and deformation action on the umbrella tube. Thereafter, when the driving mechanism continues to squeeze the umbrella tube, the guide slide bar is forced to reversely squeeze the second magnetic ring, and the second magnetic ring is separated from the first magnetic ring. At this time, the second magnetic ring slides toward the side away from the positioning ring, and will not hinder the action of the driving mechanism to squeeze the umbrella tube.

[0021] As a further supplement to the present application, a limiting ring is provided on the side of the second magnetic ring away from the first magnetic ring, the limiting ring is sleeved on the outer side of the driving mechanism and fixed to the support seat; after the assembly is completed, during the process of resetting the driving mechanism with the first magnetic ring, the limiting ring can be used to limit the second magnetic ring, so that the second magnetic ring and the first magnetic ring can be re-engaged to prepare for the next assembly action.

[0022] As a further supplement to the present application, the distance between the first magnetic ring and the driving mechanism close to the movable block is greater than the horizontal length of the movable block, ensuring that the driving mechanism can completely push the umbrella tube away from the movable block.

[0023] As a further supplement to the present application, the diameter of the maximum arc surface of the conical surface surrounded by multiple conical surfaces is larger than the outer diameter of the umbrella tube, ensuring that the umbrella tube can be completely surrounded by the conical surface, thereby ensuring that the umbrella tube can be smoothly inserted into the inner side of the circular ring composed of multiple movable blocks.

[0024] In summary, during the initial period when the driving mechanism horizontally squeezes the umbrella tube, the assembly end of the umbrella tube enters the inner side of the conical hole surrounded by multiple conical surfaces to be squeezed. After being squeezed, the assembly end of the umbrella tube is conical. Through the cooperation of the first magnetic ring, the second magnetic ring, the guide slide bar and the pressure block, the assembly end of the umbrella tube is squeezed into a cone. Then, the driving mechanism continues to squeeze the umbrella tube horizontally. At this time, the guide slide bar brings the pressure block to contact and squeeze the limit block, so that the limit block enters the groove. At this time, the stop block loses its limiting effect on the limit block, and the movable block expands and moves outward under the squeezing effect of the umbrella tube, thereby stopping the squeezing and deformation effect on the umbrella tube. Thereafter, As the driving mechanism continues to squeeze the umbrella tube, the guide slide bar is forced to squeeze the second magnetic attraction ring in the reverse direction, and the second magnetic attraction ring is separated from the first magnetic attraction ring. At this time, the second magnetic attraction ring slides toward the side away from the positioning ring, and will not hinder the action of the driving mechanism to squeeze the umbrella tube. Finally, the umbrella tube is completely pushed to the other side of the positioning ring by the driving mechanism, and is plugged into and matched with the handle to complete the assembly operation. After the assembly is completed, when the driving mechanism is resetting the first magnetic attraction ring with the first magnetic attraction ring, the limiting ring can be used to limit the second magnetic attraction ring, so that the second magnetic attraction ring and the first magnetic attraction ring are re-attracted to prepare for the next assembly action. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application before assembly;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application in the initial assembly state;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application in the assembled state;

[0028] Figure 4 This is a schematic diagram of a three-dimensional structure of a plurality of movable blocks in a combined state according to the first embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application in which the plurality of movable blocks are in an outwardly expanded state;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the release assembly of the first embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the positioning ring of the first embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the movable block of the first embodiment of the present application;

[0033] Fig. 9This is a schematic plan view of the structure of the umbrella tube and the handle in the assembled state according to the first embodiment of the present application.

[0034] Description of the numbers in the figure:

[0035] 1. Support seat; 2. Positioning ring; 21. Movable block; 211. Conical surface; 212. Elastic reset member 1; 213. Pipe pressing protrusion; 214. Limiting slide bar; 215. Groove; 216. Elastic reset member 2; 217. Limiting block; 22. Limiting slide hole; 23. Stopper; 3. Driving mechanism; 4. V-type hosting structure; 5. First magnetic ring; 6. Second magnetic ring; 7. Guide slide bar; 8. Pressing block; 9. Opening; 10. Limiting ring. DETAILED DESCRIPTION

[0036] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] The present invention provides an umbrella handle assembly device, see Figure 1-3 , including a support base 1 and a driving mechanism 3, wherein the driving mechanism 3 adopts conventional driving equipment assembled in the prior art, such as hydraulic cylinders, air cylinders, electric push rods and other equipment.

[0039] A positioning ring 2 is installed at the upper end of the support seat 1, and a plurality of movable blocks 21 are arranged on the inner side of the positioning ring 2, and the plurality of movable blocks 21 form a circular ring shape, and a conical surface 211 is arranged on the side of the movable block 21 close to the driving mechanism 3, and the conical surfaces 211 on the plurality of movable blocks 21 form a conical hole, and an elastic reset member 212 is installed between the movable block 21 and the positioning ring 2, and an elastic limiting component is installed on the side end of the movable block 21 close to the conical surface 211, and a stopper 23 for limiting the elastic limiting component is fixed on the inner wall of the positioning ring 2, and a release component for releasing the limiting effect between the elastic limiting component and the stopper 23 is installed on the driving mechanism 3.

[0040] Through the cooperation between the positioning ring 2 and the movable block 21, the assembly end of the umbrella tube can be squeezed when the umbrella tube and the handle are assembled, so that the assembly end of the umbrella tube is squeezed into a cone shape, such as Fig. 9 As shown, this can increase the fault tolerance when plugging with the handle, so that the plugging between the two is smoother and the assembly effect is better; when the driving mechanism 3 continues to squeeze the umbrella tube horizontally, the limit release component on the driving mechanism 3 contacts and squeezes the elastic limit component, so that the stopper 23 loses the limiting effect on the elastic limit component, and the movable block 21 expands and moves outward under the squeezing effect of the umbrella tube, thereby stopping the squeezing and deformation effect on the umbrella tube, and the umbrella tube is pushed to the other side of the positioning ring 2 by the driving mechanism 3, and is plugged with the handle to complete the assembly operation.

[0041] Among them, Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, a limiting slide rod 214 is fixed to the side end of the movable block 21 close to the inner wall of the positioning ring 2, and a limiting slide hole 22 is provided on the positioning ring 2 for the limiting slide rod 214 to slide through; the limiting slide rod 214 cooperates with the limiting slide hole 22 to enable the movable block 21 to expand outwardly on the inner side of the positioning ring 2 when being squeezed by the umbrella tube, thereby avoiding deformation of the elastic reset member 212 in a non-working direction, and at the same time ensuring that the movable block 21 is accurately reset under the elastic action of the elastic reset member 212.

[0042] Among them, Figure 8 As shown, the elastic limiting assembly includes an elastic reset member 216 and a limiting block 217, wherein the elastic reset member 1 212 and the elastic reset member 216 are preferably compression springs, and a groove 215 is provided at the side end of the movable block 21 close to the conical surface 211, and the limiting block 217 slides on the inner side of the groove 215 through the elastic reset member 216; during the initial period when the driving mechanism 3 horizontally squeezes the umbrella tube, the assembly end of the umbrella tube enters the inner side of the conical hole surrounded by multiple conical surfaces 211 to be squeezed, and the assembly end of the umbrella tube after squeezing is conical, and then the driving mechanism 3 continues to squeeze the umbrella tube horizontally. At this time, the limit release assembly on the driving mechanism 3 contacts and squeezes the limiting block 217, so that the limiting block 217 enters the groove 215, and at this time, the stopper 23 loses its limiting effect on the limiting block 217, and the movable block 21 expands and moves outward under the squeezing action of the umbrella tube, thereby stopping the squeezing and deformation action on the umbrella tube, and the umbrella tube is pushed to the other side of the positioning ring 2 by the driving mechanism 3, and is plugged with the handle to complete the assembly operation.

[0043] Among them, Figure 1 , Figure 4 and Figure 8 As shown, a tube pressing protrusion 213 is fixed on the inner wall of the conical surface 211, and a V-shaped trustee structure 4 is fixed on the side end of the positioning ring 2 close to the driving mechanism 3; the V-shaped trustee structure 4 is used to support the umbrella tube and will not hinder the movement of the release assembly.

[0044] Among them, Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the limit release component includes a first magnetic ring 5, a second magnetic ring 6, a guide slide 7 and a pressure block 8. The first magnetic ring 5 is fixedly sleeved on the outer side of the driving mechanism 3, and the second magnetic ring 6 is slidably sleeved on the outer side of the driving mechanism 3. The first magnetic ring 5 is located between the second magnetic ring 6 and the positioning ring 2, and the first magnetic ring 5 and the second magnetic ring 6 attract each other. There are multiple corresponding guide slides 7 and pressure blocks 8, and the multiple pressure blocks 8 are fixed one by one to the ends of the multiple guide slides 7 close to the positioning ring 2. The multiple pressure blocks 8 and the multiple limit blocks 217 are horizontally correspondingly arranged one by one. The guide slide 7 slides horizontally through the first magnetic ring 5, and the two ends of the guide slide 7 are respectively fixed to the ends of the pressure block 8 and the second magnetic ring 6. Both sides of the first magnetic ring 5 and the second magnetic ring 6 are provided with openings 9 for the V-shaped hosting structure 4 to pass through.

[0045] Through the cooperation of the first magnetic ring 5, the second magnetic ring 6, the guide slide bar 7 and the pressing block 8, after the assembly end of the umbrella tube is squeezed into a cone shape, the driving mechanism 3 continues to squeeze the umbrella tube horizontally. At this time, the guide slide bar 7 brings the pressing block 8 to contact and squeeze the limit block 217, so that the limit block 217 enters the groove 215. At this time, the stop block 23 loses its limiting effect on the limit block 217, and the movable block 21 expands and moves outward under the squeezing action of the umbrella tube, thereby stopping the squeezing and deforming action on the umbrella tube. Thereafter, when the driving mechanism 3 continues to squeeze the umbrella tube, the guide slide bar 7 is forced to reversely squeeze the second magnetic ring 6, and the second magnetic ring 6 is separated from the first magnetic ring 5. At this time, the second magnetic ring 6 slides toward the side away from the positioning ring 2, and will not hinder the action of the driving mechanism 3 to squeeze the umbrella tube.

[0046] Among them, Figure 1 , Figure 2 and Figure 3 As shown, a limit ring 10 is provided on the side of the second magnetic ring 6 away from the first magnetic ring 5, and the limit ring 10 is sleeved on the outer side of the driving mechanism 3 and fixed to the support seat 1; after the assembly is completed, during the process of resetting the driving mechanism 3 with the first magnetic ring 5, the limit ring 10 can be used to limit the second magnetic ring 6, so that the second magnetic ring 6 and the first magnetic ring 5 are re-attracted to prepare for the next assembly action.

[0047] Furthermore, the distance between the first magnetic ring 5 and the driving mechanism 3 close to the movable block 21 is greater than the horizontal length of the movable block 21 , ensuring that the driving mechanism 3 can completely push the umbrella tube away from the movable block 21 .

[0048] Furthermore, the diameter of the maximum arc surface of the conical surface surrounded by the multiple conical surfaces 211 is larger than the outer diameter of the umbrella tube, ensuring that the umbrella tube can be completely surrounded by the conical surface 211, thereby ensuring that the umbrella tube can be smoothly inserted into the inner side of the circular ring formed by the multiple movable blocks 21.

[0049] Compared with the prior art, in the present solution, by the cooperation of the movable block 21, the conical surface 211 and the elastic limiting assembly, during the initial period when the driving mechanism 3 horizontally squeezes the umbrella tube, the assembly end of the umbrella tube enters the inner side of the conical hole surrounded by the multiple conical surfaces 211 to be squeezed, and the assembly end of the umbrella tube after squeezing is conical. Through the cooperation of the first magnetic ring 5, the second magnetic ring 6, the guide slide bar 7 and the pressing block 8, after the assembly end of the umbrella tube is squeezed into a conical shape, the driving mechanism 3 continues to horizontally squeeze the umbrella tube. At this time, the guide slide bar 7 brings the pressing block 8 to contact and squeeze the limiting block 217, so that the limiting block 217 enters the groove 215. At this time, the stopper 23 loses its limiting effect on the limiting block 217, and the movable block 21 is squeezed by the umbrella tube. The first magnetic ring 5 is pressed against the second magnetic ring 6 by the driving mechanism 3, and the second magnetic ring 6 is separated from the first magnetic ring 5. At this time, the second magnetic ring 6 slides toward the side away from the positioning ring 2, and will not hinder the action of the driving mechanism 3 to squeeze the umbrella tube. Finally, the umbrella tube is completely pushed to the other side of the positioning ring 2 by the driving mechanism 3, and is plugged into the handle to complete the assembly operation. After the assembly is completed, the second magnetic ring 6 can be limited by the limiting ring 10 during the process of the driving mechanism 3 resetting the first magnetic ring 5, so that the second magnetic ring 6 and the first magnetic ring 5 are re-engaged to prepare for the next assembly action.

[0050] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An umbrella handle assembly device, comprising a support base (1) and a drive mechanism (3), characterized in that: A positioning ring (2) is installed at the upper end of the support seat (1), and a plurality of movable blocks (21) are arranged on the inner side of the positioning ring (2), and the plurality of movable blocks (21) form a circular ring shape; A conical surface (211) is provided on one side of the movable block (21) close to the driving mechanism (3); the conical surfaces (211) on a plurality of the movable blocks (21) form a conical hole; and an elastic reset member (212) is installed between the movable block (21) and the positioning ring (2); An elastic limiting component is installed on the side end of the movable block (21) close to the conical surface (211), and a stopper (23) for limiting the elastic limiting component is fixed on the inner wall of the positioning ring (2); The driving mechanism (3) is provided with a limit release component for releasing the limit effect between the elastic limit component and the stopper (23); The elastic limiting assembly comprises an elastic reset member 2 (216) and a limiting block (217); A groove (215) is provided at a side end of the movable block (21) close to the conical surface (211), and the limit block (217) slides on the inner side of the groove (215) via the second elastic reset member (216); A tube pressing protrusion (213) is fixed on the inner wall of the conical surface (211), and a V-shaped tube-holding structure (4) is fixed on the side end of the positioning ring (2) close to the driving mechanism (3); The release assembly comprises a first magnetic attraction ring (5), a second magnetic attraction ring (6), a guide slide rod (7) and a pressing block (8); The first magnetic attraction ring (5) is fixedly sleeved on the outer side of the driving mechanism (3), the second magnetic attraction ring (6) is slidably sleeved on the outer side of the driving mechanism (3), the first magnetic attraction ring (5) is located between the second magnetic attraction ring (6) and the positioning ring (2), and the first magnetic attraction ring (5) and the second magnetic attraction ring (6) attract each other; A plurality of guide slide bars (7) and pressure blocks (8) are provided correspondingly, and the plurality of pressure blocks (8) are fixed one by one to the ends of the plurality of guide slide bars (7) close to the positioning ring (2), and the plurality of pressure blocks (8) are horizontally provided one by one to the plurality of limit blocks (217), and the guide slide bar (7) slides horizontally through the first magnetic attraction ring (5), and the two ends of the guide slide bar (7) are respectively fixed to the ends of the pressure blocks (8) and the second magnetic attraction ring (6); Both sides of the first magnetic attraction ring (5) and the second magnetic attraction ring (6) are provided with openings (9) for the V-shaped hosting structure (4) to pass through; A limiting ring (10) is provided on a side of the second magnetic ring (6) away from the first magnetic ring (5), and the limiting ring (10) is sleeved on the outside of the driving mechanism (3) and fixed to the support seat (1); The distance between the first magnetic ring (5) and the driving mechanism (3) close to the movable block (21) is greater than the horizontal length of the movable block (21).

2. The umbrella handle assembly device according to claim 1, characterized in that: A limiting slide rod (214) is fixed to the side end of the movable block (21) close to the inner wall of the positioning ring (2), and a limiting slide hole (22) is provided on the positioning ring (2) for the limiting slide rod (214) to slide through.

3. The umbrella handle assembly device according to claim 1, characterized in that: The diameter of the largest arc surface of the conical surface surrounded by the multiple conical surfaces (211) is greater than the outer diameter of the umbrella tube.

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