Pin joint shaft nail structure of upper nest, lower nest and umbrella ribs of umbrella

The pivot pin structure simplifies the connection between the umbrella ribs and the upper and lower canopies, solving the problem of low umbrella assembly efficiency and enabling rapid umbrella assembly.

CN223554437UActive Publication Date: 2025-11-18FUJIAN YONGCHUN TIANFU RAIN GEAR CO LTD +1
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Patent Information

Application Number
CN202422799925.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2025-11-18
Estimated Expiration
2034-11-15

AI Technical Summary

Technical Problem

The existing umbrella frame connection method is cumbersome and affects assembly efficiency.

Method used

The umbrella ribs are connected by pivot pins in the pivot groove. The upper and lower nests are equipped with pivot parts and blocking structures. The limiting part of the pivot pins is used to lock and fix the umbrella ribs to the upper and lower nests, simplifying the connection between the umbrella ribs and the upper and lower nests.

Benefits of technology

It improves the assembly efficiency of umbrellas, simplifies the connection process between the umbrella ribs and the upper and lower fins, and is suitable for umbrellas with ribs, such as square umbrellas.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a pivot joint shaft nail structure of an upper nest, a lower nest and umbrella ribs of an umbrella, and belongs to the technical field of umbrellas. The umbrella comprises an umbrella cover, a middle rod, an upper nest, a lower nest and a plurality of umbrella ribs, and is characterized in that the upper nest and the lower nest are both provided with pivoting parts used for being connected with the umbrella ribs, pivoting grooves allowing the umbrella ribs to move are formed in the two sides of each pivoting part, through pivoting shaft holes are formed in the two sides of the pivoting grooves in the two sides, and pivoting shaft nails penetrate through the pivoting shaft holes in the two sides; when the umbrella ribs are installed, all the umbrella ribs can be directly placed in the pivot joint grooves, then the pivot joint shaft nail penetrates through each umbrella rib, the pivot joint shaft nail is fixed on the pivot joint portion through limiting structures located at the two ends of the pivot joint shaft nail, and the inner pivot joint ends of the umbrella ribs are arranged on the pivot joint shaft nail in a penetrating mode. The pivot joint shaft nails are fixed on the pivot joint parts through the blocking structures and the limiting parts, so that the umbrella ribs can be assembled with the upper nest and the lower nest, and compared with a traditional mode of fixing through winding iron wires, the assembling process is simpler and more convenient.
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Description

TECHNICAL FIELD

[0001] The utility model relates to umbrella technology field especially is a kind of upper and lower nest and umbrella rib pivot joint axle nail structure of umbrella. BACKGROUND

[0002] Umbrella is generally composed of canopy, middle stick as main support, several main umbrella ribs for supporting canopy, branch umbrella rib for opening canopy and umbrella head at the end of middle stick, main umbrella rib is connected on middle stick through upper nest, branch umbrella rib is connected on lower nest that can slide on middle stick, the connection of main umbrella rib and branch umbrella rib and upper nest and lower nest is generally that all umbrella ribs are threaded together by iron wire, then iron wire is tied on upper nest or lower nest, this assembly mode is more cumbersome, affect assembly efficiency, so a new type of umbrella is needed to solve this problem. SUMMARY

[0003] Other features and advantages of the present utility model will be set forth in the following description of the utility model, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present utility model. The objects and other advantages of the present utility model can be realized and obtained by the structure specifically pointed out in the description and other accompanying drawings of the description.

[0004] The utility model aims at overcoming the above-mentioned insufficient, provide a kind of upper and lower nest and umbrella rib pivot joint axle nail structure of umbrella.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a kind of upper and lower nest and umbrella rib pivot joint axle nail structure of umbrella, including canopy, middle stick, upper nest, lower nest and several umbrella ribs, it is characterized in that, the upper nest and lower nest are all provided with the pivot joint portion for being connected with umbrella rib, pivot joint groove for the umbrella rib movement is set in the two sides of the pivot joint portion, the two sides of the two sides pivot joint groove are all set with the pivot joint axle hole that passes through, the pivot joint axle nail is passed through in the two sides pivot joint axle hole, the one end of the pivot joint axle nail is provided with the limiting portion for limiting the pivot joint axle nail from the one end of the pivot joint axle hole and the pivot joint portion is provided with the blocking structure for limiting the pivot joint axle nail from the other end of the pivot joint axle hole and out, the umbrella rib is threaded on the pivot joint axle nail.

[0006] By adopting the above technical scheme, the umbrella rib can be connected to the pivot part by being penetrated on the pivot shaft pin, when the umbrella rib is installed, all the umbrella ribs can be directly placed in the pivot slot, then the pivot shaft pin is penetrated through each umbrella rib, the connection between the umbrella rib and the upper and lower nests can be realized, after the pivot shaft pin is completely penetrated through the pivot shaft hole, the limiting part on the pivot shaft pin prevents the pivot shaft pin from continuing to move forward, and by clamping the limiting part and the blocking structure, the pivot shaft pin cannot move backward out of the pivot shaft hole, in this way, the pivot shaft pin can be fixed in the pivot shaft hole, compared with the traditional fixing by winding the iron wire, the assembly process is simpler and more convenient, and the assembly efficiency is improved, and the scheme can be applied to the square umbrella and other umbrellas with umbrella ribs on only two sides of the upper and lower nests.

[0007] Preferably, the pivot shaft pin is L-shaped, the limiting part is a bent part at the end of the pivot shaft pin, and the pivot shaft pin has two, and the two pivot shaft pins are arranged in the pivot shaft holes on the two sides respectively, the L-shaped pivot shaft pin is used, after the vertical part of the pivot shaft pin completely enters the pivot shaft hole, the bent part as the limiting part of the pivot shaft pin abuts against the pivot part, so that the pivot shaft pin cannot continue to move forward, the clamping of the limiting part and the blocking structure can prevent the pivot shaft pin from moving backward out of the pivot shaft hole, and the rotation of the pivot shaft pin is limited, so that the pivot shaft pin cannot be separated from the blocking structure by rotating.

[0008] Preferably, the pivot shaft pin is U-shaped, the limiting part is a horizontal rod at the middle of the pivot shaft pin, and the parts on the two sides of the horizontal rod are vertical rods, and the vertical rods on the two sides are located in the pivot shaft holes on the two sides of the pivot part. The U-shaped pivot shaft pin is used, the two vertical rod parts on the two sides can be inserted into the pivot shaft holes on the two sides of the pivot part at the same time, the connection between the umbrella rib and the pivot part is realized, the middle horizontal rod part of the U-shaped structure abuts against the limiting part and the pivot part, so that the two vertical rods of the pivot shaft pin are prevented from continuing to enter the pivot shaft hole after the two vertical rods completely enter the pivot shaft hole, and the U-shaped pivot shaft pin can deform the horizontal rod part upward by the elasticity of the U-shaped pivot shaft pin, so as to overcome the blocking structure and be clamped in the blocking structure, so that the pivot shaft pin cannot move backward, thereby realizing the fixation of the pivot shaft pin.

[0009] Preferably, the blocking structure comprises a baffle plate fixedly connected with the pivot part, the baffle plate and the pivot part are provided with a placing groove for clamping the limiting part of the pivot pin, the limiting part abuts on the baffle plate, the baffle plate is provided with a clamping point for limiting the limiting part from turning out of the placing groove, the clamping point is provided with a plurality of clamping points, the distance between the clamping point and the bottom of the placing groove is smaller than the length of the limiting part, the utility model utilizes the abutment between the baffle plate fixed on one side of the pivot part and the limiting part on the pivot pin to prevent the pivot pin from coming out of the pivot hole, meanwhile, the clamping point on the baffle plate can limit the limiting part in the placing groove, so that the limiting part cannot come out of the placing groove, for the L-shaped pivot pin, after the pivot pin is inserted into the pivot hole, the horizontal part of the limiting part of the L-shaped pivot pin can be clamped between the clamping point and the bottom of the placing groove by rotating, the limiting part is clamped in the placing groove by the elastic deformation of the baffle plate, for the U-shaped pivot pin, when the U-shaped pivot pin is clamped in the placing groove, the middle horizontal rod part of the limiting part of the U-shaped pivot pin is pried upward, the elastic deformation of the U-shaped pivot pin makes the limiting part pass through the baffle plate and be clamped in the placing groove, thereby realizing the fixation of the U-shaped pivot pin.

[0010] Preferably, the two sides of the pivot groove are provided with limiting inclined surfaces, the utility model utilizes the limiting inclined surfaces to provide the activity space of the umbrella rib when being unfolded, and simultaneously limit the inclination direction of the umbrella rib, so that the umbrella rib can be unfolded according to the shape of the umbrella surface.

[0011] Preferably, the umbrella rib comprises a main umbrella rib and a branch umbrella rib, one main umbrella rib and one branch umbrella rib form an umbrella rib group, and the umbrella rib group is provided with at least three groups.

[0012] Preferably, the umbrella rib comprises a plurality of branch ribs, the plurality of branch ribs are rotatably connected with each other, the middle rod comprises a plurality of sleeve pipes, the sleeve pipes are nested in sequence, and the sleeve pipes are slidably connected with each other.

[0013] Preferably, the umbrella rib is arranged on the pivot pin through a pivot hole, and the diameter of the pivot hole is greater than that of the pivot pin.

[0014] In conclusion, the utility model has the beneficial effects that:

[0015] 1. By using pivot pins that pass through the pivot groove, the umbrella ribs can be connected to the pivot by passing through the pivot pins. When installing the umbrella ribs, all the umbrella ribs can be placed directly into the pivot groove, and then the pivot pins are passed through each umbrella rib. The limiting part on the pivot pin will prevent the pivot pin from moving forward. At the same time, by engaging the limiting part with the blocking structure, the pivot pin can not be dislodged from the pivot hole. In this way, the pivot pin can be fixed in the pivot hole. Compared with the traditional method of fixing by wrapping iron wire, the assembly process is simpler and more convenient, which helps to improve assembly efficiency.

[0016] 2. By using a baffle fixed on one side of the pivot part to abut against the limiting part on the pivot shaft pin, it can prevent the pin from coming out of the pivot shaft hole. At the same time, the locking point on the baffle can restrict the limiting part in the placement groove, preventing it from coming out of the placement groove.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0018] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0019] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0022] 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 only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a half-section structure of Example 1;

[0024] Figure 2 This is a schematic diagram of the structure of Example 2;

[0025] Figure 3 Figure is a schematic view of the hinge shaft pin structure of the example 2;

[0026] Figure 4 Figure is a schematic view of the hinge part cross section structure;

[0027] Figure 5 Figure is a schematic view of the umbrella front structure.

[0028] Main figure mark explanation: 1, rib; 2, hinge part; 3, hinge groove; 4, hinge shaft pin; 5, limit inclined surface; 6, supporting rib; 7, hinge hole; 8, limit part; 9, bending part; 10, horizontal rod; 11, middle stick; 12, upper nest; 13, lower nest; 14, sleeve; 15, branch rib; 16, hinge shaft hole; 17, umbrella surface; 18, main rib; 19, vertical rod; 20, baffle; 21, clamping point; 22, placing groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with specific implementation manners.It should be understood that the specific implementation manners described here are only used to explain the utility model, but not used to limit the utility model.

[0030] In addition, in the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0031] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship between two elements. But it is noted that direct connection means that the connection between the two main bodies does not pass through a transition structure to build a connection relationship, but only connects through a connecting structure to form a whole. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Embodiment 1

[0034] As shown in Figure 1 and Figure 3 A hinge structure of an upper nest 12 and a lower nest 13 and a rib 1, comprising a canopy 17, a middle rod 11, an upper nest 12, a lower nest 13 and a plurality of ribs 1, characterized in that the upper nest 12 and the lower nest 13 are provided with a hinge part 2 for connecting with the rib 1, the hinge part 2 is provided with a hinge groove 3 on both sides for the rib 1 to move, the hinge groove 3 is provided with a hinge shaft hole 16 penetrating on both sides, the hinge shaft hole 16 is penetrated by a hinge shaft pin 4, one end of the hinge shaft pin 4 is provided with a limiting part 8 for limiting the hinge shaft pin 4 from being pulled out of one end of the hinge shaft hole 16, the hinge part 2 is provided with a blocking structure for limiting the hinge shaft pin 4 from being pulled out of the other end of the hinge shaft hole 16, and the rib 1 is arranged on the hinge shaft pin 4.

[0035] By adopting the above technical scheme, the hinge shaft pin 4 penetratingly arranged in the hinge groove 3 enables the rib 1 to be connected to the hinge part 2 by being arranged on the hinge shaft pin 4, when installing the rib 1, all the ribs 1 can be directly placed in the hinge groove 3, and then the hinge shaft pin 4 can penetrate each rib 1, thereby realizing the connection between the rib 1 and the upper and lower nests 13, after the hinge shaft pin 4 completely penetrates the hinge shaft hole 16, the limiting part 8 on the hinge shaft pin 4 will prevent the hinge shaft pin 4 from continuing to move forward, and by clamping the limiting part 8 and the blocking structure, the hinge shaft pin 4 cannot be pulled out of the hinge shaft hole 16, in this way, the hinge shaft pin 4 can be fixed in the hinge shaft hole 16, compared with the traditional fixing by winding a wire, the assembly process is simpler and more convenient, which is conducive to improving the assembly efficiency, and the scheme can be applied to square umbrellas and other such umbrellas with only the upper nest 12 and the lower nest 13 having the ribs 1 on both sides.

[0036] As shown in Figure 1 and Figure 3As shown, the pivot shaft peg 4 is L-shaped, the limiting portion 8 is the bent part 9 at the end of the pivot shaft peg 4, the pivot shaft peg 4 has two, and the two pivot shaft pegs 4 are respectively arranged in the two side pivot shaft holes 16. By using the L-shaped pivot shaft peg 4, after the vertical part of the pivot shaft peg 4 completely enters the pivot shaft hole 16, the bent part 9 serving as the limiting portion 8 of the pivot shaft peg 4 will abut against the pivot part 2, so that the pivot shaft peg 4 cannot continue to advance. Through the clamping of the limiting portion 8 and the blocking structure, the pivot shaft peg 4 cannot exit the pivot shaft hole 16 backward, and the rotation of the pivot shaft peg 4 is limited so that it cannot rotate to escape the blocking of the blocking structure.

[0037] As shown in Figure 1 , Figure 3 and Figure 5 , the blocking structure includes a baffle 20 fixedly connected with the pivot part 2. The baffle 20 and the pivot part 2 have a placement groove 22 for clamping the limiting portion 8 of the pivot shaft peg 4. The limiting portion 8 abuts against the baffle 20. The baffle 20 is provided with clamping points 21 for limiting the limiting portion 8 from turning out of the placement groove 22. The clamping points 21 are provided in plurality. The spacing between the clamping points 21 and the bottom of the placement groove 22 is smaller than the length of the limiting portion 8. By abutting the baffle 20 fixed on one side of the pivot part 2 against the limiting portion 8 on the pivot shaft peg 4, the backward exit of the pivot shaft peg 4 out of the pivot shaft hole 16 is prevented. At the same time, the clamping points 21 on the baffle 20 can limit the limiting portion 8 in the placement groove 22, so that it cannot exit the placement groove 22. For the L-shaped pivot shaft peg 4, after the pivot shaft peg 4 is inserted into the pivot shaft hole 16, the transverse part serving as the limiting portion 8 of the L-shaped pivot shaft peg 4 can be clamped between the clamping points 21 and the bottom of the placement groove 22 by rotating. The limiting portion 8 is clamped by the clamping points 21 through the elastic deformation of the baffle 20.

[0038] As shown in Figure 1 , the two side pivot grooves 3 are respectively provided with limiting inclined surfaces 5. The limiting inclined surfaces 5 provide space for the ribs 1 to move when the umbrella is unfolded, and limit the tilting direction of the ribs 1, so that the ribs 1 can be unfolded according to the shape of the umbrella canopy 17.

[0039] As shown in Figure 4 , the ribs 1 include main ribs 18 and branch ribs 6. One main rib 18 and one branch rib 6 form a rib group, and the umbrella has at least three rib groups.

[0040] As shown in Figure 4 , the ribs 1 include a plurality of sub-ribs 15, which are rotatably connected with each other. The middle rod 11 includes a plurality of sleeve pipes 14, which are nested and slidably connected with each other. By such arrangement, the umbrella is changed from a straight-rib umbrella to a folding umbrella. The pivot structure of the ribs 1 and the upper nest 12 and the lower nest 13 achieved by the pivot shaft peg 4 can also be used in the folding umbrella.

[0041] As shown in Figure 1 , the umbrella rib 1 is provided on the pivot pin 4 through the pivot hole 7, the diameter of the pivot hole 7 is larger than the pivot pin 4. By being larger than the diameter of the pivot pin 4, the umbrella rib 1 can not only rotate, but also deflect on both sides. When the umbrella is opened, the umbrella rib 1 is fixedly connected to the umbrella surface 17, so that the umbrella rib 1 adjusts the position according to the shape of the umbrella surface 17 under the action of the pivot hole 7, so that the umbrella surface 17 is unfolded.

[0042] Embodiment 2

[0043] As shown in Figure 2 , Figure 3 and Figure 5 , the pivot pin 4 is U-shaped, the limiting portion 8 is the transverse rod 10 in the middle of the pivot pin 4, and the parts on both sides of the transverse rod 10 are vertical rods 19, and the two vertical rods 19 are located in the pivot shaft holes 16 on both sides of the pivot portion 2. By using the U-shaped pivot pin 4, the two vertical rods 19 can be inserted into the pivot shaft holes 16 on both sides of the pivot portion 2 at the same time, realizing the connection between the umbrella rib 1 and the pivot portion 2, and the middle transverse rod 10 of the U-shaped structure constitutes the limiting portion 8 and the pivot portion 2 abutting, so that the two vertical rods 19 of the pivot pin 4 completely enter the pivot shaft hole 16 to limit its continuous entry, and the U-shaped pivot pin 4 can deform the transverse rod 10 part upward by its own elasticity, so as to overcome the blocking structure and be clamped into the blocking structure, so that the pivot pin 4 cannot move backward, thereby realizing the fixation of the pivot pin 4.

[0044] As shown in Figure 2 and Figure 3 , the blocking structure includes a baffle 20, the baffle 20 is fixedly connected with the pivot portion 2, and the baffle 20 and the pivot portion 2 have a placing groove 22 for the limiting portion 8 of the pivot pin 4 to be clamped into, the limiting portion 8 abuts on the baffle 20, and the baffle 20 is provided with a clamping point 21 for limiting the limiting portion 8 from turning out of the placing groove 22, the clamping point 21 is provided with a plurality of clamping points 21, and the distance between the clamping point 21 and the bottom of the placing groove 22 is less than the length of the limiting portion 8. By abutting the baffle 20 fixed on one side of the pivot portion 2 with the limiting portion 8 on the pivot pin 4, the backward disengagement of the limiting portion 8 from the pivot shaft hole 16 can be prevented, and the clamping point 21 on the baffle 20 can limit the limiting portion 8 in the placing groove 22, so that it cannot disengage from the placing groove 22. For the U-shaped pivot pin 4, when clamped into the placing groove 22, the middle transverse rod 10 part of the U-shaped pivot pin 4 is turned upward, and the limiting portion 8 is clamped into the placing groove 22 by deforming the pivot pin 4 itself, thereby realizing the fixation of the U-shaped pivot pin 4.

[0045] It should be noted that in the foregoing description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present application. Accordingly, it is not intended that the present application be limited, except as by the appended claims.

Claims

1. A structure of a pivot pin for connecting an upper nest and a lower nest with a rib of an umbrella, comprising a canopy, a middle rod, an upper nest, a lower nest and a plurality of ribs, characterized in that, The upper and lower nests are provided with a pivot joint for connecting with the umbrella rib, both sides of the pivot joint are provided with a pivot slot for the umbrella rib to move, both sides of the pivot slot are provided with a through pivot shaft hole, both sides of the pivot shaft hole are penetrated by a pivot shaft pin, one end of the pivot shaft pin is provided with a limiting part for limiting the pivot shaft pin from being pulled out from one end of the pivot shaft hole, the pivot joint is provided with a blocking structure for limiting the pivot shaft pin from being pulled out from the other end of the pivot shaft hole, and the umbrella rib is arranged on the pivot shaft pin.

2. The pivot pin structure for connecting the upper and lower umbrella frames and the umbrella ribs according to claim 1, characterized in that: The pivot shaft pin is L-shaped, the limiting part is a bent part at the end of the pivot shaft pin, the pivot shaft pin has two, and the two pivot shaft pins are arranged in the pivot shaft holes on both sides respectively.

3. The pivot pin structure for connecting the upper and lower umbrella frames and the umbrella ribs according to claim 1, characterized in that: The pivot shaft pin is U-shaped, the limiting part is a transverse rod in the middle of the pivot shaft pin, and the parts on both sides of the transverse rod are vertical rods, and the vertical rods on both sides are arranged in the pivot shaft holes on both sides of the pivot joint.

4. The structure of the upper and lower sockets and the shaft pin of the umbrella rib according to any one of claim 2 or claim 3, characterized in that: The blocking structure includes a baffle, the baffle is fixedly connected with the pivot joint, the baffle and the pivot joint have a placing groove for the limiting part of the pivot shaft pin to be clamped into, the limiting part abuts on the baffle, the baffle is provided with a clamping point for limiting the limiting part from turning out of the placing groove, the clamping point is provided with a plurality of clamping points, and the distance between the clamping point and the bottom of the placing groove is smaller than the length of the limiting part.

5. The pivot pin structure for connecting the upper and lower umbrella frames and the umbrella ribs according to claim 1, characterized in that: Both sides of the pivot slot are provided with a limiting inclined surface.

6. The pivotal pin structure for the upper and lower umbrella frames and the umbrella ribs according to claim 1, characterized in that: The umbrella rib includes a main umbrella rib and a branch umbrella rib, one main umbrella rib and one branch umbrella rib form an umbrella rib group, and the umbrella rib group is provided with at least three groups.

7. The umbrella according to claim 6, wherein the pivot pin structure is formed by a pin and a hole. The main umbrella rib includes a plurality of branch ribs, and the branch ribs are rotatably connected with each other, the middle rod includes a plurality of sleeve pipes, and the sleeve pipes are nested and slidably connected with each other.

8. The umbrella according to claim 1, wherein the shaft pin structure is characterized in that: The umbrella rib is arranged on the pivot shaft pin through a pivot hole, the pivot hole is arranged at the inner end of the umbrella rib, and the diameter of the pivot hole is greater than that of the pivot shaft pin.