Fastening structure of telescopic middle shaft

Abstract

A fastening structure of a telescopic middle shaft, comprising a telescopic middle shaft (100). Mutually-sleeved pole bodies each comprise an inner sleeved pole (10) and an outer sleeved pole (20), one end of the inner sleeved pole (10) being sleeved in the outer sleeved pole (20) to be engaged; the engagement end of the inner sleeved pole (10) is provided with an accommodating cavity (11), in which an elastic fastener (30) is provided; the elastic fastener (30) comprises a first protruding part (32), an arch-shaped part (33), a warping fulcrum (34) and a second protruding part (35), the first and second protruding parts (32, 35) having a protruding direction the same as a warping direction and being respectively arranged at both ends of the elastic fastener (30); one side of the engagement end of the outer sleeved pole (20) is provided with a first fastening hole (21), while the other side thereof is provided with a second fastening hole (22). A fastener can be assembled simply by placing the elastic fastener (30) into the accommodating cavity (11) and, by means of the fit between the first and second protruding fasteners (32, 35) and the first and second fastening holes (21, 22), a single component can implement fastening fixation in two states, i.e. an open state and an closed state, without human pressing in the entire process. The fastening structure has few parts and a simple assembly process, is easy to disassemble and replace, and achieves smooth and labor-efficient extension and retraction in use.

Description

A buckle structure of telescopic middle rod TECHNICAL FIELD

[0001] The present application belongs to the field of umbrella components, and particularly relates to a buckle structure of telescopic middle rod. BACKGROUND

[0002] The existing umbrella with telescopic middle rod usually adopts the buckle mode of elastic protrusion and buckle hole cooperation for the joint of each section of middle rod, and the elastic protrusion needs to be assembled in the pipe hole, which has complex assembly process, high cost and poor quality control. Once the accessory is damaged, it is troublesome to disassemble and replace, and usually the entire middle rod or the umbrella is replaced or discarded directly. In order to ensure the service life of the umbrella, the elastic protrusion and other accessories are usually made of metal material, which is not conducive to the conservation and utilization of resources. After assembly, the telescopic middle rod is not smooth enough, and a certain force needs to be applied to realize the opening and closing of the umbrella, which has poor experience. In addition, people are usually used to holding the umbrella upside down after folding the umbrella, and the existing joint buckle mode of middle rod can only realize the buckling of different sections of middle rod in the open umbrella state, and the problem of middle rod loosening often occurs after the umbrella is folded, which is extremely inconvenient to carry.

[0003] In addition, based on the concept of environmental protection, the all-plastic umbrella has become a new trend in umbrella manufacturing. What form of plastic buckling component can be used in the buckle structure of telescopic middle rod to replace the existing metal buckling component of umbrella, and how to realize the quick disassembly and recycling of all parts of the all-plastic umbrella based on the plastic buckling component have become one of the starting points of the present application.

[0004] SUMMARY

[0005] The present application aims to provide a buckle structure of telescopic middle rod to solve the problems of existing umbrella, such as many buckling components of middle rod, complex assembly, difficult disassembly and replacement, telescopic middle rod not smooth enough during use, and lack of fixing structure after folding, which is especially suitable for application in all-plastic umbrella.

[0006] The present application is realized by the following technical scheme:

[0007] The application provides a buckle structure of a telescopic middle rod, which comprises a middle rod, wherein the middle rod is a telescopic structure formed by sleeving at least two rod bodies, each sleeved rod body comprises an inner sleeve rod and an outer sleeve rod, and the inner sleeve rod is embedded into the outer sleeve rod at one end to form a joint, the joint end of the inner sleeve rod is provided with a one-side opening accommodating cavity, the accommodating cavity is provided with an elastic buckle, the elastic buckle comprises a warping fulcrum, the warping fulcrum extends to both sides to form a first convex buckle part and a second convex buckle part, the convex directions of the first convex buckle part and the second convex buckle part are the same as the warping direction, and the first convex buckle part and the second convex buckle part are arranged at two ends of the elastic buckle respectively, one side of the joint end of the outer sleeve rod is provided with a first buckle hole matched with the first convex buckle part, and the other side of the outer sleeve rod away from the joint end is provided with a second buckle hole matched with the second convex buckle part.

[0008] Based on the above scheme, the umbrella with the telescopic middle rod can be assembled by directly placing the elastic buckle in the accommodating cavity, the first convex buckle part and the first buckle hole are matched to realize buckle fixing when the umbrella is opened, the second convex buckle part and the second buckle hole are matched to realize buckle fixing when the umbrella is closed, the first convex buckle part and the second convex buckle part are elastically switched through the warping fulcrum, manual pressing is not needed, the middle rod has the characteristics of simple assembly mode, the buckle fixing of the two states of opening and closing of the umbrella can be realized through only one component, and the middle rod is easy to replace and maintain.

[0009] Further, the first convex buckle part is connected with the warping fulcrum through an arcuate part, the design allows the first convex buckle part to be designed according to the buckle stability requirement of the umbrella opening state through the principle of moment, and the first convex buckle part has sufficient elastic deformation space to facilitate smooth storage in the accommodating cavity, and the buckle and unlocking are more labor-saving.

[0010] Further, the first convex buckle part comprises an inclined convex surface, and the end of the inclined convex surface forms a second stop part matched with the first buckle hole, the design facilitates the mutually sleeved rod bodies to be quickly and labor-savingly unlocked and smoothly stored in the accommodating cavity during the closing process of the umbrella, and the smoothness of the middle rod closing is improved.

[0011] Preferably, the first convex buckle part further comprises an inclined buckle surface, and the inclined buckle surface connects the inclined convex surface and the second stop part, the design can make the first convex buckle part smoothly pass the first buckle hole during the buckle and unlocking, so as to reduce the friction force when the two relatively slide.

[0012] Preferably, the side opposite to the convex direction of the first convex buckle part is arched, so as to further increase the elastic deformation amount of the first convex buckle part and reduce the force required when the first convex buckle part is unlocked.

[0013] Further, the first protruding buckle part is provided with a first blocking part, and a first blocking part avoiding hole is arranged in the accommodating cavity, the avoiding hole is arranged on the other side of the accommodating cavity opposite to the opening and opposite to the first blocking part, the design of the first blocking part can keep the elastic buckle part in the accommodating cavity, and the design of the avoiding hole can reduce the opening depth of the accommodating cavity, simplify the processing technology, ensure the structural strength of the middle rod, and meet the requirement of accommodating the first protruding buckle part.

[0014] Further, the second protruding buckle part is provided with an upper convex smooth surface, which facilitates the smooth accommodation of the second protruding buckle part in the accommodating cavity by applying a small force during the opening of the umbrella, and realizes the switching of the mutual sleeving rod body from the buckling state to the disengagement state.

[0015] Further, in the foregoing scheme, the elastic buckle part and the middle rod are made of plastic material, so as to reduce the manufacturing difficulty and cost of each component, and allow the full plastic production of the umbrella, which has better environmental protection characteristics.

[0016] Further, the inner sleeve rod is a hollow rod body, which facilitates the design of the middle rod as multiple sections and the lightweight design of the middle rod.

[0017] Further, the outer sleeve rod is further sleeved with a second outer sleeve rod to form a middle rod structure with a large size at the top and a small size at the bottom, or the inner sleeve rod is further sleeved with a second inner sleeve rod to form a middle rod structure with a large size at the top and a small size at the bottom, and no matter what kind of middle rod structure form is used, the buckling structure can be applied. Advantages

[0018] One of the above technical solutions has the following advantages or beneficial effects:

[0019] 1) To solve the problem of complex assembly process of the existing middle rod, an accommodating cavity is arranged at the joint end of the inner sleeve rod, and a warped elastic buckle part is placed in the accommodating cavity, during assembly, the elastic buckle part is only placed in the accommodating cavity, and the inner and outer sleeve rods are embedded in each other to complete the installation, the number of components is small, the middle rod does not need to be damaged, the assembly process is extremely simple, the quality of the umbrella is controllable, and when the elastic buckle part or the middle rod is damaged, the sleeved rods can be disengaged to complete the disassembly, which is extremely convenient for maintenance; at the same time, the elastic buckle part and the middle rod are made of plastic material, the components are easy to form, the manufacturing difficulty and cost are further reduced, and the requirements of full plasticization of each component of the full plastic umbrella and quick disassembly of each component for recycling are met.

[0020] 2) through two groups of buckling structure on the same elastic buckle, only one buckling part can realize the buckling and fixing of the middle rod in the open and closed states of the umbrella, which not only satisfies the buckling and fixing of the adjacent rod bodies at the joint end when the umbrella is opened, but also satisfies the relative fixing structure of the adjacent rod bodies when the umbrella is closed, which is not easy to loosen, and the umbrella with the structure has the advantages of simple buckling structure, convenient daily storage and carrying, and good experience.

[0021] 3) to solve the problems of unsmooth extension and unlocking of the existing middle rod, the inclined convex surface and the inclined buckle surface are arranged on the first convex buckle part, the convex surface of the second convex buckle part is arranged as an upper convex smooth curved surface, and the flexure fulcrum is arranged on the elastic buckle, so that the elastic switching and smooth storage of the first convex buckle part and the second convex buckle part are realized, and when the upper umbrella nest of the umbrella is pulled, the unlocking and fixing of the adjacent rod bodies of the middle rod in the open or closed state are realized, without manual pressing or applying too much force throughout the process, with the advantages of smooth extension of the middle rod, convenient use and labor saving, which is particularly friendly to the vulnerable groups such as children and the elderly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Fig. 1 is a schematic view of the structure of the present application in the open state;

[0024] Fig. 2 is a schematic view of the exploded structure of Fig. 1 of the present application;

[0025] Fig. 3 is a schematic view of the cross section of Fig. 1 of the present application;

[0026] Fig. 4 is a schematic view of the cross section of the closed state of the present application;

[0027] Fig. 5 is a schematic view of the structure of the elastic buckle of the present application;

[0028] Fig. 6 is a schematic view of another middle rod structure of the present application.

[0029] In the drawings: middle rod 100; upper umbrella nest 200; lower umbrella nest 300; inner sleeve rod 10; accommodating cavity 11; avoiding hole 111; outer sleeve rod 20; first buckling hole 21; second buckling hole 22; elastic buckle 30; first stop 31; first convex buckle 32; inclined convex surface 321; inclined buckle surface 322; second stop 323; arcuate portion 33; flexure fulcrum 34; second convex buckle 35; upper convex smooth curved surface 351. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below in conjunction with the embodiments, but the embodiments of the present application are not limited thereto.

[0031] The application provides a buckle structure of telescopic middle rod, which comprises a middle rod 100, an upper umbrella nest 200 fixedly arranged at the top end of the middle rod 100, and a lower umbrella nest 300 slidably sleeved on the middle rod 100. The middle rod 100 is a telescopic structure formed by sleeving at least two rod bodies, each sleeved rod body comprises an inner sleeve rod 10 and an outer sleeve rod 20, and the inner sleeve rod 10 is embedded into the outer sleeve rod 20 at one end to form a joint. The joint end of the inner sleeve rod 10 is provided with a one-side opening accommodating cavity 11. The inner sleeve rod 10 can be designed as a structure in which all the rods are hollow rods, and the accommodating cavity 11 is correspondingly arranged as an embedded groove type. The inner sleeve rod 10 can also be designed as a structure in which the joint end is a solid rod body and the non-joint end is a hollow rod body, and the accommodating cavity 11 is arranged in the solid rod body at the joint end. Even the innermost inner sleeve rod 10 can be designed as a full solid rod body, so as to strengthen the structural strength of the middle rod 100 and further optimize the connection structure of the upper umbrella nest 200 and the middle rod 100 when the full-plastic umbrella is applied. The accommodating cavity 11 is provided with an elastic buckle 30, as shown in FIG. 5. The elastic buckle 30 comprises a warping fulcrum 34, the warping fulcrum 34 extends to the same side to form a first convex buckle part 32 and a second convex buckle part 35 to form a warping structure, the protruding directions of the first convex buckle part 32 and the second convex buckle part 35 are the same as the warping direction and are arranged at the two ends of the elastic buckle 30. The second convex buckle part 35 is directly enlarged at the extension end of the warping fulcrum 34 and has an upper convex smooth surface 351. The first convex buckle part 32 is connected with the warping fulcrum 34 through an arc part 33. The first convex buckle part 32 comprises an inclined convex surface 321, an inclined buckle surface 322 and a second blocking part 323. The front end of the inclined convex surface 321 is provided with a first blocking part 31 (it should be noted that the front end of the inclined convex surface 321 is directly extended to form a blocking part or is arranged as a smooth surface so that the first convex buckle part 32 can smoothly fall into the accommodating cavity when being unlocked). The end of the inclined convex surface 321 is provided with the inclined buckle surface 322, and the end of the inclined buckle surface 322 is provided with the second blocking part 323. The non-protruding surface of the first convex buckle part 32 (i.e. the other surface opposite to the inclined convex surface 321 and the inclined buckle surface 322) is arranged as an arch shape. Through the structure and the arrangement of the arc part 33, the first convex buckle part 32 has a larger deformation allowance and is easy to deform, which can ensure the buckling stability of the inner sleeve rod 10 and the outer sleeve rod 20 when supporting the umbrella and facilitate the elastic deformation of the first convex buckle part 32 when being downwardly accommodated in the accommodating cavity 11 under pressure, so that a smaller force can be applied to realize the buckling and unlocking.

[0032] Preferably, the accommodating cavity 11 is further provided with a first blocking hole 111 of the first blocking part 31, which is arranged at the other side of the accommodating cavity 11 opposite to the opening and opposite to the first blocking part 31, so as to reduce the depth of the accommodating cavity 11 under the premise of completely accommodating the first protruding buckle part 32, thereby reducing the processing difficulty of the inner sleeve rod 10 and ensuring that the middle rod 100 has sufficient strength.

[0033] As shown in FIGS. 1-4, the combined end of the outer sleeve rod 20 is provided with a first buckling hole 21 matched with the first protruding buckle part 32, and the other side of the outer sleeve rod 20 away from the combined end is provided with a second buckling hole 22 matched with the second protruding buckle part 35. When the first protruding buckle part 32 is buckled and unlocked, the inclined convex surface 321 and the inclined buckling surface 322 thereof slide relative to the first buckling hole 21. When the second protruding buckle part 35 is buckled and unlocked, the upper convex smooth surface 351 thereof slides relative to the second buckling hole 22. Optionally, the contact surfaces of the first buckling hole 21 and the second buckling hole 22 and the first protruding buckle part 32 and the second protruding buckle part 35 are correspondingly provided with guiding surfaces matched therewith, so as to reduce the friction force during the relative sliding in the buckling and unlocking process, and to realize more labor-saving extension and contraction of the middle rod 100.

[0034] Preferably, in the foregoing scheme, the elastic buckle part 30 and the middle rod 100 are both made of plastic material, which on the one hand facilitates the processing and molding of each component, especially the elastic buckle part 30, and reduces the manufacturing difficulty and cost, and on the other hand also meets the requirements of full plasticization of each component of the full plastic umbrella and rapid disassembly of each component for recycling. As a feasible implementation manner, when the middle rod 100 is two segments, the upper umbrella nest 200 is fixed to the top end of the inner sleeve rod 10. When the number of segments of the middle rod 100 is three or more than three, the outer sleeve rod 20 is further sleeved with a second outer sleeve rod to form a middle rod 100 structure with the upper part being larger and the lower part being smaller, as shown in FIG. 4. At this time, the first protruding buckle part 32 of the elastic buckle part 30 is arranged above the second protruding buckle part 35.

[0035] As a feasible implementation manner, when the middle rod 100 is two segments, the upper umbrella nest 200 is fixed to the top end of the outer sleeve rod 20. When the number of segments of the middle rod 100 is three or more than three, the inner sleeve rod 10 is further internally connected with a second inner sleeve rod to form a middle rod 100 structure with the upper part being larger and the lower part being smaller, as shown in FIG. 6. At this time, the second protruding buckle part 35 of the elastic buckle part 30 is arranged above the first protruding buckle part 32.

[0036] In assembly, the elastic fastener 30 is directly placed in the accommodating cavity 11, and the inner and outer sleeve rods 20 are sleeved with each other, so that the assembly is completed. The assembly process is simple and convenient, and the elastic fastener 30 is convenient to disassemble and replace when damaged. In actual use, when the umbrella is needed to be opened, the upper umbrella nest 200 is pushed to slide to the top end of the outermost rod (i.e. the outer sleeve rod 20), and drives the inner sleeve rod 10 adjacent to the outer sleeve rod 20 to slide upward relative to the outer sleeve rod 20. The upper convex smooth surface 351 of the second convex buckle part 35 is re-stored in the accommodating cavity 11 relative to the edge of the second buckling hole 22. When the inner sleeve rod 10 continues to go upward to only the joint end thereof being in contact with the outer sleeve rod 20, the first convex buckle part 32 is located at the first buckling hole 21. The first convex buckle part 32 is subjected to elastic force, the inclined convex surface 321 and the inclined buckle surface 322 of the first convex buckle part 32 are out of the first buckling hole 21, and the second stop part 323 is in abutment with the edge of the first buckling hole 21, so that the buckling and fixing of the inner sleeve rod 10 and the outer sleeve rod 20 of each sleeved group are completed. The upper umbrella nest 200 continues to go upward to sequentially complete the buckling and fixing of the inner sleeve rod 10 and the outer sleeve rod 20 of each sleeved group. When the umbrella is needed to be folded, the upper umbrella nest 200 is pulled to slide downward along the topmost rod of the middle rod to the first convex buckle part 32. The upper umbrella nest 200 presses the inclined convex surface 321 of the first convex buckle part 32 to make the first convex buckle part 32 be stored in the accommodating cavity 11. At the same time, the inclined buckle surface 322 slides relative to the edge of the first buckling hole 21 to reduce the storage resistance of the first convex buckle part 32. The upper umbrella nest 200 drives the inner sleeve rod 10 to continue to go downward, and the elastic fastener 30 is completely stored in the accommodating cavity 11. When the inner sleeve rod 10 goes downward to the lowest position, the second convex buckle part 35 is located at the second buckling hole 22 and is subjected to elastic force to protrude out of the second buckling hole 22 to realize the buckling and fixing of the inner sleeve rod 10 and the outer sleeve rod 20 in the folded state. The upper umbrella nest 200 continues to go downward to sequentially complete the unlocking of the first convex buckle part 32 at the joint end of each sleeved inner sleeve rod 10 and outer sleeve rod 20 and the buckling of the second convex buckle part. In the opening and folding process of the entire umbrella, the unlocking and buckling and fixing of the middle rod do not need to be pressed by hand. The middle rod stretches and contracts smoothly and without effort.The specific variation process of the elastic fastener is as follows: when the umbrella is in the open state, the second protruding buckle part 35 of the elastic fastener 30 is accommodated in the accommodating cavity 11 under the restriction of the outer sleeve rod 20, the elastic force is formed between the warping fulcrum 34 and the second protruding buckle part 35, the first protruding buckle part 32 is located at the first buckling hole 21 and passes through the first buckling hole 21 under the action of the elastic force, the first blocking part 31 abuts against the edge of the first buckling hole 21 to form a limit, and the inner sleeve rod 10 and the outer sleeve rod 20 are buckled; when the umbrella needs to be folded, the lower umbrella nest 300 descends from top to bottom to press the inclined convex surface 321 of each first protruding buckle part 32 in turn, so that the first protruding buckle part 32 is accommodated downward in the accommodating cavity 11 to realize the unlocking of the adjacent section rod body, the inner sleeve rod 10 slides relative to the outer sleeve rod 20 to the bottom of the outer sleeve rod 20, the second protruding buckle part 35 is located at the position of the second buckling hole 22, passes through the second buckling hole 22 under the action of the elastic force, and the second buckling of the inner sleeve rod 10 and the outer sleeve rod 20 is completed, that is, the buckling when the umbrella is folded; when the umbrella needs to be opened again, the lower umbrella nest 300 drives the rod body of the middle rod 100 to slide in turn and makes each second protruding buckle part 35 be accommodated in the accommodating cavity 11 again, realizes the unlocking of the adjacent section middle rod 100, and the first protruding buckle part 32 is located at the first buckling hole 21 again to realize the buckling.

[0037] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Any slight modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment still belongs to the protection scope of the present application.

Claims

1. A telescopic middle rod fastening structure, comprising a middle rod (100), wherein the middle rod (100) is a telescopic structure formed by at least two rod sections being connected in a sleeve manner, wherein each of the connected rod sections comprises an inner sleeve rod (10) and an outer sleeve rod (20), and one end of the inner sleeve rod (10) is embedded in the outer sleeve rod (20) to form a joint, characterized in that: The joint end of the inner sleeve rod (10) is provided with a single-side opening accommodating cavity (11), and an elastic fastener (30) is provided in the accommodating cavity (11). The elastic fastener (30) includes a warping fulcrum (34), and the warping fulcrum (34) extends to both sides to form a first convex buckle portion (32) and a second convex buckle portion (35). The protruding direction of the first convex buckle portion (32) and the second convex buckle portion (35) are the same as the warping direction and are respectively arranged at the two ends of the elastic fastener; a first buckling hole (21) is provided on one side of the joint end of the outer sleeve rod (20) to cooperate with the first buckle portion (32), and a second buckling hole (22) is provided on the other side of the outer sleeve rod (20) away from the joint end to cooperate with the second buckle portion (35).

2. The buckling structure of the telescopic middle rod according to claim 1, characterized in that: The first convex buckle portion (32) is connected to the warping fulcrum (34) via an arched portion (33).

3. The buckling structure of the telescopic middle rod according to claim 1, characterized in that: The first convex buckle portion (32) comprises an oblique convex surface (321), and the end of the oblique convex surface (321) forms a second stop portion (323) that cooperates with the first buckling hole (21).

4. The buckling structure of the telescopic middle rod according to claim 3, characterized in that: The first convex buckle portion (32) further comprises an oblique buckle surface (322), wherein the oblique buckle surface (322) connects the oblique convex surface (321) and the second stop portion (323).

5. The buckling structure of the telescopic middle rod according to claim 3, characterized in that: The side of the first convex buckle portion (32) opposite to its protruding direction is configured as an arch.

6. The buckling structure of the telescopic middle rod according to claim 1, characterized in that: A first stopper (31) is provided at the front end of the first convex buckle portion (32), and a position-avoiding hole (111) for the first stopper (31) is also provided in the accommodating cavity (11). The position-avoiding hole (111) is provided on the other side of the accommodating cavity (11) opposite to the opening and opposite to the first stopper (31).

7. The buckling structure of the telescopic middle rod according to claim 1, characterized in that: The second convex buckle portion (35) is provided with an upper convex smooth curved surface (351).

8. The buckling structure of the telescopic middle rod according to any one of claims 1 to 7, characterized in that: The elastic fastener (30) and the middle rod (100) are both made of plastic material.

9. The buckling structure of the telescopic middle rod according to any one of claims 1 to 7, characterized in that: The inner sleeve rod (10) is a hollow rod body.

10. The buckling structure of the telescopic middle rod according to claim 9, characterized in that: The outer sleeve rod (20) is also sleeved with a second outer sleeve rod, or the inner sleeve rod (10) is also sleeved with a second inner sleeve rod.

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