Buckling structure of telescopic middle rod

Abstract

The utility model discloses a buckling structure of a telescopic middle rod, which comprises the telescopic middle rod, a rod body sleeved with the telescopic middle rod comprises an inner sleeve rod and an outer sleeve rod, one end of the inner sleeve rod is embedded into the outer sleeve rod to form joint, the joint end of the inner sleeve rod is provided with a containing cavity, and an elastic fastener is arranged in the containing cavity. The elastic fastener comprises a first convex fastening part, an arch-shaped part, a warping fulcrum and a second convex fastening part, the protruding direction and the warping direction of the first convex fastening part and the second convex fastening part are the same, a first fastening hole is formed in one side of the joint end of the outer sleeve rod, and a second fastening hole is formed in the other side of the joint end of the outer sleeve rod. According to the utility model, the elastic fastener is only required to be placed into the accommodating cavity to complete the assembly of the fastener, and the first convex fastening part and the second convex fastening part are respectively matched with the first fastening hole and the second fastening hole, so that the fastening and fixing in an opening state and a closing state can be realized by only one component, manual pressing is not needed in the whole process, and the middle rod adopting the structure has the advantages of few parts, simple assembly process and low cost. And during use, the expansion and contraction are smooth and labor-saving, and buckling can be carried out in different states.

Description

Technical Field

[0001] The utility model belongs to the field of umbrella parts, and particularly relates to a buckling structure of a telescopic middle rod. Background Art

[0002] The connection of the middle rods of the existing umbrellas with telescopic middle rods usually adopts a snap-on method of matching elastic protrusions with snap-on holes. The elastic protrusions need to be assembled in the tube holes, and the assembly process is complicated, the cost is high, and the quality is difficult to control. Once the accessories are damaged, it is troublesome to disassemble and replace them. Usually, the whole middle rod is replaced or the umbrella is directly discarded. In order to ensure the service life of the umbrella, the elastic protrusions and other accessories usually need to be made of metal materials, which is not conducive to the conservation and utilization of resources. After assembly, the middle rod is not smooth enough to extend and retract. When using, a certain amount of force is required to open and close the umbrella, which is a poor user experience. In addition, people are usually accustomed to holding the umbrella upside down after the umbrella is folded, and the existing middle rod joint snap-on method can only realize the snapping of different sections of the middle rod in the open state. When the umbrella is folded, the middle rod often becomes loose, which is extremely inconvenient to carry.

[0003] In addition, based on the concept of environmental protection, all-plastic umbrellas have become a new trend in umbrella manufacturing. What kind of plastic fastening components can be used in the fastening structure of the telescopic middle rod to replace the metal fastening components of existing umbrellas while solving the problem of many fastening parts and complex assembly, and how to achieve rapid disassembly and recycling of all parts of the all-plastic umbrella based on the plastic fastening components has become one of the starting points of the present invention. Utility Model Content

[0004] The utility model aims to provide a telescopic middle rod fastening structure to solve the problems that the middle rod fastening parts of existing umbrellas have many parts, complex assembly, are not easy to disassemble and replace, are not smoothly telescoped during use, and lack a fixed structure after folding, which is easy to loosen. The structure is particularly suitable for application on all-plastic umbrellas.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model proposes a telescopic middle rod buckling structure, comprising a middle rod, wherein the middle rod is a telescopic structure formed by sleeve-jointing at least two rod sections, wherein each sleeve-jointed rod section comprises an inner sleeve rod and an outer sleeve rod, and one end of the inner sleeve rod is embedded in the outer sleeve rod to form a joint, wherein the joint end of the inner sleeve rod is provided with a single-side opening accommodating cavity, wherein an elastic fastener is provided in the accommodating cavity, wherein the elastic fastener comprises a warping fulcrum, wherein the warping fulcrum extends to both sides to form a first convex buckle portion and a second convex buckle portion, wherein the protruding directions of the first convex buckle portion and the second convex buckle portion are the same as the warping direction and are respectively arranged at both ends of the elastic fastener; a first buckling hole cooperating with the first convex buckle portion is provided on one side of the joint end of the outer sleeve rod, and a second buckling hole cooperating with the second convex buckle portion is provided on the other side of the outer sleeve rod away from the joint end;

[0007] Based on the above scheme, for an umbrella with a telescopic middle rod, the elastic fastener can be directly placed in the accommodating cavity to complete the assembly. When the umbrella is opened, the first convex buckle part and the first buckle hole cooperate to achieve buckling and fixation. When the umbrella is folded, the second convex buckle part and the second buckle hole cooperate to achieve buckling and fixation. The first convex buckle part and the second convex buckle part are elastically switched through the warping fulcrum without manual pressing. The middle rod assembly method is simple, and the buckling and fixation of the umbrella in the open and folded states can be achieved by only one component, and it is easy to replace and repair.

[0008] Furthermore, the first convex buckle portion is connected to the warping fulcrum through a bow portion. This design allows the first convex buckle portion to be designed according to the buckling stability requirements of the umbrella-opening state through the torque principle, and maintains the first convex buckle portion with sufficient elastic deformation space to facilitate smooth storage in the accommodating cavity, making buckling and unlocking more labor-saving.

[0009] Furthermore, the first convex buckle portion includes an inclined convex surface, and the end of the inclined convex surface forms a second stop portion that cooperates with the first buckling hole. This design facilitates the mutual sleeved rod bodies to be quickly and labor-savingly unlocked and smoothly stored in the accommodating cavity during the folding process of the umbrella, thereby improving the smoothness of the folding of the middle rod.

[0010] Preferably, the first convex buckle portion also includes an inclined buckle surface, which connects the inclined convex surface and the second stop portion. This design allows the first convex buckle portion to transition smoothly relative to the first buckling hole when engaging and unlocking, thereby reducing the friction between the two when sliding relative to each other.

[0011] Preferably, the side of the first buckle portion opposite to its protruding direction is configured to be arched, so as to further increase the elastic deformation of the first buckle portion and reduce the force required to be applied when the first buckle portion is unlocked.

[0012] Furthermore, a first stop is provided at the front end of the first convex buckle portion, and a avoidance hole for the first stop is also opened in the accommodating cavity. The avoidance hole is arranged on the other side of the accommodating cavity opposite to the opening and opposite to the first stop. This design can keep the elastic fastener in the accommodating cavity at all times through the design of the first stop, and at the same time, the opening depth of the accommodating cavity can be reduced through the design of the avoidance hole, thereby simplifying the processing technology and ensuring the structural strength of the middle rod, while meeting the requirement of fully accommodating the first convex buckle portion.

[0013] Furthermore, the second convex buckle portion is provided with an upward convex smooth curved surface. This design facilitates that during the opening process of the umbrella, a small force can be applied to smoothly accommodate the second convex buckle portion in the accommodating cavity, thereby realizing the switching of the mutually sleeved rod bodies from the engaged state to the disengaged state.

[0014] Furthermore, in the aforementioned solution, the elastic fastener and the middle rod are both made of plastic material to reduce the difficulty and cost of manufacturing each component, and also allow the umbrella to be fully plasticized, which has better environmental protection characteristics.

[0015] Furthermore, the inner sleeve rod is a hollow rod body, which is conducive to designing the middle rod into multiple sections and lightweight design of the middle rod.

[0016] Furthermore, the outer sleeve rod is sleeved with a second outer sleeve rod to form a middle rod structure that is small at the top and large at the bottom, or the inner sleeve rod is sleeved with a second inner sleeve rod to form a middle rod structure that is large at the top and small at the bottom. Regardless of the form of the middle rod structure, the buckling structure can be applied.

[0017] Beneficial Effects

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

[0019] 1) In order to solve the problem of complicated assembly process of the existing middle rod, a receiving cavity is opened at the joint end of the inner sleeve rod, and a warped elastic fastener is placed in the receiving cavity. When assembling, it is only necessary to place the elastic fastener in the receiving cavity, and the inner and outer sleeve rods are interlocked to complete the installation. There are few parts, and there is no need to additionally damage the rod body of the middle rod. The assembly process is extremely simple, and the quality of the umbrella is highly controllable. When the elastic fastener or a section of the rod body of the middle rod is damaged, it is only necessary to separate the connected rod bodies from each other to complete the disassembly, and the maintenance convenience is extremely high. At the same time, the structure allows the elastic fastener and the middle rod to be made of plastic materials, and each component is easy to form, which further reduces the manufacturing difficulty and cost, and meets the requirements of full plasticization of each component of the all-plastic umbrella and rapid disassembly of each component for easy recycling.

[0020] 2) By using two sets of fastening structures on the same elastic fastener, the middle rod can be fastened and fixed in both the open and folded states of the umbrella with only one fastening component, which not only satisfies the requirement that the adjacent rods are fastened and fixed at the joint ends when the umbrella is opened, but also satisfies the requirement that the adjacent rods still have a relatively fixed structure when the umbrella is folded and are not easy to loosen. The umbrella using this structure has the advantages of a simple fastening structure, easy daily storage and carrying, and a good user experience.

[0021] 3) In order to solve the problems of the existing middle stick being not smoothly extended and retracted and not effortlessly unlocked, an inclined convex surface and an inclined buckle surface are provided on the first convex buckle part, the protruding surface of the second convex buckle part is set as an upper convex smooth curved surface, and a warping fulcrum is provided on the elastic fastener, so as to realize the elastic switching and smooth storage of the first convex buckle part and the second convex buckle part. When in use, it is only necessary to pull the upper umbrella nest of the umbrella to realize the unlocking and fixing of the adjacent rod bodies of the middle stick in the open or folded state. No manual pressing is required throughout the whole process, and no too much force needs to be applied. The middle stick can be smoothly extended and retracted, and it is convenient and effortless to use, which is particularly friendly to vulnerable groups such as children and the elderly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 It is a structural schematic diagram of the utility model in the expanded state;

[0024] Figure 2 For this utility model Figure 1 Schematic diagram of the decomposition structure;

[0025] Figure 3 For this utility model Figure 1 Schematic cross-sectional view of ;

[0026] Figure 4 It is a cross-sectional structural schematic diagram of the utility model in a folded state;

[0027] Figure 5 It is a schematic diagram of the structure of the elastic fastener of the utility model;

[0028] Figure 6 This is another schematic diagram of the middle rod structure of the utility model.

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

[0030] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0031] The utility model proposes a telescopic middle rod buckling structure, including a middle rod 100, an upper umbrella nest 200 is fixedly provided at the top of the middle rod 100, a lower umbrella nest 300 is slidably sleeved on the middle rod 100, and the middle rod 100 is a telescopic structure formed by at least two rod bodies being sleeved, each of which 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, and the joint end of the inner sleeve rod 10 is provided with a single-side opening accommodating cavity 11, wherein the inner sleeve rod 10 can be designed as The entire rod is a hollow rod structure, and the accommodating cavity 11 is correspondingly configured as an embedded groove; the inner sleeve rod 10 can also be designed as a solid rod at the joint end and a hollow rod at the non-joint end, and the accommodating cavity 11 is opened in the solid rod at the joint end; even the inner sleeve rod 10 of the innermost layer can be designed as a full solid rod, so as to strengthen the structural strength of the middle rod 100 when applied to a full plastic umbrella, and even further optimize the connection structure between the upper umbrella nest 200 and the middle rod 100; an elastic fastener 30 is provided in the accommodating cavity 11, such as Figure 5 As shown, the elastic fastener 30 includes a warping fulcrum 34, and the warping fulcrum 34 extends to the same side to form a first convex buckle portion 32 and a second convex buckle portion 35 to form a warping structure. The protruding directions 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 30, wherein the second convex buckle portion 35 is directly expanded by the extended end of the warping fulcrum 34 and has an upper convex smooth curved surface 351; the first convex buckle portion 32 is connected to the warping fulcrum 34 through an arched portion 33, and the first convex buckle portion 32 includes an oblique convex surface 321, an oblique buckle surface 322 and a second stopper 323, and the front end of the oblique convex surface 321 is provided with a first stopper 31 (it should be noted that, as an alternative to the first stopper 31: the oblique convex The front end of the surface 321 is directly extended to form a blocking portion or the front end of the inclined convex surface 321 is set as a smooth curved surface so that the first convex buckle portion 32 can smoothly fall back into the accommodating cavity when unlocking), 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 a second blocking portion 323, and the non-convex surface of the first convex buckle portion 32 (that is, the other side opposite to the inclined convex surface 321 and the inclined buckle surface 322) is set to an arch. Through the arrangement of this structure and the arched portion 33, the first convex buckle portion 32 can have 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 the umbrella is held, and is conducive to the first convex buckle portion 32 when it is pressed downward and stored in the accommodating cavity 11. Only a small force is required to achieve elastic deformation, and both buckling and unlocking are more labor-saving.

[0032] Preferably, a avoidance hole 111 for the first stop portion 31 is further provided in the accommodating cavity 11. The avoidance hole 111 is provided on the other side of the accommodating cavity 11 opposite to the opening and opposite to the first stop portion 31, so as to reduce the opening depth of the accommodating cavity 11 while fully accommodating the first convex buckle portion 32, thereby reducing the processing difficulty of the inner sleeve rod 10 and ensuring that the middle rod 100 has sufficient strength.

[0033] like Figure 1-Figure 4 The outer sleeve 20 has a first buckling hole 21 on one side of the coupling end thereof that cooperates with the first convex buckle portion 32, and a second buckling hole 22 on the other side of the outer sleeve 20 that cooperates with the second convex buckle portion 35 that cooperates with the second convex buckle portion 35. When the first convex buckle portion 32 is buckled and unlocked, its inclined convex surface 321 and inclined buckle surface 322 slide relative to the first buckling hole 21, and when the second convex buckle portion 35 is buckled and unlocked, its upper convex smooth curved surface 351 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 convex buckle portion 32 and the second convex buckle portion 35 are correspondingly set as matching guide surfaces to reduce the friction during relative sliding during the buckling and unlocking process, so as to realize more labor-saving extension and retraction of the middle rod 100.

[0034] Preferably, in the above scheme, the elastic fastener 30 and the middle rod 100 are both made of plastic material, which is convenient for the processing and molding of various components, especially the elastic fastener 30, and reduces the manufacturing difficulty and cost. On the other hand, it also meets the requirements of full plasticization of various components of the all-plastic umbrella and quick disassembly of various components for recycling. As a feasible implementation method, when the middle rod 100 is in two sections, the upper umbrella nest 200 is fixed to the top of the inner sleeve rod 10, and when the middle rod 100 is in three sections or more, the outer sleeve rod 20 is also sleeved with a second outer sleeve rod to form a middle rod 100 structure with a small top and a large bottom, such as Figure 4 As shown, at this time, the first convex buckle portion 32 of the elastic buckle 30 is arranged above the second convex buckle portion 35 .

[0035] As a feasible implementation, when the middle rod 100 is in two sections, the upper umbrella nest 200 is fixed to the top of the outer rod 20. When the middle rod 100 is in three sections or more, the inner sleeve rod 10 is further connected with a second inner sleeve rod to form a middle rod 100 structure with a larger upper part and a smaller lower part. Figure 6 As shown, at this time, the second convex buckle portion 35 of the elastic buckle 30 is arranged above the first convex buckle portion 32 .

[0036] During assembly, the elastic fastener 30 is directly placed in the accommodating cavity 11, and the inner and outer rods 20 are connected to each other to complete the assembly. The assembly process is simple and convenient. At the same time, it is convenient to disassemble and replace the elastic fastener 30 when it is damaged, and the maintenance convenience is high. In actual use, when the umbrella needs to be opened, the upper umbrella nest 200 is pushed to slide along the outermost rod body (i.e., the outer rod 20) to its top, and then the inner rod 10 adjacent to the outer rod 20 is driven to slide upward relative to it. The upper convex smooth curved surface 351 of the second convex buckle portion 35 slides relative to the edge of the second buckle hole 22 and is re-stored in the accommodating cavity 11. When the inner rod 10 continues to move upward until only its joint end contacts the outer rod 20, the first convex buckle portion 32 is just located at the first buckle At the engaging hole 21, the first convex buckle part 32 is acted upon by elastic force, and its oblique convex surface 321 and oblique buckle surface 322 pass through the first engaging hole 21, and the second stopper 323 abuts against the edge of the first engaging hole 21, completing the buckling and fixing of the inner sleeve rod 10 and the outer sleeve rod 20 of the set of sleeves, and the upper umbrella nest 200 continues to move upward to sequentially complete the buckling and fixing of each sleeved inner sleeve rod 10 and the outer sleeve rod 20; when the umbrella needs to be folded, the upper umbrella nest 200 is pulled along the topmost rod body of the middle rod The upper umbrella nest 200 slides down to the first convex buckle portion 32, and the upper umbrella nest 200 presses the oblique convex surface 321 of the first convex buckle portion 32 to accommodate the first convex buckle portion 32 in the accommodating cavity 11. At the same time, the oblique buckle surface 322 slides relative to the edge of the first buckling hole 21 to reduce the accommodation resistance of the first convex buckle portion 32. The upper umbrella nest 200 drives the inner sleeve rod 10 to continue to move downward, and the elastic fastener 30 is completely accommodated in the accommodating cavity 11. When the inner sleeve rod 10 moves downward to the lowest point, the second convex buckle portion 35 is located at the first convex buckle portion 35. The second buckling holes 22 are elastically protruded outside the second buckling holes 22 to realize the buckling and fixation of the inner sleeve rod 10 and the outer sleeve rod 20 in the folded state. The upper umbrella nest 200 continues to descend and sequentially completes the unlocking of the first convex buckle part 32 and the buckling of the second convex buckle part at the joint end of each phase of the inner sleeve rod 10 and the outer sleeve rod 20 until the umbrella is completely folded. During the entire opening and folding process of the umbrella, the unlocking and buckling of the middle rod do not require manual pressing, and the extension and retraction of the middle rod are smooth and effortless.The specific change process of the elastic fastener is as follows: when the umbrella is in the open state, the second convex buckle portion 35 of the elastic fastener 30 is restricted by the outer rod 20 and is stored in the accommodating cavity 11, and an elastic force is formed between the warping fulcrum 34 and the second convex buckle portion 35, the first convex buckle portion 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 stop portion 31 abuts against the edge of the first buckling hole 21 to form a limit, and the inner rod 10 and the outer rod 20 are buckled; when the umbrella needs to be folded, the lower umbrella nest 300 moves downward from top to bottom to press the oblique convex surface 321 of each first convex buckle portion 32 in turn, so that the first convex buckle portion 32 moves downward. When the inner rod 10 is received in the accommodating cavity 11, the adjacent rod sections are unlocked. The inner rod 10 slides relative to the outer rod 20 to the bottom of the outer rod 20. When the second convex buckle portion 35 is located at the second buckling hole 22, it passes through the second buckling hole 22 under the action of elastic force to complete the second buckling of the inner rod 10 and the outer rod 20, 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 convex buckle portion 35 be received in the accommodating cavity 11 again, so as to unlock the adjacent rods 100 until the first convex buckle portion 32 is located at the first buckling hole 21 and buckles again.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A telescopic middle rod buckling structure, comprising a middle rod (100), wherein the middle rod (100) is a telescopic structure formed by at least two rod sections being sleeved together, wherein each sleeved rod section 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, and wherein: 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 arranged in the accommodating cavity (11), and 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), and 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 two ends of the elastic fastener; a first buckling hole (21) cooperating with the first convex buckle portion (32) is provided on one side of the joint end of the outer sleeve rod (20), and a second buckling hole (22) cooperating with the second convex buckle portion (35) is provided on the other side of the outer sleeve rod (20) away from the joint end.

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 inclined convex surface (321), and a second stop portion (323) that cooperates with the first buckling hole (21) is formed at the end of the inclined convex surface (321).

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 inclined buckle surface (322), wherein the inclined buckle surface (322) connects the inclined 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 first convex buckle portion (32) is configured in an arch shape on a side opposite to the convex direction thereof.

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 avoidance hole (111) for the first stopper (31) is also provided in the accommodating cavity (11). The position avoidance 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 upward 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 sleeved with a second outer sleeve rod, or the inner sleeve rod (10) is sleeved with a second inner sleeve rod.

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