Reinforced elasticity tri-fold umbrella central shaft structure

Abstract

The present invention provides a resilient, reinforced central shaft structure for a three-fold umbrella that strengthens the force required to open the umbrella without increasing the overall volume of the umbrella after it has been closed. [Solution] The umbrella includes an upper central rod 1, a middle central rod 2, and a lower central rod 3 that are fitted together. An upper honeycomb 11 is provided at the top of the upper central rod, an inner plug 21 is provided at the top of the middle central rod, a first spring 4 is provided inside the middle central rod and the lower central rod, the lower end of the first spring is in contact with the inside of the umbrella handle, a support rod 12 is provided between the upper honeycomb and the inner plug, the lower central rod consists of a first lower central rod 31 and a second lower central rod 32 that are fitted together, a sleeve 22 is provided inside the middle central rod, an inner edge bent inward is provided at the upper end of the sleeve, an outer edge bent outward is provided at the lower end of the sleeve, the upper end of the first spring is in contact with the inner edge, and a second spring is provided between the outer wall of the sleeve and the inner wall of the middle central rod.

Description

Technical Field

[0004] , ,

[0001] The present invention relates to the middle rod structure of an umbrella, and particularly to the middle rod structure of a three-fold umbrella with enhanced elasticity.

Background Art

[0002] The three-fold umbrella has three middle rods that are inserted into each other. The three middle rods are, respectively, an upper middle rod at the top, a middle middle rod in the middle, and a lower middle rod at the bottom. An upper honeycomb is provided at the top end of the upper middle rod, an inner plug is provided at the top end of the middle middle rod, and the umbrella-opening spring for extending the middle rod is provided only inside the middle middle rod and the lower middle rod. No umbrella-opening spring is provided inside the upper middle rod. Instead, the extension of the middle rod is realized by a support rod installed between the upper honeycomb and the inner plug. The support rod expands the upper middle rod as the inner plug moves upward, achieving the purpose of expanding the umbrella. When closing the umbrella, the upper middle rod and the middle middle rod are contracted by the force of the umbrella-closing spring on the umbrella ribs, forming a three-fold state (i.e., the lower middle rod among the three middle rods is not contracted). Then, the operator holds the umbrella handle with one hand and presses the umbrella top with the other hand to contract the lower middle rod, realizing umbrella closing.

[0003] In a conventional three-fold umbrella, since the umbrella-opening spring is provided only inside the middle middle rod and the lower middle rod, there is a problem that the elasticity is insufficient when opening the umbrella and the umbrella cannot be opened. People have considered various means to solve this problem. For example, in order to increase the elasticity of the umbrella-opening spring, in most cases, an umbrella-opening spring with a thick wire diameter and a large diameter is adopted. However, when adopting such an umbrella-opening spring, the diameter of the umbrella middle rod also increases, and the volume of the entire umbrella becomes large. This not only impairs the aesthetics but also causes inconvenience when carrying it.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The objective of this invention is to provide a resilient, reinforced central shaft structure for a three-fold umbrella that can strengthen the force required to open the umbrella without increasing the overall volume of the umbrella after it has been closed. [Means for solving the problem]

[0005] To achieve the above objectives, this invention employs the following technical solutions. The central shaft structure of a resilient three-fold umbrella includes an upper central shaft, a middle central shaft, and a lower central shaft that are fitted together, with an upper honeycomb provided at the top end of the upper central shaft, an inner plug provided at the top end of the middle central shaft, a first spring provided inside the middle central shaft and the lower central shaft, the lower end of the first spring abutting against the inside of the umbrella handle, a support rod provided between the upper honeycomb and the inner plug, the lower central shaft consists of a first lower central shaft and a second lower central shaft that are fitted together, a sleeve provided inside the middle central shaft, an inwardly bent inner edge provided at the upper end of the sleeve, an outwardly bent outer edge provided at the lower end of the sleeve, the upper end of the first spring abutting against the inner edge, a second spring provided between the outer wall of the sleeve and the inner wall of the middle central shaft, the upper end of the second spring abutting against the inner plug, and the lower end of the second spring abutting against the outer edge of the sleeve. [Effects of the Invention]

[0006] This invention comprises a first lower central rod and a second lower central rod that are fitted together, a sleeve is provided inside the central rod, an inner edge bent inward is provided at the upper end of the sleeve, and an outer edge bent outward is provided at the lower end of the sleeve, the upper end of the first spring abuts against the inner edge, a second spring is provided between the outer wall of the sleeve and the inner wall of the central rod, the upper end of the second spring abuts against the inner plug, and the lower end of the second spring abuts against the structure on the outer edge of the sleeve, and because the second spring is increased and the combined elastic force of the second spring and the first spring is greater than that of a conventional umbrella opening spring, the force of opening the umbrella can be significantly strengthened without changing the outer dimensions of the original umbrella central rod and the total length of the original central rod. Therefore, this invention has the advantage of being able to strengthen the force of opening the umbrella without increasing the overall volume of the umbrella after it is closed. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram of a cross-sectional structure according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of a partially enlarged structure of area A in Figure 1. [Modes for carrying out the invention]

[0008] The following describes the technical solutions in this embodiment in detail by combining the drawings. Of course, the embodiments described are only a selection of embodiments, not all embodiments.

[0009] The present invention will be explained in more detail below by combining Figures 1 and 2.

[0010] Figures 1 and 2 show the central shaft structure of a resilient three-fold umbrella, which includes an upper central shaft 1, a middle central shaft 2, and a lower central shaft 3 that are fitted together. An upper honeycomb 11 is provided at the top of the upper central shaft 1, an inner plug 21 is provided at the top of the middle central shaft 2, a first spring 4 is provided inside the middle central shaft 2 and the lower central shaft 3, the lower end of the first spring 4 abuts against the inside of the umbrella handle, a support rod 12 is provided between the upper honeycomb 11 and the inner plug 21, and the lower central shaft 3 is fitted together with a first lower central shaft 31 and a second lower The central rod 32 comprises a sleeve 22 inside the central rod 2, an inner edge 221 bent inward is provided at the upper end of the sleeve 22, and an outer edge 222 bent outward is provided at the lower end of the sleeve 22, the upper end of the first spring 4 abuts against the inner edge 221, a second spring 5 is provided between the outer wall of the sleeve 22 and the inner wall of the central rod 2, the upper end of the second spring 5 abuts against the inner plug 21, and the lower end of the second spring 5 abuts against the outer edge 222 of the sleeve 22.

[0011] This invention comprises a first lower central rod 31 and a second lower central rod 32 into which the lower central rod 3 is fitted together, a sleeve 22 is provided inside the central rod 2, an inner edge 221 bent inward is provided at the upper end of the sleeve 22, an outer edge 222 (see Figure 2) bent outward is provided at the lower end of the sleeve 22, the upper end of the first spring 4 abuts against the inner edge 221, a second spring 5 is provided between the outer wall of the sleeve 22 and the inner wall of the central rod 2, and the upper end of the second spring 5 is forward The lower end of the second spring 5 is in contact with the inner plug 21, and the lower end of the second spring 5 is in contact with the structure on the outer edge 222 of the sleeve 22. The second spring is increased, and the combined force of the elasticity of the second spring 5 and the first spring 4 is greater than the force of a conventional umbrella opening spring. Therefore, this invention can effectively strengthen the force of opening an umbrella without changing the outer dimensions of the original umbrella central shaft or the total length of the original central shaft. Thus, this invention has the advantage of strengthening the force of opening an umbrella without increasing the overall volume of the umbrella after it is closed.

[0012] Preferably, the lengths of the first lower central rod 31 and the second lower central rod 32 after contraction are greater than or equal to the length of the lower central rod 3. After closing the umbrella in this manner, the second lower central rod 32 is contracted into the first lower central rod 31, and the first lower central rod 31 is contracted into the central rod 2. Since both occupy about half of the internal space of the central rod 2, the sleeve 22 can be placed in the other half of the internal space of the central rod 2, and the second spring 5 can be placed between the outer wall of the sleeve 22 and the inner wall of the central rod 2, thereby increasing the elasticity.

[0013] In this invention, the fitting method of the upper central rod 1, the middle central rod 2, the first lower central rod 31, and the second lower central rod 32 is the same as the conventional fitting method, and this application will not repeat itself.

[0014] As described above, this is a preferred specific embodiment of this embodiment, but the scope of protection of this embodiment is not limited thereto. Any person skilled in the art should know that equivalent substitutions or modifications made based on the technical solutions and concepts of the invention of this embodiment, within the technical scope disclosed by this embodiment, should be included within the scope of protection of this embodiment. [Explanation of Symbols]

[0015] 1, Upper middle bar 2, Chubu Chuban 3, lower middle bar 4. First spring 5. The second spring 11. Upper honeycomb 12, support rod 21. Inner plug 22. Sleeves 31. First lower central rod 32. Second lower central bar 221, common-law marriage 222, outer edge

Claims

[Claim 1] The central shaft structure of a resilient three-fold umbrella includes an upper central shaft (1), a middle central shaft (2), and a lower central shaft (3) that are fitted together, with an upper honeycomb (11) provided at the top end of the upper central shaft (1), an inner plug (21) provided at the top end of the middle central shaft (2), a first spring (4) provided inside the middle central shaft (2) and the lower central shaft (3), the lower end of the first spring (4) abutting against the inside of the umbrella handle, and a support rod (12) provided between the upper honeycomb (11) and the inner plug (21), wherein the lower central shaft (3) consists of a first lower central shaft (31) and a second lower central shaft (32) that are fitted together, A central shaft structure for a reinforced elastic three-fold umbrella, characterized in that a sleeve (22) is provided inside the central shaft (2), an inner edge (221) bent inward is provided at the upper end of the sleeve (22), an outer edge (222) bent outward is provided at the lower end of the sleeve (22), the upper end of the first spring (4) abuts against the inner edge (221), a second spring (5) is provided between the outer wall of the sleeve (22) and the inner wall of the central shaft (2), the upper end of the second spring (5) abuts against the inner plug (21), and the lower end of the second spring (5) abuts against the outer edge (222) of the sleeve (22).

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